pinctrl: single: Add request() api

Add pinctrl_ops->request api to configure pctrl
pad register in gpio mode.

Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.com>
Signed-off-by: Bharat Gooty <bharat.gooty@broadcom.com>
Acked-by: Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

diff --git a/drivers/pinctrl/pinctrl-single.c b/drivers/pinctrl/pinctrl-single.c
index 0f96cd5..8fc07e3 100644 (file)
--- 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)
 {
@@ -587,6 +620,7 @@ 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[] = {