[PATCH 5/7] thermal: mediatek: add flag for bank selection

[michael.kao]

From: Michael Kao <michael....@mediatek.com>

For past ic designs, the thermal controller should select banks before
reading the thermal sensor.
And the new ic design architecture removes this mechanism.

Signed-off-by: Michael Kao <michael....@mediatek.com>
---
 drivers/thermal/mtk_thermal.c | 20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)

diff --git a/drivers/thermal/mtk_thermal.c b/drivers/thermal/mtk_thermal.c
index e5cf3f4..3e97638 100644
--- a/drivers/thermal/mtk_thermal.c
+++ b/drivers/thermal/mtk_thermal.c
@@ -213,6 +213,7 @@ struct mtk_thermal_data {
        const int cali_val;
        const int num_controller;
        const int *controller_offset;
+       bool need_switch_bank;
        struct thermal_bank_cfg bank_data[];
 };
 
@@ -327,6 +328,7 @@ struct mtk_thermal {
        .cali_val = MT8173_CALIBRATION,
        .num_controller = MT8173_NUM_CONTROLLER,
        .controller_offset = mt8173_tc_offset,
+       .need_switch_bank = true,
        .bank_data = {
                {
                        .num_sensors = 2,
@@ -365,6 +367,7 @@ struct mtk_thermal {
        .cali_val = MT2701_CALIBRATION,
        .num_controller = MT2701_NUM_CONTROLLER,
        .controller_offset = mt2701_tc_offset,
+       .need_switch_bank = true,
        .bank_data = {
                {
                        .num_sensors = 3,
@@ -394,6 +397,7 @@ struct mtk_thermal {
        .cali_val = MT2712_CALIBRATION,
        .num_controller = MT2712_NUM_CONTROLLER,
        .controller_offset = mt2712_tc_offset,
+       .need_switch_bank = true,
        .bank_data = {
                {
                        .num_sensors = 4,
@@ -417,6 +421,7 @@ struct mtk_thermal {
        .cali_val = MT7622_CALIBRATION,
        .num_controller = MT7622_NUM_CONTROLLER,
        .controller_offset = mt7622_tc_offset,
+       .need_switch_bank = true,
        .bank_data = {
                {
                        .num_sensors = 1,
@@ -463,12 +468,14 @@ static void mtk_thermal_get_bank(struct mtk_thermal_bank 
*bank)
        struct mtk_thermal *mt = bank->mt;
        u32 val;
 
-       mutex_lock(&mt->lock);
+       if (mt->conf->need_switch_bank) {
+               mutex_lock(&mt->lock);
 
-       val = readl(mt->thermal_base + PTPCORESEL);
-       val &= ~0xf;
-       val |= bank->id;
-       writel(val, mt->thermal_base + PTPCORESEL);
+               val = readl(mt->thermal_base + PTPCORESEL);
+               val &= ~0xf;
+               val |= bank->id;
+               writel(val, mt->thermal_base + PTPCORESEL);
+       }
 }
 
 /**
@@ -481,7 +488,8 @@ static void mtk_thermal_put_bank(struct mtk_thermal_bank 
*bank)
 {
        struct mtk_thermal *mt = bank->mt;
 
-       mutex_unlock(&mt->lock);
+       if (mt->conf->need_switch_bank)
+               mutex_unlock(&mt->lock);
 }
 
 /**
-- 
1.9.1