| From 03dcf584823b8b7db7d437257dbb45bd4b7f95b4 Mon Sep 17 00:00:00 2001 |
| From: Chanh Nguyen <chnguyen@amperecomputing.com> |
| Date: Mon, 21 Dec 2020 07:01:14 +0000 |
| Subject: [PATCH] aspeed/scu : Switch PWM pin to GPIO input mode |
| |
| In hardware design, the PWM pins will be at a high level if they are |
| configured in GPIO Input mode. This commit configures all PWM function |
| pins to input GPIO mode. This will allow fans to run at full speed when BMC resets or in U-boot. |
| |
| Signed-off-by: Chanh Nguyen <chnguyen@amperecomputing.com> |
| --- |
| arch/arm/include/asm/arch-aspeed/ast_scu.h | 1 + |
| arch/arm/mach-aspeed/ast-scu.c | 12 ++++++++++++ |
| board/aspeed/ast-g5/ast-g5.c | 10 ++++++++++ |
| include/configs/ast-g5-phy.h | 3 +++ |
| 4 files changed, 26 insertions(+) |
| |
| diff --git a/arch/arm/include/asm/arch-aspeed/ast_scu.h b/arch/arm/include/asm/arch-aspeed/ast_scu.h |
| index dcbc6730d4..d2c010a0dc 100644 |
| --- a/arch/arm/include/asm/arch-aspeed/ast_scu.h |
| +++ b/arch/arm/include/asm/arch-aspeed/ast_scu.h |
| @@ -45,5 +45,6 @@ extern u32 ast_scu_get_vga_memsize(void); |
| extern void ast_scu_init_eth(u8 num); |
| extern void ast_scu_multi_func_eth(u8 num); |
| extern void ast_scu_multi_func_romcs(u8 num); |
| +extern void ast_scu_switch_pwm_to_gpio_mode(void); |
| |
| #endif |
| diff --git a/arch/arm/mach-aspeed/ast-scu.c b/arch/arm/mach-aspeed/ast-scu.c |
| index 12de9b8036..ef90ef3805 100644 |
| --- a/arch/arm/mach-aspeed/ast-scu.c |
| +++ b/arch/arm/mach-aspeed/ast-scu.c |
| @@ -443,6 +443,18 @@ void ast_scu_multi_func_eth(u8 num) |
| } |
| } |
| |
| +void ast_scu_switch_pwm_to_gpio_mode(void) |
| +{ |
| + ast_scu_write(ast_scu_read(AST_SCU_FUN_PIN_CTRL3) & |
| + ~SCU_FUN_PIN_VPIG2 & |
| + ~SCU_FUN_PIN_VPIG3 & |
| + ~SCU_FUN_PIN_VPIG4 & |
| + ~SCU_FUN_PIN_VPIG5 & |
| + ~SCU_FUN_PIN_VPIG6 & |
| + ~SCU_FUN_PIN_VPIG7, |
| + AST_SCU_FUN_PIN_CTRL3); |
| +} |
| + |
| void ast_scu_multi_func_romcs(u8 num) |
| { |
| ast_scu_write(ast_scu_read(AST_SCU_FUN_PIN_CTRL3) | |
| diff --git a/board/aspeed/ast-g5/ast-g5.c b/board/aspeed/ast-g5/ast-g5.c |
| index e67a4bf8b2..fba22a728e 100644 |
| --- a/board/aspeed/ast-g5/ast-g5.c |
| +++ b/board/aspeed/ast-g5/ast-g5.c |
| @@ -24,6 +24,16 @@ int board_init(void) |
| return 0; |
| } |
| |
| +#ifdef CONFIG_BOARD_LATE_INIT |
| +int board_late_init(void) |
| +{ |
| + /* Switch PWM to GPIO mode to make FAN run in max speed */ |
| + ast_scu_switch_pwm_to_gpio_mode(); |
| + |
| + return 0; |
| +} |
| +#endif |
| + |
| int dram_init(void) |
| { |
| u32 vga = ast_scu_get_vga_memsize(); |
| diff --git a/include/configs/ast-g5-phy.h b/include/configs/ast-g5-phy.h |
| index 62ddb841e5..5443a26cab 100644 |
| --- a/include/configs/ast-g5-phy.h |
| +++ b/include/configs/ast-g5-phy.h |
| @@ -30,4 +30,7 @@ |
| /* platform.S */ |
| #define CONFIG_DRAM_ECC_SIZE 0x10000000 |
| |
| +/* Call board_late_init */ |
| +#define CONFIG_BOARD_LATE_INIT 1 |
| + |
| #endif /* __AST_G5_PHY_CONFIG_H */ |
| -- |
| 2.25.1 |
| |