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authorLinus Walleij <linus.walleij@linaro.org>2013-06-05 15:38:02 +0200
committerLinus Walleij <linus.walleij@linaro.org>2013-06-16 11:56:52 +0200
commitac844b62713045557c834c8d5fe2863b8bbaf124 (patch)
tree33b5d914b373beccc6e591bf22eb14a88d26c862 /drivers/i2c
parent2b996fc50099f55d441470b55acc40c61f947025 (diff)
downloadlinux-ac844b62713045557c834c8d5fe2863b8bbaf124.tar.bz2
i2c: nomadik: use pinctrl PM helpers
This utilize the new pinctrl core PM helpers to transition the driver to "sleep" and "idle" states, cutting away some boilerplate code. Cc: Hebbar Gururaja <gururaja.hebbar@ti.com> Cc: Mark Brown <broonie@kernel.org> Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com> Cc: Kevin Hilman <khilman@linaro.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Stephen Warren <swarren@wwwdotorg.org> Acked-by: Wolfram Sang <wsa@the-dreams.de> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/i2c')
-rw-r--r--drivers/i2c/busses/i2c-nomadik.c90
1 files changed, 10 insertions, 80 deletions
diff --git a/drivers/i2c/busses/i2c-nomadik.c b/drivers/i2c/busses/i2c-nomadik.c
index 650293ff4d62..c7e3b0c1a1ca 100644
--- a/drivers/i2c/busses/i2c-nomadik.c
+++ b/drivers/i2c/busses/i2c-nomadik.c
@@ -148,10 +148,6 @@ struct i2c_nmk_client {
* @stop: stop condition.
* @xfer_complete: acknowledge completion for a I2C message.
* @result: controller propogated result.
- * @pinctrl: pinctrl handle.
- * @pins_default: default state for the pins.
- * @pins_idle: idle state for the pins.
- * @pins_sleep: sleep state for the pins.
* @busy: Busy doing transfer.
*/
struct nmk_i2c_dev {
@@ -165,11 +161,6 @@ struct nmk_i2c_dev {
int stop;
struct completion xfer_complete;
int result;
- /* Three pin states - default, idle & sleep */
- struct pinctrl *pinctrl;
- struct pinctrl_state *pins_default;
- struct pinctrl_state *pins_idle;
- struct pinctrl_state *pins_sleep;
bool busy;
};
@@ -645,13 +636,7 @@ static int nmk_i2c_xfer(struct i2c_adapter *i2c_adap,
}
/* Optionaly enable pins to be muxed in and configured */
- if (!IS_ERR(dev->pins_default)) {
- status = pinctrl_select_state(dev->pinctrl,
- dev->pins_default);
- if (status)
- dev_err(&dev->adev->dev,
- "could not set default pins\n");
- }
+ pinctrl_pm_select_default_state(&dev->adev->dev);
status = init_hw(dev);
if (status)
@@ -681,13 +666,7 @@ out:
clk_disable_unprepare(dev->clk);
out_clk:
/* Optionally let pins go into idle state */
- if (!IS_ERR(dev->pins_idle)) {
- status = pinctrl_select_state(dev->pinctrl,
- dev->pins_idle);
- if (status)
- dev_err(&dev->adev->dev,
- "could not set pins to idle state\n");
- }
+ pinctrl_pm_select_idle_state(&dev->adev->dev);
pm_runtime_put_sync(&dev->adev->dev);
@@ -882,41 +861,22 @@ static int nmk_i2c_suspend(struct device *dev)
{
struct amba_device *adev = to_amba_device(dev);
struct nmk_i2c_dev *nmk_i2c = amba_get_drvdata(adev);
- int ret;
if (nmk_i2c->busy)
return -EBUSY;
- if (!IS_ERR(nmk_i2c->pins_sleep)) {
- ret = pinctrl_select_state(nmk_i2c->pinctrl,
- nmk_i2c->pins_sleep);
- if (ret)
- dev_err(dev, "could not set pins to sleep state\n");
- }
+ pinctrl_pm_select_sleep_state(dev);
return 0;
}
static int nmk_i2c_resume(struct device *dev)
{
- struct amba_device *adev = to_amba_device(dev);
- struct nmk_i2c_dev *nmk_i2c = amba_get_drvdata(adev);
- int ret;
-
/* First go to the default state */
- if (!IS_ERR(nmk_i2c->pins_default)) {
- ret = pinctrl_select_state(nmk_i2c->pinctrl,
- nmk_i2c->pins_default);
- if (ret)
- dev_err(dev, "could not set pins to default state\n");
- }
+ pinctrl_pm_select_default_state(dev);
/* Then let's idle the pins until the next transfer happens */
- if (!IS_ERR(nmk_i2c->pins_idle)) {
- ret = pinctrl_select_state(nmk_i2c->pinctrl,
- nmk_i2c->pins_idle);
- if (ret)
- dev_err(dev, "could not set pins to idle state\n");
- }
+ pinctrl_pm_select_idle_state(dev);
+
return 0;
}
#else
@@ -1004,39 +964,10 @@ static int nmk_i2c_probe(struct amba_device *adev, const struct amba_id *id)
dev->adev = adev;
amba_set_drvdata(adev, dev);
- dev->pinctrl = devm_pinctrl_get(&adev->dev);
- if (IS_ERR(dev->pinctrl)) {
- ret = PTR_ERR(dev->pinctrl);
- goto err_pinctrl;
- }
-
- dev->pins_default = pinctrl_lookup_state(dev->pinctrl,
- PINCTRL_STATE_DEFAULT);
- if (IS_ERR(dev->pins_default)) {
- dev_err(&adev->dev, "could not get default pinstate\n");
- } else {
- ret = pinctrl_select_state(dev->pinctrl,
- dev->pins_default);
- if (ret)
- dev_dbg(&adev->dev, "could not set default pinstate\n");
- }
-
- dev->pins_idle = pinctrl_lookup_state(dev->pinctrl,
- PINCTRL_STATE_IDLE);
- if (IS_ERR(dev->pins_idle)) {
- dev_dbg(&adev->dev, "could not get idle pinstate\n");
- } else {
- /* If possible, let's go to idle until the first transfer */
- ret = pinctrl_select_state(dev->pinctrl,
- dev->pins_idle);
- if (ret)
- dev_dbg(&adev->dev, "could not set idle pinstate\n");
- }
-
- dev->pins_sleep = pinctrl_lookup_state(dev->pinctrl,
- PINCTRL_STATE_SLEEP);
- if (IS_ERR(dev->pins_sleep))
- dev_dbg(&adev->dev, "could not get sleep pinstate\n");
+ /* Select default pin state */
+ pinctrl_pm_select_default_state(&adev->dev);
+ /* If possible, let's go to idle until the first transfer */
+ pinctrl_pm_select_idle_state(&adev->dev);
dev->virtbase = ioremap(adev->res.start, resource_size(&adev->res));
if (!dev->virtbase) {
@@ -1106,7 +1037,6 @@ static int nmk_i2c_probe(struct amba_device *adev, const struct amba_id *id)
iounmap(dev->virtbase);
err_no_ioremap:
kfree(dev);
- err_pinctrl:
err_no_mem:
return ret;