[PATCH 2/2] gpio: mmio: Parse ngpios property

[Linus Walleij <linus.walleij@xxxxxxxxxx>]

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@xxxxxxxxxx>
---
 drivers/gpio/gpio-mmio.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpio/gpio-mmio.c b/drivers/gpio/gpio-mmio.c
index d89e78f0ead3..9e944c191551 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->ngpios = ngpios;
+
 	if (device_is_big_endian(dev))
 		*flags |= BGPIOF_BIG_ENDIAN_BYTE_ORDER;
 

-- 
2.46.2