imx: imx7d: clock control module support

* Add Clock control module (CCM) support
* iMX7D SoC introduces 3 main clock sysmtem abstraction for clock
  root frequency generation denominated clock slices.
  Core clock slice: hihg speed clock for ARM core
  Bus clock slice: for bus clocks
  IP clock slice: Peripheral clocks
* At system boot ROM enables PLL_ARM, PLL_DDR, PLL_SYS, PLL_ENET
  In u-boot, we have to:
  - Configure PFD3- PFD7 for freq we needed in u-boot
  - Set clock root for peripherals (ip channel)

Signed-off-by: Adrian Alonso <aalonso@freescale.com>
Signed-off-by: Peng Fan <Peng.Fan@freescale.com>
Signed-off-by: Ye.Li <B37916@freescale.com>

2 files changed, 464 insertions, 0 deletions

diff --git a/arch/arm/include/asm/arch-mx7/clock.h b/arch/arm/include/asm/arch-mx7/clock.h
new file mode 100644
index 0000000000..688d2361df
--- /dev/null
+++ b/arch/arm/include/asm/arch-mx7/clock.h
@@ -0,0 +1,348 @@
+/*
+ * Copyright (C) 2015 Freescale Semiconductor, Inc.
+ *
+ * Author:
+ *	Peng Fan <Peng.Fan@freescale.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef _ASM_ARCH_CLOCK_H
+#define _ASM_ARCH_CLOCK_H
+
+#include <common.h>
+#include <asm/arch/crm_regs.h>
+
+#ifdef CONFIG_SYS_MX7_HCLK
+#define MXC_HCLK	CONFIG_SYS_MX7_HCLK
+#else
+#define MXC_HCLK	24000000
+#endif
+
+#ifdef CONFIG_SYS_MX7_CLK32
+#define MXC_CLK32	CONFIG_SYS_MX7_CLK32
+#else
+#define MXC_CLK32	32768
+#endif
+
+/* Mainly for compatible to imx common code. */
+enum mxc_clock {
+	MXC_ARM_CLK = 0,
+	MXC_AHB_CLK,
+	MXC_IPG_CLK,
+	MXC_UART_CLK,
+	MXC_CSPI_CLK,
+	MXC_AXI_CLK,
+	MXC_DDR_CLK,
+	MXC_ESDHC_CLK,
+	MXC_ESDHC2_CLK,
+	MXC_ESDHC3_CLK,
+	MXC_I2C_CLK,
+};
+
+/* PLL supported by i.mx7d */
+enum pll_clocks {
+	PLL_CORE,	/* Core PLL */
+	PLL_SYS,	/* System PLL*/
+	PLL_ENET,	/* Enet PLL */
+	PLL_AUDIO,	/* Audio PLL */
+	PLL_VIDEO,	/* Video PLL*/
+	PLL_DDR,	/* Dram PLL */
+	PLL_USB,	/* USB PLL, fixed at 480MHZ */
+};
+
+/* clk src for clock root gen */
+enum clk_root_src {
+	OSC_24M_CLK,
+
+	PLL_ARM_MAIN_800M_CLK,
+
+	PLL_SYS_MAIN_480M_CLK,
+	PLL_SYS_MAIN_240M_CLK,
+	PLL_SYS_MAIN_120M_CLK,
+	PLL_SYS_PFD0_392M_CLK,
+	PLL_SYS_PFD0_196M_CLK,
+	PLL_SYS_PFD1_332M_CLK,
+	PLL_SYS_PFD1_166M_CLK,
+	PLL_SYS_PFD2_270M_CLK,
+	PLL_SYS_PFD2_135M_CLK,
+	PLL_SYS_PFD3_CLK,
+	PLL_SYS_PFD4_CLK,
+	PLL_SYS_PFD5_CLK,
+	PLL_SYS_PFD6_CLK,
+	PLL_SYS_PFD7_CLK,
+
+	PLL_ENET_MAIN_500M_CLK,
+	PLL_ENET_MAIN_250M_CLK,
+	PLL_ENET_MAIN_125M_CLK,
+	PLL_ENET_MAIN_100M_CLK,
+	PLL_ENET_MAIN_50M_CLK,
+	PLL_ENET_MAIN_40M_CLK,
+	PLL_ENET_MAIN_25M_CLK,
+
+	PLL_DRAM_MAIN_1066M_CLK,
+	PLL_DRAM_MAIN_533M_CLK,
+
+	PLL_AUDIO_MAIN_CLK,
+	PLL_VIDEO_MAIN_CLK,
+
+	PLL_USB_MAIN_480M_CLK,		/* fixed at 480MHZ */
+
+	EXT_CLK_1,
+	EXT_CLK_2,
+	EXT_CLK_3,
+	EXT_CLK_4,
+
+	REF_1M_CLK,
+	OSC_32K_CLK,
+};
+
+/*
+ * Clock root index
+ */
+enum clk_root_index {
+	ARM_A7_CLK_ROOT = 0,
+	ARM_M4_CLK_ROOT = 1,
+	ARM_M0_CLK_ROOT = 2,
+	MAIN_AXI_CLK_ROOT = 16,
+	DISP_AXI_CLK_ROOT = 17,
+	ENET_AXI_CLK_ROOT = 18,
+	NAND_USDHC_BUS_CLK_ROOT = 19,
+	AHB_CLK_ROOT = 32,
+	DRAM_PHYM_CLK_ROOT = 48,
+	DRAM_CLK_ROOT = 49,
+	DRAM_PHYM_ALT_CLK_ROOT = 64,
+	DRAM_ALT_CLK_ROOT = 65,
+	USB_HSIC_CLK_ROOT = 66,
+	PCIE_CTRL_CLK_ROOT = 67,
+	PCIE_PHY_CLK_ROOT = 68,
+	EPDC_PIXEL_CLK_ROOT = 69,
+	LCDIF_PIXEL_CLK_ROOT = 70,
+	MIPI_DSI_EXTSER_CLK_ROOT = 71,
+	MIPI_CSI_WARP_CLK_ROOT = 72,
+	MIPI_DPHY_REF_CLK_ROOT = 73,
+	SAI1_CLK_ROOT = 74,
+	SAI2_CLK_ROOT = 75,
+	SAI3_CLK_ROOT = 76,
+	SPDIF_CLK_ROOT = 77,
+	ENET1_REF_CLK_ROOT = 78,
+	ENET1_TIME_CLK_ROOT = 79,
+	ENET2_REF_CLK_ROOT = 80,
+	ENET2_TIME_CLK_ROOT = 81,
+	ENET_PHY_REF_CLK_ROOT = 82,
+	EIM_CLK_ROOT = 83,
+	NAND_CLK_ROOT = 84,
+	QSPI_CLK_ROOT = 85,
+	USDHC1_CLK_ROOT = 86,
+	USDHC2_CLK_ROOT = 87,
+	USDHC3_CLK_ROOT = 88,
+	CAN1_CLK_ROOT = 89,
+	CAN2_CLK_ROOT = 90,
+	I2C1_CLK_ROOT = 91,
+	I2C2_CLK_ROOT = 92,
+	I2C3_CLK_ROOT = 93,
+	I2C4_CLK_ROOT = 94,
+	UART1_CLK_ROOT = 95,
+	UART2_CLK_ROOT = 96,
+	UART3_CLK_ROOT = 97,
+	UART4_CLK_ROOT = 98,
+	UART5_CLK_ROOT = 99,
+	UART6_CLK_ROOT = 100,
+	UART7_CLK_ROOT = 101,
+	ECSPI1_CLK_ROOT = 102,
+	ECSPI2_CLK_ROOT = 103,
+	ECSPI3_CLK_ROOT = 104,
+	ECSPI4_CLK_ROOT = 105,
+	PWM1_CLK_ROOT = 106,
+	PWM2_CLK_ROOT = 107,
+	PWM3_CLK_ROOT = 108,
+	PWM4_CLK_ROOT = 109,
+	FLEXTIMER1_CLK_ROOT = 110,
+	FLEXTIMER2_CLK_ROOT = 111,
+	SIM1_CLK_ROOT = 112,
+	SIM2_CLK_ROOT = 113,
+	GPT1_CLK_ROOT = 114,
+	GPT2_CLK_ROOT = 115,
+	GPT3_CLK_ROOT = 116,
+	GPT4_CLK_ROOT = 117,
+	TRACE_CLK_ROOT = 118,
+	WDOG_CLK_ROOT = 119,
+	CSI_MCLK_CLK_ROOT = 120,
+	AUDIO_MCLK_CLK_ROOT = 121,
+	WRCLK_CLK_ROOT = 122,
+	IPP_DO_CLKO1 = 123,
+	IPP_DO_CLKO2 = 124,
+
+	CLK_ROOT_MAX,
+};
+
+struct clk_root_setting {
+	enum clk_root_index root;
+	u32 setting;
+};
+
+/*
+ * CCGR mapping
+ */
+enum clk_ccgr_index {
+	CCGR_CPU = 0,
+	CCGR_M4 = 1,
+	CCGR_SIM_MAIN = 4,
+	CCGR_SIM_DISPLAY = 5,
+	CCGR_SIM_ENET = 6,
+	CCGR_SIM_M = 7,
+	CCGR_SIM_S = 8,
+	CCGR_SIM_WAKEUP = 9,
+	CCGR_IPMUX1 = 10,
+	CCGR_IPMUX2 = 11,
+	CCGR_IPMUX3 = 12,
+	CCGR_ROM = 16,
+	CCGR_OCRAM = 17,
+	CCGR_OCRAM_S = 18,
+	CCGR_DRAM = 19,
+	CCGR_RAWNAND = 20,
+	CCGR_QSPI = 21,
+	CCGR_WEIM = 22,
+	CCGR_ADC = 32,
+	CCGR_ANATOP = 33,
+	CCGR_SCTR = 34,
+	CCGR_OCOTP = 35,
+	CCGR_CAAM = 36,
+	CCGR_SNVS = 37,
+	CCGR_RDC = 38,
+	CCGR_MU = 39,
+	CCGR_HS = 40,
+	CCGR_DVFS = 41,
+	CCGR_QOS = 42,
+	CCGR_QOS_DISPMIX = 43,
+	CCGR_QOS_MEGAMIX = 44,
+	CCGR_CSU = 45,
+	CCGR_DBGMON = 46,
+	CCGR_DEBUG = 47,
+	CCGR_TRACE = 48,
+	CCGR_SEC_DEBUG = 49,
+	CCGR_SEMA1 = 64,
+	CCGR_SEMA2 = 65,
+	CCGR_PERFMON1 = 68,
+	CCGR_PERFMON2 = 69,
+	CCGR_SDMA = 72,
+	CCGR_CSI = 73,
+	CCGR_EPDC = 74,
+	CCGR_LCDIF = 75,
+	CCGR_PXP = 76,
+	CCGR_PCIE = 96,
+	CCGR_MIPI_CSI = 100,
+	CCGR_MIPI_DSI = 101,
+	CCGR_MIPI_MEM_PHY = 102,
+	CCGR_USB_CTRL = 104,
+	CCGR_USB_HSIC = 105,
+	CCGR_USB_PHY1 = 106,
+	CCGR_USB_PHY2 = 107,
+	CCGR_USDHC1 = 108,
+	CCGR_USDHC2 = 109,
+	CCGR_USDHC3 = 110,
+	CCGR_ENET1 = 112,
+	CCGR_ENET2 = 113,
+	CCGR_CAN1 = 116,
+	CCGR_CAN2 = 117,
+	CCGR_ECSPI1 = 120,
+	CCGR_ECSPI2 = 121,
+	CCGR_ECSPI3 = 122,
+	CCGR_ECSPI4 = 123,
+	CCGR_GPT1 = 124,
+	CCGR_GPT2 = 125,
+	CCGR_GPT3 = 126,
+	CCGR_GPT4 = 127,
+	CCGR_FTM1 = 128,
+	CCGR_FTM2 = 129,
+	CCGR_PWM1 = 132,
+	CCGR_PWM2 = 133,
+	CCGR_PWM3 = 134,
+	CCGR_PWM4 = 135,
+	CCGR_I2C1 = 136,
+	CCGR_I2C2 = 137,
+	CCGR_I2C3 = 138,
+	CCGR_I2C4 = 139,
+	CCGR_SAI1 = 140,
+	CCGR_SAI2 = 141,
+	CCGR_SAI3 = 142,
+	CCGR_SIM1 = 144,
+	CCGR_SIM2 = 145,
+	CCGR_UART1 = 148,
+	CCGR_UART2 = 149,
+	CCGR_UART3 = 150,
+	CCGR_UART4 = 151,
+	CCGR_UART5 = 152,
+	CCGR_UART6 = 153,
+	CCGR_UART7 = 154,
+	CCGR_WDOG1 = 156,
+	CCGR_WDOG2 = 157,
+	CCGR_WDOG3 = 158,
+	CCGR_WDOG4 = 159,
+	CCGR_GPIO1 = 160,
+	CCGR_GPIO2 = 161,
+	CCGR_GPIO3 = 162,
+	CCGR_GPIO4 = 163,
+	CCGR_GPIO5 = 164,
+	CCGR_GPIO6 = 165,
+	CCGR_GPIO7 = 166,
+	CCGR_IOMUX = 168,
+	CCGR_IOMUX_LPSR = 169,
+	CCGR_KPP = 170,
+
+	CCGR_SKIP,
+	CCGR_MAX,
+};
+
+/* Clock root channel */
+enum clk_root_type {
+	CCM_CORE_CHANNEL,
+	CCM_BUS_CHANNEL,
+	CCM_AHB_CHANNEL,
+	CCM_DRAM_PHYM_CHANNEL,
+	CCM_DRAM_CHANNEL,
+	CCM_IP_CHANNEL,
+};
+
+#include <asm/arch/clock_slice.h>
+
+/*
+ * entry: the clock root index
+ * type: ccm channel
+ * src_mux: each entry corresponding to the clock src, detailed info in CCM RM
+ */
+struct clk_root_map {
+	enum clk_root_index entry;
+	enum clk_root_type type;
+	uint8_t src_mux[8];
+};
+
+enum enet_freq {
+	ENET_25MHz,
+	ENET_50MHz,
+	ENET_125MHz,
+};
+
+u32 get_root_clk(enum clk_root_index clock_id);
+u32 mxc_get_clock(enum mxc_clock clk);
+u32 imx_get_uartclk(void);
+u32 imx_get_fecclk(void);
+void clock_init(void);
+#ifdef CONFIG_SYS_I2C_MXC
+int enable_i2c_clk(unsigned char enable, unsigned i2c_num);
+#endif
+#ifdef CONFIG_FEC_MXC
+int set_clk_enet(enum enet_freq type);
+#endif
+int set_clk_qspi(void);
+int set_clk_nand(void);
+#ifdef CONFIG_MXC_OCOTP
+void enable_ocotp_clk(unsigned char enable);
+#endif
+void enable_usboh3_clk(unsigned char enable);
+#ifdef CONFIG_SECURE_BOOT
+void hab_caam_clock_enable(unsigned char enable);
+#endif
+void mxs_set_lcdclk(uint32_t base_addr, uint32_t freq);
+void enable_thermal_clk(void);
+#endif
diff --git a/arch/arm/include/asm/arch-mx7/clock_slice.h b/arch/arm/include/asm/arch-mx7/clock_slice.h
new file mode 100644
index 0000000000..6ede0cd1c9
--- /dev/null
+++ b/arch/arm/include/asm/arch-mx7/clock_slice.h
@@ -0,0 +1,116 @@
+/*
+ * Copyright (C) 2014-2015 Freescale Semiconductor, Inc.
+ *
+ * Author:
+ *	Peng Fan <Peng.Fan@freescale.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef _ASM_ARCH_CLOCK_SLICE_H
+#define _ASM_ARCH_CLOCK_SLICE_H
+
+enum root_pre_div {
+	CLK_ROOT_PRE_DIV1 = 0,
+	CLK_ROOT_PRE_DIV2,
+	CLK_ROOT_PRE_DIV3,
+	CLK_ROOT_PRE_DIV4,
+	CLK_ROOT_PRE_DIV5,
+	CLK_ROOT_PRE_DIV6,
+	CLK_ROOT_PRE_DIV7,
+	CLK_ROOT_PRE_DIV8,
+};
+
+enum root_post_div {
+	CLK_ROOT_POST_DIV1 = 0,
+	CLK_ROOT_POST_DIV2,
+	CLK_ROOT_POST_DIV3,
+	CLK_ROOT_POST_DIV4,
+	CLK_ROOT_POST_DIV5,
+	CLK_ROOT_POST_DIV6,
+	CLK_ROOT_POST_DIV7,
+	CLK_ROOT_POST_DIV8,
+	CLK_ROOT_POST_DIV9,
+	CLK_ROOT_POST_DIV10,
+	CLK_ROOT_POST_DIV11,
+	CLK_ROOT_POST_DIV12,
+	CLK_ROOT_POST_DIV13,
+	CLK_ROOT_POST_DIV14,
+	CLK_ROOT_POST_DIV15,
+	CLK_ROOT_POST_DIV16,
+	CLK_ROOT_POST_DIV17,
+	CLK_ROOT_POST_DIV18,
+	CLK_ROOT_POST_DIV19,
+	CLK_ROOT_POST_DIV20,
+	CLK_ROOT_POST_DIV21,
+	CLK_ROOT_POST_DIV22,
+	CLK_ROOT_POST_DIV23,
+	CLK_ROOT_POST_DIV24,
+	CLK_ROOT_POST_DIV25,
+	CLK_ROOT_POST_DIV26,
+	CLK_ROOT_POST_DIV27,
+	CLK_ROOT_POST_DIV28,
+	CLK_ROOT_POST_DIV29,
+	CLK_ROOT_POST_DIV30,
+	CLK_ROOT_POST_DIV31,
+	CLK_ROOT_POST_DIV32,
+	CLK_ROOT_POST_DIV33,
+	CLK_ROOT_POST_DIV34,
+	CLK_ROOT_POST_DIV35,
+	CLK_ROOT_POST_DIV36,
+	CLK_ROOT_POST_DIV37,
+	CLK_ROOT_POST_DIV38,
+	CLK_ROOT_POST_DIV39,
+	CLK_ROOT_POST_DIV40,
+	CLK_ROOT_POST_DIV41,
+	CLK_ROOT_POST_DIV42,
+	CLK_ROOT_POST_DIV43,
+	CLK_ROOT_POST_DIV44,
+	CLK_ROOT_POST_DIV45,
+	CLK_ROOT_POST_DIV46,
+	CLK_ROOT_POST_DIV47,
+	CLK_ROOT_POST_DIV48,
+	CLK_ROOT_POST_DIV49,
+	CLK_ROOT_POST_DIV50,
+	CLK_ROOT_POST_DIV51,
+	CLK_ROOT_POST_DIV52,
+	CLK_ROOT_POST_DIV53,
+	CLK_ROOT_POST_DIV54,
+	CLK_ROOT_POST_DIV55,
+	CLK_ROOT_POST_DIV56,
+	CLK_ROOT_POST_DIV57,
+	CLK_ROOT_POST_DIV58,
+	CLK_ROOT_POST_DIV59,
+	CLK_ROOT_POST_DIV60,
+	CLK_ROOT_POST_DIV61,
+	CLK_ROOT_POST_DIV62,
+	CLK_ROOT_POST_DIV63,
+	CLK_ROOT_POST_DIV64,
+};
+
+enum root_auto_div {
+	CLK_ROOT_AUTO_DIV1 = 0,
+	CLK_ROOT_AUTO_DIV2,
+	CLK_ROOT_AUTO_DIV4,
+	CLK_ROOT_AUTO_DIV8,
+	CLK_ROOT_AUTO_DIV16,
+};
+
+int clock_set_src(enum clk_root_index clock_id, enum clk_root_src clock_src);
+int clock_get_src(enum clk_root_index clock_id, enum clk_root_src *p_clock_src);
+int clock_set_prediv(enum clk_root_index clock_id, enum root_pre_div pre_div);
+int clock_get_prediv(enum clk_root_index clock_id, enum root_pre_div *pre_div);
+int clock_set_postdiv(enum clk_root_index clock_id, enum root_post_div div);
+int clock_get_postdiv(enum clk_root_index clock_id, enum root_post_div *div);
+int clock_set_autopostdiv(enum clk_root_index clock_id, enum root_auto_div div,
+			  int auto_en);
+int clock_get_autopostdiv(enum clk_root_index clock_id, enum root_auto_div *div,
+			  int *auto_en);
+int clock_get_target_val(enum clk_root_index clock_id, u32 *val);
+int clock_set_target_val(enum clk_root_index clock_id, u32 val);
+int clock_root_cfg(enum clk_root_index clock_id, enum root_pre_div pre_div,
+		   enum root_post_div post_div, enum clk_root_src clock_src);
+int clock_root_enabled(enum clk_root_index clock_id);
+
+int clock_enable(enum clk_ccgr_index index, bool enable);
+#endif