linux-kernel - [PATCH] char/tpm: Use struct dev_pm

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Date:	Thu,  6 Dec 2012 01:20:51 +0100
From:	Peter Huewe <peterhuewe@....de>
To:	Kent Yoder <key@...ux.vnet.ibm.com>
Cc:	Peter Huewe <PeterHuewe@....de>,
	Mathias LEBLANC <Mathias.LEBLANC@...com>,
	Jean-Luc BLANC <jean-luc.blanc@...com>,
	"Sirrix@...per.es" <Sirrix@...per.es>,
	linux-kernel@...r.kernel.org, Rajiv Andrade <mail@...jiv.net>,
	"tpmdd-devel@...ts.sourceforge.net" 
	<tpmdd-devel@...ts.sourceforge.net>,
	Kent Yoder <shpedoikal@...il.com>,
	Peter Huewe <peterhuewe@....de>
Subject: [PATCH] char/tpm: Use struct dev_pm_ops for power management

This patch converts the suspend and resume functions for
tpm_i2c_stm_st33 to the new dev_pm_ops.

Signed-off-by: Peter Huewe <peterhuewe@....de>
---
Note:
I'm sending this patch on behalf of myself only and nobody else, 
especially not my employer - and I'm doing this in my spare time.
I have to inform you that I'm working for a direct competitor of the driver author,
but I'm not using any knowledge that is considered secret in any way.
I have a personal interest in the TPM subsystem and want to keep it as clean as possible.


 drivers/char/tpm/tpm_i2c_stm_st33.c |   25 ++++++++++---------------
 1 files changed, 10 insertions(+), 15 deletions(-)

diff --git a/drivers/char/tpm/tpm_i2c_stm_st33.c b/drivers/char/tpm/tpm_i2c_stm_st33.c
index b11201f..ecbb81e 100644
--- a/drivers/char/tpm/tpm_i2c_stm_st33.c
+++ b/drivers/char/tpm/tpm_i2c_stm_st33.c
@@ -826,12 +826,10 @@ static __devexit int tpm_st33_i2c_remove(struct i2c_client *client)
  * @param: mesg, the power management message.
  * @return: 0 in case of success.
  */
-static int tpm_st33_i2c_pm_suspend(struct i2c_client *client, pm_message_t mesg)
+static int tpm_st33_i2c_pm_suspend(struct device *dev)
 {
-	struct tpm_chip *chip =
-	    (struct tpm_chip *)i2c_get_clientdata(client);
-	struct st33zp24_platform_data *pin_infos =
-		((struct i2c_client *)TPM_VPRIV(chip))->dev.platform_data;
+	struct tpm_chip *chip = dev_get_drvdata(dev);
+	struct st33zp24_platform_data *pin_infos = dev->platform_data;
 	int ret = 0;
 
 	if (power_mgt)
@@ -839,7 +837,7 @@ static int tpm_st33_i2c_pm_suspend(struct i2c_client *client, pm_message_t mesg)
 	else{
 		if (chip->data_buffer == NULL)
 			chip->data_buffer = pin_infos->tpm_i2c_buffer[0];
-		ret = tpm_pm_suspend(&client->dev);
+		ret = tpm_pm_suspend(dev);
 	}
 	return ret;
 }				/* tpm_st33_i2c_suspend() */
@@ -849,12 +847,10 @@ static int tpm_st33_i2c_pm_suspend(struct i2c_client *client, pm_message_t mesg)
  * @param: client, the i2c_client drescription (TPM I2C description).
  * @return: 0 in case of success.
  */
-static int tpm_st33_i2c_pm_resume(struct i2c_client *client)
+static int tpm_st33_i2c_pm_resume(struct device *dev)
 {
-	struct tpm_chip *chip =
-	    (struct tpm_chip *)i2c_get_clientdata(client);
-	struct st33zp24_platform_data *pin_infos =
-		((struct i2c_client *)TPM_VPRIV(chip))->dev.platform_data;
+	struct tpm_chip *chip = dev_get_drvdata(dev);
+	struct st33zp24_platform_data *pin_infos = dev->platform_data;
 
 	int ret = 0;
 
@@ -867,7 +863,7 @@ static int tpm_st33_i2c_pm_resume(struct i2c_client *client)
 	} else{
 	if (chip->data_buffer == NULL)
 		chip->data_buffer = pin_infos->tpm_i2c_buffer[0];
-	ret = tpm_pm_resume(&client->dev);
+	ret = tpm_pm_resume(dev);
 	if (!ret)
 		tpm_do_selftest(chip);
 	}
@@ -880,16 +876,15 @@ static const struct i2c_device_id tpm_st33_i2c_id[] = {
 };
 
 MODULE_DEVICE_TABLE(i2c, tpm_st33_i2c_id);
-
+static SIMPLE_DEV_PM_OPS(tpm_st33_i2c_ops, tpm_st33_i2c_pm_suspend, tpm_st33_i2c_pm_resume);
 static struct i2c_driver tpm_st33_i2c_driver = {
 	.driver = {
 		   .owner = THIS_MODULE,
 		   .name = TPM_ST33_I2C,
+		   .pm = &tpm_st33_i2c_ops,
 		   },
 	.probe = tpm_st33_i2c_probe,
 	.remove = tpm_st33_i2c_remove,
-	.resume = tpm_st33_i2c_pm_resume,
-	.suspend = tpm_st33_i2c_pm_suspend,
 	.id_table = tpm_st33_i2c_id
 };
 
-- 
1.7.8.6

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