Change in coreboot[master]: superio/f71869ad: Add temperature sensor type

[Renze Nicolai (Code Review)]

Renze Nicolai has uploaded this change for review. ( https://review.coreboot.org/22935

Change subject: superio/f71869ad: Add temperature sensor type
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superio/f71869ad: Add temperature sensor type

This patch makes it possible to set the "Temperature Sensor Type Register"
at index 6Bh from the devicetree, allowing the use of thermistors instead of
BJT type sensors.

Register documentation (from page 60 of the F71869 datasheet):

6.6.25 Temperature Sensor Type Register - Index 6Bh
Bit 7-4: reserved
Bit 3: T3_MODE (0: thermistor, 1: BJT [default])
Bit 2: T2_MODE (0: thermistor, 1: BJT [default])
Bit 1: T1_MODE (0: thermistor, 1: BJT [default])
Bit 0: reserved

Change-Id: I6af0d93061ec49aec7a9181cdf7affd60fbdca73
Signed-off-by: Renze Nicolai 
---
M src/superio/fintek/f71869ad/chip.h
M src/superio/fintek/f71869ad/f71869ad_hwm.c
2 files changed, 4 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/35/22935/1

diff --git a/src/superio/fintek/f71869ad/chip.h b/src/superio/fintek/f71869ad/chip.h
index 4e4323e..42d451d 100644
--- a/src/superio/fintek/f71869ad/chip.h
+++ b/src/superio/fintek/f71869ad/chip.h
@@ -37,6 +37,7 @@
    uint8_t hwm_fan1_seg2_speed_count;
    uint8_t hwm_fan1_seg3_speed_count;
    uint8_t hwm_fan1_temp_map_sel;
+	uint8_t hwm_temp_sensor_type;
 };

#endif /* SUPERIO_FINTEK_F71869AD_CHIP_H */
diff --git a/src/superio/fintek/f71869ad/f71869ad_hwm.c b/src/superio/fintek/f71869ad/f71869ad_hwm.c
index d253e5f..b0b1a6b 100644
--- a/src/superio/fintek/f71869ad/f71869ad_hwm.c
+++ b/src/superio/fintek/f71869ad/f71869ad_hwm.c
@@ -50,6 +50,7 @@
 #define HWM_FAN1_SEG2_SPEED_COUNT  0xAB
 #define HWM_FAN1_SEG3_SPEED_COUNT  0xAC
 #define HWM_FAN1_TEMP_MAP_SEL      0xAF
+#define HWM_TEMP_SENSOR_TYPE       0x6B

/* note: multifunc registers need to be tweaked before here */
 void f71869ad_hwm_init(struct device *dev)
@@ -97,6 +98,8 @@
    pnp_write_index(port, HWM_FAN1_SEG1_SPEED_COUNT, conf->hwm_fan1_seg1_speed_count);
    pnp_write_index(port, HWM_FAN1_SEG2_SPEED_COUNT, conf->hwm_fan1_seg2_speed_count);
    pnp_write_index(port, HWM_FAN1_SEG3_SPEED_COUNT, conf->hwm_fan1_seg3_speed_count);
+	/* Temperature sensor type */
+	pnp_write_index(port, HWM_TEMP_SENSOR_TYPE, conf->hwm_temp_sensor_type);

pnp_exit_conf_mode(dev);
 }