aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/thermal
diff options
context:
space:
mode:
authorZhang Rui <rui.zhang@intel.com>2017-11-02 16:31:52 +0800
committerZhang Rui <rui.zhang@intel.com>2017-11-02 16:31:52 +0800
commitfe9ba5bc73af01f7d53bb6b2b31204f799dd09be (patch)
treead68935d28d4616eefdefb95b4e10d3d85f11b29 /drivers/thermal
parentb2fd708ffa7f43ce8680271924e1771e26a3ec91 (diff)
parent531fcdeb71f0be1d4c77838b1a4694c317b1eb98 (diff)
Merge branch 'imx-nvmem' into thermal-soc
Diffstat (limited to 'drivers/thermal')
-rw-r--r--drivers/thermal/Kconfig1
-rw-r--r--drivers/thermal/imx_thermal.c104
2 files changed, 75 insertions, 30 deletions
diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
index c70f6bfd9e85..315ae2926e20 100644
--- a/drivers/thermal/Kconfig
+++ b/drivers/thermal/Kconfig
@@ -206,6 +206,7 @@ config HISI_THERMAL
config IMX_THERMAL
tristate "Temperature sensor driver for Freescale i.MX SoCs"
depends on (ARCH_MXC && CPU_THERMAL) || COMPILE_TEST
+ depends on NVMEM || !NVMEM
depends on MFD_SYSCON
depends on OF
help
diff --git a/drivers/thermal/imx_thermal.c b/drivers/thermal/imx_thermal.c
index 4798b4b1fd77..e7d4ffc3de7f 100644
--- a/drivers/thermal/imx_thermal.c
+++ b/drivers/thermal/imx_thermal.c
@@ -25,6 +25,7 @@
#include <linux/slab.h>
#include <linux/thermal.h>
#include <linux/types.h>
+#include <linux/nvmem-consumer.h>
#define REG_SET 0x4
#define REG_CLR 0x8
@@ -94,7 +95,7 @@ struct imx_thermal_data {
struct thermal_cooling_device *cdev;
enum thermal_device_mode mode;
struct regmap *tempmon;
- u32 c1, c2; /* See formula in imx_get_sensor_data() */
+ u32 c1, c2; /* See formula in imx_init_calib() */
int temp_passive;
int temp_critical;
int temp_max;
@@ -177,7 +178,7 @@ static int imx_get_temp(struct thermal_zone_device *tz, int *temp)
n_meas = (val & TEMPSENSE0_TEMP_CNT_MASK) >> TEMPSENSE0_TEMP_CNT_SHIFT;
- /* See imx_get_sensor_data() for formula derivation */
+ /* See imx_init_calib() for formula derivation */
*temp = data->c2 - n_meas * data->c1;
/* Update alarm value to next higher trip point for TEMPMON_IMX6Q */
@@ -346,29 +347,12 @@ static struct thermal_zone_device_ops imx_tz_ops = {
.set_trip_temp = imx_set_trip_temp,
};
-static int imx_get_sensor_data(struct platform_device *pdev)
+static int imx_init_calib(struct platform_device *pdev, u32 val)
{
struct imx_thermal_data *data = platform_get_drvdata(pdev);
- struct regmap *map;
int t1, n1;
- int ret;
- u32 val;
u64 temp64;
- map = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
- "fsl,tempmon-data");
- if (IS_ERR(map)) {
- ret = PTR_ERR(map);
- dev_err(&pdev->dev, "failed to get sensor regmap: %d\n", ret);
- return ret;
- }
-
- ret = regmap_read(map, OCOTP_ANA1, &val);
- if (ret) {
- dev_err(&pdev->dev, "failed to read sensor data: %d\n", ret);
- return ret;
- }
-
if (val == 0 || val == ~0) {
dev_err(&pdev->dev, "invalid sensor calibration data\n");
return -EINVAL;
@@ -405,12 +389,12 @@ static int imx_get_sensor_data(struct platform_device *pdev)
data->c1 = temp64;
data->c2 = n1 * data->c1 + 1000 * t1;
- /* use OTP for thermal grade */
- ret = regmap_read(map, OCOTP_MEM0, &val);
- if (ret) {
- dev_err(&pdev->dev, "failed to read temp grade: %d\n", ret);
- return ret;
- }
+ return 0;
+}
+
+static void imx_init_temp_grade(struct platform_device *pdev, u32 val)
+{
+ struct imx_thermal_data *data = platform_get_drvdata(pdev);
/* The maximum die temp is specified by the Temperature Grade */
switch ((val >> 6) & 0x3) {
@@ -438,6 +422,55 @@ static int imx_get_sensor_data(struct platform_device *pdev)
*/
data->temp_critical = data->temp_max - (1000 * 5);
data->temp_passive = data->temp_max - (1000 * 10);
+}
+
+static int imx_init_from_tempmon_data(struct platform_device *pdev)
+{
+ struct regmap *map;
+ int ret;
+ u32 val;
+
+ map = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
+ "fsl,tempmon-data");
+ if (IS_ERR(map)) {
+ ret = PTR_ERR(map);
+ dev_err(&pdev->dev, "failed to get sensor regmap: %d\n", ret);
+ return ret;
+ }
+
+ ret = regmap_read(map, OCOTP_ANA1, &val);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to read sensor data: %d\n", ret);
+ return ret;
+ }
+ ret = imx_init_calib(pdev, val);
+ if (ret)
+ return ret;
+
+ ret = regmap_read(map, OCOTP_MEM0, &val);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to read sensor data: %d\n", ret);
+ return ret;
+ }
+ imx_init_temp_grade(pdev, val);
+
+ return 0;
+}
+
+static int imx_init_from_nvmem_cells(struct platform_device *pdev)
+{
+ int ret;
+ u32 val;
+
+ ret = nvmem_cell_read_u32(&pdev->dev, "calib", &val);
+ if (ret)
+ return ret;
+ imx_init_calib(pdev, val);
+
+ ret = nvmem_cell_read_u32(&pdev->dev, "temp_grade", &val);
+ if (ret)
+ return ret;
+ imx_init_temp_grade(pdev, val);
return 0;
}
@@ -514,10 +547,21 @@ static int imx_thermal_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, data);
- ret = imx_get_sensor_data(pdev);
- if (ret) {
- dev_err(&pdev->dev, "failed to get sensor data\n");
- return ret;
+ if (of_find_property(pdev->dev.of_node, "nvmem-cells", NULL)) {
+ ret = imx_init_from_nvmem_cells(pdev);
+ if (ret == -EPROBE_DEFER)
+ return ret;
+ if (ret) {
+ dev_err(&pdev->dev, "failed to init from nvmem: %d\n",
+ ret);
+ return ret;
+ }
+ } else {
+ ret = imx_init_from_tempmon_data(pdev);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to init from from fsl,tempmon-data\n");
+ return ret;
+ }
}
/* Make sure sensor is in known good state for measurements */

Privacy Policy