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 <h...@denx.de>
Cc: Tom Rini <tr...@ti.com>
---
On the dxr2 board the RTC32K_OSC it is not used, so disable it for
this board, done in the 5th patch of this patchserie
"arm-am335x-update-for-the-siemens-boards"
- changes for v3
rebase against current u-boot/master
509dca7a11aad394d781a9d31a7bfa6692562741
- changes for v2
none
---
README | 3 +++
arch/arm/cpu/armv7/am33xx/board.c | 4 ++++
include/configs/ti_am335x_common.h | 1 +
3 files changed, 8 insertions(+)
diff --git a/README b/README
index 1aeae7e..5fb835f 100644
--- a/README
+++ b/README
@@ -4325,6 +4325,9 @@ 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 a31bf40..7465ec5 100644
--- a/arch/arm/cpu/armv7/am33xx/board.c
+++ b/arch/arm/cpu/armv7/am33xx/board.c
@@ -148,6 +148,7 @@ __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 rtc_regs *rtc = (struct rtc_regs *)RTC_BASE;
@@ -163,6 +164,7 @@ 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)
{
@@ -231,8 +233,10 @@ 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 d2e34ae..3441b0a 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>
--
1.8.3.1
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