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| author | Viresh Kumar <viresh.kumar@linaro.org> | 2014-08-28 07:52:29 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-09-09 01:44:41 +0200 |
| commit | 2d2c5e0e72546c1b4375ff5820ca8016c7123cbb (patch) | |
| tree | 7c68dff7ab1009909c30b55e006a58d44bb8f823 | |
| parent | cpufreq: cpu0: Move per-cluster initialization code to ->init() (diff) | |
| download | linux-2d2c5e0e72546c1b4375ff5820ca8016c7123cbb.tar.xz linux-2d2c5e0e72546c1b4375ff5820ca8016c7123cbb.zip | |
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>
| -rw-r--r-- | drivers/cpufreq/cpufreq-cpu0.c | 14 |
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)); } |