From e3ee4be3210a79e39af9b15077f0b119095ee52f Mon Sep 17 00:00:00 2001 From: Krzysztof Kozlowski Date: Wed, 6 Mar 2019 19:37:51 +0100 Subject: [PATCH] arm: exynos: Detect revision later, when all resources are ready Detection of board revision is done early - before power setup. In case of Odroid XU3/XU4/HC1 family, the detection is done using ADC which is supplied by LDO4/VDD_ADC regulator. This regulator could be turned off (e.g. by kernel before reboot). If ADC is used early, the regulators are not yet available and the detection won't work. Split the revision detection out of set_board_type() into separate function called later - either when displaying board info (in late mode) or during misc_init_r. The idea is that set_board_type() will be called early so its method of detection are limited to flattened device tree (exynos5-dt-types.c for Exynos5) or GPIO (odroid.c for Exynos4412). The newly added set_board_revision() can be called only later, when resources like regulator are available. This is necessary to fix the detection of Odroid HC1 after reboot, if kernel turned off the LDO4 regulator. Signed-off-by: Krzysztof Kozlowski Reviewed-by: Lukasz Majewski Tested-by: Anand Moon Signed-off-by: Minkyu Kang --- board/samsung/common/board.c | 23 ++++++++++++++++++++++- board/samsung/common/exynos5-dt-types.c | 16 +++++++++++++--- board/samsung/odroid/odroid.c | 8 ++++++++ include/samsung/misc.h | 1 + 4 files changed, 44 insertions(+), 4 deletions(-) diff --git a/board/samsung/common/board.c b/board/samsung/common/board.c index 96228a86a1..58ecb22d75 100644 --- a/board/samsung/common/board.c +++ b/board/samsung/common/board.c @@ -253,7 +253,18 @@ int board_eth_init(bd_t *bis) int checkboard(void) { if (IS_ENABLED(CONFIG_BOARD_TYPES)) { - const char *board_info = get_board_type(); + const char *board_info; + + if (IS_ENABLED(CONFIG_DISPLAY_BOARDINFO_LATE)) { + /* + * Printing type requires having revision, although + * this will succeed only if done late. + * Otherwise revision will be set in misc_init_r(). + */ + set_board_revision(); + } + + board_info = get_board_type(); if (board_info) printf("Type: %s\n", board_info); @@ -287,6 +298,16 @@ int board_late_init(void) #ifdef CONFIG_MISC_INIT_R int misc_init_r(void) { + if (IS_ENABLED(CONFIG_BOARD_TYPES) && + !IS_ENABLED(CONFIG_DISPLAY_BOARDINFO_LATE)) { + /* + * If revision was not set by late display boardinfo, + * set it here. At this point regulators should be already + * available. + */ + set_board_revision(); + } + #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG set_board_info(); #endif diff --git a/board/samsung/common/exynos5-dt-types.c b/board/samsung/common/exynos5-dt-types.c index 7a86e91877..7c1271d654 100644 --- a/board/samsung/common/exynos5-dt-types.c +++ b/board/samsung/common/exynos5-dt-types.c @@ -192,8 +192,11 @@ const char *get_board_type(void) /** * set_board_type() - set board type in gd->board_type. - * As default type set EXYNOS5_BOARD_GENERIC, if detect Odroid, - * then set its proper type. + * As default type set EXYNOS5_BOARD_GENERIC. If Odroid is detected, + * set its proper type based on device tree. + * + * This might be called early when some more specific ways to detect revision + * are not yet available. */ void set_board_type(void) { @@ -211,8 +214,15 @@ void set_board_type(void) gd->board_type = of_match->data; break; } +} - /* If Odroid, then check its revision */ +/** + * set_board_revision() - set detailed board type in gd->board_type. + * Should be called when resources (e.g. regulators) are available + * so ADC can be used to detect the specific revision of a board. + */ +void set_board_revision(void) +{ if (board_is_odroidxu3()) gd->board_type = odroid_get_board_type(); } diff --git a/board/samsung/odroid/odroid.c b/board/samsung/odroid/odroid.c index 552333fe86..4be8cc9826 100644 --- a/board/samsung/odroid/odroid.c +++ b/board/samsung/odroid/odroid.c @@ -54,6 +54,14 @@ void set_board_type(void) gd->board_type = ODROID_TYPE_U3; } +void set_board_revision(void) +{ + /* + * Revision already set by set_board_type() because it can be + * executed early. + */ +} + const char *get_board_type(void) { const char *board_type[] = {"u3", "x2"}; diff --git a/include/samsung/misc.h b/include/samsung/misc.h index 017560c256..4ff28a1df0 100644 --- a/include/samsung/misc.h +++ b/include/samsung/misc.h @@ -33,6 +33,7 @@ char *get_dfu_alt_system(char *interface, char *devstr); char *get_dfu_alt_boot(char *interface, char *devstr); #endif void set_board_type(void); +void set_board_revision(void); const char *get_board_type(void); #endif /* __SAMSUNG_MISC_COMMON_H__ */