From: Amit Kucheria <amit.kucheria@linaro.org>
To: linux-arm-msm@vger.kernel.org
Cc: rnayak@codeaurora.org, bjorn.andersson@linaro.org,
edubezval@gmail.com, Zhang Rui <rui.zhang@intel.com>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
linux-pm@vger.kernel.org (open list:THERMAL),
devicetree@vger.kernel.org (open list:OPEN FIRMWARE AND
FLATTENED DEVICE TREE BINDINGS),
linux-kernel@vger.kernel.org (open list)
Subject: [PATCH 1/2] thermal: tsens: Add support for SDM845 platform
Date: Sat, 2 Jun 2018 14:11:12 +0300 [thread overview]
Message-ID: <7a0f33cff94f41110bdbff14d28d36074fae2a7d.1527937396.git.amit.kucheria@linaro.org> (raw)
In-Reply-To: <cover.1527937396.git.amit.kucheria@linaro.org>
In-Reply-To: <cover.1527937396.git.amit.kucheria@linaro.org>
There are two tsens blocks on the SDM845. These will be configured through
the devicetree.
Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org>
---
.../devicetree/bindings/thermal/qcom-tsens.txt | 1 +
drivers/thermal/qcom/Makefile | 2 +-
drivers/thermal/qcom/tsens-sdm845.c | 98 ++++++++++++++++++++++
drivers/thermal/qcom/tsens.c | 3 +
drivers/thermal/qcom/tsens.h | 1 +
5 files changed, 104 insertions(+), 1 deletion(-)
create mode 100644 drivers/thermal/qcom/tsens-sdm845.c
diff --git a/Documentation/devicetree/bindings/thermal/qcom-tsens.txt b/Documentation/devicetree/bindings/thermal/qcom-tsens.txt
index 292ed89..8652499 100644
--- a/Documentation/devicetree/bindings/thermal/qcom-tsens.txt
+++ b/Documentation/devicetree/bindings/thermal/qcom-tsens.txt
@@ -5,6 +5,7 @@ Required properties:
- "qcom,msm8916-tsens" : For 8916 Family of SoCs
- "qcom,msm8974-tsens" : For 8974 Family of SoCs
- "qcom,msm8996-tsens" : For 8996 Family of SoCs
+ - "qcom,sdm845-tsens" : For SDM845 Family of SoCs
- reg: Address range of the thermal registers
- #thermal-sensor-cells : Should be 1. See ./thermal.txt for a description.
diff --git a/drivers/thermal/qcom/Makefile b/drivers/thermal/qcom/Makefile
index 2cc2193..dc9f169 100644
--- a/drivers/thermal/qcom/Makefile
+++ b/drivers/thermal/qcom/Makefile
@@ -1,2 +1,2 @@
obj-$(CONFIG_QCOM_TSENS) += qcom_tsens.o
-qcom_tsens-y += tsens.o tsens-common.o tsens-8916.o tsens-8974.o tsens-8960.o tsens-8996.o
+qcom_tsens-y += tsens.o tsens-common.o tsens-8916.o tsens-8974.o tsens-8960.o tsens-8996.o tsens-sdm845.o
diff --git a/drivers/thermal/qcom/tsens-sdm845.c b/drivers/thermal/qcom/tsens-sdm845.c
new file mode 100644
index 0000000..5d78f0b
--- /dev/null
+++ b/drivers/thermal/qcom/tsens-sdm845.c
@@ -0,0 +1,98 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018, Linaro Limited
+ */
+
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include "tsens.h"
+
+#define CNTL_OFFSET 4
+/* CNTL_OFFSET bitmasks */
+#define EN BIT(0)
+#define SW_RST BIT(1)
+
+#define SENSOR0_SHIFT 3
+
+#define TRDY_OFFSET 0xe4
+#define TRDY_READY_BIT BIT(1)
+
+#define STATUS_OFFSET 0xa0
+#define LAST_TEMP_MASK 0xfff
+#define STATUS_VALID_BIT BIT(21)
+#define CODE_SIGN_BIT BIT(11)
+
+static int get_temp_sdm845(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;
+
+ ret = regmap_read(tmdev->map, TRDY_OFFSET, &code);
+ if (ret)
+ return ret;
+ if (code & TRDY_READY_BIT)
+ return -ENODATA;
+
+ 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,
+ .reg_stride = 4,
+};
+
+
+static const struct tsens_ops ops_sdm845 = {
+ .init = init_common,
+ .get_temp = get_temp_sdm845,
+};
+
+const struct tsens_data data_sdm845 = {
+ .ops = &ops_sdm845,
+};
diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c
index 3f9fe6a..314a20f 100644
--- a/drivers/thermal/qcom/tsens.c
+++ b/drivers/thermal/qcom/tsens.c
@@ -72,6 +72,9 @@ static const struct of_device_id tsens_table[] = {
}, {
.compatible = "qcom,msm8996-tsens",
.data = &data_8996,
+ }, {
+ .compatible = "qcom,sdm845-tsens",
+ .data = &data_sdm845,
},
{}
};
diff --git a/drivers/thermal/qcom/tsens.h b/drivers/thermal/qcom/tsens.h
index 911c197..f15660d 100644
--- a/drivers/thermal/qcom/tsens.h
+++ b/drivers/thermal/qcom/tsens.h
@@ -90,5 +90,6 @@ int init_common(struct tsens_device *);
int get_temp_common(struct tsens_device *, int, int *);
extern const struct tsens_data data_8916, data_8974, data_8960, data_8996;
+extern const struct tsens_data data_sdm845;
#endif /* __QCOM_TSENS_H__ */
--
2.7.4
next prev parent reply other threads:[~2018-06-02 11:11 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-02 11:11 [PATCH 0/2] thermal: tsens: SDM845 support Amit Kucheria
2018-06-02 11:11 ` Amit Kucheria [this message]
2018-06-04 4:25 ` [PATCH 1/2] thermal: tsens: Add support for SDM845 platform Rajendra Nayak
2018-06-04 15:03 ` Bjorn Andersson
2018-06-12 10:39 ` Amit Kucheria
2018-06-02 11:11 ` [PATCH 2/2] tsens: Get rid of unused fields in structure Amit Kucheria
2018-06-04 4:26 ` Rajendra Nayak
2018-06-04 15:05 ` Bjorn Andersson
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