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path: root/src/drivers/i2c/generic/generic.c
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Diffstat (limited to 'src/drivers/i2c/generic/generic.c')
-rw-r--r--src/drivers/i2c/generic/generic.c75
1 files changed, 61 insertions, 14 deletions
diff --git a/src/drivers/i2c/generic/generic.c b/src/drivers/i2c/generic/generic.c
index 50f60bb56a..4cf3e9e419 100644
--- a/src/drivers/i2c/generic/generic.c
+++ b/src/drivers/i2c/generic/generic.c
@@ -29,8 +29,13 @@
static void i2c_generic_add_power_res(struct drivers_i2c_generic_config *config)
{
const char *power_res_dev_states[] = { "_PR0", "_PR3" };
+ unsigned reset_gpio = config->reset_gpio.pins[0];
+ unsigned enable_gpio = config->enable_gpio.pins[0];
- if (!config->reset_gpio && !config->enable_gpio)
+ if (config->pwr_mgmt_type != POWER_RESOURCE)
+ return;
+
+ if (!reset_gpio && !enable_gpio)
return;
/* PowerResource (PRIC, 0, 0) */
@@ -42,29 +47,51 @@ static void i2c_generic_add_power_res(struct drivers_i2c_generic_config *config)
/* Method (_ON, 0, Serialized) */
acpigen_write_method_serialized("_ON", 0);
- if (config->reset_gpio)
- acpigen_soc_set_tx_gpio(config->reset_gpio);
- if (config->enable_gpio) {
- acpigen_soc_set_tx_gpio(config->enable_gpio);
+ if (reset_gpio)
+ acpigen_soc_set_tx_gpio(reset_gpio);
+ if (enable_gpio) {
+ acpigen_soc_set_tx_gpio(enable_gpio);
acpigen_write_sleep(config->enable_delay_ms);
}
- if (config->reset_gpio) {
- acpigen_soc_clear_tx_gpio(config->reset_gpio);
+ if (reset_gpio) {
+ acpigen_soc_clear_tx_gpio(reset_gpio);
acpigen_write_sleep(config->reset_delay_ms);
}
acpigen_pop_len(); /* _ON method */
/* Method (_OFF, 0, Serialized) */
acpigen_write_method_serialized("_OFF", 0);
- if (config->reset_gpio)
- acpigen_soc_set_tx_gpio(config->reset_gpio);
- if (config->enable_gpio)
- acpigen_soc_clear_tx_gpio(config->enable_gpio);
+ if (reset_gpio)
+ acpigen_soc_set_tx_gpio(reset_gpio);
+ if (enable_gpio)
+ acpigen_soc_clear_tx_gpio(enable_gpio);
acpigen_pop_len(); /* _OFF method */
acpigen_pop_len(); /* PowerResource PRIC */
}
+static bool i2c_generic_add_gpios_to_crs(struct drivers_i2c_generic_config *cfg)
+{
+ if (cfg->pwr_mgmt_type == GPIO_EXPORT)
+ return true;
+
+ return false;
+}
+
+static int i2c_generic_write_gpio(struct acpi_gpio *gpio, int *curr_index)
+{
+ int ret = -1;
+
+ if (gpio->pin_count == 0)
+ return ret;
+
+ acpi_device_write_gpio(gpio);
+ ret = *curr_index;
+ (*curr_index)++;
+
+ return ret;
+}
+
void i2c_generic_fill_ssdt(struct device *dev,
void (*callback)(struct device *dev),
struct drivers_i2c_generic_config *config)
@@ -77,6 +104,9 @@ void i2c_generic_fill_ssdt(struct device *dev,
.resource = scope,
};
struct acpi_dp *dsd = NULL;
+ int curr_index = 0;
+ int reset_gpio_index = -1, enable_gpio_index = -1;
+ const char *path = acpi_device_path(dev);
if (!dev->enabled || !scope)
return;
@@ -101,6 +131,12 @@ void i2c_generic_fill_ssdt(struct device *dev,
acpigen_write_resourcetemplate_header();
acpi_device_write_i2c(&i2c);
acpi_device_write_interrupt(&config->irq);
+ if (i2c_generic_add_gpios_to_crs(config) == true) {
+ reset_gpio_index = i2c_generic_write_gpio(&config->reset_gpio,
+ &curr_index);
+ enable_gpio_index = i2c_generic_write_gpio(&config->enable_gpio,
+ &curr_index);
+ }
acpigen_write_resourcetemplate_footer();
/* Wake capabilities */
@@ -109,9 +145,20 @@ void i2c_generic_fill_ssdt(struct device *dev,
acpigen_write_PRW(config->wake, 3);
}
- if (config->probed) {
+ /* DSD */
+ if (config->probed || (reset_gpio_index != -1) ||
+ (enable_gpio_index != -1)) {
dsd = acpi_dp_new_table("_DSD");
- acpi_dp_add_integer(dsd, "linux,probed", 1);
+ if (config->probed)
+ acpi_dp_add_integer(dsd, "linux,probed", 1);
+ if (reset_gpio_index != -1)
+ acpi_dp_add_gpio(dsd, "reset-gpios", path,
+ reset_gpio_index, 0,
+ config->reset_gpio.polarity);
+ if (enable_gpio_index != -1)
+ acpi_dp_add_gpio(dsd, "enable-gpios", path,
+ enable_gpio_index, 0,
+ config->enable_gpio.polarity);
acpi_dp_write(dsd);
}
@@ -125,7 +172,7 @@ void i2c_generic_fill_ssdt(struct device *dev,
acpigen_pop_len(); /* Device */
acpigen_pop_len(); /* Scope */
- printk(BIOS_INFO, "%s: %s at %s\n", acpi_device_path(dev),
+ printk(BIOS_INFO, "%s: %s at %s\n", path,
config->desc ? : dev->chip_ops->name, dev_path(dev));
}