diff options
Diffstat (limited to 'src/soc/intel/apollolake/gpio.c')
| -rw-r--r-- | src/soc/intel/apollolake/gpio.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/soc/intel/apollolake/gpio.c b/src/soc/intel/apollolake/gpio.c index 2d325255e7..8ac00cde36 100644 --- a/src/soc/intel/apollolake/gpio.c +++ b/src/soc/intel/apollolake/gpio.c @@ -83,6 +83,27 @@ static void gpio_configure_itss(const struct pad_config *cfg, itss_set_irq_polarity(irq, !!(cfg->config0 & PAD_CFG0_RX_POL_INVERT)); } +static void gpio_configure_owner(const struct pad_config *cfg, + uint16_t port, int pin) +{ + uint32_t val; + uint16_t hostsw_reg; + + /* The 4th bit in pad_config 1 (RO) is used to indicate if the pad + * needs GPIO driver ownership. + */ + if (!(cfg->config1 & PAD_CFG1_GPIO_DRIVER)) + return; + + /* Based on the gpio pin number configure the corresponding bit in + * HOSTSW_OWN register. Value of 0x1 indicates GPIO Driver onwership. + */ + hostsw_reg = HOSTSW_OWN_REG_BASE + ((pin / 32) * sizeof(uint32_t)); + val = iosf_read(port, hostsw_reg); + val |= 1 << (pin % 32); + iosf_write(port, hostsw_reg, val); +} + void gpio_configure_pad(const struct pad_config *cfg) { uint32_t dw1; @@ -100,6 +121,8 @@ void gpio_configure_pad(const struct pad_config *cfg) iosf_write(comm->port, config_offset + sizeof(uint32_t), dw1); gpio_configure_itss(cfg, comm->port, config_offset); + gpio_configure_owner(cfg, comm->port, cfg->pad - comm->first_pad); + } void gpio_configure_pads(const struct pad_config *cfg, size_t num_pads) |