clk: add BCM63XX gated clock controller driver

Add a driver for the gated clock controller found on MIPS based BCM63XX
SoCs.

Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
[sboyd@kernel.org: Remove module.h include and associated things for a
non-modular driver, add static on data tables, drop of_match_ptr()
usage, fix spdx tag to be a C++ style comment]
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

diff --git a/drivers/clk/bcm/Kconfig b/drivers/clk/bcm/Kconfig
index 4c4bd85..144e724 100644 (file)
--- a/drivers/clk/bcm/Kconfig
+++ b/drivers/clk/bcm/Kconfig
@@ -7,6 +7,14 @@ config CLK_BCM_63XX
          Enable common clock framework support for Broadcom BCM63xx DSL SoCs
          based on the ARM architecture
 
+config CLK_BCM_63XX_GATE
+       bool "Broadcom BCM63xx gated clock support"
+       depends on BMIPS_GENERIC || COMPILE_TEST
+       default BMIPS_GENERIC
+       help
+         Enable common clock framework support for Broadcom BCM63xx DSL SoCs
+         based on the MIPS architecture
+
 config CLK_BCM_KONA
        bool "Broadcom Kona CCU clock support"
        depends on ARCH_BCM_MOBILE || COMPILE_TEST

diff --git a/drivers/clk/bcm/Makefile b/drivers/clk/bcm/Makefile
index 002661d..3d92549 100644 (file)
--- a/drivers/clk/bcm/Makefile
+++ b/drivers/clk/bcm/Makefile
@@ -1,5 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 obj-$(CONFIG_CLK_BCM_63XX)     += clk-bcm63xx.o
+obj-$(CONFIG_CLK_BCM_63XX_GATE)        += clk-bcm63xx-gate.o
 obj-$(CONFIG_CLK_BCM_KONA)     += clk-kona.o
 obj-$(CONFIG_CLK_BCM_KONA)     += clk-kona-setup.o
 obj-$(CONFIG_CLK_BCM_KONA)     += clk-bcm281xx.o

diff --git a/drivers/clk/bcm/clk-bcm63xx-gate.c b/drivers/clk/bcm/clk-bcm63xx-gate.c
new file mode 100644 (file)
index 0000000..9e1dcd4
--- /dev/null
+++ b/drivers/clk/bcm/clk-bcm63xx-gate.c
@@ -0,0 +1,238 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/clk-provider.h>
+#include <linux/init.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+
+struct clk_bcm63xx_table_entry {
+       const char * const name;
+       u8 bit;
+       unsigned long flags;
+};
+
+struct clk_bcm63xx_hw {
+       void __iomem *regs;
+       spinlock_t lock;
+
+       struct clk_hw_onecell_data data;
+};
+
+static const struct clk_bcm63xx_table_entry bcm3368_clocks[] = {
+       { .name = "mac", .bit = 3, },
+       { .name = "tc", .bit = 5, },
+       { .name = "us_top", .bit = 6, },
+       { .name = "ds_top", .bit = 7, },
+       { .name = "acm", .bit = 8, },
+       { .name = "spi", .bit = 9, },
+       { .name = "usbs", .bit = 10, },
+       { .name = "bmu", .bit = 11, },
+       { .name = "pcm", .bit = 12, },
+       { .name = "ntp", .bit = 13, },
+       { .name = "acp_b", .bit = 14, },
+       { .name = "acp_a", .bit = 15, },
+       { .name = "emusb", .bit = 17, },
+       { .name = "enet0", .bit = 18, },
+       { .name = "enet1", .bit = 19, },
+       { .name = "usbsu", .bit = 20, },
+       { .name = "ephy", .bit = 21, },
+       { },
+};
+
+static const struct clk_bcm63xx_table_entry bcm6328_clocks[] = {
+       { .name = "phy_mips", .bit = 0, },
+       { .name = "adsl_qproc", .bit = 1, },
+       { .name = "adsl_afe", .bit = 2, },
+       { .name = "adsl", .bit = 3, },
+       { .name = "mips", .bit = 4, .flags = CLK_IS_CRITICAL, },
+       { .name = "sar", .bit = 5, },
+       { .name = "pcm", .bit = 6, },
+       { .name = "usbd", .bit = 7, },
+       { .name = "usbh", .bit = 8, },
+       { .name = "hsspi", .bit = 9, },
+       { .name = "pcie", .bit = 10, },
+       { .name = "robosw", .bit = 11, },
+       { },
+};
+
+static const struct clk_bcm63xx_table_entry bcm6358_clocks[] = {
+       { .name = "enet", .bit = 4, },
+       { .name = "adslphy", .bit = 5, },
+       { .name = "pcm", .bit = 8, },
+       { .name = "spi", .bit = 9, },
+       { .name = "usbs", .bit = 10, },
+       { .name = "sar", .bit = 11, },
+       { .name = "emusb", .bit = 17, },
+       { .name = "enet0", .bit = 18, },
+       { .name = "enet1", .bit = 19, },
+       { .name = "usbsu", .bit = 20, },
+       { .name = "ephy", .bit = 21, },
+       { },
+};
+
+static const struct clk_bcm63xx_table_entry bcm6362_clocks[] = {
+       { .name = "adsl_qproc", .bit = 1, },
+       { .name = "adsl_afe", .bit = 2, },
+       { .name = "adsl", .bit = 3, },
+       { .name = "mips", .bit = 4, .flags = CLK_IS_CRITICAL, },
+       { .name = "wlan_ocp", .bit = 5, },
+       { .name = "swpkt_usb", .bit = 7, },
+       { .name = "swpkt_sar", .bit = 8, },
+       { .name = "sar", .bit = 9, },
+       { .name = "robosw", .bit = 10, },
+       { .name = "pcm", .bit = 11, },
+       { .name = "usbd", .bit = 12, },
+       { .name = "usbh", .bit = 13, },
+       { .name = "ipsec", .bit = 14, },
+       { .name = "spi", .bit = 15, },
+       { .name = "hsspi", .bit = 16, },
+       { .name = "pcie", .bit = 17, },
+       { .name = "fap", .bit = 18, },
+       { .name = "phymips", .bit = 19, },
+       { .name = "nand", .bit = 20, },
+       { },
+};
+
+static const struct clk_bcm63xx_table_entry bcm6368_clocks[] = {
+       { .name = "vdsl_qproc", .bit = 2, },
+       { .name = "vdsl_afe", .bit = 3, },
+       { .name = "vdsl_bonding", .bit = 4, },
+       { .name = "vdsl", .bit = 5, },
+       { .name = "phymips", .bit = 6, },
+       { .name = "swpkt_usb", .bit = 7, },
+       { .name = "swpkt_sar", .bit = 8, },
+       { .name = "spi", .bit = 9, },
+       { .name = "usbd", .bit = 10, },
+       { .name = "sar", .bit = 11, },
+       { .name = "robosw", .bit = 12, },
+       { .name = "utopia", .bit = 13, },
+       { .name = "pcm", .bit = 14, },
+       { .name = "usbh", .bit = 15, },
+       { .name = "disable_gless", .bit = 16, },
+       { .name = "nand", .bit = 17, },
+       { .name = "ipsec", .bit = 18, },
+       { },
+};
+
+static const struct clk_bcm63xx_table_entry bcm63268_clocks[] = {
+       { .name = "disable_gless", .bit = 0, },
+       { .name = "vdsl_qproc", .bit = 1, },
+       { .name = "vdsl_afe", .bit = 2, },
+       { .name = "vdsl", .bit = 3, },
+       { .name = "mips", .bit = 4, .flags = CLK_IS_CRITICAL, },
+       { .name = "wlan_ocp", .bit = 5, },
+       { .name = "dect", .bit = 6, },
+       { .name = "fap0", .bit = 7, },
+       { .name = "fap1", .bit = 8, },
+       { .name = "sar", .bit = 9, },
+       { .name = "robosw", .bit = 10, },
+       { .name = "pcm", .bit = 11, },
+       { .name = "usbd", .bit = 12, },
+       { .name = "usbh", .bit = 13, },
+       { .name = "ipsec", .bit = 14, },
+       { .name = "spi", .bit = 15, },
+       { .name = "hsspi", .bit = 16, },
+       { .name = "pcie", .bit = 17, },
+       { .name = "phymips", .bit = 18, },
+       { .name = "gmac", .bit = 19, },
+       { .name = "nand", .bit = 20, },
+       { .name = "tbus", .bit = 27, },
+       { .name = "robosw250", .bit = 31, },
+       { },
+};
+
+static int clk_bcm63xx_probe(struct platform_device *pdev)
+{
+       const struct clk_bcm63xx_table_entry *entry, *table;
+       struct clk_bcm63xx_hw *hw;
+       struct resource *r;
+       u8 maxbit = 0;
+       int i, ret;
+
+       table = of_device_get_match_data(&pdev->dev);
+       if (!table)
+               return -EINVAL;
+
+       for (entry = table; entry->name; entry++)
+               maxbit = max_t(u8, maxbit, entry->bit);
+
+       hw = devm_kzalloc(&pdev->dev, struct_size(hw, data.hws, maxbit),
+                         GFP_KERNEL);
+       if (!hw)
+               return -ENOMEM;
+
+       platform_set_drvdata(pdev, hw);
+
+       spin_lock_init(&hw->lock);
+
+       hw->data.num = maxbit;
+       for (i = 0; i < maxbit; i++)
+               hw->data.hws[i] = ERR_PTR(-ENODEV);
+
+       r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+       hw->regs = devm_ioremap_resource(&pdev->dev, r);
+       if (IS_ERR(hw->regs))
+               return PTR_ERR(hw->regs);
+
+       for (entry = table; entry->name; entry++) {
+               struct clk_hw *clk;
+
+               clk = clk_hw_register_gate(&pdev->dev, entry->name, NULL,
+                                          entry->flags, hw->regs, entry->bit,
+                                          CLK_GATE_BIG_ENDIAN, &hw->lock);
+               if (IS_ERR(clk)) {
+                       ret = PTR_ERR(clk);
+                       goto out_err;
+               }
+
+               hw->data.hws[entry->bit] = clk;
+       }
+
+       ret = of_clk_add_hw_provider(pdev->dev.of_node, of_clk_hw_onecell_get,
+                                    &hw->data);
+       if (!ret)
+               return 0;
+out_err:
+       for (i = 0; i < hw->data.num; i++) {
+               if (!IS_ERR(hw->data.hws[i]))
+                       clk_hw_unregister_gate(hw->data.hws[i]);
+       }
+
+       return ret;
+}
+
+static int clk_bcm63xx_remove(struct platform_device *pdev)
+{
+       struct clk_bcm63xx_hw *hw = platform_get_drvdata(pdev);
+       int i;
+
+       of_clk_del_provider(pdev->dev.of_node);
+
+       for (i = 0; i < hw->data.num; i++) {
+               if (!IS_ERR(hw->data.hws[i]))
+                       clk_hw_unregister_gate(hw->data.hws[i]);
+       }
+
+       return 0;
+}
+
+static const struct of_device_id clk_bcm63xx_dt_ids[] = {
+       { .compatible = "brcm,bcm3368-clocks", .data = &bcm3368_clocks, },
+       { .compatible = "brcm,bcm6328-clocks", .data = &bcm6328_clocks, },
+       { .compatible = "brcm,bcm6358-clocks", .data = &bcm6358_clocks, },
+       { .compatible = "brcm,bcm6362-clocks", .data = &bcm6362_clocks, },
+       { .compatible = "brcm,bcm6368-clocks", .data = &bcm6368_clocks, },
+       { .compatible = "brcm,bcm63268-clocks", .data = &bcm63268_clocks, },
+       { }
+};
+
+static struct platform_driver clk_bcm63xx = {
+       .probe = clk_bcm63xx_probe,
+       .remove = clk_bcm63xx_remove,
+       .driver = {
+               .name = "bcm63xx-clock",
+               .of_match_table = clk_bcm63xx_dt_ids,
+       },
+};
+builtin_platform_driver(clk_bcm63xx);