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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: Kamlakant Patel <kamlakant.patel@broadcom.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
hifive-unleashed-5.1
Kamlakant Patel 2016-06-05 14:00:44 +05:30 committed by Linus Walleij
parent 1630a0624a
commit baa1b920a8
1 changed files with 29 additions and 7 deletions
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36
drivers/gpio/gpio-xlp.c
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@ -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;
of_id = of_match_device(xlp_gpio_of_ids, &pdev->dev);
if (!of_id) {
dev_err(&pdev->dev, "Failed to get soc type!\n");
return -ENODEV;
}
if (pdev->dev.of_node) {
const struct of_device_id *of_id;
soc_type = (uintptr_t) of_id->data;
of_id = of_match_device(xlp_gpio_of_ids, &pdev->dev);
if (!of_id) {
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 @@ out_free_desc:
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,
};