[PATCH v6 06/12] thermal: tegra: add a debugfs to show registers

From: Wei Ni
Date: Mon Feb 22 2016 - 03:07:26 EST

Add a debugfs interface to show register contents for debug.

Signed-off-by: Wei Ni <wni@xxxxxxxxxx>
---
drivers/thermal/tegra/soctherm.c | 143 ++++++++++++++++++++++++++++++++++++++-
drivers/thermal/tegra/soctherm.h | 2 +
2 files changed, 142 insertions(+), 3 deletions(-)

diff --git a/drivers/thermal/tegra/soctherm.c b/drivers/thermal/tegra/soctherm.c
index 7c9e4ff10860..7dafbf316393 100644
--- a/drivers/thermal/tegra/soctherm.c
+++ b/drivers/thermal/tegra/soctherm.c
@@ -15,6 +15,7 @@
*
*/

+#include <linux/debugfs.h>
#include <linux/bitops.h>
#include <linux/clk.h>
#include <linux/delay.h>
@@ -33,14 +34,18 @@

#define SENSOR_CONFIG0 0
#define SENSOR_CONFIG0_STOP BIT(0)
-#define SENSOR_CONFIG0_TALL_SHIFT 8
-#define SENSOR_CONFIG0_TCALC_OVER BIT(4)
-#define SENSOR_CONFIG0_OVER BIT(3)
#define SENSOR_CONFIG0_CPTR_OVER BIT(2)
+#define SENSOR_CONFIG0_OVER BIT(3)
+#define SENSOR_CONFIG0_TCALC_OVER BIT(4)
+#define SENSOR_CONFIG0_TALL_MASK (0xfffff << 8)
+#define SENSOR_CONFIG0_TALL_SHIFT 8

#define SENSOR_CONFIG1 4
+#define SENSOR_CONFIG1_TSAMPLE_MASK 0x3ff
#define SENSOR_CONFIG1_TSAMPLE_SHIFT 0
+#define SENSOR_CONFIG1_TIDDQ_EN_MASK (0x3f << 15)
#define SENSOR_CONFIG1_TIDDQ_EN_SHIFT 15
+#define SENSOR_CONFIG1_TEN_COUNT_MASK (0x3f << 24)
#define SENSOR_CONFIG1_TEN_COUNT_SHIFT 24
#define SENSOR_CONFIG1_TEMP_ENABLE BIT(31)

@@ -49,6 +54,14 @@
* because, it will be used by tegra_soctherm_fuse.c
*/

+#define SENSOR_STATUS0 0xc
+#define SENSOR_STATUS0_VALID_MASK BIT(31)
+#define SENSOR_STATUS0_CAPTURE_MASK 0xffff
+
+#define SENSOR_STATUS1 0x10
+#define SENSOR_STATUS1_TEMP_VALID_MASK BIT(31)
+#define SENSOR_STATUS1_TEMP_MASK 0xffff
+
#define READBACK_VALUE_MASK 0xff00
#define READBACK_VALUE_SHIFT 8
#define READBACK_ADD_HALF BIT(7)
@@ -74,6 +87,8 @@ struct tegra_soctherm {
u32 *calib;
struct thermal_zone_device *thermctl_tzs[TEGRA124_SOCTHERM_SENSOR_NUM];
struct tegra_soctherm_soc *soc;
+
+ struct dentry *debugfs_dir;
};

static int enable_tsensor(struct tegra_soctherm *tegra,
@@ -141,6 +156,124 @@ static const struct thermal_zone_of_device_ops tegra_of_thermal_ops = {
.get_temp = tegra_thermctl_get_temp,
};

+#ifdef CONFIG_DEBUG_FS
+static int regs_show(struct seq_file *s, void *data)
+{
+ struct platform_device *pdev = s->private;
+ struct tegra_soctherm *ts = platform_get_drvdata(pdev);
+ const struct tegra_tsensor *tsensors = ts->soc->tsensors;
+ u32 r, state;
+ int i;
+
+ seq_puts(s, "-----TSENSE (convert HW)-----\n");
+
+ for (i = 0; i < ts->soc->num_tsensors; i++) {
+ r = readl(ts->regs + tsensors[i].base + SENSOR_CONFIG1);
+ state = REG_GET_MASK(r, SENSOR_CONFIG1_TEMP_ENABLE);
+ if (!state)
+ continue;
+
+ seq_printf(s, "%s: ", tsensors[i].name);
+
+ seq_printf(s, "En(%d) ", state);
+ state = REG_GET_MASK(r, SENSOR_CONFIG1_TIDDQ_EN_MASK);
+ seq_printf(s, "tiddq(%d) ", state);
+ state = REG_GET_MASK(r, SENSOR_CONFIG1_TEN_COUNT_MASK);
+ seq_printf(s, "ten_count(%d) ", state);
+ state = REG_GET_MASK(r, SENSOR_CONFIG1_TSAMPLE_MASK);
+ seq_printf(s, "tsample(%d) ", state + 1);
+
+ r = readl(ts->regs + tsensors[i].base + SENSOR_STATUS1);
+ state = REG_GET_MASK(r, SENSOR_STATUS1_TEMP_VALID_MASK);
+ seq_printf(s, "Temp(%d/", state);
+ state = REG_GET_MASK(r, SENSOR_STATUS1_TEMP_MASK);
+ seq_printf(s, "%d) ", translate_temp(state));
+
+ r = readl(ts->regs + tsensors[i].base + SENSOR_STATUS0);
+ state = REG_GET_MASK(r, SENSOR_STATUS0_VALID_MASK);
+ seq_printf(s, "Capture(%d/", state);
+ state = REG_GET_MASK(r, SENSOR_STATUS0_CAPTURE_MASK);
+ seq_printf(s, "%d) ", state);
+
+ r = readl(ts->regs + tsensors[i].base + SENSOR_CONFIG0);
+ state = REG_GET_MASK(r, SENSOR_CONFIG0_STOP);
+ seq_printf(s, "Stop(%d) ", state);
+ state = REG_GET_MASK(r, SENSOR_CONFIG0_TALL_MASK);
+ seq_printf(s, "Tall(%d) ", state);
+ state = REG_GET_MASK(r, SENSOR_CONFIG0_TCALC_OVER);
+ seq_printf(s, "Over(%d/", state);
+ state = REG_GET_MASK(r, SENSOR_CONFIG0_OVER);
+ seq_printf(s, "%d/", state);
+ state = REG_GET_MASK(r, SENSOR_CONFIG0_CPTR_OVER);
+ seq_printf(s, "%d) ", state);
+
+ r = readl(ts->regs + tsensors[i].base + SENSOR_CONFIG2);
+ state = REG_GET_MASK(r, SENSOR_CONFIG2_THERMA_MASK);
+ seq_printf(s, "Therm_A/B(%d/", state);
+ state = REG_GET_MASK(r, SENSOR_CONFIG2_THERMB_MASK);
+ seq_printf(s, "%d)\n", (s16)state);
+ }
+
+ r = readl(ts->regs + SENSOR_PDIV);
+ seq_printf(s, "PDIV: 0x%x\n", r);
+
+ r = readl(ts->regs + SENSOR_HOTSPOT_OFF);
+ seq_printf(s, "HOTSPOT: 0x%x\n", r);
+
+ seq_puts(s, "\n");
+ seq_puts(s, "-----SOC_THERM-----\n");
+
+ r = readl(ts->regs + SENSOR_TEMP1);
+ state = REG_GET_MASK(r, SENSOR_TEMP1_CPU_TEMP_MASK);
+ seq_printf(s, "Temperatures: CPU(%d) ", translate_temp(state));
+ state = REG_GET_MASK(r, SENSOR_TEMP1_GPU_TEMP_MASK);
+ seq_printf(s, " GPU(%d) ", translate_temp(state));
+ r = readl(ts->regs + SENSOR_TEMP2);
+ state = REG_GET_MASK(r, SENSOR_TEMP2_PLLX_TEMP_MASK);
+ seq_printf(s, " PLLX(%d) ", translate_temp(state));
+ state = REG_GET_MASK(r, SENSOR_TEMP2_MEM_TEMP_MASK);
+ seq_printf(s, " MEM(%d)\n", translate_temp(state));
+
+ return 0;
+}
+
+static int regs_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, regs_show, inode->i_private);
+}
+
+static const struct file_operations regs_fops = {
+ .open = regs_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static void soctherm_debug_init(struct platform_device *pdev)
+{
+ struct tegra_soctherm *tegra = platform_get_drvdata(pdev);
+ struct dentry *root, *file;
+
+ root = debugfs_create_dir("soctherm", NULL);
+ if (!root) {
+ dev_err(&pdev->dev, "failed to create debugfs directory\n");
+ return;
+ }
+
+ tegra->debugfs_dir = root;
+
+ file = debugfs_create_file("reg_contents", 0644, root,
+ pdev, &regs_fops);
+ if (!file)
+ dev_err(&pdev->dev, "failed to create debugfs file\n");
+}
+#else
+static inline void soctherm_debug_init(struct platform_device *pdev)
+{
+ return 0;
+}
+#endif
+
static const struct of_device_id tegra_soctherm_of_match[] = {
#ifdef CONFIG_ARCH_TEGRA_124_SOC
{
@@ -282,6 +415,8 @@ static int tegra_soctherm_probe(struct platform_device *pdev)
tegra->thermctl_tzs[soc->ttgs[i]->id] = tz;
}

+ soctherm_debug_init(pdev);
+
return 0;

unregister_tzs:
@@ -301,6 +436,8 @@ static int tegra_soctherm_remove(struct platform_device *pdev)
struct tegra_soctherm *tegra = platform_get_drvdata(pdev);
unsigned int i;

+ debugfs_remove_recursive(tegra->debugfs_dir);
+
for (i = 0; i < ARRAY_SIZE(tegra->thermctl_tzs); ++i) {
thermal_zone_of_sensor_unregister(&pdev->dev,
tegra->thermctl_tzs[i]);
diff --git a/drivers/thermal/tegra/soctherm.h b/drivers/thermal/tegra/soctherm.h
index 69d317269af1..ec4b87616d01 100644
--- a/drivers/thermal/tegra/soctherm.h
+++ b/drivers/thermal/tegra/soctherm.h
@@ -16,7 +16,9 @@
#define __DRIVERS_THERMAL_TEGRA_SOCTHERM_H

#define SENSOR_CONFIG2 8
+#define SENSOR_CONFIG2_THERMA_MASK (0xffff << 16)
#define SENSOR_CONFIG2_THERMA_SHIFT 16
+#define SENSOR_CONFIG2_THERMB_MASK 0xffff
#define SENSOR_CONFIG2_THERMB_SHIFT 0

#define SENSOR_PDIV 0x1c0
--
1.9.1