thermal: rockchip: rk3368: fix efuse value of temp ajust code issue

bit 7 of efuse value of temp ajust code indecates positive or negtive.
if bit 7 is set, it indecats a negtive ajust code.

Change-Id: I2b604b6b5e566df08b871c817cf25541292575bc
Signed-off-by: Rocky Hao <rocky.hao@rock-chips.com>

diff --git a/drivers/thermal/rk3368_thermal.c b/drivers/thermal/rk3368_thermal.c
index ec7161dc8cab1c83b47a3d938aa5dc7871938947..290bd4d5aad89a5593948d99059871e460e2d6a8 100644 (file)
--- a/drivers/thermal/rk3368_thermal.c
+++ b/drivers/thermal/rk3368_thermal.c
@@ -260,7 +260,7 @@ static const struct chip_tsadc_table tsadc_table_3368 = {
        .mode = ADC_INCREMENT,
 };
 
-static int rk3368_get_ajust_code(struct device_node *np, u8 *ajust_code)
+static int rk3368_get_ajust_code(struct device_node *np, int *ajust_code)
 {
        struct nvmem_cell *cell;
        unsigned char *buf;
@@ -282,7 +282,11 @@ static int rk3368_get_ajust_code(struct device_node *np, u8 *ajust_code)
        if (buf[0] == INVALID_EFUSE_VALUE)
                return -EINVAL;
 
-       *ajust_code = buf[0];
+       if (buf[0] & 0x80)
+               *ajust_code = -(buf[0] & 0x7f);
+       else
+               *ajust_code = buf[0];
+
        kfree(buf);
 
        return 0;
@@ -847,7 +851,7 @@ static int rk3368_thermal_probe(struct platform_device *pdev)
        int i, j;
        int error;
        int uv;
-       u8 ajust_code = 0;
+       int ajust_code = 0;
 
        match = of_match_node(of_rk3368_thermal_match, np);
        if (!match)