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authorSherman Yin <syin@broadcom.com>2013-08-27 22:32:12 +0400
committerLinus Walleij <linus.walleij@linaro.org>2013-08-28 15:34:41 +0400
commit03b054e9696c3cbd3d5905ec96da15acd0a2fe8d (patch)
tree7123b780c194d350b3e5134c267e17262effb385 /drivers/pinctrl/pinctrl-nomadik.c
parentf5ba9c52bf1e236c4698c240955e5f119db62a28 (diff)
downloadlinux-03b054e9696c3cbd3d5905ec96da15acd0a2fe8d.tar.xz
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-nomadik.c')
-rw-r--r--drivers/pinctrl/pinctrl-nomadik.c125
1 files changed, 67 insertions, 58 deletions
diff --git a/drivers/pinctrl/pinctrl-nomadik.c b/drivers/pinctrl/pinctrl-nomadik.c
index f7c7279d081a..d7c3ae300fa7 100644
--- a/drivers/pinctrl/pinctrl-nomadik.c
+++ b/drivers/pinctrl/pinctrl-nomadik.c
@@ -1695,7 +1695,7 @@ static int nmk_pin_config_get(struct pinctrl_dev *pctldev, unsigned pin,
}
static int nmk_pin_config_set(struct pinctrl_dev *pctldev, unsigned pin,
- unsigned long config)
+ unsigned long *configs, unsigned num_configs)
{
static const char *pullnames[] = {
[NMK_GPIO_PULL_NONE] = "none",
@@ -1712,20 +1712,9 @@ static int nmk_pin_config_set(struct pinctrl_dev *pctldev, unsigned pin,
struct pinctrl_gpio_range *range;
struct gpio_chip *chip;
unsigned bit;
-
- /*
- * The pin config contains pin number and altfunction fields, here
- * we just ignore that part. It's being handled by the framework and
- * pinmux callback respectively.
- */
- pin_cfg_t cfg = (pin_cfg_t) config;
- int pull = PIN_PULL(cfg);
- int slpm = PIN_SLPM(cfg);
- int output = PIN_DIR(cfg);
- int val = PIN_VAL(cfg);
- bool lowemi = PIN_LOWEMI(cfg);
- bool gpiomode = PIN_GPIOMODE(cfg);
- bool sleep = PIN_SLEEPMODE(cfg);
+ pin_cfg_t cfg;
+ int pull, slpm, output, val, i;
+ bool lowemi, gpiomode, sleep;
range = nmk_match_gpio_range(pctldev, pin);
if (!range) {
@@ -1740,54 +1729,74 @@ static int nmk_pin_config_set(struct pinctrl_dev *pctldev, unsigned pin,
chip = range->gc;
nmk_chip = container_of(chip, struct nmk_gpio_chip, chip);
- if (sleep) {
- int slpm_pull = PIN_SLPM_PULL(cfg);
- int slpm_output = PIN_SLPM_DIR(cfg);
- int slpm_val = PIN_SLPM_VAL(cfg);
-
- /* All pins go into GPIO mode at sleep */
- gpiomode = true;
-
+ for (i = 0; i < num_configs; i++) {
/*
- * The SLPM_* values are normal values + 1 to allow zero to
- * mean "same as normal".
+ * The pin config contains pin number and altfunction fields,
+ * here we just ignore that part. It's being handled by the
+ * framework and pinmux callback respectively.
*/
- if (slpm_pull)
- pull = slpm_pull - 1;
- if (slpm_output)
- output = slpm_output - 1;
- if (slpm_val)
- val = slpm_val - 1;
-
- dev_dbg(nmk_chip->chip.dev, "pin %d: sleep pull %s, dir %s, val %s\n",
- pin,
- slpm_pull ? pullnames[pull] : "same",
- slpm_output ? (output ? "output" : "input") : "same",
- slpm_val ? (val ? "high" : "low") : "same");
- }
+ cfg = (pin_cfg_t) configs[i];
+ pull = PIN_PULL(cfg);
+ slpm = PIN_SLPM(cfg);
+ output = PIN_DIR(cfg);
+ val = PIN_VAL(cfg);
+ lowemi = PIN_LOWEMI(cfg);
+ gpiomode = PIN_GPIOMODE(cfg);
+ sleep = PIN_SLEEPMODE(cfg);
+
+ if (sleep) {
+ int slpm_pull = PIN_SLPM_PULL(cfg);
+ int slpm_output = PIN_SLPM_DIR(cfg);
+ int slpm_val = PIN_SLPM_VAL(cfg);
+
+ /* All pins go into GPIO mode at sleep */
+ gpiomode = true;
+
+ /*
+ * The SLPM_* values are normal values + 1 to allow zero
+ * to mean "same as normal".
+ */
+ if (slpm_pull)
+ pull = slpm_pull - 1;
+ if (slpm_output)
+ output = slpm_output - 1;
+ if (slpm_val)
+ val = slpm_val - 1;
+
+ dev_dbg(nmk_chip->chip.dev,
+ "pin %d: sleep pull %s, dir %s, val %s\n",
+ pin,
+ slpm_pull ? pullnames[pull] : "same",
+ slpm_output ? (output ? "output" : "input")
+ : "same",
+ slpm_val ? (val ? "high" : "low") : "same");
+ }
- dev_dbg(nmk_chip->chip.dev, "pin %d [%#lx]: pull %s, slpm %s (%s%s), lowemi %s\n",
- pin, cfg, pullnames[pull], slpmnames[slpm],
- output ? "output " : "input",
- output ? (val ? "high" : "low") : "",
- lowemi ? "on" : "off");
+ dev_dbg(nmk_chip->chip.dev,
+ "pin %d [%#lx]: pull %s, slpm %s (%s%s), lowemi %s\n",
+ pin, cfg, pullnames[pull], slpmnames[slpm],
+ output ? "output " : "input",
+ output ? (val ? "high" : "low") : "",
+ lowemi ? "on" : "off");
- clk_enable(nmk_chip->clk);
- bit = pin % NMK_GPIO_PER_CHIP;
- if (gpiomode)
- /* No glitch when going to GPIO mode */
- __nmk_gpio_set_mode(nmk_chip, bit, NMK_GPIO_ALT_GPIO);
- if (output)
- __nmk_gpio_make_output(nmk_chip, bit, val);
- else {
- __nmk_gpio_make_input(nmk_chip, bit);
- __nmk_gpio_set_pull(nmk_chip, bit, pull);
- }
- /* TODO: isn't this only applicable on output pins? */
- __nmk_gpio_set_lowemi(nmk_chip, bit, lowemi);
+ clk_enable(nmk_chip->clk);
+ bit = pin % NMK_GPIO_PER_CHIP;
+ if (gpiomode)
+ /* No glitch when going to GPIO mode */
+ __nmk_gpio_set_mode(nmk_chip, bit, NMK_GPIO_ALT_GPIO);
+ if (output)
+ __nmk_gpio_make_output(nmk_chip, bit, val);
+ else {
+ __nmk_gpio_make_input(nmk_chip, bit);
+ __nmk_gpio_set_pull(nmk_chip, bit, pull);
+ }
+ /* TODO: isn't this only applicable on output pins? */
+ __nmk_gpio_set_lowemi(nmk_chip, bit, lowemi);
+
+ __nmk_gpio_set_slpm(nmk_chip, bit, slpm);
+ clk_disable(nmk_chip->clk);
+ } /* for each config */
- __nmk_gpio_set_slpm(nmk_chip, bit, slpm);
- clk_disable(nmk_chip->clk);
return 0;
}