[PATCH 2/4] cpufreq: ti-cpufreq: Add support for multiple regulators

[viresh.kumar@linaro.org (Viresh Kumar)]

On 13-12-17, 14:33, Dave Gerlach wrote:
> Some platforms, like those in the DRA7 and AM57 families, require the
> scaling of multiple regulators in order to properly support higher OPPs.
> Let the ti-cpufreq driver determine when this is required and pass the
> appropriate regulator names to the OPP core so that they can be properly
> managed.
> 
> Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
> ---
>  drivers/cpufreq/ti-cpufreq.c | 28 ++++++++++++++++++++++++----
>  1 file changed, 24 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/cpufreq/ti-cpufreq.c b/drivers/cpufreq/ti-cpufreq.c
> index b1c230a1e2aa..a099b7bf74cd 100644
> --- a/drivers/cpufreq/ti-cpufreq.c
> +++ b/drivers/cpufreq/ti-cpufreq.c
> @@ -51,6 +51,7 @@ struct ti_cpufreq_soc_data {
>  	unsigned long efuse_mask;
>  	unsigned long efuse_shift;
>  	unsigned long rev_offset;
> +	bool multi_regulator;
>  };
>  
>  struct ti_cpufreq_data {
> @@ -58,6 +59,7 @@ struct ti_cpufreq_data {
>  	struct device_node *opp_node;
>  	struct regmap *syscon;
>  	const struct ti_cpufreq_soc_data *soc_data;
> +	struct opp_table *opp_table;
>  };
>  
>  static unsigned long amx3_efuse_xlate(struct ti_cpufreq_data *opp_data,
> @@ -96,6 +98,7 @@ static struct ti_cpufreq_soc_data am3x_soc_data = {
>  	.efuse_offset = 0x07fc,
>  	.efuse_mask = 0x1fff,
>  	.rev_offset = 0x600,
> +	.multi_regulator = false,
>  };
>  
>  static struct ti_cpufreq_soc_data am4x_soc_data = {
> @@ -104,6 +107,7 @@ static struct ti_cpufreq_soc_data am4x_soc_data = {
>  	.efuse_offset = 0x0610,
>  	.efuse_mask = 0x3f,
>  	.rev_offset = 0x600,
> +	.multi_regulator = false,
>  };
>  
>  static struct ti_cpufreq_soc_data dra7_soc_data = {
> @@ -112,6 +116,7 @@ static struct ti_cpufreq_soc_data dra7_soc_data = {
>  	.efuse_mask = 0xf80000,
>  	.efuse_shift = 19,
>  	.rev_offset = 0x204,
> +	.multi_regulator = true,
>  };
>  
>  /**
> @@ -201,7 +206,9 @@ static int ti_cpufreq_probe(struct platform_device *pdev)
>  	u32 version[VERSION_COUNT];
>  	struct device_node *np;
>  	const struct of_device_id *match;
> +	struct opp_table *ti_opp_table;
>  	struct ti_cpufreq_data *opp_data;
> +	const char * const reg_names[] = {"vdd", "vbb"};
>  	int ret;
>  
>  	np = of_find_node_by_path("/");
> @@ -248,16 +255,29 @@ static int ti_cpufreq_probe(struct platform_device *pdev)
>  	if (ret)
>  		goto fail_put_node;
>  
> -	ret = PTR_ERR_OR_ZERO(dev_pm_opp_set_supported_hw(opp_data->cpu_dev,
> -							  version, VERSION_COUNT));
> -	if (ret) {
> +	ti_opp_table = dev_pm_opp_set_supported_hw(opp_data->cpu_dev,
> +						   version, VERSION_COUNT);
> +	if (IS_ERR(ti_opp_table)) {
>  		dev_err(opp_data->cpu_dev,
>  			"Failed to set supported hardware\n");
> +		ret = PTR_ERR(ti_opp_table);
>  		goto fail_put_node;
>  	}
>  
> -	of_node_put(opp_data->opp_node);
> +	opp_data->opp_table = ti_opp_table;
> +
> +	if (opp_data->soc_data->multi_regulator) {
> +		ti_opp_table = dev_pm_opp_set_regulators(opp_data->cpu_dev,
> +							 reg_names,
> +							 ARRAY_SIZE(reg_names));
> +		if (IS_ERR(ti_opp_table)) {
> +			dev_pm_opp_put_supported_hw(opp_data->opp_table);
> +			ret =  PTR_ERR(ti_opp_table);
> +			goto fail_put_node;
> +		}
> +	}
>  
> +	of_node_put(opp_data->opp_node);
>  register_cpufreq_dt:
>  	platform_device_register_simple("cpufreq-dt", -1, NULL, 0);

Acked-by: Viresh Kumar <viresh.kumar@linaro.org>

-- 
viresh