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>

diff --git a/drivers/char/tpm/tpm_infineon.c b/drivers/char/tpm/tpm_infineon.c
index 6d49213..922f60e 100644 (file)
--- 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)