Aaron Durbin (adurbin@google.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/4971
-gerrit
commit a63af012a1b89beff337d8b0cb78e7e648eac973 Author: Shawn Nematbakhsh shawnn@chromium.org Date: Wed Nov 13 15:37:11 2013 -0800
baytrail: gpio: Make pad input/output state mutually exclusive
Previously pads were being configured as both input and output simultaneously due to the config bits being active low. Create new defines that only enable either input or output, and use them in our GPIO configs.
BUG=chrome-os-partner:22863 TEST=Manual on Rambi. Verify system boots and peripherals still function. BRANCH=None.
Change-Id: If386682a3d810864b7b9f5d2aecdb2e6cfceea86 Signed-off-by: Shawn Nematbakhsh shawnn@chromium.org Reviewed-on: https://chromium-review.googlesource.com/176725 Reviewed-by: Aaron Durbin adurbin@chromium.org Signed-off-by: Aaron Durbin adurbin@chromium.org --- src/soc/intel/baytrail/baytrail/gpio.h | 24 ++++++++++++++---------- 1 file changed, 14 insertions(+), 10 deletions(-)
diff --git a/src/soc/intel/baytrail/baytrail/gpio.h b/src/soc/intel/baytrail/baytrail/gpio.h index 154ac84..bdb33f1 100644 --- a/src/soc/intel/baytrail/baytrail/gpio.h +++ b/src/soc/intel/baytrail/baytrail/gpio.h @@ -143,13 +143,17 @@ #define PAD_VAL_OUTPUT_DISABLE (1 << 1) #define PAD_VAL_OUTPUT_ENABLE (0 << 1)
+/* Input / Output state should usually be mutually exclusive */ +#define PAD_VAL_INPUT (PAD_VAL_INPUT_ENABLE | PAD_VAL_OUTPUT_DISABLE) +#define PAD_VAL_OUTPUT (PAD_VAL_OUTPUT_ENABLE | PAD_VAL_INPUT_DISABLE) + /* pad_val[0] - Value */ #define PAD_VAL_HIGH (1 << 0) #define PAD_VAL_LOW (0 << 0)
/* pad_val reg power-on default varies by pad, and apparently can cause issues * if not set correctly, even if the pin isn't configured as GPIO. */ -#define PAD_VAL_DEFAULT (PAD_VAL_INPUT_ENABLE | PAD_VAL_OUTPUT_DISABLE) +#define PAD_VAL_DEFAULT PAD_VAL_INPUT
/* Configure GPIOs as legacy by default. GPNCORE doesn't support * legacy config -- so also configure the pad regs as GPIO. We rely upon @@ -158,7 +162,7 @@ { .pad_conf0 = PAD_PU_10K | PAD_PULL_UP | PAD_CONFIG0_DEFAULT \ | PAD_FUNC0, \ .pad_conf1 = PAD_CONFIG1_DEFAULT, \ - .pad_val = PAD_VAL_INPUT_ENABLE, \ + .pad_val = PAD_VAL_INPUT, \ .use_sel = GPIO_USE_LEGACY, \ .io_sel = GPIO_DIR_INPUT }
@@ -166,7 +170,7 @@ { .pad_conf0 = PAD_PU_10K | PAD_PULL_DOWN | PAD_CONFIG0_DEFAULT \ | PAD_FUNC0, \ .pad_conf1 = PAD_CONFIG1_DEFAULT, \ - .pad_val = PAD_VAL_INPUT_ENABLE, \ + .pad_val = PAD_VAL_INPUT, \ .use_sel = GPIO_USE_LEGACY, \ .io_sel = GPIO_DIR_INPUT }
@@ -174,7 +178,7 @@ { .pad_conf0 = PAD_PU_10K | PAD_PULL_DISABLE | PAD_CONFIG0_DEFAULT \ | PAD_FUNC0, \ .pad_conf1 = PAD_CONFIG1_DEFAULT, \ - .pad_val = PAD_VAL_INPUT_ENABLE, \ + .pad_val = PAD_VAL_INPUT, \ .use_sel = GPIO_USE_LEGACY, \ .io_sel = GPIO_DIR_INPUT }
@@ -183,7 +187,7 @@ { .pad_conf0 = PAD_PU_10K | PAD_PULL_DISABLE | PAD_CONFIG0_DEFAULT \ | PAD_FUNC0 | PAD_IRQ_EN | PAD_TNE_IRQ, \ .pad_conf1 = PAD_CONFIG1_DEFAULT, \ - .pad_val = PAD_VAL_INPUT_ENABLE, \ + .pad_val = PAD_VAL_INPUT, \ .use_sel = GPIO_USE_LEGACY, \ .io_sel = GPIO_DIR_INPUT, \ .tne = GPIO_NEDGE_ENABLE } @@ -193,7 +197,7 @@ { .pad_conf0 = PAD_PU_10K | PAD_PULL_DISABLE | PAD_CONFIG0_DEFAULT \ | PAD_FUNC0 | PAD_IRQ_EN | PAD_TPE_IRQ, \ .pad_conf1 = PAD_CONFIG1_DEFAULT, \ - .pad_val = PAD_VAL_INPUT_ENABLE, \ + .pad_val = PAD_VAL_INPUT, \ .use_sel = GPIO_USE_LEGACY, \ .io_sel = GPIO_DIR_INPUT, \ .tne = GPIO_PEDGE_ENABLE } @@ -202,7 +206,7 @@ { .pad_conf0 = PAD_PULL_DISABLE | PAD_CONFIG0_DEFAULT \ | PAD_FUNC0, \ .pad_conf1 = PAD_CONFIG1_DEFAULT, \ - .pad_val = PAD_VAL_OUTPUT_ENABLE | PAD_VAL_LOW, \ + .pad_val = PAD_VAL_OUTPUT | PAD_VAL_LOW, \ .use_sel = GPIO_USE_LEGACY, \ .io_sel = GPIO_DIR_OUTPUT, \ .gp_lvl = GPIO_LEVEL_LOW } @@ -211,7 +215,7 @@ { .pad_conf0 = PAD_PULL_DISABLE | PAD_CONFIG0_DEFAULT \ | PAD_FUNC0, \ .pad_conf1 = PAD_CONFIG1_DEFAULT, \ - .pad_val = PAD_VAL_OUTPUT_ENABLE | PAD_VAL_HIGH, \ + .pad_val = PAD_VAL_OUTPUT | PAD_VAL_HIGH, \ .use_sel = GPIO_USE_LEGACY, \ .io_sel = GPIO_DIR_OUTPUT, \ .gp_lvl = GPIO_LEVEL_HIGH } @@ -238,7 +242,7 @@ #define GPIO_ACPI_SCI \ { .pad_conf0 = PAD_PULL_DISABLE | PAD_CONFIG0_DEFAULT | PAD_FUNC0, \ .pad_conf1 = PAD_CONFIG1_DEFAULT, \ - .pad_val = PAD_VAL_INPUT_ENABLE, \ + .pad_val = PAD_VAL_INPUT, \ .use_sel = GPIO_USE_LEGACY, \ .io_sel = GPIO_DIR_INPUT, \ .tne = 1, \ @@ -246,7 +250,7 @@ #define GPIO_ACPI_SMI \ { .pad_conf0 = PAD_PULL_DISABLE | PAD_CONFIG0_DEFAULT | PAD_FUNC0, \ .pad_conf1 = PAD_CONFIG1_DEFAULT, \ - .pad_val = PAD_VAL_INPUT_ENABLE, \ + .pad_val = PAD_VAL_INPUT, \ .use_sel = GPIO_USE_LEGACY, \ .io_sel = GPIO_DIR_INPUT, \ .tne = 1, \