cpufreq: ti-cpufreq: omap36xx use "cpu0","vbb" if run in multi_regulator mode

In preparation for using the multi_regulator capability of
this driver for handling the ABB LDO for OPP1G of the omap36xx
we have to take care that the (legacy) vdd-supply name is
cpu0-supply = <&vcc>;

To do this we add another field to the SoC description table which
optionally can specify a list of regulator names.

For omap36xx we define "cpu0-supply" and "vbb-supply".

The default remains "vdd-supply" and "vbb-supply".

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Acked-by: Rob Herring <robh@kernel.org>
Tested-by: Adam Ford <aford173@gmail.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

diff --git a/Documentation/devicetree/bindings/cpufreq/ti-cpufreq.txt b/Documentation/devicetree/bindings/cpufreq/ti-cpufreq.txt
index 0c38e4b..1758051 100644 (file)
--- a/Documentation/devicetree/bindings/cpufreq/ti-cpufreq.txt
+++ b/Documentation/devicetree/bindings/cpufreq/ti-cpufreq.txt
@@ -15,12 +15,16 @@ In 'cpus' nodes:
 
 In 'operating-points-v2' table:
 - compatible: Should be
-       - 'operating-points-v2-ti-cpu' for am335x, am43xx, and dra7xx/am57xx SoCs
+       - 'operating-points-v2-ti-cpu' for am335x, am43xx, and dra7xx/am57xx,
+         omap34xx, omap36xx and am3517 SoCs
 - syscon: A phandle pointing to a syscon node representing the control module
          register space of the SoC.
 
 Optional properties:
 --------------------
+- "vdd-supply", "vbb-supply": to define two regulators for dra7xx
+- "cpu0-supply", "vbb-supply": to define two regulators for omap36xx
+
 For each opp entry in 'operating-points-v2' table:
 - opp-supported-hw: Two bitfields indicating:
        1. Which revision of the SoC the OPP is supported by

diff --git a/drivers/cpufreq/ti-cpufreq.c b/drivers/cpufreq/ti-cpufreq.c
index 13d4265..a161098 100644 (file)
--- a/drivers/cpufreq/ti-cpufreq.c
+++ b/drivers/cpufreq/ti-cpufreq.c
@@ -41,6 +41,7 @@
 struct ti_cpufreq_data;
 
 struct ti_cpufreq_soc_data {
+       const char * const *reg_names;
        unsigned long (*efuse_xlate)(struct ti_cpufreq_data *opp_data,
                                     unsigned long efuse);
        unsigned long efuse_fallback;
@@ -165,7 +166,10 @@ static struct ti_cpufreq_soc_data omap34xx_soc_data = {
  *    seems to always read as 0).
  */
 
+static const char * const omap3_reg_names[] = {"cpu0", "vbb"};
+
 static struct ti_cpufreq_soc_data omap36xx_soc_data = {
+       .reg_names = omap3_reg_names,
        .efuse_xlate = omap3_efuse_xlate,
        .efuse_offset = OMAP3_CONTROL_DEVICE_STATUS - OMAP3_SYSCON_BASE,
        .efuse_shift = 9,
@@ -299,7 +303,7 @@ static int ti_cpufreq_probe(struct platform_device *pdev)
        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"};
+       const char * const default_reg_names[] = {"vdd", "vbb"};
        int ret;
 
        match = dev_get_platdata(&pdev->dev);
@@ -355,9 +359,13 @@ static int ti_cpufreq_probe(struct platform_device *pdev)
        opp_data->opp_table = ti_opp_table;
 
        if (opp_data->soc_data->multi_regulator) {
+               const char * const *reg_names = default_reg_names;
+
+               if (opp_data->soc_data->reg_names)
+                       reg_names = opp_data->soc_data->reg_names;
                ti_opp_table = dev_pm_opp_set_regulators(opp_data->cpu_dev,
                                                         reg_names,
-                                                        ARRAY_SIZE(reg_names));
+                                                        ARRAY_SIZE(default_reg_names));
                if (IS_ERR(ti_opp_table)) {
                        dev_pm_opp_put_supported_hw(opp_data->opp_table);
                        ret =  PTR_ERR(ti_opp_table);