thermal: rockchip: handle set_trips without the trip points

In some cases, some sensors didn't need the trip points, the
set_trips will pass {-INT_MAX, INT_MAX} to trigger tsadc alarm in the end,
ignore this case and disable the high temperature interrupt.

Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Reviewed-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>

1 files changed, 15 insertions, 1 deletions

diff --git a/drivers/thermal/rockchip_thermal.c b/drivers/thermal/rockchip_thermal.c
index cacc12b44ca1..cbbf0ce2302c 100644
--- a/drivers/thermal/rockchip_thermal.c
+++ b/drivers/thermal/rockchip_thermal.c
@@ -674,7 +674,21 @@ static int rk_tsadcv2_get_temp(const struct chip_tsadc_table *table,
 static int rk_tsadcv2_alarm_temp(const struct chip_tsadc_table *table,
                                  int chn, void __iomem *regs, int temp)
 {
-        u32 alarm_value, int_en;
+        u32 alarm_value;
+        u32 int_en, int_clr;
+
+        /*
+         * In some cases, some sensors didn't need the trip points, the
+         * set_trips will pass {-INT_MAX, INT_MAX} to trigger tsadc alarm
+         * in the end, ignore this case and disable the high temperature
+         * interrupt.
+         */
+        if (temp == INT_MAX) {
+                int_clr = readl_relaxed(regs + TSADCV2_INT_EN);
+                int_clr &= ~TSADCV2_INT_SRC_EN(chn);
+                writel_relaxed(int_clr, regs + TSADCV2_INT_EN);
+                return 0;
+        }
 
         /* Make sure the value is valid */
         alarm_value = rk_tsadcv2_temp_to_code(table, temp);