Add Tegra specific clocks, pll, pll_out, peripheral, frac_divider, super.
Signed-off-by: Prashant Gaikwad <pgaikwad@nvidia.com>
[swarren: alloc sizeof(*foo) not sizeof(struct foo), add comments re:
storing pointers to stack variables, make a timeout loop more idiomatic,
use _clk_pll_disable() not clk_disable_pll() from _program_pll() to
avoid redundant lock operations, unified tegra_clk_periph() and
tegra_clk_periph_nodiv(), unified tegra_clk_pll{,e}, rename all clock
registration functions so they don't have the same name as the clock
structs, return -EINVAL from clk_plle_enable when matching table rate
not found, pass ops to _tegra_clk_register_pll rather than a bool.]
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
obj-$(CONFIG_ARCH_VT8500) += clk-vt8500.o
obj-$(CONFIG_ARCH_SUNXI) += clk-sunxi.o
obj-$(CONFIG_ARCH_ZYNQ) += clk-zynq.o
+obj-$(CONFIG_ARCH_TEGRA) += tegra/
# Chip specific
obj-$(CONFIG_COMMON_CLK_WM831X) += clk-wm831x.o
--- /dev/null
+obj-y += clk.o
+obj-y += clk-audio-sync.o
+obj-y += clk-divider.o
+obj-y += clk-periph.o
+obj-y += clk-periph-gate.o
+obj-y += clk-pll.o
+obj-y += clk-pll-out.o
+obj-y += clk-super.o
--- /dev/null
+/*
+ * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+
+#include "clk.h"
+
+static unsigned long clk_sync_source_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct tegra_clk_sync_source *sync = to_clk_sync_source(hw);
+
+ return sync->rate;
+}
+
+static long clk_sync_source_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *prate)
+{
+ struct tegra_clk_sync_source *sync = to_clk_sync_source(hw);
+
+ if (rate > sync->max_rate)
+ return -EINVAL;
+ else
+ return rate;
+}
+
+static int clk_sync_source_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct tegra_clk_sync_source *sync = to_clk_sync_source(hw);
+
+ sync->rate = rate;
+ return 0;
+}
+
+const struct clk_ops tegra_clk_sync_source_ops = {
+ .round_rate = clk_sync_source_round_rate,
+ .set_rate = clk_sync_source_set_rate,
+ .recalc_rate = clk_sync_source_recalc_rate,
+};
+
+struct clk *tegra_clk_register_sync_source(const char *name,
+ unsigned long rate, unsigned long max_rate)
+{
+ struct tegra_clk_sync_source *sync;
+ struct clk_init_data init;
+ struct clk *clk;
+
+ sync = kzalloc(sizeof(*sync), GFP_KERNEL);
+ if (!sync) {
+ pr_err("%s: could not allocate sync source clk\n", __func__);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ sync->rate = rate;
+ sync->max_rate = max_rate;
+
+ init.ops = &tegra_clk_sync_source_ops;
+ init.name = name;
+ init.flags = CLK_IS_ROOT;
+ init.parent_names = NULL;
+ init.num_parents = 0;
+
+ /* Data in .init is copied by clk_register(), so stack variable OK */
+ sync->hw.init = &init;
+
+ clk = clk_register(NULL, &sync->hw);
+ if (IS_ERR(clk))
+ kfree(sync);
+
+ return clk;
+}
--- /dev/null
+/*
+ * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/kernel.h>
+#include <linux/io.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/clk-provider.h>
+#include <linux/clk.h>
+
+#include "clk.h"
+
+#define pll_out_override(p) (BIT((p->shift - 6)))
+#define div_mask(d) ((1 << (d->width)) - 1)
+#define get_mul(d) (1 << d->frac_width)
+#define get_max_div(d) div_mask(d)
+
+#define PERIPH_CLK_UART_DIV_ENB BIT(24)
+
+static int get_div(struct tegra_clk_frac_div *divider, unsigned long rate,
+ unsigned long parent_rate)
+{
+ s64 divider_ux1 = parent_rate;
+ u8 flags = divider->flags;
+ int mul;
+
+ if (!rate)
+ return 0;
+
+ mul = get_mul(divider);
+
+ if (!(flags & TEGRA_DIVIDER_INT))
+ divider_ux1 *= mul;
+
+ if (flags & TEGRA_DIVIDER_ROUND_UP)
+ divider_ux1 += rate - 1;
+
+ do_div(divider_ux1, rate);
+
+ if (flags & TEGRA_DIVIDER_INT)
+ divider_ux1 *= mul;
+
+ divider_ux1 -= mul;
+
+ if (divider_ux1 < 0)
+ return 0;
+
+ if (divider_ux1 > get_max_div(divider))
+ return -EINVAL;
+
+ return divider_ux1;
+}
+
+static unsigned long clk_frac_div_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct tegra_clk_frac_div *divider = to_clk_frac_div(hw);
+ u32 reg;
+ int div, mul;
+ u64 rate = parent_rate;
+
+ reg = readl_relaxed(divider->reg) >> divider->shift;
+ div = reg & div_mask(divider);
+
+ mul = get_mul(divider);
+ div += mul;
+
+ rate *= mul;
+ rate += div - 1;
+ do_div(rate, div);
+
+ return rate;
+}
+
+static long clk_frac_div_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *prate)
+{
+ struct tegra_clk_frac_div *divider = to_clk_frac_div(hw);
+ int div, mul;
+ unsigned long output_rate = *prate;
+
+ if (!rate)
+ return output_rate;
+
+ div = get_div(divider, rate, output_rate);
+ if (div < 0)
+ return *prate;
+
+ mul = get_mul(divider);
+
+ return DIV_ROUND_UP(output_rate * mul, div + mul);
+}
+
+static int clk_frac_div_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct tegra_clk_frac_div *divider = to_clk_frac_div(hw);
+ int div;
+ unsigned long flags = 0;
+ u32 val;
+
+ div = get_div(divider, rate, parent_rate);
+ if (div < 0)
+ return div;
+
+ if (divider->lock)
+ spin_lock_irqsave(divider->lock, flags);
+
+ val = readl_relaxed(divider->reg);
+ val &= ~(div_mask(divider) << divider->shift);
+ val |= div << divider->shift;
+
+ if (divider->flags & TEGRA_DIVIDER_UART) {
+ if (div)
+ val |= PERIPH_CLK_UART_DIV_ENB;
+ else
+ val &= ~PERIPH_CLK_UART_DIV_ENB;
+ }
+
+ if (divider->flags & TEGRA_DIVIDER_FIXED)
+ val |= pll_out_override(divider);
+
+ writel_relaxed(val, divider->reg);
+
+ if (divider->lock)
+ spin_unlock_irqrestore(divider->lock, flags);
+
+ return 0;
+}
+
+const struct clk_ops tegra_clk_frac_div_ops = {
+ .recalc_rate = clk_frac_div_recalc_rate,
+ .set_rate = clk_frac_div_set_rate,
+ .round_rate = clk_frac_div_round_rate,
+};
+
+struct clk *tegra_clk_register_divider(const char *name,
+ const char *parent_name, void __iomem *reg,
+ unsigned long flags, u8 clk_divider_flags, u8 shift, u8 width,
+ u8 frac_width, spinlock_t *lock)
+{
+ struct tegra_clk_frac_div *divider;
+ struct clk *clk;
+ struct clk_init_data init;
+
+ divider = kzalloc(sizeof(*divider), GFP_KERNEL);
+ if (!divider) {
+ pr_err("%s: could not allocate fractional divider clk\n",
+ __func__);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ init.name = name;
+ init.ops = &tegra_clk_frac_div_ops;
+ init.flags = flags;
+ init.parent_names = parent_name ? &parent_name : NULL;
+ init.num_parents = parent_name ? 1 : 0;
+
+ divider->reg = reg;
+ divider->shift = shift;
+ divider->width = width;
+ divider->frac_width = frac_width;
+ divider->lock = lock;
+ divider->flags = clk_divider_flags;
+
+ /* Data in .init is copied by clk_register(), so stack variable OK */
+ divider->hw.init = &init;
+
+ clk = clk_register(NULL, ÷r->hw);
+ if (IS_ERR(clk))
+ kfree(divider);
+
+ return clk;
+}
--- /dev/null
+/*
+ * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/slab.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/tegra-soc.h>
+
+#include "clk.h"
+
+static DEFINE_SPINLOCK(periph_ref_lock);
+
+/* Macros to assist peripheral gate clock */
+#define read_enb(gate) \
+ readl_relaxed(gate->clk_base + (gate->regs->enb_reg))
+#define write_enb_set(val, gate) \
+ writel_relaxed(val, gate->clk_base + (gate->regs->enb_set_reg))
+#define write_enb_clr(val, gate) \
+ writel_relaxed(val, gate->clk_base + (gate->regs->enb_clr_reg))
+
+#define read_rst(gate) \
+ readl_relaxed(gate->clk_base + (gate->regs->rst_reg))
+#define write_rst_set(val, gate) \
+ writel_relaxed(val, gate->clk_base + (gate->regs->rst_set_reg))
+#define write_rst_clr(val, gate) \
+ writel_relaxed(val, gate->clk_base + (gate->regs->rst_clr_reg))
+
+#define periph_clk_to_bit(periph) (1 << (gate->clk_num % 32))
+
+/* Peripheral gate clock ops */
+static int clk_periph_is_enabled(struct clk_hw *hw)
+{
+ struct tegra_clk_periph_gate *gate = to_clk_periph_gate(hw);
+ int state = 1;
+
+ if (!(read_enb(gate) & periph_clk_to_bit(gate)))
+ state = 0;
+
+ if (!(gate->flags & TEGRA_PERIPH_NO_RESET))
+ if (read_rst(gate) & periph_clk_to_bit(gate))
+ state = 0;
+
+ return state;
+}
+
+static int clk_periph_enable(struct clk_hw *hw)
+{
+ struct tegra_clk_periph_gate *gate = to_clk_periph_gate(hw);
+ unsigned long flags = 0;
+
+ spin_lock_irqsave(&periph_ref_lock, flags);
+
+ gate->enable_refcnt[gate->clk_num]++;
+ if (gate->enable_refcnt[gate->clk_num] > 1) {
+ spin_unlock_irqrestore(&periph_ref_lock, flags);
+ return 0;
+ }
+
+ write_enb_set(periph_clk_to_bit(gate), gate);
+ udelay(2);
+
+ if (!(gate->flags & TEGRA_PERIPH_NO_RESET) &&
+ !(gate->flags & TEGRA_PERIPH_MANUAL_RESET)) {
+ if (read_rst(gate) & periph_clk_to_bit(gate)) {
+ udelay(5); /* reset propogation delay */
+ write_rst_clr(periph_clk_to_bit(gate), gate);
+ }
+ }
+
+ spin_unlock_irqrestore(&periph_ref_lock, flags);
+
+ return 0;
+}
+
+static void clk_periph_disable(struct clk_hw *hw)
+{
+ struct tegra_clk_periph_gate *gate = to_clk_periph_gate(hw);
+ unsigned long flags = 0;
+
+ spin_lock_irqsave(&periph_ref_lock, flags);
+
+ gate->enable_refcnt[gate->clk_num]--;
+ if (gate->enable_refcnt[gate->clk_num] > 0) {
+ spin_unlock_irqrestore(&periph_ref_lock, flags);
+ return;
+ }
+
+ /*
+ * If peripheral is in the APB bus then read the APB bus to
+ * flush the write operation in apb bus. This will avoid the
+ * peripheral access after disabling clock
+ */
+ if (gate->flags & TEGRA_PERIPH_ON_APB)
+ tegra_read_chipid();
+
+ write_enb_clr(periph_clk_to_bit(gate), gate);
+
+ spin_unlock_irqrestore(&periph_ref_lock, flags);
+}
+
+void tegra_periph_reset(struct tegra_clk_periph_gate *gate, bool assert)
+{
+ if (gate->flags & TEGRA_PERIPH_NO_RESET)
+ return;
+
+ if (assert) {
+ /*
+ * If peripheral is in the APB bus then read the APB bus to
+ * flush the write operation in apb bus. This will avoid the
+ * peripheral access after disabling clock
+ */
+ if (gate->flags & TEGRA_PERIPH_ON_APB)
+ tegra_read_chipid();
+
+ write_rst_set(periph_clk_to_bit(gate), gate);
+ } else {
+ write_rst_clr(periph_clk_to_bit(gate), gate);
+ }
+}
+
+const struct clk_ops tegra_clk_periph_gate_ops = {
+ .is_enabled = clk_periph_is_enabled,
+ .enable = clk_periph_enable,
+ .disable = clk_periph_disable,
+};
+
+struct clk *tegra_clk_register_periph_gate(const char *name,
+ const char *parent_name, u8 gate_flags, void __iomem *clk_base,
+ unsigned long flags, int clk_num,
+ struct tegra_clk_periph_regs *pregs, int *enable_refcnt)
+{
+ struct tegra_clk_periph_gate *gate;
+ struct clk *clk;
+ struct clk_init_data init;
+
+ gate = kzalloc(sizeof(*gate), GFP_KERNEL);
+ if (!gate) {
+ pr_err("%s: could not allocate periph gate clk\n", __func__);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ init.name = name;
+ init.flags = flags;
+ init.parent_names = parent_name ? &parent_name : NULL;
+ init.num_parents = parent_name ? 1 : 0;
+ init.ops = &tegra_clk_periph_gate_ops;
+
+ gate->magic = TEGRA_CLK_PERIPH_GATE_MAGIC;
+ gate->clk_base = clk_base;
+ gate->clk_num = clk_num;
+ gate->flags = gate_flags;
+ gate->enable_refcnt = enable_refcnt;
+ gate->regs = pregs;
+
+ /* Data in .init is copied by clk_register(), so stack variable OK */
+ gate->hw.init = &init;
+
+ clk = clk_register(NULL, &gate->hw);
+ if (IS_ERR(clk))
+ kfree(gate);
+
+ return clk;
+}
--- /dev/null
+/*
+ * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+
+#include "clk.h"
+
+static u8 clk_periph_get_parent(struct clk_hw *hw)
+{
+ struct tegra_clk_periph *periph = to_clk_periph(hw);
+ const struct clk_ops *mux_ops = periph->mux_ops;
+ struct clk_hw *mux_hw = &periph->mux.hw;
+
+ mux_hw->clk = hw->clk;
+
+ return mux_ops->get_parent(mux_hw);
+}
+
+static int clk_periph_set_parent(struct clk_hw *hw, u8 index)
+{
+ struct tegra_clk_periph *periph = to_clk_periph(hw);
+ const struct clk_ops *mux_ops = periph->mux_ops;
+ struct clk_hw *mux_hw = &periph->mux.hw;
+
+ mux_hw->clk = hw->clk;
+
+ return mux_ops->set_parent(mux_hw, index);
+}
+
+static unsigned long clk_periph_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct tegra_clk_periph *periph = to_clk_periph(hw);
+ const struct clk_ops *div_ops = periph->div_ops;
+ struct clk_hw *div_hw = &periph->divider.hw;
+
+ div_hw->clk = hw->clk;
+
+ return div_ops->recalc_rate(div_hw, parent_rate);
+}
+
+static long clk_periph_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *prate)
+{
+ struct tegra_clk_periph *periph = to_clk_periph(hw);
+ const struct clk_ops *div_ops = periph->div_ops;
+ struct clk_hw *div_hw = &periph->divider.hw;
+
+ div_hw->clk = hw->clk;
+
+ return div_ops->round_rate(div_hw, rate, prate);
+}
+
+static int clk_periph_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct tegra_clk_periph *periph = to_clk_periph(hw);
+ const struct clk_ops *div_ops = periph->div_ops;
+ struct clk_hw *div_hw = &periph->divider.hw;
+
+ div_hw->clk = hw->clk;
+
+ return div_ops->set_rate(div_hw, rate, parent_rate);
+}
+
+static int clk_periph_is_enabled(struct clk_hw *hw)
+{
+ struct tegra_clk_periph *periph = to_clk_periph(hw);
+ const struct clk_ops *gate_ops = periph->gate_ops;
+ struct clk_hw *gate_hw = &periph->gate.hw;
+
+ gate_hw->clk = hw->clk;
+
+ return gate_ops->is_enabled(gate_hw);
+}
+
+static int clk_periph_enable(struct clk_hw *hw)
+{
+ struct tegra_clk_periph *periph = to_clk_periph(hw);
+ const struct clk_ops *gate_ops = periph->gate_ops;
+ struct clk_hw *gate_hw = &periph->gate.hw;
+
+ gate_hw->clk = hw->clk;
+
+ return gate_ops->enable(gate_hw);
+}
+
+static void clk_periph_disable(struct clk_hw *hw)
+{
+ struct tegra_clk_periph *periph = to_clk_periph(hw);
+ const struct clk_ops *gate_ops = periph->gate_ops;
+ struct clk_hw *gate_hw = &periph->gate.hw;
+
+ gate_ops->disable(gate_hw);
+}
+
+const struct clk_ops tegra_clk_periph_ops = {
+ .get_parent = clk_periph_get_parent,
+ .set_parent = clk_periph_set_parent,
+ .recalc_rate = clk_periph_recalc_rate,
+ .round_rate = clk_periph_round_rate,
+ .set_rate = clk_periph_set_rate,
+ .is_enabled = clk_periph_is_enabled,
+ .enable = clk_periph_enable,
+ .disable = clk_periph_disable,
+};
+
+const struct clk_ops tegra_clk_periph_nodiv_ops = {
+ .get_parent = clk_periph_get_parent,
+ .set_parent = clk_periph_set_parent,
+ .is_enabled = clk_periph_is_enabled,
+ .enable = clk_periph_enable,
+ .disable = clk_periph_disable,
+};
+
+static struct clk *_tegra_clk_register_periph(const char *name,
+ const char **parent_names, int num_parents,
+ struct tegra_clk_periph *periph,
+ void __iomem *clk_base, u32 offset, bool div)
+{
+ struct clk *clk;
+ struct clk_init_data init;
+
+ init.name = name;
+ init.ops = div ? &tegra_clk_periph_ops : &tegra_clk_periph_nodiv_ops;
+ init.flags = div ? 0 : CLK_SET_RATE_PARENT;
+ init.parent_names = parent_names;
+ init.num_parents = num_parents;
+
+ /* Data in .init is copied by clk_register(), so stack variable OK */
+ periph->hw.init = &init;
+ periph->magic = TEGRA_CLK_PERIPH_MAGIC;
+ periph->mux.reg = clk_base + offset;
+ periph->divider.reg = div ? (clk_base + offset) : NULL;
+ periph->gate.clk_base = clk_base;
+
+ clk = clk_register(NULL, &periph->hw);
+ if (IS_ERR(clk))
+ return clk;
+
+ periph->mux.hw.clk = clk;
+ periph->divider.hw.clk = div ? clk : NULL;
+ periph->gate.hw.clk = clk;
+
+ return clk;
+}
+
+struct clk *tegra_clk_register_periph(const char *name,
+ const char **parent_names, int num_parents,
+ struct tegra_clk_periph *periph, void __iomem *clk_base,
+ u32 offset)
+{
+ return _tegra_clk_register_periph(name, parent_names, num_parents,
+ periph, clk_base, offset, true);
+}
+
+struct clk *tegra_clk_register_periph_nodiv(const char *name,
+ const char **parent_names, int num_parents,
+ struct tegra_clk_periph *periph, void __iomem *clk_base,
+ u32 offset)
+{
+ return _tegra_clk_register_periph(name, parent_names, num_parents,
+ periph, clk_base, offset, false);
+}
--- /dev/null
+/*
+ * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/kernel.h>
+#include <linux/io.h>
+#include <linux/err.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/clk-provider.h>
+#include <linux/clk.h>
+
+#include "clk.h"
+
+#define pll_out_enb(p) (BIT(p->enb_bit_idx))
+#define pll_out_rst(p) (BIT(p->rst_bit_idx))
+
+static int clk_pll_out_is_enabled(struct clk_hw *hw)
+{
+ struct tegra_clk_pll_out *pll_out = to_clk_pll_out(hw);
+ u32 val = readl_relaxed(pll_out->reg);
+ int state;
+
+ state = (val & pll_out_enb(pll_out)) ? 1 : 0;
+ if (!(val & (pll_out_rst(pll_out))))
+ state = 0;
+ return state;
+}
+
+static int clk_pll_out_enable(struct clk_hw *hw)
+{
+ struct tegra_clk_pll_out *pll_out = to_clk_pll_out(hw);
+ unsigned long flags = 0;
+ u32 val;
+
+ if (pll_out->lock)
+ spin_lock_irqsave(pll_out->lock, flags);
+
+ val = readl_relaxed(pll_out->reg);
+
+ val |= (pll_out_enb(pll_out) | pll_out_rst(pll_out));
+
+ writel_relaxed(val, pll_out->reg);
+ udelay(2);
+
+ if (pll_out->lock)
+ spin_unlock_irqrestore(pll_out->lock, flags);
+
+ return 0;
+}
+
+static void clk_pll_out_disable(struct clk_hw *hw)
+{
+ struct tegra_clk_pll_out *pll_out = to_clk_pll_out(hw);
+ unsigned long flags = 0;
+ u32 val;
+
+ if (pll_out->lock)
+ spin_lock_irqsave(pll_out->lock, flags);
+
+ val = readl_relaxed(pll_out->reg);
+
+ val &= ~(pll_out_enb(pll_out) | pll_out_rst(pll_out));
+
+ writel_relaxed(val, pll_out->reg);
+ udelay(2);
+
+ if (pll_out->lock)
+ spin_unlock_irqrestore(pll_out->lock, flags);
+}
+
+const struct clk_ops tegra_clk_pll_out_ops = {
+ .is_enabled = clk_pll_out_is_enabled,
+ .enable = clk_pll_out_enable,
+ .disable = clk_pll_out_disable,
+};
+
+struct clk *tegra_clk_register_pll_out(const char *name,
+ const char *parent_name, void __iomem *reg, u8 enb_bit_idx,
+ u8 rst_bit_idx, unsigned long flags, u8 pll_out_flags,
+ spinlock_t *lock)
+{
+ struct tegra_clk_pll_out *pll_out;
+ struct clk *clk;
+ struct clk_init_data init;
+
+ pll_out = kzalloc(sizeof(*pll_out), GFP_KERNEL);
+ if (!pll_out)
+ return ERR_PTR(-ENOMEM);
+
+ init.name = name;
+ init.ops = &tegra_clk_pll_out_ops;
+ init.parent_names = (parent_name ? &parent_name : NULL);
+ init.num_parents = (parent_name ? 1 : 0);
+ init.flags = flags;
+
+ pll_out->reg = reg;
+ pll_out->enb_bit_idx = enb_bit_idx;
+ pll_out->rst_bit_idx = rst_bit_idx;
+ pll_out->flags = pll_out_flags;
+ pll_out->lock = lock;
+
+ /* Data in .init is copied by clk_register(), so stack variable OK */
+ pll_out->hw.init = &init;
+
+ clk = clk_register(NULL, &pll_out->hw);
+ if (IS_ERR(clk))
+ kfree(pll_out);
+
+ return clk;
+}
--- /dev/null
+/*
+ * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/slab.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/clk-provider.h>
+#include <linux/clk.h>
+
+#include "clk.h"
+
+#define PLL_BASE_BYPASS BIT(31)
+#define PLL_BASE_ENABLE BIT(30)
+#define PLL_BASE_REF_ENABLE BIT(29)
+#define PLL_BASE_OVERRIDE BIT(28)
+
+#define PLL_BASE_DIVP_SHIFT 20
+#define PLL_BASE_DIVP_WIDTH 3
+#define PLL_BASE_DIVN_SHIFT 8
+#define PLL_BASE_DIVN_WIDTH 10
+#define PLL_BASE_DIVM_SHIFT 0
+#define PLL_BASE_DIVM_WIDTH 5
+#define PLLU_POST_DIVP_MASK 0x1
+
+#define PLL_MISC_DCCON_SHIFT 20
+#define PLL_MISC_CPCON_SHIFT 8
+#define PLL_MISC_CPCON_WIDTH 4
+#define PLL_MISC_CPCON_MASK ((1 << PLL_MISC_CPCON_WIDTH) - 1)
+#define PLL_MISC_LFCON_SHIFT 4
+#define PLL_MISC_LFCON_WIDTH 4
+#define PLL_MISC_LFCON_MASK ((1 << PLL_MISC_LFCON_WIDTH) - 1)
+#define PLL_MISC_VCOCON_SHIFT 0
+#define PLL_MISC_VCOCON_WIDTH 4
+#define PLL_MISC_VCOCON_MASK ((1 << PLL_MISC_VCOCON_WIDTH) - 1)
+
+#define OUT_OF_TABLE_CPCON 8
+
+#define PMC_PLLP_WB0_OVERRIDE 0xf8
+#define PMC_PLLP_WB0_OVERRIDE_PLLM_ENABLE BIT(12)
+#define PMC_PLLP_WB0_OVERRIDE_PLLM_OVERRIDE BIT(11)
+
+#define PLL_POST_LOCK_DELAY 50
+
+#define PLLDU_LFCON_SET_DIVN 600
+
+#define PLLE_BASE_DIVCML_SHIFT 24
+#define PLLE_BASE_DIVCML_WIDTH 4
+#define PLLE_BASE_DIVP_SHIFT 16
+#define PLLE_BASE_DIVP_WIDTH 7
+#define PLLE_BASE_DIVN_SHIFT 8
+#define PLLE_BASE_DIVN_WIDTH 8
+#define PLLE_BASE_DIVM_SHIFT 0
+#define PLLE_BASE_DIVM_WIDTH 8
+
+#define PLLE_MISC_SETUP_BASE_SHIFT 16
+#define PLLE_MISC_SETUP_BASE_MASK (0xffff << PLLE_MISC_SETUP_BASE_SHIFT)
+#define PLLE_MISC_LOCK_ENABLE BIT(9)
+#define PLLE_MISC_READY BIT(15)
+#define PLLE_MISC_SETUP_EX_SHIFT 2
+#define PLLE_MISC_SETUP_EX_MASK (3 << PLLE_MISC_SETUP_EX_SHIFT)
+#define PLLE_MISC_SETUP_MASK (PLLE_MISC_SETUP_BASE_MASK | \
+ PLLE_MISC_SETUP_EX_MASK)
+#define PLLE_MISC_SETUP_VALUE (7 << PLLE_MISC_SETUP_BASE_SHIFT)
+
+#define PLLE_SS_CTRL 0x68
+#define PLLE_SS_DISABLE (7 << 10)
+
+#define PMC_SATA_PWRGT 0x1ac
+#define PMC_SATA_PWRGT_PLLE_IDDQ_VALUE BIT(5)
+#define PMC_SATA_PWRGT_PLLE_IDDQ_SWCTL BIT(4)
+
+#define pll_readl(offset, p) readl_relaxed(p->clk_base + offset)
+#define pll_readl_base(p) pll_readl(p->params->base_reg, p)
+#define pll_readl_misc(p) pll_readl(p->params->misc_reg, p)
+
+#define pll_writel(val, offset, p) writel_relaxed(val, p->clk_base + offset)
+#define pll_writel_base(val, p) pll_writel(val, p->params->base_reg, p)
+#define pll_writel_misc(val, p) pll_writel(val, p->params->misc_reg, p)
+
+#define mask(w) ((1 << (w)) - 1)
+#define divm_mask(p) mask(p->divm_width)
+#define divn_mask(p) mask(p->divn_width)
+#define divp_mask(p) (p->flags & TEGRA_PLLU ? PLLU_POST_DIVP_MASK : \
+ mask(p->divp_width))
+
+#define divm_max(p) (divm_mask(p))
+#define divn_max(p) (divn_mask(p))
+#define divp_max(p) (1 << (divp_mask(p)))
+
+static void clk_pll_enable_lock(struct tegra_clk_pll *pll)
+{
+ u32 val;
+
+ if (!(pll->flags & TEGRA_PLL_USE_LOCK))
+ return;
+
+ val = pll_readl_misc(pll);
+ val |= BIT(pll->params->lock_enable_bit_idx);
+ pll_writel_misc(val, pll);
+}
+
+static int clk_pll_wait_for_lock(struct tegra_clk_pll *pll,
+ void __iomem *lock_addr, u32 lock_bit_idx)
+{
+ int i;
+ u32 val;
+
+ if (!(pll->flags & TEGRA_PLL_USE_LOCK)) {
+ udelay(pll->params->lock_delay);
+ return 0;
+ }
+
+ for (i = 0; i < pll->params->lock_delay; i++) {
+ val = readl_relaxed(lock_addr);
+ if (val & BIT(lock_bit_idx)) {
+ udelay(PLL_POST_LOCK_DELAY);
+ return 0;
+ }
+ udelay(2); /* timeout = 2 * lock time */
+ }
+
+ pr_err("%s: Timed out waiting for pll %s lock\n", __func__,
+ __clk_get_name(pll->hw.clk));
+
+ return -1;
+}
+
+static int clk_pll_is_enabled(struct clk_hw *hw)
+{
+ struct tegra_clk_pll *pll = to_clk_pll(hw);
+ u32 val;
+
+ if (pll->flags & TEGRA_PLLM) {
+ val = readl_relaxed(pll->pmc + PMC_PLLP_WB0_OVERRIDE);
+ if (val & PMC_PLLP_WB0_OVERRIDE_PLLM_OVERRIDE)
+ return val & PMC_PLLP_WB0_OVERRIDE_PLLM_ENABLE ? 1 : 0;
+ }
+
+ val = pll_readl_base(pll);
+
+ return val & PLL_BASE_ENABLE ? 1 : 0;
+}
+
+static int _clk_pll_enable(struct clk_hw *hw)
+{
+ struct tegra_clk_pll *pll = to_clk_pll(hw);
+ u32 val;
+
+ clk_pll_enable_lock(pll);
+
+ val = pll_readl_base(pll);
+ val &= ~PLL_BASE_BYPASS;
+ val |= PLL_BASE_ENABLE;
+ pll_writel_base(val, pll);
+
+ if (pll->flags & TEGRA_PLLM) {
+ val = readl_relaxed(pll->pmc + PMC_PLLP_WB0_OVERRIDE);
+ val |= PMC_PLLP_WB0_OVERRIDE_PLLM_ENABLE;
+ writel_relaxed(val, pll->pmc + PMC_PLLP_WB0_OVERRIDE);
+ }
+
+ clk_pll_wait_for_lock(pll, pll->clk_base + pll->params->base_reg,
+ pll->params->lock_bit_idx);
+
+ return 0;
+}
+
+static void _clk_pll_disable(struct clk_hw *hw)
+{
+ struct tegra_clk_pll *pll = to_clk_pll(hw);
+ u32 val;
+
+ val = pll_readl_base(pll);
+ val &= ~(PLL_BASE_BYPASS | PLL_BASE_ENABLE);
+ pll_writel_base(val, pll);
+
+ if (pll->flags & TEGRA_PLLM) {
+ val = readl_relaxed(pll->pmc + PMC_PLLP_WB0_OVERRIDE);
+ val &= ~PMC_PLLP_WB0_OVERRIDE_PLLM_ENABLE;
+ writel_relaxed(val, pll->pmc + PMC_PLLP_WB0_OVERRIDE);
+ }
+}
+
+static int clk_pll_enable(struct clk_hw *hw)
+{
+ struct tegra_clk_pll *pll = to_clk_pll(hw);
+ unsigned long flags = 0;
+ int ret;
+
+ if (pll->lock)
+ spin_lock_irqsave(pll->lock, flags);
+
+ ret = _clk_pll_enable(hw);
+
+ if (pll->lock)
+ spin_unlock_irqrestore(pll->lock, flags);
+
+ return ret;
+}
+
+static void clk_pll_disable(struct clk_hw *hw)
+{
+ struct tegra_clk_pll *pll = to_clk_pll(hw);
+ unsigned long flags = 0;
+
+ if (pll->lock)
+ spin_lock_irqsave(pll->lock, flags);
+
+ _clk_pll_disable(hw);
+
+ if (pll->lock)
+ spin_unlock_irqrestore(pll->lock, flags);
+}
+
+static int _get_table_rate(struct clk_hw *hw,
+ struct tegra_clk_pll_freq_table *cfg,
+ unsigned long rate, unsigned long parent_rate)
+{
+ struct tegra_clk_pll *pll = to_clk_pll(hw);
+ struct tegra_clk_pll_freq_table *sel;
+
+ for (sel = pll->freq_table; sel->input_rate != 0; sel++)
+ if (sel->input_rate == parent_rate &&
+ sel->output_rate == rate)
+ break;
+
+ if (sel->input_rate == 0)
+ return -EINVAL;
+
+ BUG_ON(sel->p < 1);
+
+ cfg->input_rate = sel->input_rate;
+ cfg->output_rate = sel->output_rate;
+ cfg->m = sel->m;
+ cfg->n = sel->n;
+ cfg->p = sel->p;
+ cfg->cpcon = sel->cpcon;
+
+ return 0;
+}
+
+static int _calc_rate(struct clk_hw *hw, struct tegra_clk_pll_freq_table *cfg,
+ unsigned long rate, unsigned long parent_rate)
+{
+ struct tegra_clk_pll *pll = to_clk_pll(hw);
+ unsigned long cfreq;
+ u32 p_div = 0;
+
+ switch (parent_rate) {
+ case 12000000:
+ case 26000000:
+ cfreq = (rate <= 1000000 * 1000) ? 1000000 : 2000000;
+ break;
+ case 13000000:
+ cfreq = (rate <= 1000000 * 1000) ? 1000000 : 2600000;
+ break;
+ case 16800000:
+ case 19200000:
+ cfreq = (rate <= 1200000 * 1000) ? 1200000 : 2400000;
+ break;
+ case 9600000:
+ case 28800000:
+ /*
+ * PLL_P_OUT1 rate is not listed in PLLA table
+ */
+ cfreq = parent_rate/(parent_rate/1000000);
+ break;
+ default:
+ pr_err("%s Unexpected reference rate %lu\n",
+ __func__, parent_rate);
+ BUG();
+ }
+
+ /* Raise VCO to guarantee 0.5% accuracy */
+ for (cfg->output_rate = rate; cfg->output_rate < 200 * cfreq;
+ cfg->output_rate <<= 1)
+ p_div++;
+
+ cfg->p = 1 << p_div;
+ cfg->m = parent_rate / cfreq;
+ cfg->n = cfg->output_rate / cfreq;
+ cfg->cpcon = OUT_OF_TABLE_CPCON;
+
+ if (cfg->m > divm_max(pll) || cfg->n > divn_max(pll) ||
+ cfg->p > divp_max(pll) || cfg->output_rate > pll->params->vco_max) {
+ pr_err("%s: Failed to set %s rate %lu\n",
+ __func__, __clk_get_name(hw->clk), rate);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int _program_pll(struct clk_hw *hw, struct tegra_clk_pll_freq_table *cfg,
+ unsigned long rate)
+{
+ struct tegra_clk_pll *pll = to_clk_pll(hw);
+ unsigned long flags = 0;
+ u32 divp, val, old_base;
+ int state;
+
+ divp = __ffs(cfg->p);
+
+ if (pll->flags & TEGRA_PLLU)
+ divp ^= 1;
+
+ if (pll->lock)
+ spin_lock_irqsave(pll->lock, flags);
+
+ old_base = val = pll_readl_base(pll);
+ val &= ~((divm_mask(pll) << pll->divm_shift) |
+ (divn_mask(pll) << pll->divn_shift) |
+ (divp_mask(pll) << pll->divp_shift));
+ val |= ((cfg->m << pll->divm_shift) |
+ (cfg->n << pll->divn_shift) |
+ (divp << pll->divp_shift));
+ if (val == old_base) {
+ if (pll->lock)
+ spin_unlock_irqrestore(pll->lock, flags);
+ return 0;
+ }
+
+ state = clk_pll_is_enabled(hw);
+
+ if (state) {
+ _clk_pll_disable(hw);
+ val &= ~(PLL_BASE_BYPASS | PLL_BASE_ENABLE);
+ }
+ pll_writel_base(val, pll);
+
+ if (pll->flags & TEGRA_PLL_HAS_CPCON) {
+ val = pll_readl_misc(pll);
+ val &= ~(PLL_MISC_CPCON_MASK << PLL_MISC_CPCON_SHIFT);
+ val |= cfg->cpcon << PLL_MISC_CPCON_SHIFT;
+ if (pll->flags & TEGRA_PLL_SET_LFCON) {
+ val &= ~(PLL_MISC_LFCON_MASK << PLL_MISC_LFCON_SHIFT);
+ if (cfg->n >= PLLDU_LFCON_SET_DIVN)
+ val |= 0x1 << PLL_MISC_LFCON_SHIFT;
+ } else if (pll->flags & TEGRA_PLL_SET_DCCON) {
+ val &= ~(0x1 << PLL_MISC_DCCON_SHIFT);
+ if (rate >= (pll->params->vco_max >> 1))
+ val |= 0x1 << PLL_MISC_DCCON_SHIFT;
+ }
+ pll_writel_misc(val, pll);
+ }
+
+ if (pll->lock)
+ spin_unlock_irqrestore(pll->lock, flags);
+
+ if (state)
+ clk_pll_enable(hw);
+
+ return 0;
+}
+
+static int clk_pll_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct tegra_clk_pll *pll = to_clk_pll(hw);
+ struct tegra_clk_pll_freq_table cfg;
+
+ if (pll->flags & TEGRA_PLL_FIXED) {
+ if (rate != pll->fixed_rate) {
+ pr_err("%s: Can not change %s fixed rate %lu to %lu\n",
+ __func__, __clk_get_name(hw->clk),
+ pll->fixed_rate, rate);
+ return -EINVAL;
+ }
+ return 0;
+ }
+
+ if (_get_table_rate(hw, &cfg, rate, parent_rate) &&
+ _calc_rate(hw, &cfg, rate, parent_rate))
+ return -EINVAL;
+
+ return _program_pll(hw, &cfg, rate);
+}
+
+static long clk_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *prate)
+{
+ struct tegra_clk_pll *pll = to_clk_pll(hw);
+ struct tegra_clk_pll_freq_table cfg;
+ u64 output_rate = *prate;
+
+ if (pll->flags & TEGRA_PLL_FIXED)
+ return pll->fixed_rate;
+
+ /* PLLM is used for memory; we do not change rate */
+ if (pll->flags & TEGRA_PLLM)
+ return __clk_get_rate(hw->clk);
+
+ if (_get_table_rate(hw, &cfg, rate, *prate) &&
+ _calc_rate(hw, &cfg, rate, *prate))
+ return -EINVAL;
+
+ output_rate *= cfg.n;
+ do_div(output_rate, cfg.m * cfg.p);
+
+ return output_rate;
+}
+
+static unsigned long clk_pll_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct tegra_clk_pll *pll = to_clk_pll(hw);
+ u32 val = pll_readl_base(pll);
+ u32 divn = 0, divm = 0, divp = 0;
+ u64 rate = parent_rate;
+
+ if (val & PLL_BASE_BYPASS)
+ return parent_rate;
+
+ if ((pll->flags & TEGRA_PLL_FIXED) && !(val & PLL_BASE_OVERRIDE)) {
+ struct tegra_clk_pll_freq_table sel;
+ if (_get_table_rate(hw, &sel, pll->fixed_rate, parent_rate)) {
+ pr_err("Clock %s has unknown fixed frequency\n",
+ __clk_get_name(hw->clk));
+ BUG();
+ }
+ return pll->fixed_rate;
+ }
+
+ divp = (val >> pll->divp_shift) & (divp_mask(pll));
+ if (pll->flags & TEGRA_PLLU)
+ divp ^= 1;
+
+ divn = (val >> pll->divn_shift) & (divn_mask(pll));
+ divm = (val >> pll->divm_shift) & (divm_mask(pll));
+ divm *= (1 << divp);
+
+ rate *= divn;
+ do_div(rate, divm);
+ return rate;
+}
+
+static int clk_plle_training(struct tegra_clk_pll *pll)
+{
+ u32 val;
+ unsigned long timeout;
+
+ if (!pll->pmc)
+ return -ENOSYS;
+
+ /*
+ * PLLE is already disabled, and setup cleared;
+ * create falling edge on PLLE IDDQ input.
+ */
+ val = readl(pll->pmc + PMC_SATA_PWRGT);
+ val |= PMC_SATA_PWRGT_PLLE_IDDQ_VALUE;
+ writel(val, pll->pmc + PMC_SATA_PWRGT);
+
+ val = readl(pll->pmc + PMC_SATA_PWRGT);
+ val |= PMC_SATA_PWRGT_PLLE_IDDQ_SWCTL;
+ writel(val, pll->pmc + PMC_SATA_PWRGT);
+
+ val = readl(pll->pmc + PMC_SATA_PWRGT);
+ val &= ~PMC_SATA_PWRGT_PLLE_IDDQ_VALUE;
+ writel(val, pll->pmc + PMC_SATA_PWRGT);
+
+ val = pll_readl_misc(pll);
+
+ timeout = jiffies + msecs_to_jiffies(100);
+ while (1) {
+ val = pll_readl_misc(pll);
+ if (val & PLLE_MISC_READY)
+ break;
+ if (time_after(jiffies, timeout)) {
+ pr_err("%s: timeout waiting for PLLE\n", __func__);
+ return -EBUSY;
+ }
+ udelay(300);
+ }
+
+ return 0;
+}
+
+static int clk_plle_enable(struct clk_hw *hw)
+{
+ struct tegra_clk_pll *pll = to_clk_pll(hw);
+ unsigned long input_rate = clk_get_rate(clk_get_parent(hw->clk));
+ struct tegra_clk_pll_freq_table sel;
+ u32 val;
+ int err;
+
+ if (_get_table_rate(hw, &sel, pll->fixed_rate, input_rate))
+ return -EINVAL;
+
+ clk_pll_disable(hw);
+
+ val = pll_readl_misc(pll);
+ val &= ~(PLLE_MISC_LOCK_ENABLE | PLLE_MISC_SETUP_MASK);
+ pll_writel_misc(val, pll);
+
+ val = pll_readl_misc(pll);
+ if (!(val & PLLE_MISC_READY)) {
+ err = clk_plle_training(pll);
+ if (err)
+ return err;
+ }
+
+ if (pll->flags & TEGRA_PLLE_CONFIGURE) {
+ /* configure dividers */
+ val = pll_readl_base(pll);
+ val &= ~(divm_mask(pll) | divn_mask(pll) | divp_mask(pll));
+ val &= ~(PLLE_BASE_DIVCML_WIDTH << PLLE_BASE_DIVCML_SHIFT);
+ val |= sel.m << pll->divm_shift;
+ val |= sel.n << pll->divn_shift;
+ val |= sel.p << pll->divp_shift;
+ val |= sel.cpcon << PLLE_BASE_DIVCML_SHIFT;
+ pll_writel_base(val, pll);
+ }
+
+ val = pll_readl_misc(pll);
+ val |= PLLE_MISC_SETUP_VALUE;
+ val |= PLLE_MISC_LOCK_ENABLE;
+ pll_writel_misc(val, pll);
+
+ val = readl(pll->clk_base + PLLE_SS_CTRL);
+ val |= PLLE_SS_DISABLE;
+ writel(val, pll->clk_base + PLLE_SS_CTRL);
+
+ val |= pll_readl_base(pll);
+ val |= (PLL_BASE_BYPASS | PLL_BASE_ENABLE);
+ pll_writel_base(val, pll);
+
+ clk_pll_wait_for_lock(pll, pll->clk_base + pll->params->misc_reg,
+ pll->params->lock_bit_idx);
+ return 0;
+}
+
+static unsigned long clk_plle_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct tegra_clk_pll *pll = to_clk_pll(hw);
+ u32 val = pll_readl_base(pll);
+ u32 divn = 0, divm = 0, divp = 0;
+ u64 rate = parent_rate;
+
+ divp = (val >> pll->divp_shift) & (divp_mask(pll));
+ divn = (val >> pll->divn_shift) & (divn_mask(pll));
+ divm = (val >> pll->divm_shift) & (divm_mask(pll));
+ divm *= divp;
+
+ rate *= divn;
+ do_div(rate, divm);
+ return rate;
+}
+
+const struct clk_ops tegra_clk_pll_ops = {
+ .is_enabled = clk_pll_is_enabled,
+ .enable = clk_pll_enable,
+ .disable = clk_pll_disable,
+ .recalc_rate = clk_pll_recalc_rate,
+ .round_rate = clk_pll_round_rate,
+ .set_rate = clk_pll_set_rate,
+};
+
+const struct clk_ops tegra_clk_plle_ops = {
+ .recalc_rate = clk_plle_recalc_rate,
+ .is_enabled = clk_pll_is_enabled,
+ .disable = clk_pll_disable,
+ .enable = clk_plle_enable,
+};
+
+static struct clk *_tegra_clk_register_pll(const char *name,
+ const char *parent_name, void __iomem *clk_base,
+ void __iomem *pmc, unsigned long flags,
+ unsigned long fixed_rate,
+ struct tegra_clk_pll_params *pll_params, u8 pll_flags,
+ struct tegra_clk_pll_freq_table *freq_table, spinlock_t *lock,
+ const struct clk_ops *ops)
+{
+ struct tegra_clk_pll *pll;
+ struct clk *clk;
+ struct clk_init_data init;
+
+ pll = kzalloc(sizeof(*pll), GFP_KERNEL);
+ if (!pll)
+ return ERR_PTR(-ENOMEM);
+
+ init.name = name;
+ init.ops = ops;
+ init.flags = flags;
+ init.parent_names = (parent_name ? &parent_name : NULL);
+ init.num_parents = (parent_name ? 1 : 0);
+
+ pll->clk_base = clk_base;
+ pll->pmc = pmc;
+
+ pll->freq_table = freq_table;
+ pll->params = pll_params;
+ pll->fixed_rate = fixed_rate;
+ pll->flags = pll_flags;
+ pll->lock = lock;
+
+ pll->divp_shift = PLL_BASE_DIVP_SHIFT;
+ pll->divp_width = PLL_BASE_DIVP_WIDTH;
+ pll->divn_shift = PLL_BASE_DIVN_SHIFT;
+ pll->divn_width = PLL_BASE_DIVN_WIDTH;
+ pll->divm_shift = PLL_BASE_DIVM_SHIFT;
+ pll->divm_width = PLL_BASE_DIVM_WIDTH;
+
+ /* Data in .init is copied by clk_register(), so stack variable OK */
+ pll->hw.init = &init;
+
+ clk = clk_register(NULL, &pll->hw);
+ if (IS_ERR(clk))
+ kfree(pll);
+
+ return clk;
+}
+
+struct clk *tegra_clk_register_pll(const char *name, const char *parent_name,
+ void __iomem *clk_base, void __iomem *pmc,
+ unsigned long flags, unsigned long fixed_rate,
+ struct tegra_clk_pll_params *pll_params, u8 pll_flags,
+ struct tegra_clk_pll_freq_table *freq_table, spinlock_t *lock)
+{
+ return _tegra_clk_register_pll(name, parent_name, clk_base, pmc,
+ flags, fixed_rate, pll_params, pll_flags, freq_table,
+ lock, &tegra_clk_pll_ops);
+}
+
+struct clk *tegra_clk_register_plle(const char *name, const char *parent_name,
+ void __iomem *clk_base, void __iomem *pmc,
+ unsigned long flags, unsigned long fixed_rate,
+ struct tegra_clk_pll_params *pll_params, u8 pll_flags,
+ struct tegra_clk_pll_freq_table *freq_table, spinlock_t *lock)
+{
+ return _tegra_clk_register_pll(name, parent_name, clk_base, pmc,
+ flags, fixed_rate, pll_params, pll_flags, freq_table,
+ lock, &tegra_clk_plle_ops);
+}
--- /dev/null
+/*
+ * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/kernel.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/clk-provider.h>
+#include <linux/clk.h>
+
+#include "clk.h"
+
+#define SUPER_STATE_IDLE 0
+#define SUPER_STATE_RUN 1
+#define SUPER_STATE_IRQ 2
+#define SUPER_STATE_FIQ 3
+
+#define SUPER_STATE_SHIFT 28
+#define SUPER_STATE_MASK ((BIT(SUPER_STATE_IDLE) | BIT(SUPER_STATE_RUN) | \
+ BIT(SUPER_STATE_IRQ) | BIT(SUPER_STATE_FIQ)) \
+ << SUPER_STATE_SHIFT)
+
+#define SUPER_LP_DIV2_BYPASS (1 << 16)
+
+#define super_state(s) (BIT(s) << SUPER_STATE_SHIFT)
+#define super_state_to_src_shift(m, s) ((m->width * s))
+#define super_state_to_src_mask(m) (((1 << m->width) - 1))
+
+static u8 clk_super_get_parent(struct clk_hw *hw)
+{
+ struct tegra_clk_super_mux *mux = to_clk_super_mux(hw);
+ u32 val, state;
+ u8 source, shift;
+
+ val = readl_relaxed(mux->reg);
+
+ state = val & SUPER_STATE_MASK;
+
+ BUG_ON((state != super_state(SUPER_STATE_RUN)) &&
+ (state != super_state(SUPER_STATE_IDLE)));
+ shift = (state == super_state(SUPER_STATE_IDLE)) ?
+ super_state_to_src_shift(mux, SUPER_STATE_IDLE) :
+ super_state_to_src_shift(mux, SUPER_STATE_RUN);
+
+ source = (val >> shift) & super_state_to_src_mask(mux);
+
+ /*
+ * If LP_DIV2_BYPASS is not set and PLLX is current parent then
+ * PLLX/2 is the input source to CCLKLP.
+ */
+ if ((mux->flags & TEGRA_DIVIDER_2) && !(val & SUPER_LP_DIV2_BYPASS) &&
+ (source == mux->pllx_index))
+ source = mux->div2_index;
+
+ return source;
+}
+
+static int clk_super_set_parent(struct clk_hw *hw, u8 index)
+{
+ struct tegra_clk_super_mux *mux = to_clk_super_mux(hw);
+ u32 val, state;
+ u8 parent_index, shift;
+
+ val = readl_relaxed(mux->reg);
+ state = val & SUPER_STATE_MASK;
+ BUG_ON((state != super_state(SUPER_STATE_RUN)) &&
+ (state != super_state(SUPER_STATE_IDLE)));
+ shift = (state == super_state(SUPER_STATE_IDLE)) ?
+ super_state_to_src_shift(mux, SUPER_STATE_IDLE) :
+ super_state_to_src_shift(mux, SUPER_STATE_RUN);
+
+ /*
+ * For LP mode super-clock switch between PLLX direct
+ * and divided-by-2 outputs is allowed only when other
+ * than PLLX clock source is current parent.
+ */
+ if ((mux->flags & TEGRA_DIVIDER_2) && ((index == mux->div2_index) ||
+ (index == mux->pllx_index))) {
+ parent_index = clk_super_get_parent(hw);
+ if ((parent_index == mux->div2_index) ||
+ (parent_index == mux->pllx_index))
+ return -EINVAL;
+
+ val ^= SUPER_LP_DIV2_BYPASS;
+ writel_relaxed(val, mux->reg);
+ udelay(2);
+
+ if (index == mux->div2_index)
+ index = mux->pllx_index;
+ }
+ val &= ~((super_state_to_src_mask(mux)) << shift);
+ val |= (index & (super_state_to_src_mask(mux))) << shift;
+
+ writel_relaxed(val, mux->reg);
+ udelay(2);
+ return 0;
+}
+
+const struct clk_ops tegra_clk_super_ops = {
+ .get_parent = clk_super_get_parent,
+ .set_parent = clk_super_set_parent,
+};
+
+struct clk *tegra_clk_register_super_mux(const char *name,
+ const char **parent_names, u8 num_parents,
+ unsigned long flags, void __iomem *reg, u8 clk_super_flags,
+ u8 width, u8 pllx_index, u8 div2_index, spinlock_t *lock)
+{
+ struct tegra_clk_super_mux *super;
+ struct clk *clk;
+ struct clk_init_data init;
+
+ super = kzalloc(sizeof(*super), GFP_KERNEL);
+ if (!super) {
+ pr_err("%s: could not allocate super clk\n", __func__);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ init.name = name;
+ init.ops = &tegra_clk_super_ops;
+ init.flags = flags;
+ init.parent_names = parent_names;
+ init.num_parents = num_parents;
+
+ super->reg = reg;
+ super->pllx_index = pllx_index;
+ super->div2_index = div2_index;
+ super->lock = lock;
+ super->width = width;
+ super->flags = clk_super_flags;
+
+ /* Data in .init is copied by clk_register(), so stack variable OK */
+ super->hw.init = &init;
+
+ clk = clk_register(NULL, &super->hw);
+ if (IS_ERR(clk))
+ kfree(super);
+
+ return clk;
+}
--- /dev/null
+/*
+ * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+
+#include "clk.h"
+
+void __init tegra_init_dup_clks(struct tegra_clk_duplicate *dup_list,
+ struct clk *clks[], int clk_max)
+{
+ struct clk *clk;
+
+ for (; dup_list->clk_id < clk_max; dup_list++) {
+ clk = clks[dup_list->clk_id];
+ dup_list->lookup.clk = clk;
+ clkdev_add(&dup_list->lookup);
+ }
+}
+
+void __init tegra_init_from_table(struct tegra_clk_init_table *tbl,
+ struct clk *clks[], int clk_max)
+{
+ struct clk *clk;
+
+ for (; tbl->clk_id < clk_max; tbl++) {
+ clk = clks[tbl->clk_id];
+ if (IS_ERR_OR_NULL(clk))
+ return;
+
+ if (tbl->parent_id < clk_max) {
+ struct clk *parent = clks[tbl->parent_id];
+ if (clk_set_parent(clk, parent)) {
+ pr_err("%s: Failed to set parent %s of %s\n",
+ __func__, __clk_get_name(parent),
+ __clk_get_name(clk));
+ WARN_ON(1);
+ }
+ }
+
+ if (tbl->rate)
+ if (clk_set_rate(clk, tbl->rate)) {
+ pr_err("%s: Failed to set rate %lu of %s\n",
+ __func__, tbl->rate,
+ __clk_get_name(clk));
+ WARN_ON(1);
+ }
+
+ if (tbl->state)
+ if (clk_prepare_enable(clk)) {
+ pr_err("%s: Failed to enable %s\n", __func__,
+ __clk_get_name(clk));
+ WARN_ON(1);
+ }
+ }
+}
--- /dev/null
+/*
+ * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __TEGRA_CLK_H
+#define __TEGRA_CLK_H
+
+#include <linux/clk-provider.h>
+#include <linux/clkdev.h>
+
+/**
+ * struct tegra_clk_sync_source - external clock source from codec
+ *
+ * @hw: handle between common and hardware-specific interfaces
+ * @rate: input frequency from source
+ * @max_rate: max rate allowed
+ */
+struct tegra_clk_sync_source {
+ struct clk_hw hw;
+ unsigned long rate;
+ unsigned long max_rate;
+};
+
+#define to_clk_sync_source(_hw) \
+ container_of(_hw, struct tegra_clk_sync_source, hw)
+
+extern const struct clk_ops tegra_clk_sync_source_ops;
+struct clk *tegra_clk_register_sync_source(const char *name,
+ unsigned long fixed_rate, unsigned long max_rate);
+
+/**
+ * struct tegra_clk_frac_div - fractional divider clock
+ *
+ * @hw: handle between common and hardware-specific interfaces
+ * @reg: register containing divider
+ * @flags: hardware-specific flags
+ * @shift: shift to the divider bit field
+ * @width: width of the divider bit field
+ * @frac_width: width of the fractional bit field
+ * @lock: register lock
+ *
+ * Flags:
+ * TEGRA_DIVIDER_ROUND_UP - This flags indicates to round up the divider value.
+ * TEGRA_DIVIDER_FIXED - Fixed rate PLL dividers has addition override bit, this
+ * flag indicates that this divider is for fixed rate PLL.
+ * TEGRA_DIVIDER_INT - Some modules can not cope with the duty cycle when
+ * fraction bit is set. This flags indicates to calculate divider for which
+ * fracton bit will be zero.
+ * TEGRA_DIVIDER_UART - UART module divider has additional enable bit which is
+ * set when divider value is not 0. This flags indicates that the divider
+ * is for UART module.
+ */
+struct tegra_clk_frac_div {
+ struct clk_hw hw;
+ void __iomem *reg;
+ u8 flags;
+ u8 shift;
+ u8 width;
+ u8 frac_width;
+ spinlock_t *lock;
+};
+
+#define to_clk_frac_div(_hw) container_of(_hw, struct tegra_clk_frac_div, hw)
+
+#define TEGRA_DIVIDER_ROUND_UP BIT(0)
+#define TEGRA_DIVIDER_FIXED BIT(1)
+#define TEGRA_DIVIDER_INT BIT(2)
+#define TEGRA_DIVIDER_UART BIT(3)
+
+extern const struct clk_ops tegra_clk_frac_div_ops;
+struct clk *tegra_clk_register_divider(const char *name,
+ const char *parent_name, void __iomem *reg,
+ unsigned long flags, u8 clk_divider_flags, u8 shift, u8 width,
+ u8 frac_width, spinlock_t *lock);
+
+/*
+ * Tegra PLL:
+ *
+ * In general, there are 3 requirements for each PLL
+ * that SW needs to be comply with.
+ * (1) Input frequency range (REF).
+ * (2) Comparison frequency range (CF). CF = REF/DIVM.
+ * (3) VCO frequency range (VCO). VCO = CF * DIVN.
+ *
+ * The final PLL output frequency (FO) = VCO >> DIVP.
+ */
+
+/**
+ * struct tegra_clk_pll_freq_table - PLL frequecy table
+ *
+ * @input_rate: input rate from source
+ * @output_rate: output rate from PLL for the input rate
+ * @n: feedback divider
+ * @m: input divider
+ * @p: post divider
+ * @cpcon: charge pump current
+ */
+struct tegra_clk_pll_freq_table {
+ unsigned long input_rate;
+ unsigned long output_rate;
+ u16 n;
+ u16 m;
+ u8 p;
+ u8 cpcon;
+};
+
+/**
+ * struct clk_pll_params - PLL parameters
+ *
+ * @input_min: Minimum input frequency
+ * @input_max: Maximum input frequency
+ * @cf_min: Minimum comparison frequency
+ * @cf_max: Maximum comparison frequency
+ * @vco_min: Minimum VCO frequency
+ * @vco_max: Maximum VCO frequency
+ * @base_reg: PLL base reg offset
+ * @misc_reg: PLL misc reg offset
+ * @lock_reg: PLL lock reg offset
+ * @lock_bit_idx: Bit index for PLL lock status
+ * @lock_enable_bit_idx: Bit index to enable PLL lock
+ * @lock_delay: Delay in us if PLL lock is not used
+ */
+struct tegra_clk_pll_params {
+ unsigned long input_min;
+ unsigned long input_max;
+ unsigned long cf_min;
+ unsigned long cf_max;
+ unsigned long vco_min;
+ unsigned long vco_max;
+
+ u32 base_reg;
+ u32 misc_reg;
+ u32 lock_reg;
+ u32 lock_bit_idx;
+ u32 lock_enable_bit_idx;
+ int lock_delay;
+};
+
+/**
+ * struct tegra_clk_pll - Tegra PLL clock
+ *
+ * @hw: handle between common and hardware-specifix interfaces
+ * @clk_base: address of CAR controller
+ * @pmc: address of PMC, required to read override bits
+ * @freq_table: array of frequencies supported by PLL
+ * @params: PLL parameters
+ * @flags: PLL flags
+ * @fixed_rate: PLL rate if it is fixed
+ * @lock: register lock
+ * @divn_shift: shift to the feedback divider bit field
+ * @divn_width: width of the feedback divider bit field
+ * @divm_shift: shift to the input divider bit field
+ * @divm_width: width of the input divider bit field
+ * @divp_shift: shift to the post divider bit field
+ * @divp_width: width of the post divider bit field
+ *
+ * Flags:
+ * TEGRA_PLL_USE_LOCK - This flag indicated to use lock bits for
+ * PLL locking. If not set it will use lock_delay value to wait.
+ * TEGRA_PLL_HAS_CPCON - This flag indicates that CPCON value needs
+ * to be programmed to change output frequency of the PLL.
+ * TEGRA_PLL_SET_LFCON - This flag indicates that LFCON value needs
+ * to be programmed to change output frequency of the PLL.
+ * TEGRA_PLL_SET_DCCON - This flag indicates that DCCON value needs
+ * to be programmed to change output frequency of the PLL.
+ * TEGRA_PLLU - PLLU has inverted post divider. This flags indicated
+ * that it is PLLU and invert post divider value.
+ * TEGRA_PLLM - PLLM has additional override settings in PMC. This
+ * flag indicates that it is PLLM and use override settings.
+ * TEGRA_PLL_FIXED - We are not supposed to change output frequency
+ * of some plls.
+ * TEGRA_PLLE_CONFIGURE - Configure PLLE when enabling.
+ */
+struct tegra_clk_pll {
+ struct clk_hw hw;
+ void __iomem *clk_base;
+ void __iomem *pmc;
+ u8 flags;
+ unsigned long fixed_rate;
+ spinlock_t *lock;
+ u8 divn_shift;
+ u8 divn_width;
+ u8 divm_shift;
+ u8 divm_width;
+ u8 divp_shift;
+ u8 divp_width;
+ struct tegra_clk_pll_freq_table *freq_table;
+ struct tegra_clk_pll_params *params;
+};
+
+#define to_clk_pll(_hw) container_of(_hw, struct tegra_clk_pll, hw)
+
+#define TEGRA_PLL_USE_LOCK BIT(0)
+#define TEGRA_PLL_HAS_CPCON BIT(1)
+#define TEGRA_PLL_SET_LFCON BIT(2)
+#define TEGRA_PLL_SET_DCCON BIT(3)
+#define TEGRA_PLLU BIT(4)
+#define TEGRA_PLLM BIT(5)
+#define TEGRA_PLL_FIXED BIT(6)
+#define TEGRA_PLLE_CONFIGURE BIT(7)
+
+extern const struct clk_ops tegra_clk_pll_ops;
+extern const struct clk_ops tegra_clk_plle_ops;
+struct clk *tegra_clk_register_pll(const char *name, const char *parent_name,
+ void __iomem *clk_base, void __iomem *pmc,
+ unsigned long flags, unsigned long fixed_rate,
+ struct tegra_clk_pll_params *pll_params, u8 pll_flags,
+ struct tegra_clk_pll_freq_table *freq_table, spinlock_t *lock);
+struct clk *tegra_clk_register_plle(const char *name, const char *parent_name,
+ void __iomem *clk_base, void __iomem *pmc,
+ unsigned long flags, unsigned long fixed_rate,
+ struct tegra_clk_pll_params *pll_params, u8 pll_flags,
+ struct tegra_clk_pll_freq_table *freq_table, spinlock_t *lock);
+
+/**
+ * struct tegra_clk_pll_out - PLL divider down clock
+ *
+ * @hw: handle between common and hardware-specific interfaces
+ * @reg: register containing the PLL divider
+ * @enb_bit_idx: bit to enable/disable PLL divider
+ * @rst_bit_idx: bit to reset PLL divider
+ * @lock: register lock
+ * @flags: hardware-specific flags
+ */
+struct tegra_clk_pll_out {
+ struct clk_hw hw;
+ void __iomem *reg;
+ u8 enb_bit_idx;
+ u8 rst_bit_idx;
+ spinlock_t *lock;
+ u8 flags;
+};
+
+#define to_clk_pll_out(_hw) container_of(_hw, struct tegra_clk_pll_out, hw)
+
+extern const struct clk_ops tegra_clk_pll_out_ops;
+struct clk *tegra_clk_register_pll_out(const char *name,
+ const char *parent_name, void __iomem *reg, u8 enb_bit_idx,
+ u8 rst_bit_idx, unsigned long flags, u8 pll_div_flags,
+ spinlock_t *lock);
+
+/**
+ * struct tegra_clk_periph_regs - Registers controlling peripheral clock
+ *
+ * @enb_reg: read the enable status
+ * @enb_set_reg: write 1 to enable clock
+ * @enb_clr_reg: write 1 to disable clock
+ * @rst_reg: read the reset status
+ * @rst_set_reg: write 1 to assert the reset of peripheral
+ * @rst_clr_reg: write 1 to deassert the reset of peripheral
+ */
+struct tegra_clk_periph_regs {
+ u32 enb_reg;
+ u32 enb_set_reg;
+ u32 enb_clr_reg;
+ u32 rst_reg;
+ u32 rst_set_reg;
+ u32 rst_clr_reg;
+};
+
+/**
+ * struct tegra_clk_periph_gate - peripheral gate clock
+ *
+ * @magic: magic number to validate type
+ * @hw: handle between common and hardware-specific interfaces
+ * @clk_base: address of CAR controller
+ * @regs: Registers to control the peripheral
+ * @flags: hardware-specific flags
+ * @clk_num: Clock number
+ * @enable_refcnt: array to maintain reference count of the clock
+ *
+ * Flags:
+ * TEGRA_PERIPH_NO_RESET - This flag indicates that reset is not allowed
+ * for this module.
+ * TEGRA_PERIPH_MANUAL_RESET - This flag indicates not to reset module
+ * after clock enable and driver for the module is responsible for
+ * doing reset.
+ * TEGRA_PERIPH_ON_APB - If peripheral is in the APB bus then read the
+ * bus to flush the write operation in apb bus. This flag indicates
+ * that this peripheral is in apb bus.
+ */
+struct tegra_clk_periph_gate {
+ u32 magic;
+ struct clk_hw hw;
+ void __iomem *clk_base;
+ u8 flags;
+ int clk_num;
+ int *enable_refcnt;
+ struct tegra_clk_periph_regs *regs;
+};
+
+#define to_clk_periph_gate(_hw) \
+ container_of(_hw, struct tegra_clk_periph_gate, hw)
+
+#define TEGRA_CLK_PERIPH_GATE_MAGIC 0x17760309
+
+#define TEGRA_PERIPH_NO_RESET BIT(0)
+#define TEGRA_PERIPH_MANUAL_RESET BIT(1)
+#define TEGRA_PERIPH_ON_APB BIT(2)
+
+void tegra_periph_reset(struct tegra_clk_periph_gate *gate, bool assert);
+extern const struct clk_ops tegra_clk_periph_gate_ops;
+struct clk *tegra_clk_register_periph_gate(const char *name,
+ const char *parent_name, u8 gate_flags, void __iomem *clk_base,
+ unsigned long flags, int clk_num,
+ struct tegra_clk_periph_regs *pregs, int *enable_refcnt);
+
+/**
+ * struct clk-periph - peripheral clock
+ *
+ * @magic: magic number to validate type
+ * @hw: handle between common and hardware-specific interfaces
+ * @mux: mux clock
+ * @divider: divider clock
+ * @gate: gate clock
+ * @mux_ops: mux clock ops
+ * @div_ops: divider clock ops
+ * @gate_ops: gate clock ops
+ */
+struct tegra_clk_periph {
+ u32 magic;
+ struct clk_hw hw;
+ struct clk_mux mux;
+ struct tegra_clk_frac_div divider;
+ struct tegra_clk_periph_gate gate;
+
+ const struct clk_ops *mux_ops;
+ const struct clk_ops *div_ops;
+ const struct clk_ops *gate_ops;
+};
+
+#define to_clk_periph(_hw) container_of(_hw, struct tegra_clk_periph, hw)
+
+#define TEGRA_CLK_PERIPH_MAGIC 0x18221223
+
+extern const struct clk_ops tegra_clk_periph_ops;
+struct clk *tegra_clk_register_periph(const char *name,
+ const char **parent_names, int num_parents,
+ struct tegra_clk_periph *periph, void __iomem *clk_base,
+ u32 offset);
+struct clk *tegra_clk_register_periph_nodiv(const char *name,
+ const char **parent_names, int num_parents,
+ struct tegra_clk_periph *periph, void __iomem *clk_base,
+ u32 offset);
+
+#define TEGRA_CLK_PERIPH(_mux_shift, _mux_width, _mux_flags, \
+ _div_shift, _div_width, _div_frac_width, \
+ _div_flags, _clk_num, _enb_refcnt, _regs, \
+ _gate_flags) \
+ { \
+ .mux = { \
+ .flags = _mux_flags, \
+ .shift = _mux_shift, \
+ .width = _mux_width, \
+ }, \
+ .divider = { \
+ .flags = _div_flags, \
+ .shift = _div_shift, \
+ .width = _div_width, \
+ .frac_width = _div_frac_width, \
+ }, \
+ .gate = { \
+ .flags = _gate_flags, \
+ .clk_num = _clk_num, \
+ .enable_refcnt = _enb_refcnt, \
+ .regs = _regs, \
+ }, \
+ .mux_ops = &clk_mux_ops, \
+ .div_ops = &tegra_clk_frac_div_ops, \
+ .gate_ops = &tegra_clk_periph_gate_ops, \
+ }
+
+struct tegra_periph_init_data {
+ const char *name;
+ int clk_id;
+ const char **parent_names;
+ int num_parents;
+ struct tegra_clk_periph periph;
+ u32 offset;
+ const char *con_id;
+ const char *dev_id;
+};
+
+#define TEGRA_INIT_DATA(_name, _con_id, _dev_id, _parent_names, _offset, \
+ _mux_shift, _mux_width, _mux_flags, _div_shift, \
+ _div_width, _div_frac_width, _div_flags, _regs, \
+ _clk_num, _enb_refcnt, _gate_flags, _clk_id) \
+ { \
+ .name = _name, \
+ .clk_id = _clk_id, \
+ .parent_names = _parent_names, \
+ .num_parents = ARRAY_SIZE(_parent_names), \
+ .periph = TEGRA_CLK_PERIPH(_mux_shift, _mux_width, \
+ _mux_flags, _div_shift, \
+ _div_width, _div_frac_width, \
+ _div_flags, _clk_num, \
+ _enb_refcnt, _regs, \
+ _gate_flags), \
+ .offset = _offset, \
+ .con_id = _con_id, \
+ .dev_id = _dev_id, \
+ }
+
+/**
+ * struct clk_super_mux - super clock
+ *
+ * @hw: handle between common and hardware-specific interfaces
+ * @reg: register controlling multiplexer
+ * @width: width of the multiplexer bit field
+ * @flags: hardware-specific flags
+ * @div2_index: bit controlling divide-by-2
+ * @pllx_index: PLLX index in the parent list
+ * @lock: register lock
+ *
+ * Flags:
+ * TEGRA_DIVIDER_2 - LP cluster has additional divider. This flag indicates
+ * that this is LP cluster clock.
+ */
+struct tegra_clk_super_mux {
+ struct clk_hw hw;
+ void __iomem *reg;
+ u8 width;
+ u8 flags;
+ u8 div2_index;
+ u8 pllx_index;
+ spinlock_t *lock;
+};
+
+#define to_clk_super_mux(_hw) container_of(_hw, struct tegra_clk_super_mux, hw)
+
+#define TEGRA_DIVIDER_2 BIT(0)
+
+extern const struct clk_ops tegra_clk_super_ops;
+struct clk *tegra_clk_register_super_mux(const char *name,
+ const char **parent_names, u8 num_parents,
+ unsigned long flags, void __iomem *reg, u8 clk_super_flags,
+ u8 width, u8 pllx_index, u8 div2_index, spinlock_t *lock);
+
+/**
+ * struct clk_init_tabel - clock initialization table
+ * @clk_id: clock id as mentioned in device tree bindings
+ * @parent_id: parent clock id as mentioned in device tree bindings
+ * @rate: rate to set
+ * @state: enable/disable
+ */
+struct tegra_clk_init_table {
+ unsigned int clk_id;
+ unsigned int parent_id;
+ unsigned long rate;
+ int state;
+};
+
+/**
+ * struct clk_duplicate - duplicate clocks
+ * @clk_id: clock id as mentioned in device tree bindings
+ * @lookup: duplicate lookup entry for the clock
+ */
+struct tegra_clk_duplicate {
+ int clk_id;
+ struct clk_lookup lookup;
+};
+
+#define TEGRA_CLK_DUPLICATE(_clk_id, _dev, _con) \
+ { \
+ .clk_id = _clk_id, \
+ .lookup = { \
+ .dev_id = _dev, \
+ .con_id = _con, \
+ }, \
+ }
+
+void tegra_init_from_table(struct tegra_clk_init_table *tbl,
+ struct clk *clks[], int clk_max);
+
+void tegra_init_dup_clks(struct tegra_clk_duplicate *dup_list,
+ struct clk *clks[], int clk_max);
+
+#endif /* TEGRA_CLK_H */
projects / profile / ivi / kernel-adaptation-intel-automotive.git / commitdiff