1 files changed, 77 insertions, 0 deletions
diff --git a/drivers/thermal/qcom/tsens-v2.c b/drivers/thermal/qcom/tsens-v2.c
new file mode 100644
index 000000000000..44da02f594ac
--- /dev/null
+++ b/drivers/thermal/qcom/tsens-v2.c
@@ -0,0 +1,77 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2015, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2018, Linaro Limited
+ */
+
+#include <linux/regmap.h>
+#include <linux/bitops.h>
+#include "tsens.h"
+
+#define STATUS_OFFSET		0xa0
+#define LAST_TEMP_MASK		0xfff
+#define STATUS_VALID_BIT	BIT(21)
+
+static int get_temp_tsens_v2(struct tsens_device *tmdev, int id, int *temp)
+{
+	struct tsens_sensor *s = &tmdev->sensor[id];
+	u32 code;
+	unsigned int status_reg;
+	u32 last_temp = 0, last_temp2 = 0, last_temp3 = 0;
+	int ret;
+
+	status_reg = tmdev->tm_offset + STATUS_OFFSET + s->hw_id * 4;
+	ret = regmap_read(tmdev->map, status_reg, &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, status_reg, &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, status_reg, &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:
+	/* Convert temperature from deciCelsius to milliCelsius */
+	*temp = sign_extend32(last_temp, fls(LAST_TEMP_MASK) - 1) * 100;
+
+	return 0;
+}
+
+static const struct tsens_ops ops_generic_v2 = {
+	.init		= init_common,
+	.get_temp	= get_temp_tsens_v2,
+};
+
+const struct tsens_data data_tsens_v2 = {
+	.ops            = &ops_generic_v2,
+};
+
+/* Kept around for backward compatibility with old msm8996.dtsi */
+const struct tsens_data data_8996 = {
+	.num_sensors	= 13,
+	.ops		= &ops_generic_v2,
+};