diff options
Diffstat (limited to 'src/soc/amd/stoneyridge/gpio.c')
| -rw-r--r-- | src/soc/amd/stoneyridge/gpio.c | 35 |
1 files changed, 34 insertions, 1 deletions
diff --git a/src/soc/amd/stoneyridge/gpio.c b/src/soc/amd/stoneyridge/gpio.c index 955cc6a0cc..bca8f5d925 100644 --- a/src/soc/amd/stoneyridge/gpio.c +++ b/src/soc/amd/stoneyridge/gpio.c @@ -219,12 +219,41 @@ uint16_t gpio_acpi_pin(gpio_t gpio) return gpio; } +/* + * Returns the debounce type corresponding to a given interrupt type. + * + * This matches what the linux kernel will set during gpio configuration: + * + * Interrupt Debounce + * Edge Remove Glitch + * Level High Preserve Low Glitch + * Level Low Preserve High Glitch + */ +static uint32_t gpio_irq_debounce(uint32_t flag) +{ + uint32_t trigger; + + trigger = flag & FLAGS_TRIGGER_MASK; + switch (trigger) { + case GPIO_TRIGGER_LEVEL_LOW: + return GPIO_IN_PRESERVE_HIGH_GLITCH; + case GPIO_TRIGGER_LEVEL_HIGH: + return GPIO_IN_PRESERVE_LOW_GLITCH; + case GPIO_TRIGGER_EDGE_LOW: + return GPIO_IN_REMOVE_GLITCH; + case GPIO_TRIGGER_EDGE_HIGH: + return GPIO_IN_REMOVE_GLITCH; + default: + return GPIO_IN_NO_DEBOUNCE; + } +} + 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 control, control_flags, edge_level, direction; - uint32_t mask, bit_edge, bit_level; + uint32_t mask, bit_edge, bit_level, debounce; uint8_t mux, index, gpio; int gevent_num; @@ -273,6 +302,10 @@ void sb_program_gpios(const struct soc_amd_gpio *gpio_list_ptr, size_t size) case GPIO_SCI_FLAG: mem_read_write32(gpio_ptr, control, INT_SCI_SMI_MASK); + /* Always set debounce type for SCI gpio */ + debounce = gpio_irq_debounce(control_flags); + mem_read_write32(gpio_ptr, debounce, + GPIO_DEBOUNCE_MASK); get_sci_config_bits(control_flags, &bit_edge, &bit_level); edge_level |= bit_edge << gevent_num; |