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. By default
only a read of these parameters are permitted. If you need to
write into them then
echo 1 > /pm_debug/enable_sr_vp_debug
The voltage parameters can be viewed at
/pm_debug/voltage/vdd_<x>/<parameter>
and the smartreflex parameters can be viewed at
/pm_debug/smartreflex/sr_<x>/<parameter>
where <x> is mpu or core for OMAP3.
Signed-off-by: Thara Gopinath <[email protected]>
---
arch/arm/mach-omap2/pm-debug.c | 15 ++
arch/arm/mach-omap2/smartreflex.c | 40 +++++-
arch/arm/mach-omap2/voltage.c | 210 ++++++++++++++++++++++++-
arch/arm/plat-omap/include/plat/smartreflex.h | 1 -
arch/arm/plat-omap/include/plat/voltage.h | 5 +
5 files changed, 264 insertions(+), 7 deletions(-)
diff --git a/arch/arm/mach-omap2/pm-debug.c b/arch/arm/mach-omap2/pm-debug.c
index 390f1c6..879efb2 100644
--- a/arch/arm/mach-omap2/pm-debug.c
+++ b/arch/arm/mach-omap2/pm-debug.c
@@ -32,6 +32,7 @@
#include <plat/powerdomain.h>
#include <plat/clockdomain.h>
#include <plat/dmtimer.h>
+#include <plat/voltage.h>
#include "prm.h"
#include "cm.h"
@@ -586,6 +587,18 @@ static int option_set(void *data, u64 val)
omap3_pm_off_mode_enable(val);
}
+ if (option == &enable_sr_vp_debug && val)
+ pr_notice("Beware that enabling this option will allow user "
+ "to override the system defined vp and sr parameters "
+ "All the updated parameters will take effect next "
+ "time smartreflex is enabled. Also this option "
+ "disables the automatic vp errorgain and sr errormin "
+ "limit changes as per the voltage. Users will have "
+ "to explicitly write values into the debug fs "
+ "entries corresponding to these if they want to see "
+ "them changing according to the VDD voltage\n");
+
+
return 0;
}
@@ -642,6 +655,8 @@ static int __init pm_dbg_init(void)
(void) debugfs_create_file("wakeup_timer_milliseconds",
S_IRUGO | S_IWUGO, d, &wakeup_timer_milliseconds,
&pm_dbg_option_fops);
+ (void) debugfs_create_file("enable_sr_vp_debug", S_IRUGO | S_IWUGO, d,
+ &enable_sr_vp_debug, &pm_dbg_option_fops);
pm_dbg_main_dir = d;
pm_dbg_init_done = 1;
diff --git a/arch/arm/mach-omap2/smartreflex.c
b/arch/arm/mach-omap2/smartreflex.c
index 7fc3138..b5a7878 100644
--- a/arch/arm/mach-omap2/smartreflex.c
+++ b/arch/arm/mach-omap2/smartreflex.c
@@ -558,8 +558,13 @@ int sr_enable(struct voltagedomain *voltdm, unsigned long
volt)
return -ENODATA;
}
- /* errminlimit is opp dependent and hence linked to voltage */
- sr->err_minlimit = volt_data->sr_errminlimit;
+ /*
+ * errminlimit is opp dependent and hence linked to voltage
+ * if the debug option is enabled, the user might have over ridden
+ * this parameter so do not get it from voltage table
+ */
+ if (!enable_sr_vp_debug)
+ sr->err_minlimit = volt_data->sr_errminlimit;
/* Enable the clocks */
if (!sr->sr_enable) {
@@ -811,9 +816,34 @@ static int omap_sr_autocomp_store(void *data, u64 val)
return 0;
}
+static int omap_sr_params_show(void *data, u64 *val)
+{
+ u32 *param = data;
+
+ *val = *param;
+ return 0;
+}
+
+static int omap_sr_params_store(void *data, u64 val)
+{
+ if (enable_sr_vp_debug) {
+ u32 *option = data;
+ *option = val;
+ } else {
+ pr_notice("%s: DEBUG option not enabled!\n \
+ echo 1 > pm_debug/enable_sr_vp_debug - to enable\n",
+ __func__);
+ }
+
+ return 0;
+}
+
DEFINE_SIMPLE_ATTRIBUTE(pm_sr_fops, omap_sr_autocomp_show,
omap_sr_autocomp_store, "%llu\n");
+DEFINE_SIMPLE_ATTRIBUTE(sr_params_fops, omap_sr_params_show,
+ omap_sr_params_store, "%llu\n");
+
static int __init omap_smartreflex_probe(struct platform_device *pdev)
{
struct omap_sr *sr_info = kzalloc(sizeof(struct omap_sr), GFP_KERNEL);
@@ -907,6 +937,12 @@ static int __init omap_smartreflex_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_file("errweight", S_IRUGO | S_IWUGO, dbg_dir,
+ &sr_info->err_weight, &sr_params_fops);
+ (void) debugfs_create_file("errmaxlimit", S_IRUGO | S_IWUGO, dbg_dir,
+ &sr_info->err_maxlimit, &sr_params_fops);
+ (void) debugfs_create_file("errminlimit", S_IRUGO | S_IWUGO, dbg_dir,
+ &sr_info->err_minlimit, &sr_params_fops);
return ret;
diff --git a/arch/arm/mach-omap2/voltage.c b/arch/arm/mach-omap2/voltage.c
index 49013cb..70a645e 100644
--- a/arch/arm/mach-omap2/voltage.c
+++ b/arch/arm/mach-omap2/voltage.c
@@ -22,15 +22,22 @@
#include <linux/io.h>
#include <linux/clk.h>
#include <linux/err.h>
+#include <linux/debugfs.h>
+#include <linux/slab.h>
#include <plat/common.h>
#include <plat/voltage.h>
#include "prm-regbits-34xx.h"
+#include "pm.h"
#define VP_IDLE_TIMEOUT 200
#define VP_TRANXDONE_TIMEOUT 300
+#define VOLTAGE_DIR_SIZE 16
+static struct dentry *voltage_dir;
+/* VP SR debug support */
+u32 enable_sr_vp_debug;
/* PRM voltage module */
static u32 volt_mod;
@@ -221,6 +228,82 @@ static inline void voltage_write_reg(u8 offset, u32 value)
prm_write_mod_reg(value, volt_mod, offset);
}
+/* Voltage debugfs support */
+static int vp_debug_get(void *data, u64 *val)
+{
+ u16 *option = data;
+
+ if (!option) {
+ pr_warning("Wrong paramater passed\n");
+ return -EINVAL;
+ }
+
+ *val = *option;
+
+ return 0;
+}
+
+static int vp_debug_set(void *data, u64 val)
+{
+ if (enable_sr_vp_debug) {
+ u32 *option = data;
+
+ if (!option) {
+ pr_warning("Wrong paramater passed\n");
+ return -EINVAL;
+ }
+
+ *option = val;
+ } else {
+ pr_notice("DEBUG option not enabled!"
+ "echo 1 > pm_debug/enable_sr_vp_debug - to enable\n");
+ }
+
+ return 0;
+}
+
+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 = voltage_read_reg(vdd->vp_offs.voltage);
+ pr_notice("curr_vsel = %x\n", vsel);
+
+ if (!volt_pmic_info.vsel_to_uv) {
+ pr_warning("PMIC function to convert vsel to voltage"
+ "in uV not registerd\n");
+ return -EINVAL;
+ }
+
+ *val = volt_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_debug_fops, vp_debug_get, vp_debug_set, "%llu\n");
+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;
@@ -457,6 +540,61 @@ static void __init vdd_data_configure(struct omap_vdd_info
*vdd)
omap3_vdd_data_configure(vdd);
}
+static void __init vdd_debugfs_init(struct omap_vdd_info *vdd)
+{
+ struct dentry *vdd_debug;
+ char *name;
+
+ name = kzalloc(VOLTAGE_DIR_SIZE, GFP_KERNEL);
+ if (!name) {
+ pr_warning("%s: Unable to allocate memry for debugfs"
+ "directory name for vdd_%s",
+ __func__, vdd->voltdm.name);
+ return;
+ }
+ strcpy(name, "vdd_");
+ strcat(name, vdd->voltdm.name);
+
+ vdd_debug = debugfs_create_dir(name, voltage_dir);
+ if (IS_ERR(vdd_debug)) {
+ pr_warning("%s: Unable to create debugfs directory for"
+ "vdd_%s\n", __func__, vdd->voltdm.name);
+ return;
+ }
+
+ (void) debugfs_create_file("vp_errorgain", S_IRUGO | S_IWUGO,
+ vdd_debug,
+ &(vdd->vp_reg.vpconfig_errorgain),
+ &vp_debug_fops);
+ (void) debugfs_create_file("vp_smpswaittimemin", S_IRUGO | S_IWUGO,
+ vdd_debug,
+ &(vdd->vp_reg.vstepmin_smpswaittimemin),
+ &vp_debug_fops);
+ (void) debugfs_create_file("vp_stepmin", S_IRUGO | S_IWUGO, vdd_debug,
+ &(vdd->vp_reg.vstepmin_stepmin),
+ &vp_debug_fops);
+ (void) debugfs_create_file("vp_smpswaittimemax", S_IRUGO | S_IWUGO,
+ vdd_debug,
+ &(vdd->vp_reg.vstepmax_smpswaittimemax),
+ &vp_debug_fops);
+ (void) debugfs_create_file("vp_stepmax", S_IRUGO | S_IWUGO, vdd_debug,
+ &(vdd->vp_reg.vstepmax_stepmax),
+ &vp_debug_fops);
+ (void) debugfs_create_file("vp_vddmax", S_IRUGO | S_IWUGO, vdd_debug,
+ &(vdd->vp_reg.vlimitto_vddmax),
+ &vp_debug_fops);
+ (void) debugfs_create_file("vp_vddmin", S_IRUGO | S_IWUGO, vdd_debug,
+ &(vdd->vp_reg.vlimitto_vddmin),
+ &vp_debug_fops);
+ (void) debugfs_create_file("vp_timeout", S_IRUGO | S_IWUGO, vdd_debug,
+ &(vdd->vp_reg.vlimitto_timeout),
+ &vp_debug_fops);
+ (void) debugfs_create_file("curr_vp_volt", S_IRUGO, vdd_debug,
+ (void *) vdd, &vp_volt_debug_fops);
+ (void) debugfs_create_file("curr_nominal_volt", S_IRUGO, vdd_debug,
+ (void *) vdd, &nom_volt_debug_fops);
+}
+
static void __init init_voltagecontroller(void)
{
if (cpu_is_omap34xx())
@@ -524,8 +662,11 @@ static int vc_bypass_scale_voltage(struct omap_vdd_info
*vdd,
vc_cmdval |= (target_vsel << vc_cmd_on_shift);
voltage_write_reg(vdd->cmdval_reg, vc_cmdval);
- /* Setting vp errorgain based on the voltage */
- if (volt_data) {
+ /*
+ * Setting vp errorgain based on the voltage. If the debug option is
+ * enabled allow the override of errorgain from user side
+ */
+ if (!enable_sr_vp_debug && volt_data) {
vp_errgain_val = voltage_read_reg(vdd->vp_offs.vpconfig);
vdd->vp_reg.vpconfig_errorgain = volt_data->vp_errgain;
vp_errgain_val &= ~vdd->vp_reg.vpconfig_errorgain_mask;
@@ -630,8 +771,11 @@ static int vp_forceupdate_scale_voltage(struct
omap_vdd_info *vdd,
vc_cmdval |= (target_vsel << vc_cmd_on_shift);
voltage_write_reg(vdd->cmdval_reg, vc_cmdval);
- /* Getting vp errorgain based on the voltage */
- if (volt_data)
+ /*
+ * Getting vp errorgain based on the voltage. If the debug option is
+ * enabled allow the override of errorgain from user side.
+ */
+ if (!enable_sr_vp_debug && volt_data)
vdd->vp_reg.vpconfig_errorgain =
volt_data->vp_errgain;
@@ -806,6 +950,37 @@ void omap_vp_enable(struct voltagedomain *voltdm)
if (!voltscale_vpforceupdate)
vp_latch_vsel(vdd);
+ /*
+ * If debug is enabled, it is likely that the following parameters
+ * were set from user space so rewrite them.
+ */
+ if (enable_sr_vp_debug) {
+ vpconfig = voltage_read_reg(vdd->vp_offs.vpconfig);
+ vpconfig |= (vdd->vp_reg.vpconfig_errorgain <<
+ vdd->vp_reg.vpconfig_errorgain_shift);
+ voltage_write_reg(vdd->vp_offs.vpconfig, vpconfig);
+
+ voltage_write_reg(vdd->vp_offs.vstepmin,
+ (vdd->vp_reg.vstepmin_smpswaittimemin <<
+ vdd->vp_reg.vstepmin_smpswaittimemin_shift) |
+ (vdd->vp_reg.vstepmin_stepmin <<
+ vdd->vp_reg.vstepmin_stepmin_shift));
+
+ voltage_write_reg(vdd->vp_offs.vstepmax,
+ (vdd->vp_reg.vstepmax_smpswaittimemax <<
+ vdd->vp_reg.vstepmax_smpswaittimemax_shift) |
+ (vdd->vp_reg.vstepmax_stepmax <<
+ vdd->vp_reg.vstepmax_stepmax_shift));
+
+ voltage_write_reg(vdd->vp_offs.vlimitto,
+ (vdd->vp_reg.vlimitto_vddmax <<
+ vdd->vp_reg.vlimitto_vddmax_shift) |
+ (vdd->vp_reg.vlimitto_vddmin <<
+ vdd->vp_reg.vlimitto_vddmin_shift) |
+ (vdd->vp_reg.vlimitto_timeout <<
+ vdd->vp_reg.vlimitto_timeout_shift));
+ }
+
/* Enable VP */
vpconfig = voltage_read_reg(vdd->vp_offs.vpconfig);
voltage_write_reg(vdd->vp_offs.vpconfig,
@@ -1107,6 +1282,7 @@ static int __init omap_voltage_init(void)
return 0;
}
+
init_voltagecontroller();
for (i = 0; i < nr_scalable_vdd; i++) {
vdd_data_configure(&vdd_info[i]);
@@ -1115,3 +1291,29 @@ static int __init omap_voltage_init(void)
return 0;
}
core_initcall(omap_voltage_init);
+
+static int __init omap_voltage_debugfs_init(void)
+{
+ int i;
+
+ /*
+ * If pm debug main directory is not created,
+ * do not create rest of the debugfs entries.
+ */
+ if (!pm_dbg_main_dir)
+ return 0;
+
+ voltage_dir = debugfs_create_dir("voltage", pm_dbg_main_dir);
+ if (IS_ERR(voltage_dir)) {
+ pr_err("%s: Unable to create voltage debugfs main dir\n",
+ __func__);
+ return 0;
+ }
+
+ for (i = 0; i < nr_scalable_vdd; i++)
+ vdd_debugfs_init(&vdd_info[i]);
+
+ return 0;
+}
+
+late_initcall(omap_voltage_debugfs_init);
diff --git a/arch/arm/plat-omap/include/plat/smartreflex.h
b/arch/arm/plat-omap/include/plat/smartreflex.h
index 1ad03ea..4ee548d 100644
--- a/arch/arm/plat-omap/include/plat/smartreflex.h
+++ b/arch/arm/plat-omap/include/plat/smartreflex.h
@@ -24,7 +24,6 @@
#include <plat/voltage.h>
#ifdef CONFIG_PM_DEBUG
-extern struct dentry *pm_dbg_main_dir;
extern struct dentry *sr_dbg_dir;
#endif
diff --git a/arch/arm/plat-omap/include/plat/voltage.h
b/arch/arm/plat-omap/include/plat/voltage.h
index 99836a1..8978d33 100644
--- a/arch/arm/plat-omap/include/plat/voltage.h
+++ b/arch/arm/plat-omap/include/plat/voltage.h
@@ -14,6 +14,11 @@
#ifndef __ARCH_ARM_MACH_OMAP2_VOLTAGE_H
#define __ARCH_ARM_MACH_OMAP2_VOLTAGE_H
+extern u32 enable_sr_vp_debug;
+#ifdef CONFIG_PM_DEBUG
+extern struct dentry *pm_dbg_main_dir;
+#endif
+
#define VOLTSCALE_VPFORCEUPDATE 1
#define VOLTSCALE_VCBYPASS 2
--
1.7.1.GIT
--
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