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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-falcon.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-falcon.c')
-rw-r--r--drivers/pinctrl/pinctrl-falcon.c63
1 files changed, 36 insertions, 27 deletions
diff --git a/drivers/pinctrl/pinctrl-falcon.c b/drivers/pinctrl/pinctrl-falcon.c
index 4e731f24df85..2e62689b5e9f 100644
--- a/drivers/pinctrl/pinctrl-falcon.c
+++ b/drivers/pinctrl/pinctrl-falcon.c
@@ -238,7 +238,8 @@ static int falcon_pinconf_group_get(struct pinctrl_dev *pctrldev,
}
static int falcon_pinconf_group_set(struct pinctrl_dev *pctrldev,
- unsigned group, unsigned long config)
+ unsigned group, unsigned long *configs,
+ unsigned num_configs)
{
return -ENOTSUPP;
}
@@ -279,39 +280,47 @@ static int falcon_pinconf_get(struct pinctrl_dev *pctrldev,
}
static int falcon_pinconf_set(struct pinctrl_dev *pctrldev,
- unsigned pin, unsigned long config)
+ unsigned pin, unsigned long *configs,
+ unsigned num_configs)
{
- enum ltq_pinconf_param param = LTQ_PINCONF_UNPACK_PARAM(config);
- int arg = LTQ_PINCONF_UNPACK_ARG(config);
+ enum ltq_pinconf_param param;
+ int arg;
struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctrldev);
void __iomem *mem = info->membase[PORT(pin)];
u32 reg;
+ int i;
- switch (param) {
- case LTQ_PINCONF_PARAM_DRIVE_CURRENT:
- reg = LTQ_PADC_DCC;
- break;
-
- case LTQ_PINCONF_PARAM_SLEW_RATE:
- reg = LTQ_PADC_SRC;
- break;
-
- case LTQ_PINCONF_PARAM_PULL:
- if (arg == 1)
- reg = LTQ_PADC_PDEN;
- else
- reg = LTQ_PADC_PUEN;
- break;
+ for (i = 0; i < num_configs; i++) {
+ param = LTQ_PINCONF_UNPACK_PARAM(configs[i]);
+ arg = LTQ_PINCONF_UNPACK_ARG(configs[i]);
+
+ switch (param) {
+ case LTQ_PINCONF_PARAM_DRIVE_CURRENT:
+ reg = LTQ_PADC_DCC;
+ break;
+
+ case LTQ_PINCONF_PARAM_SLEW_RATE:
+ reg = LTQ_PADC_SRC;
+ break;
+
+ case LTQ_PINCONF_PARAM_PULL:
+ if (arg == 1)
+ reg = LTQ_PADC_PDEN;
+ else
+ reg = LTQ_PADC_PUEN;
+ break;
+
+ default:
+ pr_err("%s: Invalid config param %04x\n",
+ pinctrl_dev_get_name(pctrldev), param);
+ return -ENOTSUPP;
+ }
- default:
- pr_err("%s: Invalid config param %04x\n",
- pinctrl_dev_get_name(pctrldev), param);
- return -ENOTSUPP;
- }
+ pad_w32(mem, BIT(PORT_PIN(pin)), reg);
+ if (!(pad_r32(mem, reg) & BIT(PORT_PIN(pin))))
+ return -ENOTSUPP;
+ } /* for each config */
- pad_w32(mem, BIT(PORT_PIN(pin)), reg);
- if (!(pad_r32(mem, reg) & BIT(PORT_PIN(pin))))
- return -ENOTSUPP;
return 0;
}