diff options
Diffstat (limited to 'arch/arm/mach-imx/include/mach/imx7-ccm-regs.h')
| -rw-r--r-- | arch/arm/mach-imx/include/mach/imx7-ccm-regs.h | 45 |
1 files changed, 36 insertions, 9 deletions
diff --git a/arch/arm/mach-imx/include/mach/imx7-ccm-regs.h b/arch/arm/mach-imx/include/mach/imx7-ccm-regs.h index 43b9425df2..de6eb1bbd1 100644 --- a/arch/arm/mach-imx/include/mach/imx7-ccm-regs.h +++ b/arch/arm/mach-imx/include/mach/imx7-ccm-regs.h @@ -1,21 +1,48 @@ #ifndef __MACH_IMX7_CCM_REGS_H__ #define __MACH_IMX7_CCM_REGS_H__ -#include "ccm.h" +#define IMX7_CCM_CCGR_UART1 148 +#define IMX7_CCM_CCGR_UART2 149 -#define CCM_CCGR_UART1 148 -#define CCM_CCGR_UART2 149 - -#define CLOCK_ROOT_INDEX(x) (((x) - 0x8000) / 128) +#define IMX7_CLOCK_ROOT_INDEX(x) (((x) - 0x8000) / 128) /* * Taken from "Table 5-11. Clock Root Table" from i.MX7 Dual Processor * Reference Manual */ -#define UART1_CLK_ROOT CLOCK_ROOT_INDEX(0xaf80) -#define UART1_CLK_ROOT__OSC_24M CCM_TARGET_ROOTn_MUX(0b000) +#define IMX7_UART1_CLK_ROOT IMX7_CLOCK_ROOT_INDEX(0xaf80) +#define IMX7_UART1_CLK_ROOT__OSC_24M IMX7_CCM_TARGET_ROOTn_MUX(0b000) + +#define IMX7_UART2_CLK_ROOT IMX7_CLOCK_ROOT_INDEX(0xb000) +#define IMX7_UART2_CLK_ROOT__OSC_24M IMX7_CCM_TARGET_ROOTn_MUX(0b000) + +/* 0 <= n <= 190 */ +#define IMX7_CCM_CCGRn_SET(n) (0x4004 + 16 * (n)) +#define IMX7_CCM_CCGRn_CLR(n) (0x4008 + 16 * (n)) + +/* 0 <= n <= 120 */ +#define IMX7_CCM_TARGET_ROOTn(n) (0x8000 + 128 * (n)) + +#define IMX7_CCM_TARGET_ROOTn_MUX(x) ((x) << 24) +#define IMX7_CCM_TARGET_ROOTn_ENABLE BIT(28) + + +#define IMX7_CCM_CCGR_SETTINGn(n, s) ((s) << ((n) * 4)) +#define IMX7_CCM_CCGR_SETTINGn_NOT_NEEDED(n) IMX7_CCM_CCGR_SETTINGn(n, 0b00) +#define IMX7_CCM_CCGR_SETTINGn_NEEDED_RUN(n) IMX7_CCM_CCGR_SETTINGn(n, 0b01) +#define IMX7_CCM_CCGR_SETTINGn_NEEDED_RUN_WAIT(n) IMX7_CCM_CCGR_SETTINGn(n, 0b10) +#define IMX7_CCM_CCGR_SETTINGn_NEEDED(n) IMX7_CCM_CCGR_SETTINGn(n, 0b11) + +static inline void imx7_early_setup_uart_clock(void) +{ + void __iomem *ccm = IOMEM(MX7_CCM_BASE_ADDR); -#define UART2_CLK_ROOT CLOCK_ROOT_INDEX(0xb000) -#define UART2_CLK_ROOT__OSC_24M CCM_TARGET_ROOTn_MUX(0b000) + writel(IMX7_CCM_CCGR_SETTINGn_NEEDED(0), + ccm + IMX7_CCM_CCGRn_CLR(IMX7_CCM_CCGR_UART1)); + writel(IMX7_CCM_TARGET_ROOTn_ENABLE | IMX7_UART1_CLK_ROOT__OSC_24M, + ccm + IMX7_CCM_TARGET_ROOTn(IMX7_UART1_CLK_ROOT)); + writel(IMX7_CCM_CCGR_SETTINGn_NEEDED(0), + ccm + IMX7_CCM_CCGRn_SET(IMX7_CCM_CCGR_UART1)); +} #endif |