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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-st.c
parentf5ba9c52bf1e236c4698c240955e5f119db62a28 (diff)
downloadlinux-03b054e9696c3cbd3d5905ec96da15acd0a2fe8d.tar.bz2
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-st.c')
-rw-r--r--drivers/pinctrl/pinctrl-st.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/pinctrl/pinctrl-st.c b/drivers/pinctrl/pinctrl-st.c
index 2a10a318b648..9cadc68ee572 100644
--- a/drivers/pinctrl/pinctrl-st.c
+++ b/drivers/pinctrl/pinctrl-st.c
@@ -909,15 +909,18 @@ static void st_pinconf_set_retime(struct st_pinctrl *info,
config, pin);
}
-static int st_pinconf_set(struct pinctrl_dev *pctldev,
- unsigned pin_id, unsigned long config)
+static int st_pinconf_set(struct pinctrl_dev *pctldev, unsigned pin_id,
+ unsigned long *configs, unsigned num_configs)
{
int pin = st_gpio_pin(pin_id);
struct st_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
struct st_pio_control *pc = st_get_pio_control(pctldev, pin_id);
+ int i;
- st_pinconf_set_config(pc, pin, config);
- st_pinconf_set_retime(info, pc, pin, config);
+ for (i = 0; i < num_configs; i++) {
+ st_pinconf_set_config(pc, pin, configs[i]);
+ st_pinconf_set_retime(info, pc, pin, configs[i]);
+ } /* for each config */
return 0;
}