sravan/system76-coreboot
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

src/drivers: Add reset/enable/stop_off_ms variables to ACPI devices

Browse Source 
Some touchscreens need to adhere to certain timings during the power
off sequence as well as during the power on sequence.  Adding
reset_off_delay_ms, enable_off_delay_ms, and stop_off_delay_ms to
accommodate these devices.

BUG=b:78311818
BRANCH=None
TEST=./util/abuild/abuild -p none -t google/poppy -x -a

Change-Id: Idb4a5dbe56eee4749d2f2b514e92c28fb2c6078f
Signed-off-by: Shelley Chen <shchen@google.com>
Reviewed-on: https://review.coreboot.org/25882
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
This commit is contained in:
Shelley Chen
2018-04-26 13:52:30 -07:00
parent 77034fa7d4
commit a060339774
6 changed files with 110 additions and 43 deletions
Download Patch File Download Diff File Expand all files Collapse all files

52
src/arch/x86/acpi_device.c
View File

@@ -469,15 +469,12 @@ void acpi_device_write_spi(const struct acpi_spi *spi)
}
/* PowerResource() with Enable and/or Reset control */
void acpi_device_add_power_res(
struct acpi_gpio *reset, unsigned int reset_delay_ms,
struct acpi_gpio *enable, unsigned int enable_delay_ms,
struct acpi_gpio *stop, unsigned int stop_delay_ms)
void acpi_device_add_power_res(const struct acpi_power_res_params *params)
{
static const char *power_res_dev_states[] = { "_PR0", "_PR3" };
unsigned int reset_gpio = reset->pins[0];
unsigned int enable_gpio = enable->pins[0];
unsigned int stop_gpio = stop->pins[0];
unsigned int reset_gpio = params->reset_gpio->pins[0];
unsigned int enable_gpio = params->enable_gpio->pins[0];
unsigned int stop_gpio = params->stop_gpio->pins[0];
if (!reset_gpio && !enable_gpio && !stop_gpio)
return;
@@ -492,32 +489,41 @@ void acpi_device_add_power_res(
/* Method (_ON, 0, Serialized) */
acpigen_write_method_serialized("_ON", 0);
if (reset_gpio)
acpigen_enable_tx_gpio(reset);
acpigen_enable_tx_gpio(params->reset_gpio);
if (enable_gpio) {
acpigen_enable_tx_gpio(enable);
if (enable_delay_ms)
acpigen_write_sleep(enable_delay_ms);
acpigen_enable_tx_gpio(params->enable_gpio);
if (params->enable_delay_ms)
acpigen_write_sleep(params->enable_delay_ms);
}
if (reset_gpio) {
acpigen_disable_tx_gpio(reset);
if (reset_delay_ms)
acpigen_write_sleep(reset_delay_ms);
acpigen_disable_tx_gpio(params->reset_gpio);
if (params->reset_delay_ms)
acpigen_write_sleep(params->reset_delay_ms);
}
if (stop_gpio) {
acpigen_disable_tx_gpio(stop);
if (stop_delay_ms)
acpigen_write_sleep(stop_delay_ms);
acpigen_disable_tx_gpio(params->stop_gpio);
if (params->stop_delay_ms)
acpigen_write_sleep(params->stop_delay_ms);
}
acpigen_pop_len(); /* _ON method */
/* Method (_OFF, 0, Serialized) */
acpigen_write_method_serialized("_OFF", 0);
if (stop_gpio)
acpigen_enable_tx_gpio(stop);
if (reset_gpio)
acpigen_enable_tx_gpio(reset);
if (enable_gpio)
acpigen_disable_tx_gpio(enable);
if (stop_gpio) {
acpigen_enable_tx_gpio(params->stop_gpio);
if (params->stop_off_delay_ms)
acpigen_write_sleep(params->stop_off_delay_ms);
}
if (reset_gpio) {
acpigen_enable_tx_gpio(params->reset_gpio);
if (params->reset_off_delay_ms)
acpigen_write_sleep(params->reset_off_delay_ms);
}
if (enable_gpio) {
acpigen_disable_tx_gpio(params->enable_gpio);
if (params->enable_off_delay_ms)
acpigen_write_sleep(params->enable_off_delay_ms);
}
acpigen_pop_len(); /* _OFF method */
acpigen_pop_len(); /* PowerResource PRIC */

39
src/arch/x86/include/arch/acpi_device.h
View File

@@ -315,6 +315,40 @@ struct acpi_spi {
/* Write SPI Bus descriptor to SSDT AML output */
void acpi_device_write_spi(const struct acpi_spi *spi);
/* GPIO/timing information for the power on/off sequences */
struct acpi_power_res_params {
/* GPIO used to take device out of reset or to put it into reset. */
struct acpi_gpio *reset_gpio;
/* Delay to be inserted after device is taken out of reset.
* (_ON method delay)
*/
unsigned int reset_delay_ms;
/* Delay to be inserted after device is put into reset.
* (_OFF method delay)
*/
unsigned int reset_off_delay_ms;
/* GPIO used to enable device. */
struct acpi_gpio *enable_gpio;
/* Delay to be inserted after device is enabled.
* (_ON method delay)
*/
unsigned int enable_delay_ms;
/* Delay to be inserted after device is disabled.
* (_OFF method delay)
*/
unsigned int enable_off_delay_ms;
/* GPIO used to stop operation of device. */
struct acpi_gpio *stop_gpio;
/* Delay to be inserted after disabling stop.
* (_ON method delay)
*/
unsigned int stop_delay_ms;
/* Delay to be inserted after enabling stop.
* (_OFF method delay)
*/
unsigned int stop_off_delay_ms;
};
/*
* Add a basic PowerResource block for a device that includes
* GPIOs to control enable, reset and stop operation of the device. Each
@@ -324,10 +358,7 @@ void acpi_device_write_spi(const struct acpi_spi *spi);
* Enable - Enable / disable power to device.
* Stop - Stop / start operation of device.
*/
void acpi_device_add_power_res(
struct acpi_gpio *reset, unsigned int reset_delay_ms,
struct acpi_gpio *enable, unsigned int enable_delay_ms,
struct acpi_gpio *stop, unsigned int stop_delay_ms);
void acpi_device_add_power_res(const struct acpi_power_res_params *params);
/*
* Writing Device Properties objects via _DSD