From: Bharat Gooty <bharat.go...@broadcom.com> Add pinctrl_ops->request api to configure pctrl pad register in gpio mode.
Signed-off-by: Rayagonda Kokatanur <rayagonda.kokata...@broadcom.com>
Signed-off-by: Bharat Gooty <bharat.go...@broadcom.com>
Acked-by: Rayagonda Kokatanur <rayagonda.kokata...@broadcom.com>
Reviewed-by: Simon Glass <s...@chromium.org>
Signed-off-by: Roman Bacik <roman.ba...@broadcom.com>
---
(no changes since v2)
Changes in v2:
- simplify comment before struct single_gpiofunc_range
- add pinctrl-single binding document from Linux
- return error code from single-probe()
drivers/pinctrl/pinctrl-single.c | 34 ++++++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)
diff --git a/drivers/pinctrl/pinctrl-single.c b/drivers/pinctrl/pinctrl-single.c
index 5ed225f2a839..a4ec6a54fdcd 100644
--- a/drivers/pinctrl/pinctrl-single.c
+++ b/drivers/pinctrl/pinctrl-single.c
@@ -250,6 +250,39 @@ static int single_get_pin_muxing(struct udevice *dev,
unsigned int pin,
return 0;
}
+static int single_request(struct udevice *dev, int pin, int flags)
+{
+ struct single_priv *priv = dev_get_priv(dev);
+ struct single_pdata *pdata = dev_get_plat(dev);
+ struct single_gpiofunc_range *frange = NULL;
+ struct list_head *pos, *tmp;
+ phys_addr_t reg;
+ int mux_bytes = 0;
+ u32 data;
+
+ /* If function mask is null, needn't enable it. */
+ if (!pdata->mask)
+ return -ENOTSUPP;
+
+ list_for_each_safe(pos, tmp, &priv->gpiofuncs) {
+ frange = list_entry(pos, struct single_gpiofunc_range, node);
+ if ((pin >= frange->offset + frange->npins) ||
+ pin < frange->offset)
+ continue;
+
+ mux_bytes = pdata->width / BITS_PER_BYTE;
+ reg = pdata->base + pin * mux_bytes;
+
+ data = single_read(dev, reg);
+ data &= ~pdata->mask;
+ data |= frange->gpiofunc;
+ single_write(dev, data, reg);
+ break;
+ }
+
+ return 0;
+}
+
static struct single_func *single_allocate_function(struct udevice *dev,
unsigned int group_pins)
{
@@ -591,6 +624,7 @@ const struct pinctrl_ops single_pinctrl_ops = {
.get_pin_name = single_get_pin_name,
.set_state = single_set_state,
.get_pin_muxing = single_get_pin_muxing,
+ .request = single_request,
};
static const struct udevice_id single_pinctrl_match[] = {
--
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