From: Viresh Kumar Date: Thu, 28 Aug 2014 05:52:29 +0000 (+0530) Subject: cpufreq: cpu0: try regulators with name "cpu-supply" X-Git-Tag: v3.18-rc1~109^2~3^2^2~8 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=2d2c5e0e72546c1b4375ff5820ca8016c7123cbb;p=karo-tx-linux.git 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 Tested-by: Stephen Boyd Signed-off-by: Viresh Kumar Signed-off-by: Rafael J. Wysocki --- 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)); }