add RCC clock driver for STMP32MP157
- base on driver model = UCLASS_CLK
- support ops to enable, disable and get rate
  of all SOC clock needed by U-Boot

Signed-off-by: Patrick Delaunay <patrick.delau...@st.com>
---

 MAINTAINERS                |    1 +
 drivers/clk/Kconfig        |    8 +
 drivers/clk/Makefile       |    1 +
 drivers/clk/clk_stm32mp1.c | 1157 ++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 1167 insertions(+)
 create mode 100644 drivers/clk/clk_stm32mp1.c

diff --git a/MAINTAINERS b/MAINTAINERS
index ff7b837..052b9f7 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -195,6 +195,7 @@ ARM STM STM32MP
 M:     Patrick Delaunay <patrick.delau...@st.com>
 S:     Maintained
 F:     arch/arm/mach-stm32mp
+F:     clk/clk_stm32mp1.c
 F:     ram/stm32mp1
 
 ARM STM STV0991
diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
index cdfa052..c382e88 100644
--- a/drivers/clk/Kconfig
+++ b/drivers/clk/Kconfig
@@ -75,6 +75,14 @@ config CLK_ZYNQMP
          This clock driver adds support for clock realted settings for
          ZynqMP platform.
 
+config CLK_STM32MP1
+       bool "Enable RCC clock driver for STM32MP1"
+       depends on ARCH_STM32MP && CLK
+       default y
+       help
+         Enable the STM32 clock (RCC) driver. Enable support for
+         manipulating STM32MP1's on-SoC clocks.
+
 source "drivers/clk/tegra/Kconfig"
 source "drivers/clk/uniphier/Kconfig"
 source "drivers/clk/exynos/Kconfig"
diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index dab106a..e05c607 100644
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -17,6 +17,7 @@ obj-$(CONFIG_CLK_EXYNOS) += exynos/
 obj-$(CONFIG_CLK_HSDK) += clk-hsdk-cgu.o
 obj-$(CONFIG_CLK_RENESAS) += renesas/
 obj-$(CONFIG_CLK_STM32F) += clk_stm32f.o
+obj-$(CONFIG_CLK_STM32MP1) += clk_stm32mp1.o
 obj-$(CONFIG_CLK_UNIPHIER) += uniphier/
 obj-$(CONFIG_CLK_ZYNQ) += clk_zynq.o
 obj-$(CONFIG_CLK_ZYNQMP) += clk_zynqmp.o
diff --git a/drivers/clk/clk_stm32mp1.c b/drivers/clk/clk_stm32mp1.c
new file mode 100644
index 0000000..0ea2035
--- /dev/null
+++ b/drivers/clk/clk_stm32mp1.c
@@ -0,0 +1,1157 @@
+/*
+ * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
+ *
+ * SPDX-License-Identifier:    GPL-2.0+        BSD-3-Clause
+ */
+
+#include <common.h>
+#include <clk-uclass.h>
+#include <div64.h>
+#include <dm.h>
+#include <regmap.h>
+#include <spl.h>
+#include <syscon.h>
+#include <linux/io.h>
+#include <dt-bindings/clock/stm32mp1-clks.h>
+
+#define MAX_HSI_HZ             64000000
+
+/* RCC registers */
+#define RCC_OCENSETR           0x0C
+#define RCC_OCENCLRR           0x10
+#define RCC_HSICFGR            0x18
+#define RCC_MPCKSELR           0x20
+#define RCC_ASSCKSELR          0x24
+#define RCC_RCK12SELR          0x28
+#define RCC_MPCKDIVR           0x2C
+#define RCC_AXIDIVR            0x30
+#define RCC_APB4DIVR           0x3C
+#define RCC_APB5DIVR           0x40
+#define RCC_RTCDIVR            0x44
+#define RCC_MSSCKSELR          0x48
+#define RCC_PLL1CR             0x80
+#define RCC_PLL1CFGR1          0x84
+#define RCC_PLL1CFGR2          0x88
+#define RCC_PLL1FRACR          0x8C
+#define RCC_PLL1CSGR           0x90
+#define RCC_PLL2CR             0x94
+#define RCC_PLL2CFGR1          0x98
+#define RCC_PLL2CFGR2          0x9C
+#define RCC_PLL2FRACR          0xA0
+#define RCC_PLL2CSGR           0xA4
+#define RCC_I2C46CKSELR                0xC0
+#define RCC_CPERCKSELR         0xD0
+#define RCC_STGENCKSELR                0xD4
+#define RCC_DDRITFCR           0xD8
+#define RCC_BDCR               0x140
+#define RCC_RDLSICR            0x144
+#define RCC_MP_APB4ENSETR      0x200
+#define RCC_MP_APB5ENSETR      0x208
+#define RCC_MP_AHB5ENSETR      0x210
+#define RCC_MP_AHB6ENSETR      0x218
+#define RCC_OCRDYR             0x808
+#define RCC_DBGCFGR            0x80C
+#define RCC_RCK3SELR           0x820
+#define RCC_RCK4SELR           0x824
+#define RCC_MCUDIVR            0x830
+#define RCC_APB1DIVR           0x834
+#define RCC_APB2DIVR           0x838
+#define RCC_APB3DIVR           0x83C
+#define RCC_PLL3CR             0x880
+#define RCC_PLL3CFGR1          0x884
+#define RCC_PLL3CFGR2          0x888
+#define RCC_PLL3FRACR          0x88C
+#define RCC_PLL3CSGR           0x890
+#define RCC_PLL4CR             0x894
+#define RCC_PLL4CFGR1          0x898
+#define RCC_PLL4CFGR2          0x89C
+#define RCC_PLL4FRACR          0x8A0
+#define RCC_PLL4CSGR           0x8A4
+#define RCC_I2C12CKSELR                0x8C0
+#define RCC_I2C35CKSELR                0x8C4
+#define RCC_UART6CKSELR                0x8E4
+#define RCC_UART24CKSELR       0x8E8
+#define RCC_UART35CKSELR       0x8EC
+#define RCC_UART78CKSELR       0x8F0
+#define RCC_SDMMC12CKSELR      0x8F4
+#define RCC_SDMMC3CKSELR       0x8F8
+#define RCC_ETHCKSELR          0x8FC
+#define RCC_QSPICKSELR         0x900
+#define RCC_FMCCKSELR          0x904
+#define RCC_USBCKSELR          0x91C
+#define RCC_MP_APB1ENSETR      0xA00
+#define RCC_MP_APB2ENSETR      0XA08
+#define RCC_MP_AHB2ENSETR      0xA18
+#define RCC_MP_AHB4ENSETR      0xA28
+
+/* used for most of SELR register */
+#define RCC_SELR_SRC_MASK      GENMASK(2, 0)
+#define RCC_SELR_SRCRDY                BIT(31)
+
+/* Values of RCC_MPCKSELR register */
+#define RCC_MPCKSELR_HSI       0
+#define RCC_MPCKSELR_HSE       1
+#define RCC_MPCKSELR_PLL       2
+#define RCC_MPCKSELR_PLL_MPUDIV        3
+
+/* Values of RCC_ASSCKSELR register */
+#define RCC_ASSCKSELR_HSI      0
+#define RCC_ASSCKSELR_HSE      1
+#define RCC_ASSCKSELR_PLL      2
+
+/* Values of RCC_MSSCKSELR register */
+#define RCC_MSSCKSELR_HSI      0
+#define RCC_MSSCKSELR_HSE      1
+#define RCC_MSSCKSELR_CSI      2
+#define RCC_MSSCKSELR_PLL      3
+
+/* Values of RCC_CPERCKSELR register */
+#define RCC_CPERCKSELR_HSI     0
+#define RCC_CPERCKSELR_CSI     1
+#define RCC_CPERCKSELR_HSE     2
+
+/* used for most of DIVR register : max div for RTC */
+#define RCC_DIVR_DIV_MASK      GENMASK(5, 0)
+#define RCC_DIVR_DIVRDY                BIT(31)
+
+/* Masks for specific DIVR registers */
+#define RCC_APBXDIV_MASK       GENMASK(2, 0)
+#define RCC_MPUDIV_MASK                GENMASK(2, 0)
+#define RCC_AXIDIV_MASK                GENMASK(2, 0)
+#define RCC_MCUDIV_MASK                GENMASK(3, 0)
+
+/*  offset between RCC_MP_xxxENSETR and RCC_MP_xxxENCLRR registers */
+#define RCC_MP_ENCLRR_OFFSET   4
+
+/* Fields of RCC_BDCR register */
+#define RCC_BDCR_LSEON         BIT(0)
+#define RCC_BDCR_LSEBYP                BIT(1)
+#define RCC_BDCR_LSERDY                BIT(2)
+#define RCC_BDCR_LSEDRV_MASK   GENMASK(5, 4)
+#define RCC_BDCR_LSEDRV_SHIFT  4
+#define RCC_BDCR_LSECSSON      BIT(8)
+#define RCC_BDCR_RTCCKEN       BIT(20)
+#define RCC_BDCR_RTCSRC_MASK   GENMASK(17, 16)
+#define RCC_BDCR_RTCSRC_SHIFT  16
+
+/* Fields of RCC_RDLSICR register */
+#define RCC_RDLSICR_LSION      BIT(0)
+#define RCC_RDLSICR_LSIRDY     BIT(1)
+
+/* used for ALL PLLNCR registers */
+#define RCC_PLLNCR_PLLON       BIT(0)
+#define RCC_PLLNCR_PLLRDY      BIT(1)
+#define RCC_PLLNCR_DIVPEN      BIT(4)
+#define RCC_PLLNCR_DIVQEN      BIT(5)
+#define RCC_PLLNCR_DIVREN      BIT(6)
+#define RCC_PLLNCR_DIVEN_SHIFT 4
+
+/* used for ALL PLLNCFGR1 registers */
+#define RCC_PLLNCFGR1_DIVM_SHIFT       16
+#define RCC_PLLNCFGR1_DIVM_MASK                GENMASK(21, 16)
+#define RCC_PLLNCFGR1_DIVN_SHIFT       0
+#define RCC_PLLNCFGR1_DIVN_MASK                GENMASK(8, 0)
+/* only for PLL3 and PLL4 */
+#define RCC_PLLNCFGR1_IFRGE_SHIFT      24
+#define RCC_PLLNCFGR1_IFRGE_MASK       GENMASK(25, 24)
+
+/* used for ALL PLLNCFGR2 registers */
+#define RCC_PLLNCFGR2_DIVX_MASK                GENMASK(6, 0)
+#define RCC_PLLNCFGR2_DIVP_SHIFT       0
+#define RCC_PLLNCFGR2_DIVP_MASK                GENMASK(6, 0)
+#define RCC_PLLNCFGR2_DIVQ_SHIFT       8
+#define RCC_PLLNCFGR2_DIVQ_MASK                GENMASK(14, 8)
+#define RCC_PLLNCFGR2_DIVR_SHIFT       16
+#define RCC_PLLNCFGR2_DIVR_MASK                GENMASK(22, 16)
+
+/* used for ALL PLLNFRACR registers */
+#define RCC_PLLNFRACR_FRACV_SHIFT      3
+#define RCC_PLLNFRACR_FRACV_MASK       GENMASK(15, 3)
+#define RCC_PLLNFRACR_FRACLE           BIT(16)
+
+/* used for ALL PLLNCSGR registers */
+#define RCC_PLLNCSGR_INC_STEP_SHIFT    16
+#define RCC_PLLNCSGR_INC_STEP_MASK     GENMASK(30, 16)
+#define RCC_PLLNCSGR_MOD_PER_SHIFT     0
+#define RCC_PLLNCSGR_MOD_PER_MASK      GENMASK(12, 0)
+#define RCC_PLLNCSGR_SSCG_MODE_SHIFT   15
+#define RCC_PLLNCSGR_SSCG_MODE_MASK    BIT(15)
+
+/* used for RCC_OCENSETR and RCC_OCENCLRR registers */
+#define RCC_OCENR_HSION                        BIT(0)
+#define RCC_OCENR_CSION                        BIT(4)
+#define RCC_OCENR_HSEON                        BIT(8)
+#define RCC_OCENR_HSEBYP               BIT(10)
+#define RCC_OCENR_HSECSSON             BIT(11)
+
+/* Fields of RCC_OCRDYR register */
+#define RCC_OCRDYR_HSIRDY              BIT(0)
+#define RCC_OCRDYR_HSIDIVRDY           BIT(2)
+#define RCC_OCRDYR_CSIRDY              BIT(4)
+#define RCC_OCRDYR_HSERDY              BIT(8)
+
+/* Fields of DDRITFCR register */
+#define RCC_DDRITFCR_DDRCKMOD_MASK     GENMASK(22, 20)
+#define RCC_DDRITFCR_DDRCKMOD_SHIFT    20
+#define RCC_DDRITFCR_DDRCKMOD_SSR      0
+
+/* Fields of RCC_HSICFGR register */
+#define RCC_HSICFGR_HSIDIV_MASK                GENMASK(1, 0)
+
+/* used for MCO related operations */
+#define RCC_MCOCFG_MCOON               BIT(12)
+#define RCC_MCOCFG_MCODIV_MASK         GENMASK(7, 4)
+#define RCC_MCOCFG_MCODIV_SHIFT                4
+#define RCC_MCOCFG_MCOSRC_MASK         GENMASK(2, 0)
+
+enum stm32mp1_parent_id {
+/*
+ * _HSI, _HSE, _CSI, _LSI, _LSE should not be moved
+ * they are used as index in osc[] as entry point
+ */
+       _HSI,
+       _HSE,
+       _CSI,
+       _LSI,
+       _LSE,
+       _I2S_CKIN,
+       _USB_PHY_48,
+       NB_OSC,
+
+/* other parent source */
+       _HSI_KER = NB_OSC,
+       _HSE_KER,
+       _HSE_KER_DIV2,
+       _CSI_KER,
+       _PLL1_P,
+       _PLL1_Q,
+       _PLL1_R,
+       _PLL2_P,
+       _PLL2_Q,
+       _PLL2_R,
+       _PLL3_P,
+       _PLL3_Q,
+       _PLL3_R,
+       _PLL4_P,
+       _PLL4_Q,
+       _PLL4_R,
+       _ACLK,
+       _PCLK1,
+       _PCLK2,
+       _PCLK3,
+       _PCLK4,
+       _PCLK5,
+       _HCLK6,
+       _HCLK2,
+       _CK_PER,
+       _CK_MPU,
+       _CK_MCU,
+       _PARENT_NB,
+       _UNKNOWN_ID = 0xff,
+};
+
+enum stm32mp1_parent_sel {
+       _I2C12_SEL,
+       _I2C35_SEL,
+       _I2C46_SEL,
+       _UART6_SEL,
+       _UART24_SEL,
+       _UART35_SEL,
+       _UART78_SEL,
+       _SDMMC12_SEL,
+       _SDMMC3_SEL,
+       _ETH_SEL,
+       _QSPI_SEL,
+       _FMC_SEL,
+       _USBPHY_SEL,
+       _USBO_SEL,
+       _STGEN_SEL,
+       _PARENT_SEL_NB,
+       _UNKNOWN_SEL = 0xff,
+};
+
+enum stm32mp1_pll_id {
+       _PLL1,
+       _PLL2,
+       _PLL3,
+       _PLL4,
+       _PLL_NB
+};
+
+enum stm32mp1_div_id {
+       _DIV_P,
+       _DIV_Q,
+       _DIV_R,
+       _DIV_NB,
+};
+
+enum stm32mp1_clksrc_id {
+       CLKSRC_MPU,
+       CLKSRC_AXI,
+       CLKSRC_MCU,
+       CLKSRC_PLL12,
+       CLKSRC_PLL3,
+       CLKSRC_PLL4,
+       CLKSRC_RTC,
+       CLKSRC_MCO1,
+       CLKSRC_MCO2,
+       CLKSRC_NB
+};
+
+enum stm32mp1_clkdiv_id {
+       CLKDIV_MPU,
+       CLKDIV_AXI,
+       CLKDIV_MCU,
+       CLKDIV_APB1,
+       CLKDIV_APB2,
+       CLKDIV_APB3,
+       CLKDIV_APB4,
+       CLKDIV_APB5,
+       CLKDIV_RTC,
+       CLKDIV_MCO1,
+       CLKDIV_MCO2,
+       CLKDIV_NB
+};
+
+enum stm32mp1_pllcfg {
+       PLLCFG_M,
+       PLLCFG_N,
+       PLLCFG_P,
+       PLLCFG_Q,
+       PLLCFG_R,
+       PLLCFG_O,
+       PLLCFG_NB
+};
+
+enum stm32mp1_pllcsg {
+       PLLCSG_MOD_PER,
+       PLLCSG_INC_STEP,
+       PLLCSG_SSCG_MODE,
+       PLLCSG_NB
+};
+
+enum stm32mp1_plltype {
+       PLL_800,
+       PLL_1600,
+       PLL_TYPE_NB
+};
+
+struct stm32mp1_pll {
+       u8 refclk_min;
+       u8 refclk_max;
+       u8 divn_max;
+};
+
+struct stm32mp1_clk_gate {
+       u16 offset;
+       u8 bit;
+       u8 index;
+       u8 set_clr;
+       u8 sel;
+       u8 fixed;
+};
+
+struct stm32mp1_clk_sel {
+       u16 offset;
+       u8 src;
+       u8 msk;
+       u8 nb_parent;
+       const u8 *parent;
+};
+
+#define REFCLK_SIZE 4
+struct stm32mp1_clk_pll {
+       enum stm32mp1_plltype plltype;
+       u16 rckxselr;
+       u16 pllxcfgr1;
+       u16 pllxcfgr2;
+       u16 pllxfracr;
+       u16 pllxcr;
+       u16 pllxcsgr;
+       u8 refclk[REFCLK_SIZE];
+};
+
+struct stm32mp1_clk_data {
+       const struct stm32mp1_clk_gate *gate;
+       const struct stm32mp1_clk_sel *sel;
+       const struct stm32mp1_clk_pll *pll;
+       const int nb_gate;
+};
+
+struct stm32mp1_clk_priv {
+       fdt_addr_t base;
+       const struct stm32mp1_clk_data *data;
+       ulong osc[NB_OSC];
+       struct udevice *osc_dev[NB_OSC];
+};
+
+#define STM32MP1_CLK(off, b, idx, s)           \
+       {                                       \
+               .offset = (off),                \
+               .bit = (b),                     \
+               .index = (idx),                 \
+               .set_clr = 0,                   \
+               .sel = (s),                     \
+               .fixed = _UNKNOWN_ID,           \
+       }
+
+#define STM32MP1_CLK_F(off, b, idx, f)         \
+       {                                       \
+               .offset = (off),                \
+               .bit = (b),                     \
+               .index = (idx),                 \
+               .set_clr = 0,                   \
+               .sel = _UNKNOWN_SEL,            \
+               .fixed = (f),                   \
+       }
+
+#define STM32MP1_CLK_SET_CLR(off, b, idx, s)   \
+       {                                       \
+               .offset = (off),                \
+               .bit = (b),                     \
+               .index = (idx),                 \
+               .set_clr = 1,                   \
+               .sel = (s),                     \
+               .fixed = _UNKNOWN_ID,           \
+       }
+
+#define STM32MP1_CLK_SET_CLR_F(off, b, idx, f) \
+       {                                       \
+               .offset = (off),                \
+               .bit = (b),                     \
+               .index = (idx),                 \
+               .set_clr = 1,                   \
+               .sel = _UNKNOWN_SEL,            \
+               .fixed = (f),                   \
+       }
+
+#define STM32MP1_CLK_PARENT(idx, off, s, m, p)   \
+       [(idx)] = {                             \
+               .offset = (off),                \
+               .src = (s),                     \
+               .msk = (m),                     \
+               .parent = (p),                  \
+               .nb_parent = ARRAY_SIZE((p))    \
+       }
+
+#define STM32MP1_CLK_PLL(idx, type, off1, off2, off3, off4, off5, off6,\
+                       p1, p2, p3, p4) \
+       [(idx)] = {                             \
+               .plltype = (type),                      \
+               .rckxselr = (off1),             \
+               .pllxcfgr1 = (off2),            \
+               .pllxcfgr2 = (off3),            \
+               .pllxfracr = (off4),            \
+               .pllxcr = (off5),               \
+               .pllxcsgr = (off6),             \
+               .refclk[0] = (p1),              \
+               .refclk[1] = (p2),              \
+               .refclk[2] = (p3),              \
+               .refclk[3] = (p4),              \
+       }
+
+static const u8 stm32mp1_clks[][2] = {
+       {CK_PER, _CK_PER},
+       {CK_MPU, _CK_MPU},
+       {CK_AXI, _ACLK},
+       {CK_MCU, _CK_MCU},
+       {CK_HSE, _HSE},
+       {CK_CSI, _CSI},
+       {CK_LSI, _LSI},
+       {CK_LSE, _LSE},
+       {CK_HSI, _HSI},
+       {CK_HSE_DIV2, _HSE_KER_DIV2},
+};
+
+static const struct stm32mp1_clk_gate stm32mp1_clk_gate[] = {
+       STM32MP1_CLK(RCC_DDRITFCR, 0, DDRC1, _UNKNOWN_SEL),
+       STM32MP1_CLK(RCC_DDRITFCR, 1, DDRC1LP, _UNKNOWN_SEL),
+       STM32MP1_CLK(RCC_DDRITFCR, 2, DDRC2, _UNKNOWN_SEL),
+       STM32MP1_CLK(RCC_DDRITFCR, 3, DDRC2LP, _UNKNOWN_SEL),
+       STM32MP1_CLK_F(RCC_DDRITFCR, 4, DDRPHYC, _PLL2_R),
+       STM32MP1_CLK(RCC_DDRITFCR, 5, DDRPHYCLP, _UNKNOWN_SEL),
+       STM32MP1_CLK(RCC_DDRITFCR, 6, DDRCAPB, _UNKNOWN_SEL),
+       STM32MP1_CLK(RCC_DDRITFCR, 7, DDRCAPBLP, _UNKNOWN_SEL),
+       STM32MP1_CLK(RCC_DDRITFCR, 8, AXIDCG, _UNKNOWN_SEL),
+       STM32MP1_CLK(RCC_DDRITFCR, 9, DDRPHYCAPB, _UNKNOWN_SEL),
+       STM32MP1_CLK(RCC_DDRITFCR, 10, DDRPHYCAPBLP, _UNKNOWN_SEL),
+
+       STM32MP1_CLK_SET_CLR(RCC_MP_APB1ENSETR, 14, USART2_K, _UART24_SEL),
+       STM32MP1_CLK_SET_CLR(RCC_MP_APB1ENSETR, 15, USART3_K, _UART35_SEL),
+       STM32MP1_CLK_SET_CLR(RCC_MP_APB1ENSETR, 16, UART4_K, _UART24_SEL),
+       STM32MP1_CLK_SET_CLR(RCC_MP_APB1ENSETR, 17, UART5_K, _UART35_SEL),
+       STM32MP1_CLK_SET_CLR(RCC_MP_APB1ENSETR, 18, UART7_K, _UART78_SEL),
+       STM32MP1_CLK_SET_CLR(RCC_MP_APB1ENSETR, 19, UART8_K, _UART78_SEL),
+       STM32MP1_CLK_SET_CLR(RCC_MP_APB1ENSETR, 21, I2C1_K, _I2C12_SEL),
+       STM32MP1_CLK_SET_CLR(RCC_MP_APB1ENSETR, 22, I2C2_K, _I2C12_SEL),
+       STM32MP1_CLK_SET_CLR(RCC_MP_APB1ENSETR, 23, I2C3_K, _I2C35_SEL),
+       STM32MP1_CLK_SET_CLR(RCC_MP_APB1ENSETR, 24, I2C5_K, _I2C35_SEL),
+
+       STM32MP1_CLK_SET_CLR(RCC_MP_APB2ENSETR, 13, USART6_K, _UART6_SEL),
+
+       STM32MP1_CLK_SET_CLR(RCC_MP_APB4ENSETR, 8, DDRPERFM, _UNKNOWN_SEL),
+       STM32MP1_CLK_SET_CLR(RCC_MP_APB4ENSETR, 15, IWDG2, _UNKNOWN_SEL),
+       STM32MP1_CLK_SET_CLR(RCC_MP_APB4ENSETR, 16, USBPHY_K, _USBPHY_SEL),
+
+       STM32MP1_CLK_SET_CLR(RCC_MP_APB5ENSETR, 2, I2C4_K, _I2C46_SEL),
+       STM32MP1_CLK_SET_CLR(RCC_MP_APB5ENSETR, 20, STGEN_K, _STGEN_SEL),
+
+       STM32MP1_CLK_SET_CLR(RCC_MP_AHB2ENSETR, 8, USBO_K, _USBO_SEL),
+       STM32MP1_CLK_SET_CLR(RCC_MP_AHB2ENSETR, 16, SDMMC3_K, _SDMMC3_SEL),
+
+       STM32MP1_CLK_SET_CLR(RCC_MP_AHB4ENSETR, 0, GPIOA, _UNKNOWN_SEL),
+       STM32MP1_CLK_SET_CLR(RCC_MP_AHB4ENSETR, 1, GPIOB, _UNKNOWN_SEL),
+       STM32MP1_CLK_SET_CLR(RCC_MP_AHB4ENSETR, 2, GPIOC, _UNKNOWN_SEL),
+       STM32MP1_CLK_SET_CLR(RCC_MP_AHB4ENSETR, 3, GPIOD, _UNKNOWN_SEL),
+       STM32MP1_CLK_SET_CLR(RCC_MP_AHB4ENSETR, 4, GPIOE, _UNKNOWN_SEL),
+       STM32MP1_CLK_SET_CLR(RCC_MP_AHB4ENSETR, 5, GPIOF, _UNKNOWN_SEL),
+       STM32MP1_CLK_SET_CLR(RCC_MP_AHB4ENSETR, 6, GPIOG, _UNKNOWN_SEL),
+       STM32MP1_CLK_SET_CLR(RCC_MP_AHB4ENSETR, 7, GPIOH, _UNKNOWN_SEL),
+       STM32MP1_CLK_SET_CLR(RCC_MP_AHB4ENSETR, 8, GPIOI, _UNKNOWN_SEL),
+       STM32MP1_CLK_SET_CLR(RCC_MP_AHB4ENSETR, 9, GPIOJ, _UNKNOWN_SEL),
+       STM32MP1_CLK_SET_CLR(RCC_MP_AHB4ENSETR, 10, GPIOK, _UNKNOWN_SEL),
+
+       STM32MP1_CLK_SET_CLR(RCC_MP_AHB5ENSETR, 0, GPIOZ, _UNKNOWN_SEL),
+
+       STM32MP1_CLK_SET_CLR(RCC_MP_AHB6ENSETR, 7, ETHCK, _UNKNOWN_SEL),
+       STM32MP1_CLK_SET_CLR(RCC_MP_AHB6ENSETR, 8, ETHTX, _UNKNOWN_SEL),
+       STM32MP1_CLK_SET_CLR(RCC_MP_AHB6ENSETR, 9, ETHRX, _UNKNOWN_SEL),
+       STM32MP1_CLK_SET_CLR(RCC_MP_AHB6ENSETR, 10, ETHMAC_K, _ETH_SEL),
+       STM32MP1_CLK_SET_CLR_F(RCC_MP_AHB6ENSETR, 10, ETHMAC, _ACLK),
+       STM32MP1_CLK_SET_CLR(RCC_MP_AHB6ENSETR, 12, FMC_K, _FMC_SEL),
+       STM32MP1_CLK_SET_CLR(RCC_MP_AHB6ENSETR, 14, QSPI_K, _QSPI_SEL),
+       STM32MP1_CLK_SET_CLR(RCC_MP_AHB6ENSETR, 16, SDMMC1_K, _SDMMC12_SEL),
+       STM32MP1_CLK_SET_CLR(RCC_MP_AHB6ENSETR, 17, SDMMC2_K, _SDMMC12_SEL),
+       STM32MP1_CLK_SET_CLR(RCC_MP_AHB6ENSETR, 24, USBH, _UNKNOWN_SEL),
+
+       STM32MP1_CLK(RCC_DBGCFGR, 8, CK_DBG, _UNKNOWN_SEL),
+};
+
+static const u8 i2c12_parents[] = {_PCLK1, _PLL4_R, _HSI_KER, _CSI_KER};
+static const u8 i2c35_parents[] = {_PCLK1, _PLL4_R, _HSI_KER, _CSI_KER};
+static const u8 i2c46_parents[] = {_PCLK5, _PLL3_Q, _HSI_KER, _CSI_KER};
+static const u8 uart6_parents[] = {_PCLK2, _PLL4_Q, _HSI_KER, _CSI_KER,
+                                       _HSE_KER};
+static const u8 uart24_parents[] = {_PCLK1, _PLL4_Q, _HSI_KER, _CSI_KER,
+                                        _HSE_KER};
+static const u8 uart35_parents[] = {_PCLK1, _PLL4_Q, _HSI_KER, _CSI_KER,
+                                        _HSE_KER};
+static const u8 uart78_parents[] = {_PCLK1, _PLL4_Q, _HSI_KER, _CSI_KER,
+                                        _HSE_KER};
+static const u8 sdmmc12_parents[] = {_HCLK6, _PLL3_R, _PLL4_P, _HSI_KER};
+static const u8 sdmmc3_parents[] = {_HCLK2, _PLL3_R, _PLL4_P, _HSI_KER};
+static const u8 eth_parents[] = {_PLL4_P, _PLL3_Q};
+static const u8 qspi_parents[] = {_ACLK, _PLL3_R, _PLL4_P, _CK_PER};
+static const u8 fmc_parents[] = {_ACLK, _PLL3_R, _PLL4_P, _CK_PER};
+static const u8 usbphy_parents[] = {_HSE_KER, _PLL4_R, _HSE_KER_DIV2};
+static const u8 usbo_parents[] = {_PLL4_R, _USB_PHY_48};
+static const u8 stgen_parents[] = {_HSI_KER, _HSE_KER};
+
+static const struct stm32mp1_clk_sel stm32mp1_clk_sel[_PARENT_SEL_NB] = {
+       STM32MP1_CLK_PARENT(_I2C12_SEL, RCC_I2C12CKSELR, 0, 0x7, i2c12_parents),
+       STM32MP1_CLK_PARENT(_I2C35_SEL, RCC_I2C35CKSELR, 0, 0x7, i2c35_parents),
+       STM32MP1_CLK_PARENT(_I2C46_SEL, RCC_I2C46CKSELR, 0, 0x7, i2c46_parents),
+       STM32MP1_CLK_PARENT(_UART6_SEL, RCC_UART6CKSELR, 0, 0x7, uart6_parents),
+       STM32MP1_CLK_PARENT(_UART24_SEL, RCC_UART24CKSELR, 0, 0x7,
+                           uart24_parents),
+       STM32MP1_CLK_PARENT(_UART35_SEL, RCC_UART35CKSELR, 0, 0x7,
+                           uart35_parents),
+       STM32MP1_CLK_PARENT(_UART78_SEL, RCC_UART78CKSELR, 0, 0x7,
+                           uart78_parents),
+       STM32MP1_CLK_PARENT(_SDMMC12_SEL, RCC_SDMMC12CKSELR, 0, 0x7,
+                           sdmmc12_parents),
+       STM32MP1_CLK_PARENT(_SDMMC3_SEL, RCC_SDMMC3CKSELR, 0, 0x7,
+                           sdmmc3_parents),
+       STM32MP1_CLK_PARENT(_ETH_SEL, RCC_ETHCKSELR, 0, 0x3, eth_parents),
+       STM32MP1_CLK_PARENT(_QSPI_SEL, RCC_QSPICKSELR, 0, 0xf, qspi_parents),
+       STM32MP1_CLK_PARENT(_FMC_SEL, RCC_FMCCKSELR, 0, 0xf, fmc_parents),
+       STM32MP1_CLK_PARENT(_USBPHY_SEL, RCC_USBCKSELR, 0, 0x3, usbphy_parents),
+       STM32MP1_CLK_PARENT(_USBO_SEL, RCC_USBCKSELR, 4, 0x1, usbo_parents),
+       STM32MP1_CLK_PARENT(_STGEN_SEL, RCC_STGENCKSELR, 0, 0x3, stgen_parents),
+};
+
+#ifdef STM32MP1_CLOCK_TREE_INIT
+/* define characteristic of PLL according type */
+#define DIVN_MIN       24
+static const struct stm32mp1_pll stm32mp1_pll[PLL_TYPE_NB] = {
+       [PLL_800] = {
+               .refclk_min = 4,
+               .refclk_max = 16,
+               .divn_max = 99,
+               },
+       [PLL_1600] = {
+               .refclk_min = 8,
+               .refclk_max = 16,
+               .divn_max = 199,
+               },
+};
+#endif /* STM32MP1_CLOCK_TREE_INIT */
+
+static const struct stm32mp1_clk_pll stm32mp1_clk_pll[_PLL_NB] = {
+       STM32MP1_CLK_PLL(_PLL1, PLL_1600,
+                        RCC_RCK12SELR, RCC_PLL1CFGR1, RCC_PLL1CFGR2,
+                        RCC_PLL1FRACR, RCC_PLL1CR, RCC_PLL1CSGR,
+                        _HSI, _HSE, _UNKNOWN_ID, _UNKNOWN_ID),
+       STM32MP1_CLK_PLL(_PLL2, PLL_1600,
+                        RCC_RCK12SELR, RCC_PLL2CFGR1, RCC_PLL2CFGR2,
+                        RCC_PLL2FRACR, RCC_PLL2CR, RCC_PLL2CSGR,
+                        _HSI, _HSE, _UNKNOWN_ID, _UNKNOWN_ID),
+       STM32MP1_CLK_PLL(_PLL3, PLL_800,
+                        RCC_RCK3SELR, RCC_PLL3CFGR1, RCC_PLL3CFGR2,
+                        RCC_PLL3FRACR, RCC_PLL3CR, RCC_PLL3CSGR,
+                        _HSI, _HSE, _CSI, _UNKNOWN_ID),
+       STM32MP1_CLK_PLL(_PLL4, PLL_800,
+                        RCC_RCK4SELR, RCC_PLL4CFGR1, RCC_PLL4CFGR2,
+                        RCC_PLL4FRACR, RCC_PLL4CR, RCC_PLL4CSGR,
+                        _HSI, _HSE, _CSI, _I2S_CKIN),
+};
+
+/* Prescaler table lookups for clock computation */
+/* div = /1 /2 /4 /8 / 16 /64 /128 /512 */
+static const u8 stm32mp1_mcu_div[16] = {
+       0, 1, 2, 3, 4, 6, 7, 8, 9, 9, 9, 9, 9, 9, 9, 9
+};
+
+/* div = /1 /2 /4 /8 /16 : same divider for pmu and apbx*/
+#define stm32mp1_mpu_div stm32mp1_mpu_apbx_div
+#define stm32mp1_apbx_div stm32mp1_mpu_apbx_div
+static const u8 stm32mp1_mpu_apbx_div[8] = {
+       0, 1, 2, 3, 4, 4, 4, 4
+};
+
+/* div = /1 /2 /3 /4 */
+static const u8 stm32mp1_axi_div[8] = {
+       1, 2, 3, 4, 4, 4, 4, 4
+};
+
+#ifdef DEBUG
+static const char * const stm32mp1_clk_parent_name[_PARENT_NB] = {
+       [_HSI] = "HSI",
+       [_HSE] = "HSE",
+       [_CSI] = "CSI",
+       [_LSI] = "LSI",
+       [_LSE] = "LSE",
+       [_I2S_CKIN] = "I2S_CKIN",
+       [_HSI_KER] = "HSI_KER",
+       [_HSE_KER] = "HSE_KER",
+       [_HSE_KER_DIV2] = "HSE_KER_DIV2",
+       [_CSI_KER] = "CSI_KER",
+       [_PLL1_P] = "PLL1_P",
+       [_PLL1_Q] = "PLL1_Q",
+       [_PLL1_R] = "PLL1_R",
+       [_PLL2_P] = "PLL2_P",
+       [_PLL2_Q] = "PLL2_Q",
+       [_PLL2_R] = "PLL2_R",
+       [_PLL3_P] = "PLL3_P",
+       [_PLL3_Q] = "PLL3_Q",
+       [_PLL3_R] = "PLL3_R",
+       [_PLL4_P] = "PLL4_P",
+       [_PLL4_Q] = "PLL4_Q",
+       [_PLL4_R] = "PLL4_R",
+       [_ACLK] = "ACLK",
+       [_PCLK1] = "PCLK1",
+       [_PCLK2] = "PCLK2",
+       [_PCLK3] = "PCLK3",
+       [_PCLK4] = "PCLK4",
+       [_PCLK5] = "PCLK5",
+       [_HCLK6] = "KCLK6",
+       [_HCLK2] = "HCLK2",
+       [_CK_PER] = "CK_PER",
+       [_CK_MPU] = "CK_MPU",
+       [_CK_MCU] = "CK_MCU",
+       [_USB_PHY_48] = "USB_PHY_48"
+};
+
+static const char * const stm32mp1_clk_parent_sel_name[_PARENT_SEL_NB] = {
+       [_I2C12_SEL] = "I2C12",
+       [_I2C35_SEL] = "I2C35",
+       [_I2C46_SEL] = "I2C46",
+       [_UART6_SEL] = "UART6",
+       [_UART24_SEL] = "UART24",
+       [_UART35_SEL] = "UART35",
+       [_UART78_SEL] = "UART78",
+       [_SDMMC12_SEL] = "SDMMC12",
+       [_SDMMC3_SEL] = "SDMMC3",
+       [_ETH_SEL] = "ETH",
+       [_QSPI_SEL] = "QSPI",
+       [_FMC_SEL] = "FMC",
+       [_USBPHY_SEL] = "USBPHY",
+       [_USBO_SEL] = "USBO",
+       [_STGEN_SEL] = "STGEN"
+};
+#endif
+
+static const struct stm32mp1_clk_data stm32mp1_data = {
+       .gate = stm32mp1_clk_gate,
+       .sel = stm32mp1_clk_sel,
+       .pll = stm32mp1_clk_pll,
+       .nb_gate = ARRAY_SIZE(stm32mp1_clk_gate),
+};
+
+static ulong stm32mp1_clk_get_fixed(struct stm32mp1_clk_priv *priv, int idx)
+{
+       if (idx >= NB_OSC) {
+               debug("%s: clk id %d not found\n", __func__, idx);
+               return 0;
+       }
+
+       debug("%s: clk id %d = %x : %ld kHz\n", __func__, idx,
+             (u32)priv->osc[idx], priv->osc[idx] / 1000);
+
+       return priv->osc[idx];
+}
+
+static int stm32mp1_clk_get_id(struct stm32mp1_clk_priv *priv, unsigned long 
id)
+{
+       const struct stm32mp1_clk_gate *gate = priv->data->gate;
+       int i, nb_clks = priv->data->nb_gate;
+
+       for (i = 0; i < nb_clks; i++) {
+               if (gate[i].index == id)
+                       break;
+       }
+
+       if (i == nb_clks) {
+               printf("%s: clk id %d not found\n", __func__, (u32)id);
+               return -EINVAL;
+       }
+
+       return i;
+}
+
+static int stm32mp1_clk_get_sel(struct stm32mp1_clk_priv *priv,
+                               int i)
+{
+       const struct stm32mp1_clk_gate *gate = priv->data->gate;
+
+       if (gate[i].sel > _PARENT_SEL_NB) {
+               printf("%s: parents for clk id %d not found\n",
+                      __func__, i);
+               return -EINVAL;
+       }
+
+       return gate[i].sel;
+}
+
+static int stm32mp1_clk_get_fixed_parent(struct stm32mp1_clk_priv *priv,
+                                        int i)
+{
+       const struct stm32mp1_clk_gate *gate = priv->data->gate;
+
+       if (gate[i].fixed == _UNKNOWN_ID)
+               return -ENOENT;
+
+       return gate[i].fixed;
+}
+
+static int stm32mp1_clk_get_parent(struct stm32mp1_clk_priv *priv,
+                                  unsigned long id)
+{
+       const struct stm32mp1_clk_sel *sel = priv->data->sel;
+       int i;
+       int s, p;
+
+       for (i = 0; i < ARRAY_SIZE(stm32mp1_clks); i++)
+               if (stm32mp1_clks[i][0] == id)
+                       return stm32mp1_clks[i][1];
+
+       i = stm32mp1_clk_get_id(priv, id);
+       if (i < 0)
+               return i;
+
+       p = stm32mp1_clk_get_fixed_parent(priv, i);
+       if (p >= 0 && p < _PARENT_NB)
+               return p;
+
+       s = stm32mp1_clk_get_sel(priv, i);
+       if (s < 0)
+               return s;
+
+       p = (readl(priv->base + sel[s].offset) >> sel[s].src) & sel[s].msk;
+
+       if (p < sel[s].nb_parent) {
+#ifdef DEBUG
+               debug("%s: %s clock is the parent %s of clk id %d\n", __func__,
+                     stm32mp1_clk_parent_name[sel[s].parent[p]],
+                     stm32mp1_clk_parent_sel_name[s],
+                     (u32)id);
+#endif
+               return sel[s].parent[p];
+       }
+
+       pr_err("%s: no parents defined for clk id %d\n",
+              __func__, (u32)id);
+
+       return -EINVAL;
+}
+
+static ulong stm32mp1_read_pll_freq(struct stm32mp1_clk_priv *priv,
+                                   int pll_id, int div_id)
+{
+       const struct stm32mp1_clk_pll *pll = priv->data->pll;
+       int divm, divn, divy, src;
+       ulong refclk, dfout;
+       u32 selr, cfgr1, cfgr2, fracr;
+       const u8 shift[_DIV_NB] = {
+               [_DIV_P] = RCC_PLLNCFGR2_DIVP_SHIFT,
+               [_DIV_Q] = RCC_PLLNCFGR2_DIVQ_SHIFT,
+               [_DIV_R] = RCC_PLLNCFGR2_DIVR_SHIFT };
+
+       debug("%s(%d, %d)\n", __func__, pll_id, div_id);
+       if (div_id > _DIV_NB)
+               return 0;
+
+       selr = readl(priv->base + pll[pll_id].rckxselr);
+       cfgr1 = readl(priv->base + pll[pll_id].pllxcfgr1);
+       cfgr2 = readl(priv->base + pll[pll_id].pllxcfgr2);
+       fracr = readl(priv->base + pll[pll_id].pllxfracr);
+
+       debug("PLL%d : selr=%x cfgr1=%x cfgr2=%x fracr=%x\n",
+             pll_id, selr, cfgr1, cfgr2, fracr);
+
+       divm = (cfgr1 & (RCC_PLLNCFGR1_DIVM_MASK)) >> RCC_PLLNCFGR1_DIVM_SHIFT;
+       divn = cfgr1 & RCC_PLLNCFGR1_DIVN_MASK;
+       divy = (cfgr2 >> shift[div_id]) & RCC_PLLNCFGR2_DIVX_MASK;
+
+       debug("        DIVN=%d DIVM=%d DIVY=%d\n", divn, divm, divy);
+
+       src = selr & RCC_SELR_SRC_MASK;
+       refclk = stm32mp1_clk_get_fixed(priv, pll[pll_id].refclk[src]);
+
+       debug("        refclk = %d kHz\n", (u32)(refclk / 1000));
+
+       /*
+        * For: PLL1 & PLL2 => VCO is * 2 but ck_pll_y is also / 2
+        * So same final result than PLL2 et 4
+        * with FRACV :
+        *   Fck_pll_y = Fck_ref * ((DIVN + 1) + FRACV / 2^13)
+        *               / (DIVM + 1) * (DIVy + 1)
+        * without FRACV
+        *   Fck_pll_y = Fck_ref * ((DIVN + 1) / (DIVM + 1) *(DIVy + 1)
+        */
+       if (fracr & RCC_PLLNFRACR_FRACLE) {
+               u32 fracv = (fracr & RCC_PLLNFRACR_FRACV_MASK)
+                           >> RCC_PLLNFRACR_FRACV_SHIFT;
+               dfout = (ulong)lldiv((unsigned long long)refclk *
+                                    (((divn + 1) << 13) + fracv),
+                                    ((unsigned long long)(divm + 1) *
+                                     (divy + 1)) << 13);
+       } else {
+               dfout = (ulong)(refclk * (divn + 1) / (divm + 1) * (divy + 1));
+       }
+       debug("        => dfout = %d kHz\n", (u32)(dfout / 1000));
+
+       return dfout;
+}
+
+static ulong stm32mp1_clk_get(struct stm32mp1_clk_priv *priv, int p)
+{
+       u32 reg;
+       ulong clock = 0;
+
+       switch (p) {
+       case _CK_MPU:
+       /* MPU sub system */
+               reg = readl(priv->base + RCC_MPCKSELR);
+               switch (reg & RCC_SELR_SRC_MASK) {
+               case RCC_MPCKSELR_HSI:
+                       clock = stm32mp1_clk_get_fixed(priv, _HSI);
+                       break;
+               case RCC_MPCKSELR_HSE:
+                       clock = stm32mp1_clk_get_fixed(priv, _HSE);
+                       break;
+               case RCC_MPCKSELR_PLL:
+               case RCC_MPCKSELR_PLL_MPUDIV:
+                       clock = stm32mp1_read_pll_freq(priv, _PLL1, _DIV_P);
+                       if (p == RCC_MPCKSELR_PLL_MPUDIV) {
+                               reg = readl(priv->base + RCC_MPCKDIVR);
+                               clock /= stm32mp1_mpu_div[reg &
+                                                         RCC_MPUDIV_MASK];
+                       }
+                       break;
+               }
+               break;
+       /* AXI sub system */
+       case _ACLK:
+       case _HCLK2:
+       case _HCLK6:
+       case _PCLK4:
+       case _PCLK5:
+               reg = readl(priv->base + RCC_ASSCKSELR);
+               switch (reg & RCC_SELR_SRC_MASK) {
+               case RCC_ASSCKSELR_HSI:
+                       clock = stm32mp1_clk_get_fixed(priv, _HSI);
+                       break;
+               case RCC_ASSCKSELR_HSE:
+                       clock = stm32mp1_clk_get_fixed(priv, _HSE);
+                       break;
+               case RCC_ASSCKSELR_PLL:
+                       clock = stm32mp1_read_pll_freq(priv, _PLL2, _DIV_P);
+                       break;
+               }
+
+               /* System clock divider */
+               reg = readl(priv->base + RCC_AXIDIVR);
+               clock /= stm32mp1_axi_div[reg & RCC_AXIDIV_MASK];
+
+               switch (p) {
+               case _PCLK4:
+                       reg = readl(priv->base + RCC_APB4DIVR);
+                       clock >>= stm32mp1_apbx_div[reg & RCC_APBXDIV_MASK];
+                       break;
+               case _PCLK5:
+                       reg = readl(priv->base + RCC_APB5DIVR);
+                       clock >>= stm32mp1_apbx_div[reg & RCC_APBXDIV_MASK];
+                       break;
+               default:
+                       break;
+               }
+               break;
+       /* MCU sub system */
+       case _CK_MCU:
+       case _PCLK1:
+       case _PCLK2:
+       case _PCLK3:
+               reg = readl(priv->base + RCC_MSSCKSELR);
+               switch (reg & RCC_SELR_SRC_MASK) {
+               case RCC_MSSCKSELR_HSI:
+                       clock = stm32mp1_clk_get_fixed(priv, _HSI);
+                       break;
+               case RCC_MSSCKSELR_HSE:
+                       clock = stm32mp1_clk_get_fixed(priv, _HSE);
+                       break;
+               case RCC_MSSCKSELR_CSI:
+                       clock = stm32mp1_clk_get_fixed(priv, _CSI);
+                       break;
+               case RCC_MSSCKSELR_PLL:
+                       clock = stm32mp1_read_pll_freq(priv, _PLL3, _DIV_P);
+                       break;
+               }
+
+               /* MCU clock divider */
+               reg = readl(priv->base + RCC_MCUDIVR);
+               clock >>= stm32mp1_mcu_div[reg & RCC_MCUDIV_MASK];
+
+               switch (p) {
+               case _PCLK1:
+                       reg = readl(priv->base + RCC_APB1DIVR);
+                       clock >>= stm32mp1_apbx_div[reg & RCC_APBXDIV_MASK];
+                       break;
+               case _PCLK2:
+                       reg = readl(priv->base + RCC_APB2DIVR);
+                       clock >>= stm32mp1_apbx_div[reg & RCC_APBXDIV_MASK];
+                       break;
+               case _PCLK3:
+                       reg = readl(priv->base + RCC_APB3DIVR);
+                       clock >>= stm32mp1_apbx_div[reg & RCC_APBXDIV_MASK];
+                       break;
+               case _CK_MCU:
+               default:
+                       break;
+               }
+               break;
+       case _CK_PER:
+               reg = readl(priv->base + RCC_CPERCKSELR);
+               switch (reg & RCC_SELR_SRC_MASK) {
+               case RCC_CPERCKSELR_HSI:
+                       clock = stm32mp1_clk_get_fixed(priv, _HSI);
+                       break;
+               case RCC_CPERCKSELR_HSE:
+                       clock = stm32mp1_clk_get_fixed(priv, _HSE);
+                       break;
+               case RCC_CPERCKSELR_CSI:
+                       clock = stm32mp1_clk_get_fixed(priv, _CSI);
+                       break;
+               }
+               break;
+       case _HSI:
+       case _HSI_KER:
+               clock = stm32mp1_clk_get_fixed(priv, _HSI);
+               break;
+       case _CSI:
+       case _CSI_KER:
+               clock = stm32mp1_clk_get_fixed(priv, _CSI);
+               break;
+       case _HSE:
+       case _HSE_KER:
+       case _HSE_KER_DIV2:
+               clock = stm32mp1_clk_get_fixed(priv, _HSE);
+               if (p == _HSE_KER_DIV2)
+                       clock >>= 1;
+               break;
+       case _LSI:
+               clock = stm32mp1_clk_get_fixed(priv, _LSI);
+               break;
+       case _LSE:
+               clock = stm32mp1_clk_get_fixed(priv, _LSE);
+               break;
+       /* PLL */
+       case _PLL1_P:
+       case _PLL1_Q:
+       case _PLL1_R:
+               clock = stm32mp1_read_pll_freq(priv, _PLL1, p - _PLL1_P);
+               break;
+       case _PLL2_P:
+       case _PLL2_Q:
+       case _PLL2_R:
+               clock = stm32mp1_read_pll_freq(priv, _PLL2, p - _PLL2_P);
+               break;
+       case _PLL3_P:
+       case _PLL3_Q:
+       case _PLL3_R:
+               clock = stm32mp1_read_pll_freq(priv, _PLL3, p - _PLL3_P);
+               break;
+       case _PLL4_P:
+       case _PLL4_Q:
+       case _PLL4_R:
+               clock = stm32mp1_read_pll_freq(priv, _PLL4, p - _PLL4_P);
+               break;
+       /* other */
+       case _USB_PHY_48:
+               clock = stm32mp1_clk_get_fixed(priv, _USB_PHY_48);
+               break;
+
+       default:
+               break;
+       }
+
+       debug("%s(%d) clock = %lx : %ld kHz\n",
+             __func__, p, clock, clock / 1000);
+
+       return clock;
+}
+
+static int stm32mp1_clk_enable(struct clk *clk)
+{
+       struct stm32mp1_clk_priv *priv = dev_get_priv(clk->dev);
+       const struct stm32mp1_clk_gate *gate = priv->data->gate;
+       int i = stm32mp1_clk_get_id(priv, clk->id);
+
+       if (i < 0)
+               return i;
+
+       if (gate[i].set_clr)
+               writel(BIT(gate[i].bit), priv->base + gate[i].offset);
+       else
+               setbits_le32(priv->base + gate[i].offset, BIT(gate[i].bit));
+
+       debug("%s: id clock %d has been enabled\n", __func__, (u32)clk->id);
+
+       return 0;
+}
+
+static int stm32mp1_clk_disable(struct clk *clk)
+{
+       struct stm32mp1_clk_priv *priv = dev_get_priv(clk->dev);
+       const struct stm32mp1_clk_gate *gate = priv->data->gate;
+       int i = stm32mp1_clk_get_id(priv, clk->id);
+
+       if (i < 0)
+               return i;
+
+       if (gate[i].set_clr)
+               writel(BIT(gate[i].bit),
+                      priv->base + gate[i].offset
+                      + RCC_MP_ENCLRR_OFFSET);
+       else
+               clrbits_le32(priv->base + gate[i].offset, BIT(gate[i].bit));
+
+       debug("%s: id clock %d has been disabled\n", __func__, (u32)clk->id);
+
+       return 0;
+}
+
+static ulong stm32mp1_clk_get_rate(struct clk *clk)
+{
+       struct stm32mp1_clk_priv *priv = dev_get_priv(clk->dev);
+       int p = stm32mp1_clk_get_parent(priv, clk->id);
+       ulong rate;
+
+       if (p < 0)
+               return 0;
+
+       rate = stm32mp1_clk_get(priv, p);
+
+#ifdef DEBUG
+       debug("%s: computed rate for id clock %d is %d (parent is %s)\n",
+             __func__, (u32)clk->id, (u32)rate, stm32mp1_clk_parent_name[p]);
+#endif
+       return rate;
+}
+
+static void stm32mp1_osc_clk_init(const char *name,
+                                 struct stm32mp1_clk_priv *priv,
+                                 int index)
+{
+       struct clk clk;
+       struct udevice *dev = NULL;
+
+       priv->osc[index] = 0;
+       clk.id = 0;
+       if (!uclass_get_device_by_name(UCLASS_CLK, name, &dev)) {
+               if (clk_request(dev, &clk))
+                       pr_err("%s request", name);
+               else
+                       priv->osc[index] = clk_get_rate(&clk);
+       }
+       priv->osc_dev[index] = dev;
+}
+
+static void stm32mp1_osc_init(struct udevice *dev)
+{
+       struct stm32mp1_clk_priv *priv = dev_get_priv(dev);
+       int i;
+       const char *name[NB_OSC] = {
+               [_LSI] = "clk-lsi",
+               [_LSE] = "clk-lse",
+               [_HSI] = "clk-hsi",
+               [_HSE] = "clk-hse",
+               [_CSI] = "clk-csi",
+               [_I2S_CKIN] = "i2s_ckin",
+               [_USB_PHY_48] = "ck_usbo_48m"};
+
+       for (i = 0; i < NB_OSC; i++) {
+               stm32mp1_osc_clk_init(name[i], priv, i);
+               debug("%d: %s => %x\n", i, name[i], (u32)priv->osc[i]);
+       }
+}
+
+static int stm32mp1_clk_probe(struct udevice *dev)
+{
+       int result = 0;
+       struct stm32mp1_clk_priv *priv = dev_get_priv(dev);
+
+       priv->base = dev_read_addr(dev->parent);
+       if (priv->base == FDT_ADDR_T_NONE)
+               return -EINVAL;
+
+       priv->data = (void *)&stm32mp1_data;
+
+       if (!priv->data->gate || !priv->data->sel ||
+           !priv->data->pll)
+               return -EINVAL;
+
+       stm32mp1_osc_init(dev);
+
+       return result;
+}
+
+static const struct clk_ops stm32mp1_clk_ops = {
+       .enable = stm32mp1_clk_enable,
+       .disable = stm32mp1_clk_disable,
+       .get_rate = stm32mp1_clk_get_rate,
+};
+
+static const struct udevice_id stm32mp1_clk_ids[] = {
+       { .compatible = "st,stm32mp1-rcc-clk" },
+       { }
+};
+
+U_BOOT_DRIVER(stm32mp1_clock) = {
+       .name = "stm32mp1_clk",
+       .id = UCLASS_CLK,
+       .of_match = stm32mp1_clk_ids,
+       .ops = &stm32mp1_clk_ops,
+       .priv_auto_alloc_size = sizeof(struct stm32mp1_clk_priv),
+       .probe = stm32mp1_clk_probe,
+};
-- 
2.7.4

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