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gpiolib: acpi: Introduce ACPI_GPIO_QUIRK_ONLY_GPIOIO 

New quirk enforces search for GPIO based on its type,
i.e. iterate over GpioIo resources only.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Andy Shevchenko 2019-02-06 22:49:46 +02:00 committed by Mark Brown
parent 3ebc584ce7
commit 4d1f7a6eab
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
3 changed files with 27 additions and 69 deletions
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15
drivers/gpio/gpiolib-acpi.c
View File

@ -530,17 +530,24 @@ static int acpi_populate_gpio_lookup(struct acpi_resource *ares, void *data)
if (ares->type != ACPI_RESOURCE_TYPE_GPIO)
return 1;
if (lookup->n++ == lookup->index && !lookup->desc) {
if (!lookup->desc) {
const struct acpi_resource_gpio *agpio = &ares->data.gpio;
int pin_index = lookup->pin_index;
bool gpioint = agpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT;
int pin_index;
if (lookup->info.quirks & ACPI_GPIO_QUIRK_ONLY_GPIOIO && gpioint)
lookup->index++;
if (lookup->n++ != lookup->index)
return 1;
pin_index = lookup->pin_index;
if (pin_index >= agpio->pin_table_length)
return 1;
lookup->desc = acpi_get_gpiod(agpio->resource_source.string_ptr,
agpio->pin_table[pin_index]);
lookup->info.gpioint =
agpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT;
lookup->info.gpioint = gpioint;
/*
* Polarity and triggering are only specified for GpioInt

7
include/linux/acpi.h
View File

@ -1014,6 +1014,13 @@ struct acpi_gpio_mapping {
/* Ignore IoRestriction field */
#define ACPI_GPIO_QUIRK_NO_IO_RESTRICTION BIT(0)
/*
* When ACPI GPIO mapping table is in use the index parameter inside it
* refers to the GPIO resource in _CRS method. That index has no
* distinction of actual type of the resource. When consumer wants to
* get GpioIo type explicitly, this quirk may be used.
*/
#define ACPI_GPIO_QUIRK_ONLY_GPIOIO BIT(1)
unsigned int quirks;
};

74
sound/soc/intel/boards/bytcr_rt5651.c
View File

@ -844,74 +844,18 @@ static const struct x86_cpu_id cherrytrail_cpu_ids[] = {
{}
};
static const struct acpi_gpio_params first_gpio = { 0, 0, false };
static const struct acpi_gpio_params second_gpio = { 1, 0, false };
static const struct acpi_gpio_params ext_amp_enable_gpios = { 0, 0, false };
static const struct acpi_gpio_mapping byt_rt5651_amp_en_first[] = {
{ "ext-amp-enable-gpios", &first_gpio, 1 },
static const struct acpi_gpio_mapping cht_rt5651_gpios[] = {
/*
* Some boards have I2cSerialBusV2, GpioIo, GpioInt as ACPI resources,
* other boards may have I2cSerialBusV2, GpioInt, GpioIo instead.
* We want the GpioIo one for the ext-amp-enable-gpio.
*/
{ "ext-amp-enable-gpios", &ext_amp_enable_gpios, 1, ACPI_GPIO_QUIRK_ONLY_GPIOIO },
{ },
};
static const struct acpi_gpio_mapping byt_rt5651_amp_en_second[] = {
{ "ext-amp-enable-gpios", &second_gpio, 1 },
{ },
};
/*
* Some boards have I2cSerialBusV2, GpioIo, GpioInt as ACPI resources, other
* boards may have I2cSerialBusV2, GpioInt, GpioIo instead. We want the
* GpioIo one for the ext-amp-enable-gpio and both count for the index in
* acpi_gpio_params index. So we have 2 different mappings and the code
* below figures out which one to use.
*/
struct byt_rt5651_acpi_resource_data {
int gpio_count;
int gpio_int_idx;
};
static int snd_byt_rt5651_acpi_resource(struct acpi_resource *ares, void *arg)
{
struct byt_rt5651_acpi_resource_data *data = arg;
if (ares->type != ACPI_RESOURCE_TYPE_GPIO)
return 0;
if (ares->data.gpio.connection_type == ACPI_RESOURCE_GPIO_TYPE_INT)
data->gpio_int_idx = data->gpio_count;
data->gpio_count++;
return 0;
}
static void snd_byt_rt5651_mc_pick_amp_en_gpio_mapping(struct device *codec)
{
struct byt_rt5651_acpi_resource_data data = { 0, -1 };
LIST_HEAD(resources);
int ret;
ret = acpi_dev_get_resources(ACPI_COMPANION(codec), &resources,
snd_byt_rt5651_acpi_resource, &data);
if (ret < 0) {
dev_warn(codec, "Failed to get ACPI resources, not adding external amplifier GPIO mapping\n");
return;
}
/* All info we need is gathered during the walk */
acpi_dev_free_resource_list(&resources);
switch (data.gpio_int_idx) {
case 0:
byt_rt5651_gpios = byt_rt5651_amp_en_second;
break;
case 1:
byt_rt5651_gpios = byt_rt5651_amp_en_first;
break;
default:
dev_warn(codec, "Unknown GpioInt index %d, not adding external amplifier GPIO mapping\n",
data.gpio_int_idx);
}
}
struct acpi_chan_package { /* ACPICA seems to require 64 bit integers */
u64 aif_value; /* 1: AIF1, 2: AIF2 */
u64 mclock_value; /* usually 25MHz (0x17d7940), ignored */
@ -1038,7 +982,7 @@ static int snd_byt_rt5651_mc_probe(struct platform_device *pdev)
/* Cherry Trail devices use an external amplifier enable gpio */
if (x86_match_cpu(cherrytrail_cpu_ids) && !byt_rt5651_gpios)
snd_byt_rt5651_mc_pick_amp_en_gpio_mapping(codec_dev);
byt_rt5651_gpios = cht_rt5651_gpios;
if (byt_rt5651_gpios) {
devm_acpi_dev_add_driver_gpios(codec_dev, byt_rt5651_gpios);