From: Bharat Gooty Add pinctrl_ops->request api to configure pctrl pad register in gpio mode. Signed-off-by: Rayagonda Kokatanur Signed-off-by: Bharat Gooty Acked-by: Rayagonda Kokatanur Reviewed-by: Simon Glass Signed-off-by: Roman Bacik --- (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[] = { -- 2.17.1 -- This electronic communication and the information and any files transmitted with it, or attached to it, are confidential and are intended solely for the use of the individual or entity to whom it is addressed and may contain information that is confidential, legally privileged, protected by privacy laws, or otherwise restricted from disclosure to anyone else. If you are not the intended recipient or the person responsible for delivering the e-mail to the intended recipient, you are hereby notified that any use, copying, distributing, dissemination, forwarding, printing, or copying of this e-mail is strictly prohibited. If you received this e-mail in error, please return the e-mail to the sender, delete it from your computer, and destroy any printed copy of it.