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authorSherman Yin <syin@broadcom.com>2013-08-27 11:32:12 -0700
committerLinus Walleij <linus.walleij@linaro.org>2013-08-28 13:34:41 +0200
commit03b054e9696c3cbd3d5905ec96da15acd0a2fe8d (patch)
tree7123b780c194d350b3e5134c267e17262effb385 /drivers/pinctrl/pinctrl-imx.c
parentf5ba9c52bf1e236c4698c240955e5f119db62a28 (diff)
pinctrl: Pass all configs to driver on pin_config_set()
When setting pin configuration in the pinctrl framework, pin_config_set() or pin_config_group_set() is called in a loop to set one configuration at a time for the specified pin or group. This patch 1) removes the loop and 2) changes the API to pass the whole pin config array to the driver. It is now up to the driver to loop through the configs. This allows the driver to potentially combine configs and reduce the number of writes to pin config registers. All c files changed have been build-tested to verify the change compiles and that the corresponding .o is successfully generated. Signed-off-by: Sherman Yin <syin@broadcom.com> Reviewed-by: Christian Daudt <csd@broadcom.com> Reviewed-by: Matt Porter <matt.porter@linaro.org> Tested-by: Stephen Warren <swarren@nvidia.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/pinctrl-imx.c')
-rw-r--r--drivers/pinctrl/pinctrl-imx.c28
1 files changed, 16 insertions, 12 deletions
diff --git a/drivers/pinctrl/pinctrl-imx.c b/drivers/pinctrl/pinctrl-imx.c
index 360249301315..d78dd813bff9 100644
--- a/drivers/pinctrl/pinctrl-imx.c
+++ b/drivers/pinctrl/pinctrl-imx.c
@@ -323,11 +323,13 @@ static int imx_pinconf_get(struct pinctrl_dev *pctldev,
}
static int imx_pinconf_set(struct pinctrl_dev *pctldev,
- unsigned pin_id, unsigned long config)
+ unsigned pin_id, unsigned long *configs,
+ unsigned num_configs)
{
struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
const struct imx_pinctrl_soc_info *info = ipctl->info;
const struct imx_pin_reg *pin_reg = &info->pin_regs[pin_id];
+ int i;
if (!(info->flags & ZERO_OFFSET_VALID) && !pin_reg->conf_reg) {
dev_err(info->dev, "Pin(%s) does not support config function\n",
@@ -338,17 +340,19 @@ static int imx_pinconf_set(struct pinctrl_dev *pctldev,
dev_dbg(ipctl->dev, "pinconf set pin %s\n",
info->pins[pin_id].name);
- if (info->flags & SHARE_MUX_CONF_REG) {
- u32 reg;
- reg = readl(ipctl->base + pin_reg->conf_reg);
- reg &= ~0xffff;
- reg |= config;
- writel(reg, ipctl->base + pin_reg->conf_reg);
- } else {
- writel(config, ipctl->base + pin_reg->conf_reg);
- }
- dev_dbg(ipctl->dev, "write: offset 0x%x val 0x%lx\n",
- pin_reg->conf_reg, config);
+ for (i = 0; i < num_configs; i++) {
+ if (info->flags & SHARE_MUX_CONF_REG) {
+ u32 reg;
+ reg = readl(ipctl->base + pin_reg->conf_reg);
+ reg &= ~0xffff;
+ reg |= configs[i];
+ writel(reg, ipctl->base + pin_reg->conf_reg);
+ } else {
+ writel(configs[i], ipctl->base + pin_reg->conf_reg);
+ }
+ dev_dbg(ipctl->dev, "write: offset 0x%x val 0x%lx\n",
+ pin_reg->conf_reg, configs[i]);
+ } /* for each config */
return 0;
}