diff options
Diffstat (limited to 'src/soc/amd/stoneyridge')
| -rw-r--r-- | src/soc/amd/stoneyridge/gpio.c | 27 | ||||
| -rw-r--r-- | src/soc/amd/stoneyridge/include/soc/gpio.h | 4 |
2 files changed, 30 insertions, 1 deletions
diff --git a/src/soc/amd/stoneyridge/gpio.c b/src/soc/amd/stoneyridge/gpio.c index 955cc6a0cc..621aca3631 100644 --- a/src/soc/amd/stoneyridge/gpio.c +++ b/src/soc/amd/stoneyridge/gpio.c @@ -222,15 +222,30 @@ uint16_t gpio_acpi_pin(gpio_t gpio) void sb_program_gpios(const struct soc_amd_gpio *gpio_list_ptr, size_t size) { uint8_t *mux_ptr; - uint32_t *gpio_ptr; + uint32_t *gpio_ptr, *inter_master; uint32_t control, control_flags, edge_level, direction; uint32_t mask, bit_edge, bit_level; uint8_t mux, index, gpio; int gevent_num; + inter_master = (uint32_t *)(uintptr_t)(GPIO_CONTROL_MMIO_BASE + + GPIO_MASTER_SWITCH); direction = 0; edge_level = 0; mask = 0; + + /* + * Disable blocking wake/interrupt status generation while updating + * debounce registers. Otherwise when a debounce register is updated + * the whole GPIO controller will zero out all interrupt enable status + * bits while the delay happens. This could cause us to drop the bits + * due to the read-modify-write that happens on each register. + * + * Additionally disable interrupt generation so we don't get any + * spurious interrupts while updating the registers. + */ + mem_read_write32(inter_master, 0, GPIO_MASK_STS_EN | GPIO_INTERRUPT_EN); + for (index = 0; index < size; index++) { gpio = gpio_list_ptr[index].gpio; mux = gpio_list_ptr[index].function; @@ -290,6 +305,16 @@ void sb_program_gpios(const struct soc_amd_gpio *gpio_list_ptr, size_t size) AMD_GPIO_CONTROL_MASK); } } + + /* + * Re-enable interrupt status generation. + * + * We leave MASK_STATUS disabled because the kernel may reconfigure the + * debounce registers while the drivers load. This will cause interrupts + * to be missed during boot. + */ + mem_read_write32(inter_master, GPIO_INTERRUPT_EN, GPIO_INTERRUPT_EN); + /* Set all SCI trigger direction (high/low) */ mem_read_write32((uint32_t *)(uintptr_t)(APU_SMI_BASE + SMI_SCI_TRIG), direction, mask); diff --git a/src/soc/amd/stoneyridge/include/soc/gpio.h b/src/soc/amd/stoneyridge/include/soc/gpio.h index 47eae84c86..fe8240fb11 100644 --- a/src/soc/amd/stoneyridge/include/soc/gpio.h +++ b/src/soc/amd/stoneyridge/include/soc/gpio.h @@ -41,6 +41,10 @@ struct soc_amd_i2c_save { uint8_t mux_value; }; +#define GPIO_MASTER_SWITCH 0xFC +#define GPIO_MASK_STS_EN BIT(28) +#define GPIO_INTERRUPT_EN BIT(30) + #define GPIO_I2C0_SCL BIT(0) #define GPIO_I2C1_SCL BIT(1) #define GPIO_I2C2_SCL BIT(2) |