diff options
| author | Heiko Schocher <hs@denx.de> | 2013-11-04 14:05:00 +0100 |
|---|---|---|
| committer | Tom Rini <trini@ti.com> | 2013-11-11 12:16:30 -0500 |
| commit | 16678eb40f287067dd8ad5a4e5208fbfe94e0e76 (patch) | |
| tree | ab8b73eade6f2b5afaa29b9db3a2e205d7968049 | |
| parent | eda0ba38a8dfd2572089bd229a027d497c340158 (diff) | |
| download | u-boot-16678eb40f287067dd8ad5a4e5208fbfe94e0e76.tar.gz | |
arm, am33x: make RTC32K OSC enable configurable
As
http://www.denx.de/wiki/view/U-Boot/DesignPrinciples#2_Keep_it_Fast
states:
"Initialize devices only when they are needed within U-Boot"
enable the RTC32K OSC only, if CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC is
enabled. Enable this in ti_am335x_common.h, so all boards in mainline
should work as before.
Signed-off-by: Heiko Schocher <hs@denx.de>
Cc: Tom Rini <trini@ti.com>
| -rw-r--r-- | README | 3 | ||||
| -rw-r--r-- | arch/arm/cpu/armv7/am33xx/board.c | 4 | ||||
| -rw-r--r-- | include/configs/ti_am335x_common.h | 1 |
3 files changed, 8 insertions, 0 deletions
@@ -4319,6 +4319,9 @@ Low Level (hardware related) configuration options: NOTE : currently only supported on AM335x platforms. +- CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC: + Enables the RTC32K OSC on AM33xx based plattforms + Freescale QE/FMAN Firmware Support: ----------------------------------- diff --git a/arch/arm/cpu/armv7/am33xx/board.c b/arch/arm/cpu/armv7/am33xx/board.c index 453effa541..803aa9c545 100644 --- a/arch/arm/cpu/armv7/am33xx/board.c +++ b/arch/arm/cpu/armv7/am33xx/board.c @@ -149,6 +149,7 @@ __weak void am33xx_spl_board_init(void) do_setup_dpll(&dpll_mpu_regs, &dpll_mpu_opp100); } +#if defined(CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC) static void rtc32k_enable(void) { struct davinci_rtc *rtc = (struct davinci_rtc *)RTC_BASE; @@ -164,6 +165,7 @@ static void rtc32k_enable(void) /* Enable the RTC 32K OSC by setting bits 3 and 6. */ writel((1 << 3) | (1 << 6), &rtc->osc); } +#endif static void uart_soft_reset(void) { @@ -232,8 +234,10 @@ void s_init(void) #if defined(CONFIG_SPL_BUILD) || defined(CONFIG_NOR_BOOT) prcm_init(); set_mux_conf_regs(); +#if defined(CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC) /* Enable RTC32K clock */ rtc32k_enable(); +#endif sdram_init(); #endif } diff --git a/include/configs/ti_am335x_common.h b/include/configs/ti_am335x_common.h index 10fe47f4d6..0f6fa6254f 100644 --- a/include/configs/ti_am335x_common.h +++ b/include/configs/ti_am335x_common.h @@ -18,6 +18,7 @@ #define CONFIG_SYS_CACHELINE_SIZE 64 #define CONFIG_MAX_RAM_BANK_SIZE (1024 << 20) /* 1GB */ #define CONFIG_SYS_TIMERBASE 0x48040000 /* Use Timer2 */ +#define CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC #include <asm/arch/omap.h> |