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| author | Michael Trimarchi <michael@amarulasolutions.com> | 2013-11-30 07:59:58 +0100 |
|---|---|---|
| committer | Tom Rini <trini@ti.com> | 2013-12-06 07:02:32 -0500 |
| commit | f33b9bd3984fb11e1d8566a866adc5957b1e1c9d (patch) | |
| tree | 18a16d2db234ce9d75b0cfabe57c86eae3c799aa | |
| parent | 74007b8519f4cfb4aa0f0af397ca71dde04172bf (diff) | |
| download | u-boot-imx-f33b9bd3984fb11e1d8566a866adc5957b1e1c9d.zip u-boot-imx-f33b9bd3984fb11e1d8566a866adc5957b1e1c9d.tar.gz u-boot-imx-f33b9bd3984fb11e1d8566a866adc5957b1e1c9d.tar.bz2 | |
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 <michael@amarulasolutions.com>
Cc: Igor Grinberg <grinberg@compulab.co.il>
Cc: Tom Rini <trini@ti.com>
Acked-by: Igor Grinberg <grinberg@compulab.co.il>
| -rw-r--r-- | arch/arm/cpu/armv7/omap3/clock.c | 2 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-omap3/clock.h | 2 |
2 files changed, 0 insertions, 4 deletions
diff --git a/arch/arm/cpu/armv7/omap3/clock.c b/arch/arm/cpu/armv7/omap3/clock.c index 9f989ff..ae9c4c3 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 be669c1..1912cc9 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 { |