diff mbox series

[v2,2/2] gpio: mmio: Parse ngpios property

Message ID 20241017-gpio-ngpios-v2-2-cecfdb38d40e@linaro.org
State New
Headers show
Series gpio: mmio: Support ngpios property | expand

Commit Message

Linus Walleij Oct. 17, 2024, 6:46 a.m. UTC 
This makes the MMIO GPIO driver parse the ngpios property from
devices instatiated directly from the device tree so we can
further restrict the number of GPIOs down from the number of
bits on the target register.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 drivers/gpio/gpio-mmio.c | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/drivers/gpio/gpio-mmio.c b/drivers/gpio/gpio-mmio.c
index d89e78f0ead3..c772f1b6e694 100644
--- a/drivers/gpio/gpio-mmio.c
+++ b/drivers/gpio/gpio-mmio.c
@@ -694,6 +694,7 @@  MODULE_DEVICE_TABLE(of, bgpio_of_match);
 static struct bgpio_pdata *bgpio_parse_fw(struct device *dev, unsigned long *flags)
 {
 	struct bgpio_pdata *pdata;
+	u32 ngpios;
 
 	if (!dev_fwnode(dev))
 		return NULL;
@@ -704,6 +705,9 @@  static struct bgpio_pdata *bgpio_parse_fw(struct device *dev, unsigned long *fla
 
 	pdata->base = -1;
 
+	if (!device_property_read_u32(dev, "ngpios", &ngpios))
+		pdata->ngpio = ngpios;
+
 	if (device_is_big_endian(dev))
 		*flags |= BGPIOF_BIG_ENDIAN_BYTE_ORDER;