diff options
| author | Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2025-07-01 13:49:36 +0200 |
|---|---|---|
| committer | Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2025-07-07 09:31:08 +0200 |
| commit | c4a834840596c8b9e388d430154959390f9f96e4 (patch) | |
| tree | 993d00504e905a167214edd449cea5b86f57b18f /drivers/gpio/gpio-mmio.c | |
| parent | e567269e246809223fafaee7d421ae17a832fae5 (diff) | |
gpio: mmio: get chip label and GPIO base from device properties
Ahead of removing struct bgpio_pdata support from the gpio-mmio generic
module, let's add support for getting the relevant values from generic
device properties. "label" is a semi-standardized property in some GPIO
drivers so let's go with it. There's no standard "base" property, so
let's use the name "gpio-mmio,base" to tie it to this driver
specifically. The number of GPIOs will be retrieved using
gpiochip_get_ngpios() so there's no need to look it up in the software
node.
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20250701-gpio-mmio-pdata-v2-2-ebf34d273497@linaro.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Diffstat (limited to 'drivers/gpio/gpio-mmio.c')
| -rw-r--r-- | drivers/gpio/gpio-mmio.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-mmio.c b/drivers/gpio/gpio-mmio.c index 5bb511204214..7d062f9a2c6a 100644 --- a/drivers/gpio/gpio-mmio.c +++ b/drivers/gpio/gpio-mmio.c @@ -715,6 +715,9 @@ MODULE_DEVICE_TABLE(of, bgpio_of_match); static struct bgpio_pdata *bgpio_parse_fw(struct device *dev, unsigned long *flags) { struct bgpio_pdata *pdata; + const char *label; + unsigned int base; + int ret; if (!dev_fwnode(dev)) return NULL; @@ -731,6 +734,18 @@ static struct bgpio_pdata *bgpio_parse_fw(struct device *dev, unsigned long *fla if (device_property_read_bool(dev, "no-output")) *flags |= BGPIOF_NO_OUTPUT; + ret = device_property_read_string(dev, "label", &label); + if (!ret) + pdata->label = label; + + /* + * This property *must not* be used in device-tree sources, it's only + * meant to be passed to the driver from board files and MFD core. + */ + ret = device_property_read_u32(dev, "gpio-mmio,base", &base); + if (!ret && base <= INT_MAX) + pdata->base = base; + return pdata; } |