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pinctrl: amd: Add amd_get_iomux_res function

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Presently there is no way to change pinmux configuration run time.
Hence add a function to get IOMUX resource which can be used to
configure IOMUX GPIO pins run time.

Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20220601152900.1012813-6-Basavaraj.Natikar@amd.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Basavaraj Natikar 2022-06-01 20:58:59 +05:30 committed by Linus Walleij
parent a1e9bb597a
commit 79bb5c7fe8
2 changed files with 26 additions and 0 deletions
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25
drivers/pinctrl/pinctrl-amd.c
View File

@ -963,6 +963,30 @@ static struct pinctrl_desc amd_pinctrl_desc = {
.owner = THIS_MODULE,
};
static void amd_get_iomux_res(struct amd_gpio *gpio_dev)
{
struct pinctrl_desc *desc = &amd_pinctrl_desc;
struct device *dev = &gpio_dev->pdev->dev;
int index;
index = device_property_match_string(dev, "pinctrl-resource-names", "iomux");
if (index < 0) {
dev_warn(dev, "failed to get iomux index\n");
goto out_no_pinmux;
}
gpio_dev->iomux_base = devm_platform_ioremap_resource(gpio_dev->pdev, index);
if (IS_ERR(gpio_dev->iomux_base)) {
dev_warn(dev, "Failed to get iomux %d io resource\n", index);
goto out_no_pinmux;
}
return;
out_no_pinmux:
desc->pmxops = NULL;
}
static int amd_gpio_probe(struct platform_device *pdev)
{
int ret = 0;
@ -1020,6 +1044,7 @@ static int amd_gpio_probe(struct platform_device *pdev)
gpio_dev->ngroups = ARRAY_SIZE(kerncz_groups);
amd_pinctrl_desc.name = dev_name(&pdev->dev);
amd_get_iomux_res(gpio_dev);
gpio_dev->pctrl = devm_pinctrl_register(&pdev->dev, &amd_pinctrl_desc,
gpio_dev);
if (IS_ERR(gpio_dev->pctrl)) {

1
drivers/pinctrl/pinctrl-amd.h
View File

@ -83,6 +83,7 @@ struct amd_function {
struct amd_gpio {
raw_spinlock_t lock;
void __iomem *base;
void __iomem *iomux_base;
const struct pingroup *groups;
u32 ngroups;