diff options
Diffstat (limited to 'meta-openbmc-mods/meta-ast2500/recipes-bsp/u-boot/files/0013-aspeed-Add-Pwm-Driver.patch')
| -rw-r--r-- | meta-openbmc-mods/meta-ast2500/recipes-bsp/u-boot/files/0013-aspeed-Add-Pwm-Driver.patch | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/meta-openbmc-mods/meta-ast2500/recipes-bsp/u-boot/files/0013-aspeed-Add-Pwm-Driver.patch b/meta-openbmc-mods/meta-ast2500/recipes-bsp/u-boot/files/0013-aspeed-Add-Pwm-Driver.patch new file mode 100644 index 000000000..6a3132adb --- /dev/null +++ b/meta-openbmc-mods/meta-ast2500/recipes-bsp/u-boot/files/0013-aspeed-Add-Pwm-Driver.patch @@ -0,0 +1,139 @@ +From 118b202b435df8b9a8bdee296289fd42c4a95959 Mon Sep 17 00:00:00 2001 +From: Vernon Mauery <vernon.mauery@linux.intel.com> +Date: Fri, 16 Nov 2018 15:57:57 -0800 +Subject: [PATCH] aspeed: add Pwm Driver + +Change-Id: Ia8b80212f7c70aafcc6a71782936ec95cf9b7f38 +Signed-off-by: James Feist <james.feist@linux.intel.com> + +--- + board/aspeed/ast-g5/ast-g5-intel.c | 113 +++++++++++++++++++++++++++++ + 1 file changed, 113 insertions(+) + +diff --git a/board/aspeed/ast-g5/ast-g5-intel.c b/board/aspeed/ast-g5/ast-g5-intel.c +index e27b538fcc..a6cad69b1e 100644 +--- a/board/aspeed/ast-g5/ast-g5-intel.c ++++ b/board/aspeed/ast-g5/ast-g5-intel.c +@@ -260,9 +260,122 @@ int intel_force_firmware_jumper_enabled(void) + return gpio_get_value(GPIO_FF_UPD_JUMPER); + } + ++/* PWM offsets */ ++ ++#define PWM_BASE_ADDR 0x1E786000 ++#define PWM_CONTROL 0x00 ++#define PWM_CLOCK_SELECTION 0x04 ++#define PWM_DUTY_CYCLE 0x08 ++#define PWM_M0 0x10 ++#define PWM_M1 0x14 ++#define PWM_N0 0x18 ++#define PWM_N1 0x1c ++#define PWM_CONTROL_EXT 0x40 ++#define PWM_CLOCK_SEL_EXT 0x44 ++#define PWM_O0 0x50 ++#define PWM_O1 0x54 ++#define PWM_CHANNEL_COUNT 8 ++ ++#define PWM_CLK_ENABLE BIT(0) ++#define PWM_DUTY(PCT) (((PCT) * 128) / 100) ++#define DEFAULT_PWM_DUTY_VALUE PWM_DUTY(57) ++ ++ ++static inline uint32_t ast_scu_read(uint32_t reg) ++{ ++ uint32_t val = readl(AST_SCU_BASE + reg); ++ ++ debug("ast_scu_read : reg = 0x%08x, val = 0x%08x\n", reg, val); ++ return val; ++} ++ ++static inline void ast_scu_write(uint32_t val, uint32_t reg) ++{ ++ debug("ast_scu_write : reg = 0x%08x, val = 0x%08x\n", reg, val); ++ ++ writel(SCU_PROTECT_UNLOCK, AST_SCU_BASE); ++ writel(val, AST_SCU_BASE + reg); ++#ifdef CONFIG_AST_SCU_LOCK ++ writel(0xaa, AST_SCU_BASE); ++#endif ++} ++ ++static void set_pwm_duty_cycle(int duty) ++{ ++ uint32_t chan; ++ uint32_t val; ++ ++ /* enable pwm channels */ ++ for (chan = 0; chan < PWM_CHANNEL_COUNT; chan++) { ++ uint32_t base = chan < 4 ? PWM_BASE_ADDR : PWM_BASE_ADDR + 0x40; ++ uint8_t ch_duty_shift = 16 * (chan & 0x1); ++ uint8_t ch_pair = (chan & 0x3) / 2; ++ ++ /* enable pwm for the channel */ ++ val = readl(base); ++ val |= ((1 << (chan & 0x3)) << 8); ++ writel(val, base); ++ ++ /* set duty cycle */ ++ val = readl(base + PWM_DUTY_CYCLE + ch_pair * 4); ++ val &= ~(0xffff << ch_duty_shift); ++ val |= (((uint32_t)duty) << 8) << ch_duty_shift; ++ writel(val, base + PWM_DUTY_CYCLE + ch_pair * 4); ++ } ++ ++} ++ ++static void pwm_init(void) ++{ ++ uint32_t val; ++ ++ /* select pwm 0-7 */ ++ val = ast_scu_read(AST_SCU_FUN_PIN_CTRL3); ++ val |= (SCU_FUN_PIN_VPIG7 | SCU_FUN_PIN_VPIG6 | SCU_FUN_PIN_VPIG5 ++ | SCU_FUN_PIN_VPIG4 | SCU_FUN_PIN_VPIG3 | SCU_FUN_PIN_VPIG2 ++ | SCU_FUN_PIN_VPIG1 | SCU_FUN_PIN_VPIG0); ++ ast_scu_write(val, AST_SCU_FUN_PIN_CTRL3); ++ ++ /* disable video output mux */ ++ val = ast_scu_read(AST_SCU_FUN_PIN_CTRL5); ++ val &= 0xffffffcf; ++ ast_scu_write(val, AST_SCU_FUN_PIN_CTRL5); ++ val = readl(AST_SCU_FUN_PIN_CTRL6); ++ val &= 0xfffffffc; ++ ast_scu_write(val, AST_SCU_FUN_PIN_CTRL6); ++ ++ /* SCU reset of PWM module */ ++ val = ast_scu_read(AST_SCU_RESET); ++ val |= SCU_RESET_PWM; ++ ast_scu_write(val, AST_SCU_RESET); ++ val &= ~SCU_RESET_PWM; ++ ast_scu_write(val, AST_SCU_RESET); ++ ++ /* set M, N, and 0 clock regs to 0 */ ++ writel(0, PWM_BASE_ADDR + PWM_M0); ++ writel(0, PWM_BASE_ADDR + PWM_N0); ++ writel(0, PWM_BASE_ADDR + PWM_O0); ++ ++ /* disable fans and tachos, set M type control */ ++ writel(0x1, PWM_BASE_ADDR + PWM_CONTROL); ++ writel(0x1, PWM_BASE_ADDR + PWM_CONTROL_EXT); ++ ++ set_pwm_duty_cycle(DEFAULT_PWM_DUTY_VALUE); ++ ++ /* set up clock type M: period = 127 units at 24MHz/8 (resulting ~23kHz period) */ ++ writel(0x7f30, PWM_BASE_ADDR + PWM_CLOCK_SELECTION); ++ ++ /* enable pwm-tacho */ ++ ++ val = readl(PWM_BASE_ADDR + PWM_CONTROL); ++ val |= PWM_CLK_ENABLE; ++ writel(val, PWM_BASE_ADDR + PWM_CONTROL); ++} ++ + extern void espi_init(void); + void ast_g5_intel(void) + { ++ pwm_init(); + gpio_init(gpio_table, ARRAY_SIZE(gpio_table)); + espi_init(); + sgpio_init(); |