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acpi_device: Move power resource function to generic code 

Move the function that adds a power resource block from
i2c/generic to the acpi device code at src/arch/x86/acpi_device.c
so it can be used by more drivers.

BUG=chrome-os-partner:61233
TEST=verify SSDT table generation is unchanged

Change-Id: I0ffb61a4f46028cbe912e85c0124d9f5200b9c76
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://review.coreboot.org/18391
Tested-by: build bot (Jenkins)
Reviewed-by: Furquan Shaikh <furquan@google.com>
This commit is contained in:
Duncan Laurie 2017-02-17 17:05:03 -08:00 committed by Martin Roth
parent f9d5308690
commit bd73dbbc38
3 changed files with 59 additions and 45 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

46
src/arch/x86/acpi_device.c
View File

@ -490,6 +490,52 @@ void acpi_device_write_spi(const struct acpi_spi *spi)
acpi_device_fill_len(desc_length);
}
/* PowerResource() with Enable and/or Reset control */
void acpi_device_add_power_res(
struct acpi_gpio *reset, unsigned reset_delay_ms,
struct acpi_gpio *enable, unsigned enable_delay_ms)
{
const char *power_res_dev_states[] = { "_PR0", "_PR3" };
unsigned reset_gpio = reset->pins[0];
unsigned enable_gpio = enable->pins[0];
if (!reset_gpio && !enable_gpio)
return;
/* PowerResource (PRIC, 0, 0) */
acpigen_write_power_res("PRIC", 0, 0, power_res_dev_states,
ARRAY_SIZE(power_res_dev_states));
/* Method (_STA, 0, NotSerialized) { Return (0x1) } */
acpigen_write_STA(0x1);
/* Method (_ON, 0, Serialized) */
acpigen_write_method_serialized("_ON", 0);
if (reset_gpio)
acpigen_soc_set_tx_gpio(reset_gpio);
if (enable_gpio) {
acpigen_soc_set_tx_gpio(enable_gpio);
if (enable_delay_ms)
acpigen_write_sleep(enable_delay_ms);
}
if (reset_gpio) {
acpigen_soc_clear_tx_gpio(reset_gpio);
if (reset_delay_ms)
acpigen_write_sleep(reset_delay_ms);
}
acpigen_pop_len(); /* _ON method */
/* Method (_OFF, 0, Serialized) */
acpigen_write_method_serialized("_OFF", 0);
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 void acpi_dp_write_array(const struct acpi_dp *array);
static void acpi_dp_write_value(const struct acpi_dp *prop)
{

9
src/arch/x86/include/arch/acpi_device.h
View File

@ -239,6 +239,15 @@ struct acpi_spi {
/* Write SPI Bus descriptor to SSDT AML output */
void acpi_device_write_spi(const struct acpi_spi *spi);
/*
* Add a basic PowerResource block for a device that includes
* GPIOs for enable and/or reset control of the device. Each
* GPIO is optional, but at least one must be provided.
*/
void acpi_device_add_power_res(
struct acpi_gpio *reset, unsigned reset_delay_ms,
struct acpi_gpio *enable, unsigned enable_delay_ms);
/*
* Writing Device Properties objects via _DSD
*

49
src/drivers/i2c/generic/generic.c
View File

@ -26,50 +26,6 @@
#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES)
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->has_power_resource)
return;
if (!reset_gpio && !enable_gpio)
return;
/* PowerResource (PRIC, 0, 0) */
acpigen_write_power_res("PRIC", 0, 0, power_res_dev_states,
ARRAY_SIZE(power_res_dev_states));
/* Method (_STA, 0, NotSerialized) { Return (0x1) } */
acpigen_write_STA(0x1);
/* Method (_ON, 0, Serialized) */
acpigen_write_method_serialized("_ON", 0);
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 (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 (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)
{
/*
@ -170,7 +126,10 @@ void i2c_generic_fill_ssdt(struct device *dev,
}
/* Power Resource */
i2c_generic_add_power_res(config);
if (config->has_power_resource)
acpi_device_add_power_res(
&config->reset_gpio, config->reset_delay_ms,
&config->enable_gpio, config->enable_delay_ms);
/* Callback if any. */
if (callback)