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authorPeter Huewe <peterhuewe@gmx.de>2015-03-17 00:26:21 +0300
committerPeter Huewe <peterhuewe@gmx.de>2015-03-19 00:43:08 +0300
commit6b37729bd184fdd44f144c6cc4951b06b55bcf4b (patch)
tree0ead610ac95b4ea1b90def25a8da2998254c0e1b /drivers/char
parentce93b4b086b6497bb5809ba706dd9caa39cadbbe (diff)
downloadlinux-6b37729bd184fdd44f144c6cc4951b06b55bcf4b.tar.xz
tpm/tpm_infineon: Use struct dev_pm_ops for power management
Make the tpm_infineon driver define its PM callbacks through a struct dev_pm_ops object rather than by using legacy PM hooks in struct pnp_driver. This allows the driver to use tpm_pm_suspend() as its suspend callback directly, so we can remove the duplicated savestate code. Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Diffstat (limited to 'drivers/char')
-rw-r--r--drivers/char/tpm/tpm_infineon.c34
1 files changed, 9 insertions, 25 deletions
diff --git a/drivers/char/tpm/tpm_infineon.c b/drivers/char/tpm/tpm_infineon.c
index 6d492132ad2b..922f60e1e0a0 100644
--- a/drivers/char/tpm/tpm_infineon.c
+++ b/drivers/char/tpm/tpm_infineon.c
@@ -591,27 +591,8 @@ static void tpm_inf_pnp_remove(struct pnp_dev *dev)
}
}
-static int tpm_inf_pnp_suspend(struct pnp_dev *dev, pm_message_t pm_state)
-{
- struct tpm_chip *chip = pnp_get_drvdata(dev);
- int rc;
- if (chip) {
- u8 savestate[] = {
- 0, 193, /* TPM_TAG_RQU_COMMAND */
- 0, 0, 0, 10, /* blob length (in bytes) */
- 0, 0, 0, 152 /* TPM_ORD_SaveState */
- };
- dev_info(&dev->dev, "saving TPM state\n");
- rc = tpm_inf_send(chip, savestate, sizeof(savestate));
- if (rc < 0) {
- dev_err(&dev->dev, "error while saving TPM state\n");
- return rc;
- }
- }
- return 0;
-}
-
-static int tpm_inf_pnp_resume(struct pnp_dev *dev)
+#ifdef CONFIG_PM_SLEEP
+static int tpm_inf_resume(struct device *dev)
{
/* Re-configure TPM after suspending */
tpm_config_out(ENABLE_REGISTER_PAIR, TPM_INF_ADDR);
@@ -625,16 +606,19 @@ static int tpm_inf_pnp_resume(struct pnp_dev *dev)
tpm_config_out(DISABLE_REGISTER_PAIR, TPM_INF_ADDR);
/* disable RESET, LP and IRQC */
tpm_data_out(RESET_LP_IRQC_DISABLE, CMD);
- return tpm_pm_resume(&dev->dev);
+ return tpm_pm_resume(dev);
}
+#endif
+static SIMPLE_DEV_PM_OPS(tpm_inf_pm, tpm_pm_suspend, tpm_inf_resume);
static struct pnp_driver tpm_inf_pnp_driver = {
.name = "tpm_inf_pnp",
.id_table = tpm_inf_pnp_tbl,
.probe = tpm_inf_pnp_probe,
- .suspend = tpm_inf_pnp_suspend,
- .resume = tpm_inf_pnp_resume,
- .remove = tpm_inf_pnp_remove
+ .remove = tpm_inf_pnp_remove,
+ .driver = {
+ .pm = &tpm_inf_pm,
+ }
};
static int __init init_inf(void)