diff options
| author | Kane Chen <kane.chen@intel.com> | 2019-02-12 21:14:13 +0800 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2019-02-15 16:23:44 +0000 |
| commit | 223ddc298a1a8e25a493987d84c629ed152821d1 (patch) | |
| tree | 3dab78836d0483ad5e23709e142d258ba037002d | |
| parent | 1ac2ad0fbe8c1d7029e4f593fefe763212df6728 (diff) | |
soc/intel/skylake: Avoid TOL_1V8 being set for GPP_F4 ~ GPP_F11
According to doc 609208, bit 25 TOL_1V8 in GPP_F4 ~ GPP_F11 DW1
should be clear to prevent unexpected I2C behaviors.
BUG=b:124269499
TEST=boot on nami and check bit 25 TOL_1V8 is clear
Change-Id: I419ef3e89104ad3611e96bbe23a582504b45be0c
Signed-off-by: Kane Chen <kane.chen@intel.com>
Reviewed-on: https://review.coreboot.org/c/31368
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
| -rw-r--r-- | src/soc/intel/common/block/gpio/gpio.c | 9 | ||||
| -rw-r--r-- | src/soc/intel/common/block/include/intelblocks/gpio.h | 10 | ||||
| -rw-r--r-- | src/soc/intel/skylake/gpio.c | 15 |
3 files changed, 34 insertions, 0 deletions
diff --git a/src/soc/intel/common/block/gpio/gpio.c b/src/soc/intel/common/block/gpio/gpio.c index 6390315112..d77e052c96 100644 --- a/src/soc/intel/common/block/gpio/gpio.c +++ b/src/soc/intel/common/block/gpio/gpio.c @@ -273,6 +273,9 @@ static void gpio_configure_pad(const struct pad_config *cfg) soc_pad_conf &= mask[i]; soc_pad_conf |= pad_conf & ~mask[i]; + /* Patch GPIO settings for SoC specifically */ + soc_pad_conf = soc_gpio_pad_config_fixup(cfg, i, soc_pad_conf); + if (IS_ENABLED(CONFIG_DEBUG_GPIO)) printk(BIOS_DEBUG, "gpio_padcfg [0x%02x, %02zd] DW%d [0x%08x : 0x%08x" @@ -571,3 +574,9 @@ const char *gpio_acpi_path(gpio_t gpio_num) const struct pad_community *comm = gpio_get_community(gpio_num); return comm->acpi_path; } + +uint32_t __weak soc_gpio_pad_config_fixup(const struct pad_config *cfg, + int dw_reg, uint32_t reg_val) +{ + return reg_val; +} diff --git a/src/soc/intel/common/block/include/intelblocks/gpio.h b/src/soc/intel/common/block/include/intelblocks/gpio.h index c389ec4531..11a03d029c 100644 --- a/src/soc/intel/common/block/include/intelblocks/gpio.h +++ b/src/soc/intel/common/block/include/intelblocks/gpio.h @@ -197,5 +197,15 @@ void gpio_route_gpe(uint8_t gpe0b, uint8_t gpe0c, uint8_t gpe0d); */ uint8_t gpio_get_pad_portid(const gpio_t pad); +/* + * Function to patch GPIO settings for SoC specifically + * cfg = pad config contains pad number and reg value. + * dw_reg = pad config dword number. + * reg_val = the reg value need to be patched. + * Returns gpio setting patched for SoC specifically + */ +uint32_t soc_gpio_pad_config_fixup(const struct pad_config *cfg, + int dw_reg, uint32_t reg_val); + #endif #endif /* _SOC_INTELBLOCKS_GPIO_H_ */ diff --git a/src/soc/intel/skylake/gpio.c b/src/soc/intel/skylake/gpio.c index f67d4a3bb9..4da705da73 100644 --- a/src/soc/intel/skylake/gpio.c +++ b/src/soc/intel/skylake/gpio.c @@ -168,3 +168,18 @@ const struct pmc_to_gpio_route *soc_pmc_gpio_routes(size_t *num) *num = ARRAY_SIZE(routes); return routes; } + +uint32_t soc_gpio_pad_config_fixup(const struct pad_config *cfg, + int dw_reg, uint32_t reg_val) +{ + if (IS_ENABLED(CONFIG_SKYLAKE_SOC_PCH_H)) + return reg_val; + /* + * For U/Y series, clear PAD_CFG1_TOL_1V8 in GPP_F4 + * ~ GPP_F11. + */ + if (cfg->pad >= GPP_F4 && cfg->pad <= GPP_F11 && dw_reg == 1) + reg_val = reg_val & ~(PAD_CFG1_TOL_1V8); + return reg_val; + +} |