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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-sunxi.c
parentf5ba9c52bf1e236c4698c240955e5f119db62a28 (diff)
downloadop-kernel-dev-03b054e9696c3cbd3d5905ec96da15acd0a2fe8d.zip
op-kernel-dev-03b054e9696c3cbd3d5905ec96da15acd0a2fe8d.tar.gz
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-sunxi.c')
-rw-r--r--drivers/pinctrl/pinctrl-sunxi.c77
1 files changed, 41 insertions, 36 deletions
diff --git a/drivers/pinctrl/pinctrl-sunxi.c b/drivers/pinctrl/pinctrl-sunxi.c
index d251c76..8dbd465 100644
--- a/drivers/pinctrl/pinctrl-sunxi.c
+++ b/drivers/pinctrl/pinctrl-sunxi.c
@@ -274,50 +274,55 @@ static int sunxi_pconf_group_get(struct pinctrl_dev *pctldev,
static int sunxi_pconf_group_set(struct pinctrl_dev *pctldev,
unsigned group,
- unsigned long config)
+ unsigned long *configs,
+ unsigned num_configs)
{
struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
struct sunxi_pinctrl_group *g = &pctl->groups[group];
u32 val, mask;
u16 strength;
u8 dlevel;
+ int i;
- switch (pinconf_to_config_param(config)) {
- case PIN_CONFIG_DRIVE_STRENGTH:
- strength = pinconf_to_config_argument(config);
- if (strength > 40)
- return -EINVAL;
- /*
- * We convert from mA to what the register expects:
- * 0: 10mA
- * 1: 20mA
- * 2: 30mA
- * 3: 40mA
- */
- dlevel = strength / 10 - 1;
- val = readl(pctl->membase + sunxi_dlevel_reg(g->pin));
- mask = DLEVEL_PINS_MASK << sunxi_dlevel_offset(g->pin);
- writel((val & ~mask) | dlevel << sunxi_dlevel_offset(g->pin),
- pctl->membase + sunxi_dlevel_reg(g->pin));
- break;
- case PIN_CONFIG_BIAS_PULL_UP:
- val = readl(pctl->membase + sunxi_pull_reg(g->pin));
- mask = PULL_PINS_MASK << sunxi_pull_offset(g->pin);
- writel((val & ~mask) | 1 << sunxi_pull_offset(g->pin),
- pctl->membase + sunxi_pull_reg(g->pin));
- break;
- case PIN_CONFIG_BIAS_PULL_DOWN:
- val = readl(pctl->membase + sunxi_pull_reg(g->pin));
- mask = PULL_PINS_MASK << sunxi_pull_offset(g->pin);
- writel((val & ~mask) | 2 << sunxi_pull_offset(g->pin),
- pctl->membase + sunxi_pull_reg(g->pin));
- break;
- default:
- break;
- }
+ for (i = 0; i < num_configs; i++) {
+ switch (pinconf_to_config_param(configs[i])) {
+ case PIN_CONFIG_DRIVE_STRENGTH:
+ strength = pinconf_to_config_argument(configs[i]);
+ if (strength > 40)
+ return -EINVAL;
+ /*
+ * We convert from mA to what the register expects:
+ * 0: 10mA
+ * 1: 20mA
+ * 2: 30mA
+ * 3: 40mA
+ */
+ dlevel = strength / 10 - 1;
+ val = readl(pctl->membase + sunxi_dlevel_reg(g->pin));
+ mask = DLEVEL_PINS_MASK << sunxi_dlevel_offset(g->pin);
+ writel((val & ~mask)
+ | dlevel << sunxi_dlevel_offset(g->pin),
+ pctl->membase + sunxi_dlevel_reg(g->pin));
+ break;
+ case PIN_CONFIG_BIAS_PULL_UP:
+ val = readl(pctl->membase + sunxi_pull_reg(g->pin));
+ mask = PULL_PINS_MASK << sunxi_pull_offset(g->pin);
+ writel((val & ~mask) | 1 << sunxi_pull_offset(g->pin),
+ pctl->membase + sunxi_pull_reg(g->pin));
+ break;
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ val = readl(pctl->membase + sunxi_pull_reg(g->pin));
+ mask = PULL_PINS_MASK << sunxi_pull_offset(g->pin);
+ writel((val & ~mask) | 2 << sunxi_pull_offset(g->pin),
+ pctl->membase + sunxi_pull_reg(g->pin));
+ break;
+ default:
+ break;
+ }
- /* cache the config value */
- g->config = config;
+ /* cache the config value */
+ g->config = configs[i];
+ } /* for each config */
return 0;
}
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