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pinctrl: cy8c95x0: Override IRQ for one of the expanders on Galileo Gen 1

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ACPI table on Intel Galileo Gen 1 has wrong pin number for IRQ resource
of the I²C GPIO expander. Since we know what that number is and luckily
have GPIO bases fixed for SoC's controllers, we may use a simple DMI quirk
to match the platform and retrieve GpioInt() pin on it for the expander in
question.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Link: https://lore.kernel.org/r/20220902182650.83098-15-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Andy Shevchenko 2022-09-02 21:26:48 +03:00 committed by Linus Walleij
parent 618a43ff1f
commit 785b1bd854
1 changed files with 48 additions and 0 deletions
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48
drivers/pinctrl/pinctrl-cy8c95x0.c
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@ -7,7 +7,9 @@
* Author: Naresh Solanki <Naresh.Solanki@9elements.com>
*/
#include <linux/acpi.h>
#include <linux/bitmap.h>
#include <linux/dmi.h>
#include <linux/gpio/driver.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
@ -73,6 +75,46 @@ static const struct of_device_id cy8c95x0_dt_ids[] = {
MODULE_DEVICE_TABLE(of, cy8c95x0_dt_ids);
static const struct acpi_gpio_params cy8c95x0_irq_gpios = { 0, 0, true };
static const struct acpi_gpio_mapping cy8c95x0_acpi_irq_gpios[] = {
{ "irq-gpios", &cy8c95x0_irq_gpios, 1, ACPI_GPIO_QUIRK_ABSOLUTE_NUMBER },
{ }
};
static int cy8c95x0_acpi_get_irq(struct device *dev)
{
int ret;
ret = devm_acpi_dev_add_driver_gpios(dev, cy8c95x0_acpi_irq_gpios);
if (ret)
dev_warn(dev, "can't add GPIO ACPI mapping\n");
ret = acpi_dev_gpio_irq_get_by(ACPI_COMPANION(dev), "irq-gpios", 0);
if (ret < 0)
return ret;
dev_info(dev, "ACPI interrupt quirk (IRQ %d)\n", ret);
return ret;
}
static const struct dmi_system_id cy8c95x0_dmi_acpi_irq_info[] = {
{
/*
* On Intel Galileo Gen 1 board the IRQ pin is provided
* as an absolute number instead of being relative.
* Since first controller (gpio-sch.c) and second
* (gpio-dwapb.c) are at the fixed bases, we may safely
* refer to the number in the global space to get an IRQ
* out of it.
*/
.matches = {
DMI_EXACT_MATCH(DMI_BOARD_NAME, "Galileo"),
},
},
{}
};
#define MAX_BANK 8
#define BANK_SZ 8
#define MAX_LINE (MAX_BANK * BANK_SZ)
@ -1309,6 +1351,12 @@ static int cy8c95x0_probe(struct i2c_client *client)
bitmap_set(chip->shiftmask, 0, 20);
mutex_init(&chip->i2c_lock);
if (dmi_first_match(cy8c95x0_dmi_acpi_irq_info)) {
ret = cy8c95x0_acpi_get_irq(&client->dev);
if (ret > 0)
client->irq = ret;
}
if (client->irq) {
ret = cy8c95x0_irq_setup(chip, client->irq);
if (ret)