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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>
This commit is contained in:
Thara Gopinath 2010-10-27 20:29:37 +05:30 committed by Kevin Hilman
parent fbc319f676
commit 077fceca3a
2 changed files with 110 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

46
arch/arm/mach-omap2/smartreflex.c
View File

@ -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;

66
arch/arm/mach-omap2/voltage.c
View File

@ -250,6 +250,47 @@ static void omap3_voltage_write_reg(u32 val, u16 mod, u8 offset)
omap2_prm_write_mod_reg(val, mod, offset);
}
/* Voltage debugfs support */
static int vp_volt_debug_get(void *data, u64 *val)
{
struct omap_vdd_info *vdd = (struct omap_vdd_info *) data;
u8 vsel;
if (!vdd) {
pr_warning("Wrong paramater passed\n");
return -EINVAL;
}
vsel = vdd->read_reg(vdd->vp_reg.prm_mod, vdd->vp_offs.voltage);
pr_notice("curr_vsel = %x\n", vsel);
if (!vdd->pmic_info->vsel_to_uv) {
pr_warning("PMIC function to convert vsel to voltage"
"in uV not registerd\n");
return -EINVAL;
}
*val = vdd->pmic_info->vsel_to_uv(vsel);
return 0;
}
static int nom_volt_debug_get(void *data, u64 *val)
{
struct omap_vdd_info *vdd = (struct omap_vdd_info *) data;
if (!vdd) {
pr_warning("Wrong paramater passed\n");
return -EINVAL;
}
*val = omap_voltage_get_nom_volt(&vdd->voltdm);
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(vp_volt_debug_fops, vp_volt_debug_get, NULL, "%llu\n");
DEFINE_SIMPLE_ATTRIBUTE(nom_volt_debug_fops, nom_volt_debug_get, NULL,
"%llu\n");
static void vp_latch_vsel(struct omap_vdd_info *vdd)
{
u32 vpconfig;
@ -349,7 +390,32 @@ static void __init vdd_debugfs_init(struct omap_vdd_info *vdd)
pr_warning("%s: Unable to create debugfs directory for"
" vdd_%s\n", __func__, vdd->voltdm.name);
vdd->debug_dir = NULL;
return;
}
(void) debugfs_create_x16("vp_errorgain", S_IRUGO, vdd->debug_dir,
&(vdd->vp_reg.vpconfig_errorgain));
(void) debugfs_create_x16("vp_smpswaittimemin", S_IRUGO,
vdd->debug_dir,
&(vdd->vp_reg.vstepmin_smpswaittimemin));
(void) debugfs_create_x8("vp_stepmin", S_IRUGO, vdd->debug_dir,
&(vdd->vp_reg.vstepmin_stepmin));
(void) debugfs_create_x16("vp_smpswaittimemax", S_IRUGO,
vdd->debug_dir,
&(vdd->vp_reg.vstepmax_smpswaittimemax));
(void) debugfs_create_x8("vp_stepmax", S_IRUGO, vdd->debug_dir,
&(vdd->vp_reg.vstepmax_stepmax));
(void) debugfs_create_x8("vp_vddmax", S_IRUGO, vdd->debug_dir,
&(vdd->vp_reg.vlimitto_vddmax));
(void) debugfs_create_x8("vp_vddmin", S_IRUGO, vdd->debug_dir,
&(vdd->vp_reg.vlimitto_vddmin));
(void) debugfs_create_x16("vp_timeout", S_IRUGO, vdd->debug_dir,
&(vdd->vp_reg.vlimitto_timeout));
(void) debugfs_create_file("curr_vp_volt", S_IRUGO, vdd->debug_dir,
(void *) vdd, &vp_volt_debug_fops);
(void) debugfs_create_file("curr_nominal_volt", S_IRUGO,
vdd->debug_dir, (void *) vdd,
&nom_volt_debug_fops);
}
/* Voltage scale and accessory APIs */