summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-davinci
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mach-davinci')
-rw-r--r--arch/arm/mach-davinci/da850.c43
1 files changed, 43 insertions, 0 deletions
diff --git a/arch/arm/mach-davinci/da850.c b/arch/arm/mach-davinci/da850.c
index 49dcc71168c7..0e1027ea8a40 100644
--- a/arch/arm/mach-davinci/da850.c
+++ b/arch/arm/mach-davinci/da850.c
@@ -16,6 +16,7 @@
#include <linux/clk.h>
#include <linux/platform_device.h>
#include <linux/cpufreq.h>
+#include <linux/regulator/consumer.h>
#include <asm/mach/map.h>
@@ -844,6 +845,8 @@ struct da850_opp {
unsigned int prediv;
unsigned int mult;
unsigned int postdiv;
+ unsigned int cvdd_min; /* in uV */
+ unsigned int cvdd_max; /* in uV */
};
static const struct da850_opp da850_opp_300 = {
@@ -851,6 +854,8 @@ static const struct da850_opp da850_opp_300 = {
.prediv = 1,
.mult = 25,
.postdiv = 2,
+ .cvdd_min = 1140000,
+ .cvdd_max = 1320000,
};
static const struct da850_opp da850_opp_200 = {
@@ -858,6 +863,8 @@ static const struct da850_opp da850_opp_200 = {
.prediv = 1,
.mult = 25,
.postdiv = 3,
+ .cvdd_min = 1050000,
+ .cvdd_max = 1160000,
};
static const struct da850_opp da850_opp_96 = {
@@ -865,6 +872,8 @@ static const struct da850_opp da850_opp_96 = {
.prediv = 1,
.mult = 20,
.postdiv = 5,
+ .cvdd_min = 950000,
+ .cvdd_max = 1050000,
};
#define OPP(freq) \
@@ -973,6 +982,40 @@ static int da850_round_armrate(struct clk *clk, unsigned long rate)
}
#endif
+#ifdef CONFIG_REGULATOR
+static struct regulator *cvdd;
+
+static int da850_set_voltage(unsigned int index)
+{
+ struct da850_opp *opp;
+
+ if (!cvdd)
+ return -ENODEV;
+
+ opp = (struct da850_opp *) da850_freq_table[index].index;
+
+ return regulator_set_voltage(cvdd, opp->cvdd_min, opp->cvdd_max);
+}
+
+static int __init da850_regulator_init(void)
+{
+ int ret = 0;
+
+ cvdd = regulator_get(NULL, "cvdd");
+ if (WARN(IS_ERR(cvdd), "Unable to obtain voltage regulator for CVDD;"
+ " voltage scaling unsupported\n")) {
+ ret = PTR_ERR(cvdd);
+ goto out;
+ }
+
+ cpufreq_info.set_voltage = da850_set_voltage;
+
+out:
+ return ret;
+}
+device_initcall(da850_regulator_init);
+#endif
+
static struct davinci_soc_info davinci_soc_info_da850 = {
.io_desc = da850_io_desc,
.io_desc_num = ARRAY_SIZE(da850_io_desc),