diff options
| author | Simon Glass <sjg@chromium.org> | 2020-07-07 21:32:26 -0600 |
|---|---|---|
| committer | Bin Meng <bmeng.cn@gmail.com> | 2020-07-17 14:32:24 +0800 |
| commit | 43ee86cc4bb96686996f31071ce7da8c0c99fec5 (patch) | |
| tree | 4ddd77aa2e2765aeff4df00529e7a4d816fda1e7 /drivers/gpio | |
| parent | eb2ebbcf56ec127f0e1b05b7bb22b63ee4af9dff (diff) | |
x86: gpio: Add support for obtaining ACPI info for a GPIO
Implement the method that converts a GPIO into the form used by ACPI, so
that GPIOs can be added to ACPI tables.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/intel_gpio.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/gpio/intel_gpio.c b/drivers/gpio/intel_gpio.c index b4d5be97da..6a3a8c4cfa 100644 --- a/drivers/gpio/intel_gpio.c +++ b/drivers/gpio/intel_gpio.c @@ -12,6 +12,7 @@ #include <pch.h> #include <pci.h> #include <syscon.h> +#include <acpi/acpi_device.h> #include <asm/cpu.h> #include <asm/gpio.h> #include <asm/intel_pinctrl.h> @@ -19,6 +20,7 @@ #include <asm/io.h> #include <asm/pci.h> #include <asm/arch/gpio.h> +#include <dm/acpi.h> #include <dt-bindings/gpio/x86-gpio.h> static int intel_gpio_direction_input(struct udevice *dev, uint offset) @@ -128,6 +130,35 @@ static int intel_gpio_xlate(struct udevice *orig_dev, struct gpio_desc *desc, return 0; } +#if CONFIG_IS_ENABLED(ACPIGEN) +static int intel_gpio_get_acpi(const struct gpio_desc *desc, + struct acpi_gpio *gpio) +{ + struct udevice *pinctrl; + int ret; + + if (!dm_gpio_is_valid(desc)) + return -ENOENT; + pinctrl = dev_get_parent(desc->dev); + + memset(gpio, '\0', sizeof(*gpio)); + + gpio->type = ACPI_GPIO_TYPE_IO; + gpio->pull = ACPI_GPIO_PULL_DEFAULT; + gpio->io_restrict = ACPI_GPIO_IO_RESTRICT_OUTPUT; + gpio->polarity = ACPI_GPIO_ACTIVE_HIGH; + gpio->pin_count = 1; + gpio->pins[0] = intel_pinctrl_get_acpi_pin(pinctrl, desc->offset); + gpio->pin0_addr = intel_pinctrl_get_config_reg_addr(pinctrl, + desc->offset); + ret = acpi_get_path(pinctrl, gpio->resource, sizeof(gpio->resource)); + if (ret) + return log_msg_ret("resource", ret); + + return 0; +} +#endif + static int intel_gpio_probe(struct udevice *dev) { return 0; @@ -152,6 +183,9 @@ static const struct dm_gpio_ops gpio_intel_ops = { .set_value = intel_gpio_set_value, .get_function = intel_gpio_get_function, .xlate = intel_gpio_xlate, +#if CONFIG_IS_ENABLED(ACPIGEN) + .get_acpi = intel_gpio_get_acpi, +#endif }; static const struct udevice_id intel_intel_gpio_ids[] = { |