diff options
| author | Duncan Laurie <dlaurie@chromium.org> | 2017-02-17 17:05:03 -0800 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2017-02-19 21:34:12 +0100 |
| commit | bd73dbbc38649bd487a44b0bb49fdaa19a248634 (patch) | |
| tree | 8706041da979ef86fb71ccd85fa04270fab0677b /src/arch/x86 | |
| parent | f9d5308690e96002dbeab77b78e499dcd2d3a42f (diff) | |
| download | coreboot-bd73dbbc38649bd487a44b0bb49fdaa19a248634.tar.xz | |
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>
Diffstat (limited to 'src/arch/x86')
| -rw-r--r-- | src/arch/x86/acpi_device.c | 46 | ||||
| -rw-r--r-- | src/arch/x86/include/arch/acpi_device.h | 9 |
2 files changed, 55 insertions, 0 deletions
diff --git a/src/arch/x86/acpi_device.c b/src/arch/x86/acpi_device.c index 7cf292fbee..4fe16a138f 100644 --- a/src/arch/x86/acpi_device.c +++ b/src/arch/x86/acpi_device.c @@ -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) { diff --git a/src/arch/x86/include/arch/acpi_device.h b/src/arch/x86/include/arch/acpi_device.h index aba5c2d1a6..7d4cb8fd89 100644 --- a/src/arch/x86/include/arch/acpi_device.h +++ b/src/arch/x86/include/arch/acpi_device.h @@ -240,6 +240,15 @@ struct acpi_spi { 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 * * http://uefi.org/sites/default/files/resources/_DSD-device-properties-UUID.pdf |