diff options
| author | Furquan Shaikh <furquan@google.com> | 2020-06-30 10:35:27 -0700 |
|---|---|---|
| committer | Furquan Shaikh <furquan@google.com> | 2020-06-30 22:51:11 +0000 |
| commit | 05726e8e699e4874ef4290cd07e0cdb2590d4fe1 (patch) | |
| tree | b89fee8c7d23c42f7a4f18936dbac26f1dee7433 /src/soc/amd/common/block | |
| parent | aaff4017d011041c99777a452f395fbd35546c35 (diff) | |
soc/amd/common/gpio: Use gpio_setbits32()
Some codepaths want to set selected bits of a hardware register
to match those of a given variable in memory. Provide a helper
function for this purpose and use it in gpio_set(),
gpio_input_pulldown() and gpio_input_pullup().
This change also adds GPIO_PULL_MASK and updates GPIO_OUTPUT_MASK to
include all bits dealing with pull and output respectively.
Change-Id: I4413d113dff550900348a44f71b949b7547a9cfc
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42688
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/soc/amd/common/block')
| -rw-r--r-- | src/soc/amd/common/block/gpio_banks/gpio.c | 12 | ||||
| -rw-r--r-- | src/soc/amd/common/block/include/amdblocks/gpio_banks.h | 4 |
2 files changed, 12 insertions, 4 deletions
diff --git a/src/soc/amd/common/block/gpio_banks/gpio.c b/src/soc/amd/common/block/gpio_banks/gpio.c index d7ac89667b..caf07c0192 100644 --- a/src/soc/amd/common/block/gpio_banks/gpio.c +++ b/src/soc/amd/common/block/gpio_banks/gpio.c @@ -111,6 +111,12 @@ static void __gpio_update32(gpio_t gpio_num, uint32_t mask, uint32_t or) gpio_write32(gpio_num, reg); } +/* Set specified bits of a register to match those of ctrl. */ +static void __gpio_setbits32(gpio_t gpio_num, uint32_t mask, uint32_t ctrl) +{ + __gpio_update32(gpio_num, ~mask, ctrl & mask); +} + static void __gpio_and32(gpio_t gpio_num, uint32_t mask) { __gpio_update32(gpio_num, mask, 0); @@ -143,17 +149,17 @@ int gpio_get(gpio_t gpio_num) void gpio_set(gpio_t gpio_num, int value) { - __gpio_update32(gpio_num, ~GPIO_OUTPUT_MASK, !!value << GPIO_OUTPUT_SHIFT); + __gpio_setbits32(gpio_num, GPIO_OUTPUT_VALUE, value ? GPIO_OUTPUT_VALUE : 0); } void gpio_input_pulldown(gpio_t gpio_num) { - __gpio_update32(gpio_num, ~GPIO_PULLUP_ENABLE, GPIO_PULLDOWN_ENABLE); + __gpio_setbits32(gpio_num, GPIO_PULL_MASK, GPIO_PULLDOWN_ENABLE); } void gpio_input_pullup(gpio_t gpio_num) { - __gpio_update32(gpio_num, ~GPIO_PULLDOWN_ENABLE, GPIO_PULLUP_ENABLE); + __gpio_setbits32(gpio_num, GPIO_PULL_MASK, GPIO_PULLUP_ENABLE); } void gpio_input(gpio_t gpio_num) diff --git a/src/soc/amd/common/block/include/amdblocks/gpio_banks.h b/src/soc/amd/common/block/include/amdblocks/gpio_banks.h index 70f1db3bf0..546d55aa53 100644 --- a/src/soc/amd/common/block/include/amdblocks/gpio_banks.h +++ b/src/soc/amd/common/block/include/amdblocks/gpio_banks.h @@ -65,10 +65,12 @@ struct soc_amd_event { #define GPIO_8KPULLUP_SELECT (1 << 19) #define GPIO_PULLUP_ENABLE (1 << 20) #define GPIO_PULLDOWN_ENABLE (1 << 21) +#define GPIO_PULL_MASK (7 << 19) + #define GPIO_OUTPUT_SHIFT 22 -#define GPIO_OUTPUT_MASK (1 << GPIO_OUTPUT_SHIFT) #define GPIO_OUTPUT_VALUE (1 << GPIO_OUTPUT_SHIFT) #define GPIO_OUTPUT_ENABLE (1 << 23) +#define GPIO_OUTPUT_MASK (3 << GPIO_OUTPUT_SHIFT) #define GPIO_INT_STATUS (1 << 28) #define GPIO_WAKE_STATUS (1 << 29) |