Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-12-20 01:52:13 +00:00
Code Issues Packages Projects Releases Wiki Activity

i2c: nomadik: use pinctrl PM helpers

Browse Source 
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>
This commit is contained in:
Linus Walleij 2013-06-05 15:38:02 +02:00
parent 2b996fc500
commit ac844b6271
1 changed files with 10 additions and 80 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

88
drivers/i2c/busses/i2c-nomadik.c
View File

@ -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 {
/* Select default pin state */
pinctrl_pm_select_default_state(&adev->dev);
/* 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");
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;