From bd73dbbc38649bd487a44b0bb49fdaa19a248634 Mon Sep 17 00:00:00 2001 From: Duncan Laurie Date: Fri, 17 Feb 2017 17:05:03 -0800 Subject: 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 Reviewed-on: https://review.coreboot.org/18391 Tested-by: build bot (Jenkins) Reviewed-by: Furquan Shaikh --- src/arch/x86/acpi_device.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) (limited to 'src/arch/x86/acpi_device.c') 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) { -- cgit v1.2.3