[PATCH v2 3/5] thermal: tsens: Move 8996 get_temp() to common code for reuse

Amit Kucheria
2018-06-12T10:55:46Z

The TSENS block inside the 8996 is internally classified as version 2.
Several other SoC families use this block and can share this code. Rename
get_temp() to reflect that it can be used across the v2 family.

Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org>
---
drivers/thermal/qcom/tsens-8996.c | 73 ++-----------------------------------
drivers/thermal/qcom/tsens-common.c | 69 ++++++++++++++++++++++++++++++-----
drivers/thermal/qcom/tsens.h | 1 +
3 files changed, 63 insertions(+), 80 deletions(-)

diff --git a/drivers/thermal/qcom/tsens-8996.c b/drivers/thermal/qcom/tsens-8996.c
index 6e59078..a0d9096 100644
--- a/drivers/thermal/qcom/tsens-8996.c
+++ b/drivers/thermal/qcom/tsens-8996.c
@@ -1,81 +1,14 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2015, The Linux Foundation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 and
- * only version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
+ * Copyright (c) 2018, Linaro Limited
*/

-#include <linux/platform_device.h>
-#include <linux/regmap.h>
#include "tsens.h"

-#define STATUS_OFFSET 0x10a0
-#define LAST_TEMP_MASK 0xfff
-#define STATUS_VALID_BIT BIT(21)
-#define CODE_SIGN_BIT BIT(11)
-
-static int get_temp_8996(struct tsens_device *tmdev, int id, int *temp)
-{
- struct tsens_sensor *s = &tmdev->sensor[id];
- u32 code;
- unsigned int sensor_addr;
- int last_temp = 0, last_temp2 = 0, last_temp3 = 0, ret;
-
- sensor_addr = STATUS_OFFSET + s->hw_id * 4;
- ret = regmap_read(tmdev->map, sensor_addr, &code);
- if (ret)
- return ret;
- last_temp = code & LAST_TEMP_MASK;
- if (code & STATUS_VALID_BIT)
- goto done;
-
- /* Try a second time */
- ret = regmap_read(tmdev->map, sensor_addr, &code);
- if (ret)
- return ret;
- if (code & STATUS_VALID_BIT) {
- last_temp = code & LAST_TEMP_MASK;
- goto done;
- } else {
- last_temp2 = code & LAST_TEMP_MASK;
- }
-
- /* Try a third/last time */
- ret = regmap_read(tmdev->map, sensor_addr, &code);
- if (ret)
- return ret;
- if (code & STATUS_VALID_BIT) {
- last_temp = code & LAST_TEMP_MASK;
- goto done;
- } else {
- last_temp3 = code & LAST_TEMP_MASK;
- }
-
- if (last_temp == last_temp2)
- last_temp = last_temp2;
- else if (last_temp2 == last_temp3)
- last_temp = last_temp3;
-done:
- /* Code sign bit is the sign extension for a negative value */
- if (last_temp & CODE_SIGN_BIT)
- last_temp |= ~CODE_SIGN_BIT;
-
- /* Temperatures are in deciCelicius */
- *temp = last_temp * 100;
-
- return 0;
-}
-
static const struct tsens_ops ops_8996 = {
.init = init_common,
- .get_temp = get_temp_8996,
+ .get_temp = get_temp_tsens_v2,
};

const struct tsens_data data_8996 = {
diff --git a/drivers/thermal/qcom/tsens-common.c b/drivers/thermal/qcom/tsens-common.c
index b1449ad..961ace4 100644
--- a/drivers/thermal/qcom/tsens-common.c
+++ b/drivers/thermal/qcom/tsens-common.c
@@ -1,15 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2015, The Linux Foundation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 and
- * only version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
+ * Copyright (c) 2018, Linaro Limited
*/

#include <linux/err.h>
@@ -117,6 +109,63 @@ int get_temp_common(struct tsens_device *tmdev, int id, int *temp)
return 0;
}

+#define STATUS_OFFSET 0xa0
+#define LAST_TEMP_MASK 0xfff
+#define STATUS_VALID_BIT BIT(21)
+#define CODE_SIGN_BIT BIT(11)
+
+int get_temp_tsens_v2(struct tsens_device *tmdev, int id, int *temp)
+{
+ struct tsens_sensor *s = &tmdev->sensor[id];
+ u32 code;
+ unsigned int sensor_addr;
+ int last_temp = 0, last_temp2 = 0, last_temp3 = 0, ret;
+
+ sensor_addr = STATUS_OFFSET + s->hw_id * 4;
+ ret = regmap_read(tmdev->map, sensor_addr, &code);
+ if (ret)
+ return ret;
+ last_temp = code & LAST_TEMP_MASK;
+ if (code & STATUS_VALID_BIT)
+ goto done;
+
+ /* Try a second time */
+ ret = regmap_read(tmdev->map, sensor_addr, &code);
+ if (ret)
+ return ret;
+ if (code & STATUS_VALID_BIT) {
+ last_temp = code & LAST_TEMP_MASK;
+ goto done;
+ } else {
+ last_temp2 = code & LAST_TEMP_MASK;
+ }
+
+ /* Try a third/last time */
+ ret = regmap_read(tmdev->map, sensor_addr, &code);
+ if (ret)
+ return ret;
+ if (code & STATUS_VALID_BIT) {
+ last_temp = code & LAST_TEMP_MASK;
+ goto done;
+ } else {
+ last_temp3 = code & LAST_TEMP_MASK;
+ }
+
+ if (last_temp == last_temp2)
+ last_temp = last_temp2;
+ else if (last_temp2 == last_temp3)
+ last_temp = last_temp3;
+done:
+ /* Code sign bit is the sign extension for a negative value */
+ if (last_temp & CODE_SIGN_BIT)
+ last_temp |= ~CODE_SIGN_BIT;
+
+ /* Temperatures are in deciCelicius */
+ *temp = last_temp * 100;
+
+ return 0;
+}
+
static const struct regmap_config tsens_config = {
.reg_bits = 32,
.val_bits = 32,
diff --git a/drivers/thermal/qcom/tsens.h b/drivers/thermal/qcom/tsens.h
index dc56e1e..80b273d 100644
--- a/drivers/thermal/qcom/tsens.h
+++ b/drivers/thermal/qcom/tsens.h
@@ -86,6 +86,7 @@ char *qfprom_read(struct device *, const char *);
void compute_intercept_slope(struct tsens_device *, u32 *, u32 *, u32);
int init_common(struct tsens_device *);
int get_temp_common(struct tsens_device *, int, int *);
+int get_temp_tsens_v2(struct tsens_device *, int, int *);

extern const struct tsens_data data_8916, data_8974, data_8960, data_8996;

--
2.7.4