soc: mediatek: mtk-svs: use common function to disable restore voltages

The timing of disabling SVS bank and restore default voltage is more
than one place. Therefore, add a common function to use for removing
the superfluous codes.

Signed-off-by: Roger Lu <roger.lu@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20230202124104.16504-3-roger.lu@mediatek.com
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>

Author: mtk-rogerlu

drivers/soc/mediatek/mtk-svs.c

@@ -624,6 +624,25 @@ static int svs_adjust_pm_opp_volts(struct svs_bank *svsb)
 	return ret;
 }
 
+static void svs_bank_disable_and_restore_default_volts(struct svs_platform *svsp,
+						       struct svs_bank *svsb)
+{
+	unsigned long flags;
+
+	if (svsb->mode_support == SVSB_MODE_ALL_DISABLE)
+		return;
+
+	spin_lock_irqsave(&svs_lock, flags);
+	svsp->pbank = svsb;
+	svs_switch_bank(svsp);
+	svs_writel_relaxed(svsp, SVSB_PTPEN_OFF, SVSEN);
+	svs_writel_relaxed(svsp, SVSB_INTSTS_VAL_CLEAN, INTSTS);
+	spin_unlock_irqrestore(&svs_lock, flags);
+
+	svsb->phase = SVSB_PHASE_ERROR;
+	svs_adjust_pm_opp_volts(svsb);
+}
+
 #ifdef CONFIG_DEBUG_FS
 static int svs_dump_debug_show(struct seq_file *m, void *p)
 {
@@ -700,7 +719,6 @@ static ssize_t svs_enable_debug_write(struct file *filp,
 {
 	struct svs_bank *svsb = file_inode(filp)->i_private;
 	struct svs_platform *svsp = dev_get_drvdata(svsb->dev);
-	unsigned long flags;
 	int enabled, ret;
 	char *buf = NULL;
 
@@ -716,16 +734,8 @@ static ssize_t svs_enable_debug_write(struct file *filp,
 		return ret;
 
 	if (!enabled) {
-		spin_lock_irqsave(&svs_lock, flags);
-		svsp->pbank = svsb;
+		svs_bank_disable_and_restore_default_volts(svsp, svsb);
 		svsb->mode_support = SVSB_MODE_ALL_DISABLE;
-		svs_switch_bank(svsp);
-		svs_writel_relaxed(svsp, SVSB_PTPEN_OFF, SVSEN);
-		svs_writel_relaxed(svsp, SVSB_INTSTS_VAL_CLEAN, INTSTS);
-		spin_unlock_irqrestore(&svs_lock, flags);
-
-		svsb->phase = SVSB_PHASE_ERROR;
-		svs_adjust_pm_opp_volts(svsb);
 	}
 
 	kfree(buf);
@@ -1508,16 +1518,7 @@ static int svs_init02(struct svs_platform *svsp)
 out_of_init02:
 	for (idx = 0; idx < svsp->bank_max; idx++) {
 		svsb = &svsp->banks[idx];
-
-		spin_lock_irqsave(&svs_lock, flags);
-		svsp->pbank = svsb;
-		svs_switch_bank(svsp);
-		svs_writel_relaxed(svsp, SVSB_PTPEN_OFF, SVSEN);
-		svs_writel_relaxed(svsp, SVSB_INTSTS_VAL_CLEAN, INTSTS);
-		spin_unlock_irqrestore(&svs_lock, flags);
-
-		svsb->phase = SVSB_PHASE_ERROR;
-		svs_adjust_pm_opp_volts(svsb);
+		svs_bank_disable_and_restore_default_volts(svsp, svsb);
 	}
 
 	return ret;
@@ -1563,23 +1564,12 @@ static int svs_suspend(struct device *dev)
 {
 	struct svs_platform *svsp = dev_get_drvdata(dev);
 	struct svs_bank *svsb;
-	unsigned long flags;
 	int ret;
 	u32 idx;
 
 	for (idx = 0; idx < svsp->bank_max; idx++) {
 		svsb = &svsp->banks[idx];
-
-		/* This might wait for svs_isr() process */
-		spin_lock_irqsave(&svs_lock, flags);
-		svsp->pbank = svsb;
-		svs_switch_bank(svsp);
-		svs_writel_relaxed(svsp, SVSB_PTPEN_OFF, SVSEN);
-		svs_writel_relaxed(svsp, SVSB_INTSTS_VAL_CLEAN, INTSTS);
-		spin_unlock_irqrestore(&svs_lock, flags);
-
-		svsb->phase = SVSB_PHASE_ERROR;
-		svs_adjust_pm_opp_volts(svsb);
+		svs_bank_disable_and_restore_default_volts(svsp, svsb);
 	}
 
 	ret = reset_control_assert(svsp->rst);