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Message-ID: <1370439873-30053-3-git-send-email-linus.walleij@stericsson.com>
Date: Wed, 5 Jun 2013 15:44:33 +0200
From: Linus Walleij <linus.walleij@...ricsson.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Stephen Warren <swarren@...dia.com>,
Kevin Hilman <khilman@...aro.org>
Cc: <linux-kernel@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
Linus Walleij <linus.walleij@...aro.org>,
Hebbar Gururaja <gururaja.hebbar@...com>,
Mark Brown <broonie@...nel.org>,
Dmitry Torokhov <dmitry.torokhov@...il.com>,
Stephen Warren <swarren@...dotorg.org>,
Wolfram Sang <wsa@...-dreams.de>
Subject: [PATCH 3/3] i2c: nomadik: use pinctrl PM helpers
From: Linus Walleij <linus.walleij@...aro.org>
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@...com>
Cc: Mark Brown <broonie@...nel.org>
Cc: Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc: Kevin Hilman <khilman@...aro.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Stephen Warren <swarren@...dotorg.org>
Cc: Wolfram Sang <wsa@...-dreams.de>
Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
---
I'm seeking Wolfram's ACK on this to take it through the
pinctrl tree in the end.
---
drivers/i2c/busses/i2c-nomadik.c | 90 +++++-----------------------------------
1 file changed, 10 insertions(+), 80 deletions(-)
diff --git a/drivers/i2c/busses/i2c-nomadik.c b/drivers/i2c/busses/i2c-nomadik.c
index 650293f..c7e3b0c 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;
--
1.7.11.3
--
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