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authorYuantian Tang <andy.tang@nxp.com>2020-05-26 14:02:12 +0800
committerDaniel Lezcano <daniel.lezcano@linaro.org>2020-05-29 20:26:51 +0200
commit47fa116e5faec894f6238f87322c01dd41d21e23 (patch)
treed6f9714469190ebf456472480b8c6b9b011136d5
parentb03628b73564cf54e05b7611e22d9886a8822877 (diff)
thermal: qoriq: Update the settings for TMUv2
For TMU v2, TMSAR registers need to be set properly to get the accurate temperature values. Also the temperature read needs to be converted to degree Celsius since it is in degrees Kelvin. Signed-off-by: Yuantian Tang <andy.tang@nxp.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Link: https://lore.kernel.org/r/20200526060212.4118-1-andy.tang@nxp.com
-rw-r--r--drivers/thermal/qoriq_thermal.c26
1 files changed, 24 insertions, 2 deletions
diff --git a/drivers/thermal/qoriq_thermal.c b/drivers/thermal/qoriq_thermal.c
index 028a6bbf75dc..73049f9bea25 100644
--- a/drivers/thermal/qoriq_thermal.c
+++ b/drivers/thermal/qoriq_thermal.c
@@ -11,6 +11,7 @@
#include <linux/regmap.h>
#include <linux/sizes.h>
#include <linux/thermal.h>
+#include <linux/units.h>
#include "thermal_core.h"
#include "thermal_hwmon.h"
@@ -23,6 +24,7 @@
#define TMTMIR_DEFAULT 0x0000000f
#define TIER_DISABLE 0x0
#define TEUMR0_V2 0x51009c00
+#define TMSARA_V2 0xe
#define TMU_VER1 0x1
#define TMU_VER2 0x2
@@ -50,6 +52,9 @@
* Site Register
*/
#define TRITSR_V BIT(31)
+#define REGS_V2_TMSAR(n) (0x304 + 16 * (n)) /* TMU monitoring
+ * site adjustment register
+ */
#define REGS_TTRnCR(n) (0xf10 + 4 * (n)) /* Temperature Range n
* Control Register
*/
@@ -85,12 +90,21 @@ static int tmu_get_temp(void *p, int *temp)
/*
* REGS_TRITSR(id) has the following layout:
*
+ * For TMU Rev1:
* 31 ... 7 6 5 4 3 2 1 0
* V TEMP
*
* Where V bit signifies if the measurement is ready and is
* within sensor range. TEMP is an 8 bit value representing
- * temperature in C.
+ * temperature in Celsius.
+
+ * For TMU Rev2:
+ * 31 ... 8 7 6 5 4 3 2 1 0
+ * V TEMP
+ *
+ * Where V bit signifies if the measurement is ready and is
+ * within sensor range. TEMP is an 9 bit value representing
+ * temperature in KelVin.
*/
if (regmap_read_poll_timeout(qdata->regmap,
REGS_TRITSR(qsensor->id),
@@ -100,7 +114,10 @@ static int tmu_get_temp(void *p, int *temp)
10 * USEC_PER_MSEC))
return -ENODATA;
- *temp = (val & 0xff) * 1000;
+ if (qdata->ver == TMU_VER1)
+ *temp = (val & GENMASK(7, 0)) * MILLIDEGREE_PER_DEGREE;
+ else
+ *temp = kelvin_to_millicelsius(val & GENMASK(8, 0));
return 0;
}
@@ -192,6 +209,8 @@ static int qoriq_tmu_calibration(struct device *dev,
static void qoriq_tmu_init_device(struct qoriq_tmu_data *data)
{
+ int i;
+
/* Disable interrupt, using polling instead */
regmap_write(data->regmap, REGS_TIER, TIER_DISABLE);
@@ -202,6 +221,8 @@ static void qoriq_tmu_init_device(struct qoriq_tmu_data *data)
} else {
regmap_write(data->regmap, REGS_V2_TMTMIR, TMTMIR_DEFAULT);
regmap_write(data->regmap, REGS_V2_TEUMR(0), TEUMR0_V2);
+ for (i = 0; i < SITES_MAX; i++)
+ regmap_write(data->regmap, REGS_V2_TMSAR(i), TMSARA_V2);
}
/* Disable monitoring */
@@ -212,6 +233,7 @@ static const struct regmap_range qoriq_yes_ranges[] = {
regmap_reg_range(REGS_TMR, REGS_TSCFGR),
regmap_reg_range(REGS_TTRnCR(0), REGS_TTRnCR(3)),
regmap_reg_range(REGS_V2_TEUMR(0), REGS_V2_TEUMR(2)),
+ regmap_reg_range(REGS_V2_TMSAR(0), REGS_V2_TMSAR(15)),
regmap_reg_range(REGS_IPBRR(0), REGS_IPBRR(1)),
/* Read only registers below */
regmap_reg_range(REGS_TRITSR(0), REGS_TRITSR(15)),