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authorViresh Kumar <viresh.kumar@linaro.org>2014-08-28 09:52:29 +0400
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-09-09 03:44:41 +0400
commit2d2c5e0e72546c1b4375ff5820ca8016c7123cbb (patch)
tree7c68dff7ab1009909c30b55e006a58d44bb8f823 /drivers/cpufreq/cpufreq-cpu0.c
parentd2f31f1da54f83c4eb2738402284c49cd51798d1 (diff)
downloadlinux-2d2c5e0e72546c1b4375ff5820ca8016c7123cbb.tar.xz
cpufreq: cpu0: try regulators with name "cpu-supply"
Currently, we expect regulator name to be "cpu0", but as we are going to support multiple cpu-blocks (all CPUs in a block share clock/voltage) later, we need to pass some generic string instead of that. For backwards compatibility try for "cpu0" first and if it fails, then try for "cpu". Suggested-by: Stephen Boyd <sboyd@codeaurora.org> Tested-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq/cpufreq-cpu0.c')
-rw-r--r--drivers/cpufreq/cpufreq-cpu0.c14
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/cpufreq/cpufreq-cpu0.c b/drivers/cpufreq/cpufreq-cpu0.c
index 03e352b627dd..de38952dab1a 100644
--- a/drivers/cpufreq/cpufreq-cpu0.c
+++ b/drivers/cpufreq/cpufreq-cpu0.c
@@ -113,6 +113,7 @@ static int allocate_resources(struct device **cdev,
struct regulator *cpu_reg;
struct clk *cpu_clk;
int ret = 0;
+ char *reg_cpu0 = "cpu0", *reg_cpu = "cpu", *reg;
cpu_dev = get_cpu_device(0);
if (!cpu_dev) {
@@ -120,7 +121,11 @@ static int allocate_resources(struct device **cdev,
return -ENODEV;
}
- cpu_reg = regulator_get_optional(cpu_dev, "cpu0");
+ /* Try "cpu0" for older DTs */
+ reg = reg_cpu0;
+
+try_again:
+ cpu_reg = regulator_get_optional(cpu_dev, reg);
if (IS_ERR(cpu_reg)) {
/*
* If cpu0 regulator supply node is present, but regulator is
@@ -130,6 +135,13 @@ static int allocate_resources(struct device **cdev,
dev_dbg(cpu_dev, "cpu0 regulator not ready, retry\n");
return -EPROBE_DEFER;
}
+
+ /* Try with "cpu-supply" */
+ if (reg == reg_cpu0) {
+ reg = reg_cpu;
+ goto try_again;
+ }
+
dev_warn(cpu_dev, "failed to get cpu0 regulator: %ld\n",
PTR_ERR(cpu_reg));
}