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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