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Commit baa1b920 authored by Kamlakant Patel's avatar Kamlakant Patel Committed by Linus Walleij
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gpio: Add ACPI support for XLP GPIO controller 



Add ACPI support for GPIO controller on Broadcom Vulcan ARM64.
ACPI ID for this device is BRCM9006.

Signed-off-by: default avatarKamlakant Patel <kamlakant.patel@broadcom.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 1630a062

drivers/gpio/gpio-xlp.c

+29 −7
Original line number Diff line number Diff line
@@ -19,6 +19,7 @@ 
#include <linux/irq.h>

#include <linux/interrupt.h>

#include <linux/irqchip/chained_irq.h>

#include <linux/acpi.h>



/*

 * XLP GPIO has multiple 32 bit registers for each feature where each register
@@ -299,7 +300,6 @@ static int xlp_gpio_probe(struct platform_device *pdev) 
	struct gpio_chip *gc;

	struct resource *iores;

	struct xlp_gpio_priv *priv;

	const struct of_device_id *of_id;

	void __iomem *gpio_base;

	int irq_base, irq, err;

	int ngpio;
@@ -321,13 +321,26 @@ static int xlp_gpio_probe(struct platform_device *pdev) 
	if (irq < 0)

		return irq;



	if (pdev->dev.of_node) {

		const struct of_device_id *of_id;



		of_id = of_match_device(xlp_gpio_of_ids, &pdev->dev);

		if (!of_id) {

		dev_err(&pdev->dev, "Failed to get soc type!\n");

			dev_err(&pdev->dev, "Unable to match OF ID\n");

			return -ENODEV;

		}



		soc_type = (uintptr_t) of_id->data;

	} else {

		const struct acpi_device_id *acpi_id;



		acpi_id = acpi_match_device(pdev->dev.driver->acpi_match_table,

						&pdev->dev);

		if (!acpi_id || !acpi_id->driver_data) {

			dev_err(&pdev->dev, "Unable to match ACPI ID\n");

			return -ENODEV;

		}

		soc_type = (uintptr_t) acpi_id->driver_data;

	}



	switch (soc_type) {

	case XLP_GPIO_VARIANT_XLP832:
@@ -425,10 +438,19 @@ static int xlp_gpio_probe(struct platform_device *pdev) 
	return err;

}



#ifdef CONFIG_ACPI

static const struct acpi_device_id xlp_gpio_acpi_match[] = {

	{ "BRCM9006", GPIO_VARIANT_VULCAN },

	{},

};

MODULE_DEVICE_TABLE(acpi, xlp_gpio_acpi_match);

#endif



static struct platform_driver xlp_gpio_driver = {

	.driver		= {

		.name	= "xlp-gpio",

		.of_match_table = xlp_gpio_of_ids,

		.acpi_match_table = ACPI_PTR(xlp_gpio_acpi_match),

	},

	.probe		= xlp_gpio_probe,

};