On Thursday 05 November 2015 03:30 AM, Steve Kipisz wrote:
Many TI EVMs have capability to store relevant board information such as DDR description in EEPROM. Further many pad configuration variations can occur as part of revision changes in the platform. In-order to support these at runtime, we for a board detection hook which is available for override from board files that may desire to do so.
NOTE: All TI EVMs are capable of detecting board information based on early clocks that are configured. However, in case of additional needs this can be achieved within the override logic from within the board file.
Reviewed-by: Lokesh Vutla lokeshvutla@ti.com
Thanks and regards, Lokesh
Signed-off-by: Steve Kipisz s-kipisz2@ti.com Reviewed-by: Tom Rini trini@konsulko.com
v3 Based on: master 83bf0057 arm: at91: reworked meesc board support
Changes in v3 (since v2):
- No changes
v2: http://marc.info/?t=144655344600006&r=1&w=2 (mailing list squashed original submission)
Changes in v2:
- New patch
arch/arm/cpu/armv7/omap-common/hwinit-common.c | 11 +++++++++++ arch/arm/include/asm/arch-omap4/sys_proto.h | 1 + arch/arm/include/asm/arch-omap5/sys_proto.h | 1 + 3 files changed, 13 insertions(+)
diff --git a/arch/arm/cpu/armv7/omap-common/hwinit-common.c b/arch/arm/cpu/armv7/omap-common/hwinit-common.c index 91f2dead364b..9e9376d0e6e6 100644 --- a/arch/arm/cpu/armv7/omap-common/hwinit-common.c +++ b/arch/arm/cpu/armv7/omap-common/hwinit-common.c @@ -97,6 +97,16 @@ int arch_cpu_init(void) } #endif /* CONFIG_ARCH_CPU_INIT */
+/**
- do_board_detect() - Detect board description
- Function to detect board description. This is expected to be
- overridden in the SoC family board file where desired.
- */
+void __weak do_board_detect(void) +{ +}
/*
- Routine: s_init
- Description: Does early system init of watchdog, muxing, andclocks
@@ -128,6 +138,7 @@ void s_init(void) do_io_settings(); #endif setup_early_clocks();
- do_board_detect(); prcm_init();
}
diff --git a/arch/arm/include/asm/arch-omap4/sys_proto.h b/arch/arm/include/asm/arch-omap4/sys_proto.h index 26e9a194f036..fbb52093c65a 100644 --- a/arch/arm/include/asm/arch-omap4/sys_proto.h +++ b/arch/arm/include/asm/arch-omap4/sys_proto.h @@ -39,6 +39,7 @@ u32 wait_on_value(u32, u32, void *, u32); void sdelay(unsigned long); void setup_early_clocks(void); void prcm_init(void); +void do_board_detect(void); void bypass_dpll(u32 const base); void freq_update_core(void); u32 get_sys_clk_freq(void); diff --git a/arch/arm/include/asm/arch-omap5/sys_proto.h b/arch/arm/include/asm/arch-omap5/sys_proto.h index 18902628739b..23a33cb233bb 100644 --- a/arch/arm/include/asm/arch-omap5/sys_proto.h +++ b/arch/arm/include/asm/arch-omap5/sys_proto.h @@ -50,6 +50,7 @@ u32 wait_on_value(u32, u32, void *, u32); void sdelay(unsigned long); void setup_early_clocks(void); void prcm_init(void); +void do_board_detect(void); void bypass_dpll(u32 const base); void freq_update_core(void); u32 get_sys_clk_freq(void);