clk: imx: add i.MX8MN ccf driver
authorPeng Fan <peng.fan@nxp.com>
Mon, 16 Sep 2019 03:09:47 +0000 (03:09 +0000)
committerStefano Babic <sbabic@denx.de>
Tue, 5 Nov 2019 09:27:18 +0000 (10:27 +0100)
Add i.MX8MM ccf driver support.
Modifed from Linux Kernel 5.3.0-rc1, drop some entries
that not used in U-Boot and adapt to U-Boot CCF style.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Cc: Lukasz Majewski <lukma@denx.de>
drivers/clk/imx/Kconfig
drivers/clk/imx/Makefile
drivers/clk/imx/clk-imx8mn.c [new file with mode: 0644]

index aae69cf..0ba8bc9 100644 (file)
@@ -36,3 +36,19 @@ config CLK_IMX8MM
        select CLK_CCF
        help
          This enables support clock driver for i.MX8MM platforms.
+
+config SPL_CLK_IMX8MN
+       bool "SPL clock support for i.MX8MN"
+       depends on ARCH_IMX8M && SPL
+       select SPL_CLK
+       select SPL_CLK_CCF
+       help
+         This enables SPL DM/DTS support for clock driver in i.MX8MN
+
+config CLK_IMX8MN
+       bool "Clock support for i.MX8MN"
+       depends on ARCH_IMX8M
+       select CLK
+       select CLK_CCF
+       help
+         This enables support clock driver for i.MX8MN platforms.
index 5ad7967..222c5a4 100644 (file)
@@ -12,3 +12,5 @@ obj-$(CONFIG_IMX8QM) += clk-imx8qm.o
 endif
 obj-$(CONFIG_$(SPL_TPL_)CLK_IMX8MM) += clk-imx8mm.o clk-pll14xx.o \
                                clk-composite-8m.o
+obj-$(CONFIG_$(SPL_TPL_)CLK_IMX8MN) += clk-imx8mn.o clk-pll14xx.o \
+                               clk-composite-8m.o
diff --git a/drivers/clk/imx/clk-imx8mn.c b/drivers/clk/imx/clk-imx8mn.c
new file mode 100644 (file)
index 0000000..4048cc6
--- /dev/null
@@ -0,0 +1,415 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright 2019 NXP
+ * Peng Fan <peng.fan@nxp.com>
+ */
+
+#include <common.h>
+#include <clk.h>
+#include <clk-uclass.h>
+#include <dm.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/imx-regs.h>
+#include <dt-bindings/clock/imx8mn-clock.h>
+
+#include "clk.h"
+
+#define PLL_1416X_RATE(_rate, _m, _p, _s)              \
+       {                                               \
+               .rate   =       (_rate),                \
+               .mdiv   =       (_m),                   \
+               .pdiv   =       (_p),                   \
+               .sdiv   =       (_s),                   \
+       }
+
+#define PLL_1443X_RATE(_rate, _m, _p, _s, _k)          \
+       {                                               \
+               .rate   =       (_rate),                \
+               .mdiv   =       (_m),                   \
+               .pdiv   =       (_p),                   \
+               .sdiv   =       (_s),                   \
+               .kdiv   =       (_k),                   \
+       }
+
+static const struct imx_pll14xx_rate_table imx8mn_pll1416x_tbl[] = {
+       PLL_1416X_RATE(1800000000U, 225, 3, 0),
+       PLL_1416X_RATE(1600000000U, 200, 3, 0),
+       PLL_1416X_RATE(1200000000U, 300, 3, 1),
+       PLL_1416X_RATE(1000000000U, 250, 3, 1),
+       PLL_1416X_RATE(800000000U,  200, 3, 1),
+       PLL_1416X_RATE(750000000U,  250, 2, 2),
+       PLL_1416X_RATE(700000000U,  350, 3, 2),
+       PLL_1416X_RATE(600000000U,  300, 3, 2),
+};
+
+static const struct imx_pll14xx_rate_table imx8mn_drampll_tbl[] = {
+       PLL_1443X_RATE(650000000U, 325, 3, 2, 0),
+};
+
+static struct imx_pll14xx_clk imx8mn_dram_pll __initdata = {
+               .type = PLL_1443X,
+               .rate_table = imx8mn_drampll_tbl,
+               .rate_count = ARRAY_SIZE(imx8mn_drampll_tbl),
+};
+
+static struct imx_pll14xx_clk imx8mn_arm_pll __initdata = {
+               .type = PLL_1416X,
+               .rate_table = imx8mn_pll1416x_tbl,
+               .rate_count = ARRAY_SIZE(imx8mn_pll1416x_tbl),
+};
+
+static struct imx_pll14xx_clk imx8mn_sys_pll __initdata = {
+               .type = PLL_1416X,
+               .rate_table = imx8mn_pll1416x_tbl,
+               .rate_count = ARRAY_SIZE(imx8mn_pll1416x_tbl),
+};
+
+static const char *pll_ref_sels[] = { "clock-osc-24m", "dummy", "dummy", "dummy", };
+static const char *dram_pll_bypass_sels[] = {"dram_pll", "dram_pll_ref_sel", };
+static const char *arm_pll_bypass_sels[] = {"arm_pll", "arm_pll_ref_sel", };
+static const char *sys_pll1_bypass_sels[] = {"sys_pll1", "sys_pll1_ref_sel", };
+static const char *sys_pll2_bypass_sels[] = {"sys_pll2", "sys_pll2_ref_sel", };
+static const char *sys_pll3_bypass_sels[] = {"sys_pll3", "sys_pll3_ref_sel", };
+
+static const char *imx8mn_a53_sels[] = {"clock-osc-24m", "arm_pll_out", "sys_pll2_500m", "sys_pll2_1000m",
+                                       "sys_pll1_800m", "sys_pll1_400m", "audio_pll1_out", "sys_pll3_out", };
+
+static const char *imx8mn_ahb_sels[] = {"clock-osc-24m", "sys_pll1_133m", "sys_pll1_800m", "sys_pll1_400m",
+                                       "sys_pll2_125m", "sys_pll3_out", "audio_pll1_out", "video_pll1_out", };
+
+static const char *imx8mn_enet_axi_sels[] = {"clock-osc-24m", "sys_pll1_266m", "sys_pll1_800m", "sys_pll2_250m",
+                                            "sys_pll2_200m", "audio_pll1_out", "video_pll1_out", "sys_pll3_out", };
+
+static const char *imx8mn_nand_usdhc_sels[] = {"clock-osc-24m", "sys_pll1_266m", "sys_pll1_800m", "sys_pll2_200m",
+                                              "sys_pll1_133m", "sys_pll3_out", "sys_pll2_250m", "audio_pll1_out", };
+
+static const char *imx8mn_usdhc1_sels[] = {"clock-osc-24m", "sys_pll1_400m", "sys_pll1_800m", "sys_pll2_500m",
+                                          "sys_pll3_out", "sys_pll1_266m", "audio_pll2_out", "sys_pll1_100m", };
+
+static const char *imx8mn_usdhc2_sels[] = {"clock-osc-24m", "sys_pll1_400m", "sys_pll1_800m", "sys_pll2_500m",
+                                          "sys_pll3_out", "sys_pll1_266m", "audio_pll2_out", "sys_pll1_100m", };
+
+static const char *imx8mn_i2c1_sels[] = {"clock-osc-24m", "sys_pll1_160m", "sys_pll2_50m", "sys_pll3_out", "audio_pll1_out",
+                                        "video_pll1_out", "audio_pll2_out", "sys_pll1_133m", };
+
+static const char *imx8mn_i2c2_sels[] = {"clock-osc-24m", "sys_pll1_160m", "sys_pll2_50m", "sys_pll3_out", "audio_pll1_out",
+                                        "video_pll1_out", "audio_pll2_out", "sys_pll1_133m", };
+
+static const char *imx8mn_i2c3_sels[] = {"clock-osc-24m", "sys_pll1_160m", "sys_pll2_50m", "sys_pll3_out", "audio_pll1_out",
+                                        "video_pll1_out", "audio_pll2_out", "sys_pll1_133m", };
+
+static const char *imx8mn_i2c4_sels[] = {"clock-osc-24m", "sys_pll1_160m", "sys_pll2_50m", "sys_pll3_out", "audio_pll1_out",
+                                        "video_pll1_out", "audio_pll2_out", "sys_pll1_133m", };
+
+static const char *imx8mn_wdog_sels[] = {"clock-osc-24m", "sys_pll1_133m", "sys_pll1_160m", "vpu_pll_out",
+                                        "sys_pll2_125m", "sys_pll3_out", "sys_pll1_80m", "sys_pll2_166m", };
+
+static const char *imx8mn_usdhc3_sels[] = {"clock-osc-24m", "sys_pll1_400m", "sys_pll1_800m", "sys_pll2_500m",
+                                          "sys_pll3_out", "sys_pll1_266m", "audio_pll2_clk", "sys_pll1_100m", };
+
+static ulong imx8mn_clk_get_rate(struct clk *clk)
+{
+       struct clk *c;
+       int ret;
+
+       debug("%s(#%lu)\n", __func__, clk->id);
+
+       ret = clk_get_by_id(clk->id, &c);
+       if (ret)
+               return ret;
+
+       return clk_get_rate(c);
+}
+
+static ulong imx8mn_clk_set_rate(struct clk *clk, unsigned long rate)
+{
+       struct clk *c;
+       int ret;
+
+       debug("%s(#%lu), rate: %lu\n", __func__, clk->id, rate);
+
+       ret = clk_get_by_id(clk->id, &c);
+       if (ret)
+               return ret;
+
+       return clk_set_rate(c, rate);
+}
+
+static int __imx8mn_clk_enable(struct clk *clk, bool enable)
+{
+       struct clk *c;
+       int ret;
+
+       debug("%s(#%lu) en: %d\n", __func__, clk->id, enable);
+
+       ret = clk_get_by_id(clk->id, &c);
+       if (ret)
+               return ret;
+
+       if (enable)
+               ret = clk_enable(c);
+       else
+               ret = clk_disable(c);
+
+       return ret;
+}
+
+static int imx8mn_clk_disable(struct clk *clk)
+{
+       return __imx8mn_clk_enable(clk, 0);
+}
+
+static int imx8mn_clk_enable(struct clk *clk)
+{
+       return __imx8mn_clk_enable(clk, 1);
+}
+
+static struct clk_ops imx8mn_clk_ops = {
+       .set_rate = imx8mn_clk_set_rate,
+       .get_rate = imx8mn_clk_get_rate,
+       .enable = imx8mn_clk_enable,
+       .disable = imx8mn_clk_disable,
+};
+
+static int imx8mn_clk_probe(struct udevice *dev)
+{
+       void __iomem *base;
+
+       base = (void *)ANATOP_BASE_ADDR;
+
+       clk_dm(IMX8MN_DRAM_PLL_REF_SEL,
+              imx_clk_mux("dram_pll_ref_sel", base + 0x50, 0, 2,
+                          pll_ref_sels, ARRAY_SIZE(pll_ref_sels)));
+       clk_dm(IMX8MN_ARM_PLL_REF_SEL,
+              imx_clk_mux("arm_pll_ref_sel", base + 0x84, 0, 2,
+                          pll_ref_sels, ARRAY_SIZE(pll_ref_sels)));
+       clk_dm(IMX8MN_SYS_PLL1_REF_SEL,
+              imx_clk_mux("sys_pll1_ref_sel", base + 0x94, 0, 2,
+                          pll_ref_sels, ARRAY_SIZE(pll_ref_sels)));
+       clk_dm(IMX8MN_SYS_PLL2_REF_SEL,
+              imx_clk_mux("sys_pll2_ref_sel", base + 0x104, 0, 2,
+                          pll_ref_sels, ARRAY_SIZE(pll_ref_sels)));
+       clk_dm(IMX8MN_SYS_PLL3_REF_SEL,
+              imx_clk_mux("sys_pll3_ref_sel", base + 0x114, 0, 2,
+                          pll_ref_sels, ARRAY_SIZE(pll_ref_sels)));
+
+       clk_dm(IMX8MN_DRAM_PLL,
+              imx_clk_pll14xx("dram_pll", "dram_pll_ref_sel",
+                              base + 0x50, &imx8mn_dram_pll));
+       clk_dm(IMX8MN_ARM_PLL,
+              imx_clk_pll14xx("arm_pll", "arm_pll_ref_sel",
+                              base + 0x84, &imx8mn_arm_pll));
+       clk_dm(IMX8MN_SYS_PLL1,
+              imx_clk_pll14xx("sys_pll1", "sys_pll1_ref_sel",
+                              base + 0x94, &imx8mn_sys_pll));
+       clk_dm(IMX8MN_SYS_PLL2,
+              imx_clk_pll14xx("sys_pll2", "sys_pll2_ref_sel",
+                              base + 0x104, &imx8mn_sys_pll));
+       clk_dm(IMX8MN_SYS_PLL3,
+              imx_clk_pll14xx("sys_pll3", "sys_pll3_ref_sel",
+                              base + 0x114, &imx8mn_sys_pll));
+
+       /* PLL bypass out */
+       clk_dm(IMX8MN_DRAM_PLL_BYPASS,
+              imx_clk_mux_flags("dram_pll_bypass", base + 0x50, 4, 1,
+                                dram_pll_bypass_sels,
+                                ARRAY_SIZE(dram_pll_bypass_sels),
+                                CLK_SET_RATE_PARENT));
+       clk_dm(IMX8MN_ARM_PLL_BYPASS,
+              imx_clk_mux_flags("arm_pll_bypass", base + 0x84, 4, 1,
+                                arm_pll_bypass_sels,
+                                ARRAY_SIZE(arm_pll_bypass_sels),
+                                CLK_SET_RATE_PARENT));
+       clk_dm(IMX8MN_SYS_PLL1_BYPASS,
+              imx_clk_mux_flags("sys_pll1_bypass", base + 0x94, 4, 1,
+                                sys_pll1_bypass_sels,
+                                ARRAY_SIZE(sys_pll1_bypass_sels),
+                                CLK_SET_RATE_PARENT));
+       clk_dm(IMX8MN_SYS_PLL2_BYPASS,
+              imx_clk_mux_flags("sys_pll2_bypass", base + 0x104, 4, 1,
+                                sys_pll2_bypass_sels,
+                                ARRAY_SIZE(sys_pll2_bypass_sels),
+                                CLK_SET_RATE_PARENT));
+       clk_dm(IMX8MN_SYS_PLL3_BYPASS,
+              imx_clk_mux_flags("sys_pll3_bypass", base + 0x114, 4, 1,
+                                sys_pll3_bypass_sels,
+                                ARRAY_SIZE(sys_pll3_bypass_sels),
+                                CLK_SET_RATE_PARENT));
+
+       /* PLL out gate */
+       clk_dm(IMX8MN_DRAM_PLL_OUT,
+              imx_clk_gate("dram_pll_out", "dram_pll_bypass",
+                           base + 0x50, 13));
+       clk_dm(IMX8MN_ARM_PLL_OUT,
+              imx_clk_gate("arm_pll_out", "arm_pll_bypass",
+                           base + 0x84, 11));
+       clk_dm(IMX8MN_SYS_PLL1_OUT,
+              imx_clk_gate("sys_pll1_out", "sys_pll1_bypass",
+                           base + 0x94, 11));
+       clk_dm(IMX8MN_SYS_PLL2_OUT,
+              imx_clk_gate("sys_pll2_out", "sys_pll2_bypass",
+                           base + 0x104, 11));
+       clk_dm(IMX8MN_SYS_PLL3_OUT,
+              imx_clk_gate("sys_pll3_out", "sys_pll3_bypass",
+                           base + 0x114, 11));
+
+       /* SYS PLL fixed output */
+       clk_dm(IMX8MN_SYS_PLL1_40M,
+              imx_clk_fixed_factor("sys_pll1_40m", "sys_pll1_out", 1, 20));
+       clk_dm(IMX8MN_SYS_PLL1_80M,
+              imx_clk_fixed_factor("sys_pll1_80m", "sys_pll1_out", 1, 10));
+       clk_dm(IMX8MN_SYS_PLL1_100M,
+              imx_clk_fixed_factor("sys_pll1_100m", "sys_pll1_out", 1, 8));
+       clk_dm(IMX8MN_SYS_PLL1_133M,
+              imx_clk_fixed_factor("sys_pll1_133m", "sys_pll1_out", 1, 6));
+       clk_dm(IMX8MN_SYS_PLL1_160M,
+              imx_clk_fixed_factor("sys_pll1_160m", "sys_pll1_out", 1, 5));
+       clk_dm(IMX8MN_SYS_PLL1_200M,
+              imx_clk_fixed_factor("sys_pll1_200m", "sys_pll1_out", 1, 4));
+       clk_dm(IMX8MN_SYS_PLL1_266M,
+              imx_clk_fixed_factor("sys_pll1_266m", "sys_pll1_out", 1, 3));
+       clk_dm(IMX8MN_SYS_PLL1_400M,
+              imx_clk_fixed_factor("sys_pll1_400m", "sys_pll1_out", 1, 2));
+       clk_dm(IMX8MN_SYS_PLL1_800M,
+              imx_clk_fixed_factor("sys_pll1_800m", "sys_pll1_out", 1, 1));
+
+       clk_dm(IMX8MN_SYS_PLL2_50M,
+              imx_clk_fixed_factor("sys_pll2_50m", "sys_pll2_out", 1, 20));
+       clk_dm(IMX8MN_SYS_PLL2_100M,
+              imx_clk_fixed_factor("sys_pll2_100m", "sys_pll2_out", 1, 10));
+       clk_dm(IMX8MN_SYS_PLL2_125M,
+              imx_clk_fixed_factor("sys_pll2_125m", "sys_pll2_out", 1, 8));
+       clk_dm(IMX8MN_SYS_PLL2_166M,
+              imx_clk_fixed_factor("sys_pll2_166m", "sys_pll2_out", 1, 6));
+       clk_dm(IMX8MN_SYS_PLL2_200M,
+              imx_clk_fixed_factor("sys_pll2_200m", "sys_pll2_out", 1, 5));
+       clk_dm(IMX8MN_SYS_PLL2_250M,
+              imx_clk_fixed_factor("sys_pll2_250m", "sys_pll2_out", 1, 4));
+       clk_dm(IMX8MN_SYS_PLL2_333M,
+              imx_clk_fixed_factor("sys_pll2_333m", "sys_pll2_out", 1, 3));
+       clk_dm(IMX8MN_SYS_PLL2_500M,
+              imx_clk_fixed_factor("sys_pll2_500m", "sys_pll2_out", 1, 2));
+       clk_dm(IMX8MN_SYS_PLL2_1000M,
+              imx_clk_fixed_factor("sys_pll2_1000m", "sys_pll2_out", 1, 1));
+
+       base = dev_read_addr_ptr(dev);
+       if (base == (void *)FDT_ADDR_T_NONE)
+               return -EINVAL;
+
+       clk_dm(IMX8MN_CLK_A53_SRC,
+              imx_clk_mux2("arm_a53_src", base + 0x8000, 24, 3,
+                           imx8mn_a53_sels, ARRAY_SIZE(imx8mn_a53_sels)));
+       clk_dm(IMX8MN_CLK_A53_CG,
+              imx_clk_gate3("arm_a53_cg", "arm_a53_src", base + 0x8000, 28));
+       clk_dm(IMX8MN_CLK_A53_DIV,
+              imx_clk_divider2("arm_a53_div", "arm_a53_cg",
+                               base + 0x8000, 0, 3));
+
+       clk_dm(IMX8MN_CLK_AHB,
+              imx8m_clk_composite_critical("ahb", imx8mn_ahb_sels,
+                                           base + 0x9000));
+       clk_dm(IMX8MN_CLK_IPG_ROOT,
+              imx_clk_divider2("ipg_root", "ahb", base + 0x9080, 0, 1));
+
+       clk_dm(IMX8MN_CLK_ENET_AXI,
+              imx8m_clk_composite("enet_axi", imx8mn_enet_axi_sels,
+                                  base + 0x8880));
+       clk_dm(IMX8MN_CLK_NAND_USDHC_BUS,
+              imx8m_clk_composite_critical("nand_usdhc_bus",
+                                           imx8mn_nand_usdhc_sels,
+                                           base + 0x8900));
+
+       /* IP */
+       clk_dm(IMX8MN_CLK_USDHC1,
+              imx8m_clk_composite("usdhc1", imx8mn_usdhc1_sels,
+                                  base + 0xac00));
+       clk_dm(IMX8MN_CLK_USDHC2,
+              imx8m_clk_composite("usdhc2", imx8mn_usdhc2_sels,
+                                  base + 0xac80));
+       clk_dm(IMX8MN_CLK_I2C1,
+              imx8m_clk_composite("i2c1", imx8mn_i2c1_sels, base + 0xad00));
+       clk_dm(IMX8MN_CLK_I2C2,
+              imx8m_clk_composite("i2c2", imx8mn_i2c2_sels, base + 0xad80));
+       clk_dm(IMX8MN_CLK_I2C3,
+              imx8m_clk_composite("i2c3", imx8mn_i2c3_sels, base + 0xae00));
+       clk_dm(IMX8MN_CLK_I2C4,
+              imx8m_clk_composite("i2c4", imx8mn_i2c4_sels, base + 0xae80));
+       clk_dm(IMX8MN_CLK_WDOG,
+              imx8m_clk_composite("wdog", imx8mn_wdog_sels, base + 0xb900));
+       clk_dm(IMX8MN_CLK_USDHC3,
+              imx8m_clk_composite("usdhc3", imx8mn_usdhc3_sels,
+                                  base + 0xbc80));
+
+       clk_dm(IMX8MN_CLK_I2C1_ROOT,
+              imx_clk_gate4("i2c1_root_clk", "i2c1", base + 0x4170, 0));
+       clk_dm(IMX8MN_CLK_I2C2_ROOT,
+              imx_clk_gate4("i2c2_root_clk", "i2c2", base + 0x4180, 0));
+       clk_dm(IMX8MN_CLK_I2C3_ROOT,
+              imx_clk_gate4("i2c3_root_clk", "i2c3", base + 0x4190, 0));
+       clk_dm(IMX8MN_CLK_I2C4_ROOT,
+              imx_clk_gate4("i2c4_root_clk", "i2c4", base + 0x41a0, 0));
+       clk_dm(IMX8MN_CLK_OCOTP_ROOT,
+              imx_clk_gate4("ocotp_root_clk", "ipg_root", base + 0x4220, 0));
+       clk_dm(IMX8MN_CLK_USDHC1_ROOT,
+              imx_clk_gate4("usdhc1_root_clk", "usdhc1", base + 0x4510, 0));
+       clk_dm(IMX8MN_CLK_USDHC2_ROOT,
+              imx_clk_gate4("usdhc2_root_clk", "usdhc2", base + 0x4520, 0));
+       clk_dm(IMX8MN_CLK_WDOG1_ROOT,
+              imx_clk_gate4("wdog1_root_clk", "wdog", base + 0x4530, 0));
+       clk_dm(IMX8MN_CLK_WDOG2_ROOT,
+              imx_clk_gate4("wdog2_root_clk", "wdog", base + 0x4540, 0));
+       clk_dm(IMX8MN_CLK_WDOG3_ROOT,
+              imx_clk_gate4("wdog3_root_clk", "wdog", base + 0x4550, 0));
+       clk_dm(IMX8MN_CLK_USDHC3_ROOT,
+              imx_clk_gate4("usdhc3_root_clk", "usdhc3", base + 0x45e0, 0));
+
+#ifdef CONFIG_SPL_BUILD
+       struct clk *clkp, *clkp1;
+
+       clk_get_by_id(IMX8MN_CLK_WDOG1_ROOT, &clkp);
+       clk_enable(clkp);
+       clk_get_by_id(IMX8MN_CLK_WDOG2_ROOT, &clkp);
+       clk_enable(clkp);
+       clk_get_by_id(IMX8MN_CLK_WDOG3_ROOT, &clkp);
+       clk_enable(clkp);
+
+       /* Configure SYS_PLL3 to 600MHz */
+       clk_get_by_id(IMX8MN_SYS_PLL3, &clkp);
+       clk_set_rate(clkp, 600000000UL);
+       clk_enable(clkp);
+
+       /* Configure ARM to sys_pll2_500m */
+       clk_get_by_id(IMX8MN_CLK_A53_SRC, &clkp);
+       clk_get_by_id(IMX8MN_SYS_PLL2_OUT, &clkp1);
+       clk_enable(clkp1);
+       clk_get_by_id(IMX8MN_SYS_PLL2_500M, &clkp1);
+       clk_set_parent(clkp, clkp1);
+
+       /* Configure ARM PLL to 1.2GHz */
+       clk_get_by_id(IMX8MN_ARM_PLL, &clkp1);
+       clk_set_rate(clkp1, 1200000000UL);
+       clk_get_by_id(IMX8MN_ARM_PLL_OUT, &clkp1);
+       clk_enable(clkp1);
+       clk_set_parent(clkp, clkp1);
+
+       /* Configure DIV to 1.2GHz */
+       clk_get_by_id(IMX8MN_CLK_A53_DIV, &clkp1);
+       clk_set_rate(clkp1, 1200000000UL);
+#endif
+
+       return 0;
+}
+
+static const struct udevice_id imx8mn_clk_ids[] = {
+       { .compatible = "fsl,imx8mn-ccm" },
+       { },
+};
+
+U_BOOT_DRIVER(imx8mn_clk) = {
+       .name = "clk_imx8mn",
+       .id = UCLASS_CLK,
+       .of_match = imx8mn_clk_ids,
+       .ops = &imx8mn_clk_ops,
+       .probe = imx8mn_clk_probe,
+       .flags = DM_FLAG_PRE_RELOC,
+};