From f33b9bd3984fb11e1d8566a866adc5957b1e1c9d Mon Sep 17 00:00:00 2001 From: Michael Trimarchi Date: Sat, 30 Nov 2013 07:59:58 +0100 Subject: [PATCH] arm: omap3: Enable clocks for peripherals only if they are used This patch change the per_clocks_enable() function used in OMAP3 code to enable peripherals clocks. Only required clock should be activated. So if the board use the uart(x) as a console we need to activate it. The Board's config should include define to enable every subsystem that the board use. For a complete list of affected peripherals, registers CM_FCLKEN_PER and CM_ICLKEN_PER should be checked. Right now the bootloader can enable and disable clocks for: uart(x) using CONFIG_SYS_NS16550 gpio bank (x) using CONFIG_OMAP3_GPIO_X with X = { 2, 3, 4, 5, 6 } i2c bus using CONFIG_DRIVER_OMAP34XX_I2C. Not required gptimer(x) and mcbsp(x) for booting are disabled by default and are not supported by any define. Their activation need to included in the per_clocks_enable if the peripheral is included. Not booting board should enable the peripheral clock connected to their driver Signed-off-by: Michael Trimarchi Cc: Igor Grinberg Cc: Tom Rini Acked-by: Igor Grinberg --- arch/arm/cpu/armv7/omap3/clock.c | 2 -- arch/arm/include/asm/arch-omap3/clock.h | 2 -- 2 files changed, 4 deletions(-) diff --git a/arch/arm/cpu/armv7/omap3/clock.c b/arch/arm/cpu/armv7/omap3/clock.c index 9f989ff860..ae9c4c318f 100644 --- a/arch/arm/cpu/armv7/omap3/clock.c +++ b/arch/arm/cpu/armv7/omap3/clock.c @@ -730,8 +730,6 @@ void per_clocks_enable(void) sr32(&prcm_base->fclken_cam, 0, 32, FCK_CAM_ON); sr32(&prcm_base->iclken_cam, 0, 32, ICK_CAM_ON); } - sr32(&prcm_base->fclken_per, 0, 32, FCK_PER_ON); - sr32(&prcm_base->iclken_per, 0, 32, ICK_PER_ON); sdelay(1000); } diff --git a/arch/arm/include/asm/arch-omap3/clock.h b/arch/arm/include/asm/arch-omap3/clock.h index be669c156f..1912cc9a67 100644 --- a/arch/arm/include/asm/arch-omap3/clock.h +++ b/arch/arm/include/asm/arch-omap3/clock.h @@ -27,8 +27,6 @@ #define ICK_DSS_ON 0x00000001 #define FCK_CAM_ON 0x00000001 #define ICK_CAM_ON 0x00000001 -#define FCK_PER_ON 0x0003ffff -#define ICK_PER_ON 0x0003ffff /* Used to index into DPLL parameter tables */ typedef struct {