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authorShelley Chen <shchen@google.com>2018-04-26 13:52:30 -0700
committerShelley Chen <shchen@google.com>2018-05-02 20:44:24 +0000
commita0603397740165cfa13a250851f0213e9035cd5e (patch)
tree28c962d0a1c818680a77889b807786827d3346d7 /src/arch/x86
parent77034fa7d4402aab9eef84fc652b0493a2024026 (diff)
src/drivers: Add reset/enable/stop_off_ms variables to ACPI devices
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>
Diffstat (limited to 'src/arch/x86')
-rw-r--r--src/arch/x86/acpi_device.c52
-rw-r--r--src/arch/x86/include/arch/acpi_device.h39
2 files changed, 64 insertions, 27 deletions
diff --git a/src/arch/x86/acpi_device.c b/src/arch/x86/acpi_device.c
index 31e59eaf66..c8d313e037 100644
--- a/src/arch/x86/acpi_device.c
+++ b/src/arch/x86/acpi_device.c
@@ -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 */
diff --git a/src/arch/x86/include/arch/acpi_device.h b/src/arch/x86/include/arch/acpi_device.h
index 4361c740c9..33f3f8687d 100644
--- a/src/arch/x86/include/arch/acpi_device.h
+++ b/src/arch/x86/include/arch/acpi_device.h
@@ -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