fef6a96d9e
Allows to check cpu temperature. Huge thanks to @hnyman for valuable assistance! Signed-off-by: Pavel Kubelun <be.dissent@gmail.com>
165 lines
5.1 KiB
Diff
165 lines
5.1 KiB
Diff
From 840a5bd3ed3fdd62456d4d26c3128ec10496555b Mon Sep 17 00:00:00 2001
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From: Rajendra Nayak <rnayak@codeaurora.org>
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Date: Thu, 5 May 2016 14:21:40 +0530
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Subject: thermal: qcom: tsens-8916: Add support for 8916 family of SoCs
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Add support to calibrate sensors on 8916 family and also add common
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functions to read temperature from sensors (This can be reused on
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other SoCs having similar TSENS device)
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The calibration data is read from eeprom using the generic nvmem
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framework apis.
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Based on the original code by Siddartha Mohanadoss and Stephen Boyd.
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Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
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Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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Signed-off-by: Zhang Rui <rui.zhang@intel.com>
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---
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drivers/thermal/qcom/Makefile | 2 +-
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drivers/thermal/qcom/tsens-8916.c | 113 ++++++++++++++++++++++++++++++++++++++
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drivers/thermal/qcom/tsens.c | 1 +
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drivers/thermal/qcom/tsens.h | 2 +
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4 files changed, 117 insertions(+), 1 deletion(-)
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create mode 100644 drivers/thermal/qcom/tsens-8916.c
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--- a/drivers/thermal/qcom/Makefile
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+++ b/drivers/thermal/qcom/Makefile
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@@ -1,2 +1,2 @@
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obj-$(CONFIG_QCOM_TSENS) += qcom_tsens.o
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-qcom_tsens-y += tsens.o tsens-common.o
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+qcom_tsens-y += tsens.o tsens-common.o tsens-8916.o
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--- /dev/null
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+++ b/drivers/thermal/qcom/tsens-8916.c
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@@ -0,0 +1,113 @@
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+/*
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+ * Copyright (c) 2015, The Linux Foundation. All rights reserved.
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License version 2 and
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+ * only version 2 as published by the Free Software Foundation.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ */
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+
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+#include <linux/platform_device.h>
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+#include "tsens.h"
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+
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+/* eeprom layout data for 8916 */
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+#define BASE0_MASK 0x0000007f
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+#define BASE1_MASK 0xfe000000
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+#define BASE0_SHIFT 0
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+#define BASE1_SHIFT 25
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+
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+#define S0_P1_MASK 0x00000f80
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+#define S1_P1_MASK 0x003e0000
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+#define S2_P1_MASK 0xf8000000
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+#define S3_P1_MASK 0x000003e0
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+#define S4_P1_MASK 0x000f8000
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+
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+#define S0_P2_MASK 0x0001f000
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+#define S1_P2_MASK 0x07c00000
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+#define S2_P2_MASK 0x0000001f
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+#define S3_P2_MASK 0x00007c00
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+#define S4_P2_MASK 0x01f00000
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+
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+#define S0_P1_SHIFT 7
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+#define S1_P1_SHIFT 17
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+#define S2_P1_SHIFT 27
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+#define S3_P1_SHIFT 5
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+#define S4_P1_SHIFT 15
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+
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+#define S0_P2_SHIFT 12
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+#define S1_P2_SHIFT 22
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+#define S2_P2_SHIFT 0
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+#define S3_P2_SHIFT 10
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+#define S4_P2_SHIFT 20
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+
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+#define CAL_SEL_MASK 0xe0000000
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+#define CAL_SEL_SHIFT 29
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+
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+static int calibrate_8916(struct tsens_device *tmdev)
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+{
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+ int base0 = 0, base1 = 0, i;
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+ u32 p1[5], p2[5];
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+ int mode = 0;
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+ u32 *qfprom_cdata, *qfprom_csel;
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+
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+ qfprom_cdata = (u32 *)qfprom_read(tmdev->dev, "calib");
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+ if (IS_ERR(qfprom_cdata))
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+ return PTR_ERR(qfprom_cdata);
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+
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+ qfprom_csel = (u32 *)qfprom_read(tmdev->dev, "calib_sel");
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+ if (IS_ERR(qfprom_csel))
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+ return PTR_ERR(qfprom_csel);
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+
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+ mode = (qfprom_csel[0] & CAL_SEL_MASK) >> CAL_SEL_SHIFT;
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+ dev_dbg(tmdev->dev, "calibration mode is %d\n", mode);
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+
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+ switch (mode) {
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+ case TWO_PT_CALIB:
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+ base1 = (qfprom_cdata[1] & BASE1_MASK) >> BASE1_SHIFT;
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+ p2[0] = (qfprom_cdata[0] & S0_P2_MASK) >> S0_P2_SHIFT;
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+ p2[1] = (qfprom_cdata[0] & S1_P2_MASK) >> S1_P2_SHIFT;
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+ p2[2] = (qfprom_cdata[1] & S2_P2_MASK) >> S2_P2_SHIFT;
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+ p2[3] = (qfprom_cdata[1] & S3_P2_MASK) >> S3_P2_SHIFT;
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+ p2[4] = (qfprom_cdata[1] & S4_P2_MASK) >> S4_P2_SHIFT;
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+ for (i = 0; i < tmdev->num_sensors; i++)
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+ p2[i] = ((base1 + p2[i]) << 3);
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+ /* Fall through */
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+ case ONE_PT_CALIB2:
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+ base0 = (qfprom_cdata[0] & BASE0_MASK);
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+ p1[0] = (qfprom_cdata[0] & S0_P1_MASK) >> S0_P1_SHIFT;
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+ p1[1] = (qfprom_cdata[0] & S1_P1_MASK) >> S1_P1_SHIFT;
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+ p1[2] = (qfprom_cdata[0] & S2_P1_MASK) >> S2_P1_SHIFT;
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+ p1[3] = (qfprom_cdata[1] & S3_P1_MASK) >> S3_P1_SHIFT;
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+ p1[4] = (qfprom_cdata[1] & S4_P1_MASK) >> S4_P1_SHIFT;
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+ for (i = 0; i < tmdev->num_sensors; i++)
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+ p1[i] = (((base0) + p1[i]) << 3);
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+ break;
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+ default:
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+ for (i = 0; i < tmdev->num_sensors; i++) {
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+ p1[i] = 500;
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+ p2[i] = 780;
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+ }
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+ break;
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+ }
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+
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+ compute_intercept_slope(tmdev, p1, p2, mode);
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+
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+ return 0;
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+}
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+
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+const struct tsens_ops ops_8916 = {
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+ .init = init_common,
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+ .calibrate = calibrate_8916,
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+ .get_temp = get_temp_common,
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+};
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+
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+const struct tsens_data data_8916 = {
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+ .num_sensors = 5,
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+ .ops = &ops_8916,
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+ .hw_ids = (unsigned int []){0, 1, 2, 4, 5 },
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+};
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--- a/drivers/thermal/qcom/tsens.c
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+++ b/drivers/thermal/qcom/tsens.c
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@@ -65,6 +65,7 @@ static SIMPLE_DEV_PM_OPS(tsens_pm_ops, t
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static const struct of_device_id tsens_table[] = {
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{
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.compatible = "qcom,msm8916-tsens",
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+ .data = &data_8916,
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}, {
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.compatible = "qcom,msm8974-tsens",
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},
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--- a/drivers/thermal/qcom/tsens.h
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+++ b/drivers/thermal/qcom/tsens.h
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@@ -87,4 +87,6 @@ void compute_intercept_slope(struct tsen
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int init_common(struct tsens_device *);
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int get_temp_common(struct tsens_device *, int, int *);
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+extern const struct tsens_data data_8916;
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+
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#endif /* __QCOM_TSENS_H__ */
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