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authorThara Gopinath <thara@ti.com>2010-10-27 20:29:37 +0530
committerKevin Hilman <khilman@deeprootsystems.com>2010-12-22 14:31:42 -0800
commit077fceca3a5db69791d64723ffba1caad2f03a08 (patch)
treef81edc23062a8573fd744eb6d7c4b5d396501911 /arch/arm/mach-omap2/smartreflex.c
parentfbc319f67660ede23cc22f3af5df559693f8062e (diff)
OMAP3: PM: Adding debug support to Voltage and Smartreflex drivers
This patch adds debug support to the voltage and smartreflex drivers. This means a whole bunch of voltage processor and smartreflex parameters are now visible through the pm debugfs. The voltage parameters can be viewed at /debug/voltage/vdd_<x>/<parameter> and the smartreflex parameters can be viewed at /debug/voltage/vdd_<x>/smartreflex/<parameter> Also smartreflex n-target values are now exposed out at /debug/voltage/vdd_<x>/smartreflex/nvalue/<voltage> This is a read-write interface which means user has the flexibility to change the n-target values for any opp. Signed-off-by: Thara Gopinath <thara@ti.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Diffstat (limited to 'arch/arm/mach-omap2/smartreflex.c')
-rw-r--r--arch/arm/mach-omap2/smartreflex.c46
1 files changed, 44 insertions, 2 deletions
diff --git a/arch/arm/mach-omap2/smartreflex.c b/arch/arm/mach-omap2/smartreflex.c
index eee23d0f50d..52a05b336c0 100644
--- a/arch/arm/mach-omap2/smartreflex.c
+++ b/arch/arm/mach-omap2/smartreflex.c
@@ -31,6 +31,7 @@
#include "pm.h"
#define SMARTREFLEX_NAME_LEN 16
+#define NVALUE_NAME_LEN 40
#define SR_DISABLE_TIMEOUT 200
struct omap_sr {
@@ -817,8 +818,9 @@ static int __init omap_sr_probe(struct platform_device *pdev)
struct omap_sr *sr_info = kzalloc(sizeof(struct omap_sr), GFP_KERNEL);
struct omap_sr_data *pdata = pdev->dev.platform_data;
struct resource *mem, *irq;
- struct dentry *vdd_dbg_dir, *dbg_dir;
- int ret = 0;
+ struct dentry *vdd_dbg_dir, *dbg_dir, *nvalue_dir;
+ struct omap_volt_data *volt_data;
+ int i, ret = 0;
if (!sr_info) {
dev_err(&pdev->dev, "%s: unable to allocate sr_info\n",
@@ -897,6 +899,46 @@ static int __init omap_sr_probe(struct platform_device *pdev)
(void) debugfs_create_file("autocomp", S_IRUGO | S_IWUGO, dbg_dir,
(void *)sr_info, &pm_sr_fops);
+ (void) debugfs_create_x32("errweight", S_IRUGO, dbg_dir,
+ &sr_info->err_weight);
+ (void) debugfs_create_x32("errmaxlimit", S_IRUGO, dbg_dir,
+ &sr_info->err_maxlimit);
+ (void) debugfs_create_x32("errminlimit", S_IRUGO, dbg_dir,
+ &sr_info->err_minlimit);
+
+ nvalue_dir = debugfs_create_dir("nvalue", dbg_dir);
+ if (IS_ERR(nvalue_dir)) {
+ dev_err(&pdev->dev, "%s: Unable to create debugfs directory"
+ "for n-values\n", __func__);
+ return PTR_ERR(nvalue_dir);
+ }
+
+ omap_voltage_get_volttable(sr_info->voltdm, &volt_data);
+ if (!volt_data) {
+ dev_warn(&pdev->dev, "%s: No Voltage table for the"
+ " corresponding vdd vdd_%s. Cannot create debugfs"
+ "entries for n-values\n",
+ __func__, sr_info->voltdm->name);
+ return -ENODATA;
+ }
+
+ for (i = 0; i < sr_info->nvalue_count; i++) {
+ char *name;
+ char volt_name[32];
+
+ name = kzalloc(NVALUE_NAME_LEN + 1, GFP_KERNEL);
+ if (!name) {
+ dev_err(&pdev->dev, "%s: Unable to allocate memory"
+ " for n-value directory name\n", __func__);
+ return -ENOMEM;
+ }
+
+ strcpy(name, "volt_");
+ sprintf(volt_name, "%d", volt_data[i].volt_nominal);
+ strcat(name, volt_name);
+ (void) debugfs_create_x32(name, S_IRUGO | S_IWUGO, nvalue_dir,
+ &(sr_info->nvalue_table[i].nvalue));
+ }
return ret;