Sekhar Nori <[email protected]> writes:
> This patch adds support for regulating the CVDD voltage for the
> DA850/OMAP-L138 platform.
>
> The CVDD min and max values for each OPP have been obtained from
> section 5.2 "Recommended Operating Conditions" of SPRS586
>
> Signed-off-by: Sekhar Nori <[email protected]>
Looks good, pushing today.
Kevin
> ---
> arch/arm/mach-davinci/da850.c | 43
> +++++++++++++++++++++++++++++++++++++++++
> 1 files changed, 43 insertions(+), 0 deletions(-)
>
> diff --git a/arch/arm/mach-davinci/da850.c b/arch/arm/mach-davinci/da850.c
> index 49dcc71..0e1027e 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),
> --
> 1.6.2.4
>
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