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Subject[PATCH v2] gpio: mpc8xxx: Add ACPI support
Date
Current implementation only supports DT, now add ACPI support.

Note that compared to device of 'fsl,qoriq-gpio', LS1028A and
LS1088A's GPIO have no extra programming, so simplify related checking.

Signed-off-by: Ran Wang <ran.wang_1@nxp.com>
---
Change in v2:
- Initialize devtype with NULL to fix compile warning.
- Replace of_device_get_match_data() and acpi_match_device with device_get_match_data().
- Replace acpi_match_device() with simpler checking logic per Andy's suggestion.

drivers/gpio/gpio-mpc8xxx.c | 34 +++++++++++++++++++++++-----------
1 file changed, 23 insertions(+), 11 deletions(-)

diff --git a/drivers/gpio/gpio-mpc8xxx.c b/drivers/gpio/gpio-mpc8xxx.c
index 6dfca83bcd90..646225fa3e73 100644
--- a/drivers/gpio/gpio-mpc8xxx.c
+++ b/drivers/gpio/gpio-mpc8xxx.c
@@ -9,6 +9,7 @@
* kind, whether express or implied.
*/

+#include <linux/acpi.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/spinlock.h>
@@ -292,8 +293,6 @@ static const struct of_device_id mpc8xxx_gpio_ids[] = {
{ .compatible = "fsl,mpc5121-gpio", .data = &mpc512x_gpio_devtype, },
{ .compatible = "fsl,mpc5125-gpio", .data = &mpc5125_gpio_devtype, },
{ .compatible = "fsl,pq3-gpio", },
- { .compatible = "fsl,ls1028a-gpio", },
- { .compatible = "fsl,ls1088a-gpio", },
{ .compatible = "fsl,qoriq-gpio", },
{}
};
@@ -303,8 +302,8 @@ static int mpc8xxx_probe(struct platform_device *pdev)
struct device_node *np = pdev->dev.of_node;
struct mpc8xxx_gpio_chip *mpc8xxx_gc;
struct gpio_chip *gc;
- const struct mpc8xxx_gpio_devtype *devtype =
- of_device_get_match_data(&pdev->dev);
+ const struct mpc8xxx_gpio_devtype *devtype = NULL;
+ struct fwnode_handle *fwnode;
int ret;

mpc8xxx_gc = devm_kzalloc(&pdev->dev, sizeof(*mpc8xxx_gc), GFP_KERNEL);
@@ -315,14 +314,14 @@ static int mpc8xxx_probe(struct platform_device *pdev)

raw_spin_lock_init(&mpc8xxx_gc->lock);

- mpc8xxx_gc->regs = of_iomap(np, 0);
+ mpc8xxx_gc->regs = devm_platform_ioremap_resource(pdev, 0);
if (!mpc8xxx_gc->regs)
return -ENOMEM;

gc = &mpc8xxx_gc->gc;
gc->parent = &pdev->dev;

- if (of_property_read_bool(np, "little-endian")) {
+ if (device_property_read_bool(&pdev->dev, "little-endian")) {
ret = bgpio_init(gc, &pdev->dev, 4,
mpc8xxx_gc->regs + GPIO_DAT,
NULL, NULL,
@@ -345,6 +344,7 @@ static int mpc8xxx_probe(struct platform_device *pdev)

mpc8xxx_gc->direction_output = gc->direction_output;

+ devtype = device_get_match_data(&pdev->dev);
if (!devtype)
devtype = &mpc8xxx_gpio_devtype_default;

@@ -369,9 +369,9 @@ static int mpc8xxx_probe(struct platform_device *pdev)
* associated input enable must be set (GPIOxGPIE[IEn]=1) to propagate
* the port value to the GPIO Data Register.
*/
+ fwnode = dev_fwnode(&pdev->dev);
if (of_device_is_compatible(np, "fsl,qoriq-gpio") ||
- of_device_is_compatible(np, "fsl,ls1028a-gpio") ||
- of_device_is_compatible(np, "fsl,ls1088a-gpio"))
+ !(IS_ERR_OR_NULL(fwnode) || is_of_node(fwnode)))
gc->write_reg(mpc8xxx_gc->regs + GPIO_IBE, 0xffffffff);

ret = gpiochip_add_data(gc, mpc8xxx_gc);
@@ -381,12 +381,15 @@ static int mpc8xxx_probe(struct platform_device *pdev)
goto err;
}

- mpc8xxx_gc->irqn = irq_of_parse_and_map(np, 0);
+ mpc8xxx_gc->irqn = platform_get_irq(pdev, 0);
if (!mpc8xxx_gc->irqn)
return 0;

- mpc8xxx_gc->irq = irq_domain_add_linear(np, MPC8XXX_GPIO_PINS,
- &mpc8xxx_gpio_irq_ops, mpc8xxx_gc);
+ mpc8xxx_gc->irq = irq_domain_create_linear(fwnode,
+ MPC8XXX_GPIO_PINS,
+ &mpc8xxx_gpio_irq_ops,
+ mpc8xxx_gc);
+
if (!mpc8xxx_gc->irq)
return 0;

@@ -425,12 +428,21 @@ static int mpc8xxx_remove(struct platform_device *pdev)
return 0;
}

+#ifdef CONFIG_ACPI
+static const struct acpi_device_id gpio_acpi_ids[] = {
+ {"NXP0031",},
+ { }
+};
+MODULE_DEVICE_TABLE(acpi, gpio_acpi_ids);
+#endif
+
static struct platform_driver mpc8xxx_plat_driver = {
.probe = mpc8xxx_probe,
.remove = mpc8xxx_remove,
.driver = {
.name = "gpio-mpc8xxx",
.of_match_table = mpc8xxx_gpio_ids,
+ .acpi_match_table = ACPI_PTR(gpio_acpi_ids),
},
};

--
2.25.1
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