ARM: OMAP2+: AM33XX: Update the hardreset API

WKUP-M3 has a reset status bit (RM_WKUP_STST.WKUP_M3_LRST)
Update the hardreset API to ensure that the reset line properly
deasserted.

Signed-off-by: Vaibhav Bedia <vaibhav.bedia@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: Paul Walmsley <paul@pwsan.com>

arch/arm/mach-omap2/omap_hwmod.c

@@ -3041,11 +3041,8 @@ static int _am33xx_assert_hardreset(struct omap_hwmod *oh,
 static int _am33xx_deassert_hardreset(struct omap_hwmod *oh,
 				     struct omap_hwmod_rst_info *ohri)
 {
-	if (ohri->st_shift)
-		pr_err("omap_hwmod: %s: %s: hwmod data error: OMAP4 does not support st_shift\n",
-		       oh->name, ohri->name);
-
 	return am33xx_prm_deassert_hardreset(ohri->rst_shift,
+				ohri->st_shift,
 				oh->clkdm->pwrdm.ptr->prcm_offs,
 				oh->prcm.omap4.rstctrl_offs,
 				oh->prcm.omap4.rstst_offs);

arch/arm/mach-omap2/prm33xx.c

@@ -110,23 +110,26 @@ int am33xx_prm_assert_hardreset(u8 shift, s16 inst, u16 rstctrl_offs)
  * -EINVAL upon an argument error, -EEXIST if the submodule was already out
  * of reset, or -EBUSY if the submodule did not exit reset promptly.
  */
-int am33xx_prm_deassert_hardreset(u8 shift, s16 inst,
+int am33xx_prm_deassert_hardreset(u8 shift, u8 st_shift, s16 inst,
 		u16 rstctrl_offs, u16 rstst_offs)
 {
 	int c;
-	u32 mask = 1 << shift;
+	u32 mask = 1 << st_shift;
 
 	/* Check the current status to avoid  de-asserting the line twice */
 	if (am33xx_prm_is_hardreset_asserted(shift, inst, rstctrl_offs) == 0)
 		return -EEXIST;
 
 	/* Clear the reset status by writing 1 to the status bit */
 	am33xx_prm_rmw_reg_bits(0xffffffff, mask, inst, rstst_offs);
+
 	/* de-assert the reset control line */
+	mask = 1 << shift;
+
 	am33xx_prm_rmw_reg_bits(mask, 0, inst, rstctrl_offs);
-	/* wait the status to be set */
 
-	omap_test_timeout(am33xx_prm_is_hardreset_asserted(shift, inst,
+	/* wait the status to be set */
+	omap_test_timeout(am33xx_prm_is_hardreset_asserted(st_shift, inst,
 							   rstst_offs),
 			  MAX_MODULE_HARDRESET_WAIT, c);
 

arch/arm/mach-omap2/prm33xx.h

@@ -125,7 +125,7 @@ extern void am33xx_prm_global_warm_sw_reset(void);
 extern int am33xx_prm_is_hardreset_asserted(u8 shift, s16 inst,
 		u16 rstctrl_offs);
 extern int am33xx_prm_assert_hardreset(u8 shift, s16 inst, u16 rstctrl_offs);
-extern int am33xx_prm_deassert_hardreset(u8 shift, s16 inst,
+extern int am33xx_prm_deassert_hardreset(u8 shift, u8 st_shift, s16 inst,
 		u16 rstctrl_offs, u16 rstst_offs);
 #endif /* ASSEMBLER */
 #endif