Add suspend frequency support and if needed set it to the frequency obtained from the suspend opp (can be defined using opp-v2 bindings and is optional). Also implement custom suspend method (needed to not error out on platforms which don't require suspend frequency).
Cc: Viresh Kumar <[email protected]> Cc: Thomas Abraham <[email protected]> Cc: Javier Martinez Canillas <[email protected]> Cc: Krzysztof Kozlowski <[email protected]> Cc: Marek Szyprowski <[email protected]> Cc: Tobias Jakobi <[email protected]> Signed-off-by: Bartlomiej Zolnierkiewicz <[email protected]> --- drivers/cpufreq/cpufreq-dt.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/drivers/cpufreq/cpufreq-dt.c b/drivers/cpufreq/cpufreq-dt.c index c3583cd..ba4ca85 100644 --- a/drivers/cpufreq/cpufreq-dt.c +++ b/drivers/cpufreq/cpufreq-dt.c @@ -196,6 +196,7 @@ static int cpufreq_init(struct cpufreq_policy *policy) struct device *cpu_dev; struct regulator *cpu_reg; struct clk *cpu_clk; + struct dev_pm_opp *suspend_opp; unsigned long min_uV = ~0, max_uV = 0; unsigned int transition_latency; bool need_update = false; @@ -329,6 +330,11 @@ static int cpufreq_init(struct cpufreq_policy *policy) policy->driver_data = priv; policy->clk = cpu_clk; + + suspend_opp = dev_pm_opp_get_suspend_opp(cpu_dev); + if (suspend_opp) + policy->suspend_freq = dev_pm_opp_get_freq(suspend_opp) / 1000; + ret = cpufreq_table_validate_and_show(policy, freq_table); if (ret) { dev_err(cpu_dev, "%s: invalid frequency table: %d\n", __func__, @@ -409,6 +415,31 @@ static void cpufreq_ready(struct cpufreq_policy *policy) of_node_put(np); } +#ifdef CONFIG_PM +static int cpufreq_dt_suspend(struct cpufreq_policy *policy) +{ + int ret; + + if (!policy->suspend_freq) { + pr_debug("%s: suspend_freq not defined\n", __func__); + return 0; + } + + pr_debug("%s: Setting suspend-freq: %u\n", __func__, + policy->suspend_freq); + + ret = __cpufreq_driver_target(policy, policy->suspend_freq, + CPUFREQ_RELATION_H); + if (ret) + pr_err("%s: unable to set suspend-freq: %u. err: %d\n", + __func__, policy->suspend_freq, ret); + + return ret; +} +#else +#define cpufreq_dt_suspend NULL +#endif + static struct cpufreq_driver dt_cpufreq_driver = { .flags = CPUFREQ_STICKY | CPUFREQ_NEED_INITIAL_FREQ_CHECK, .verify = cpufreq_generic_frequency_table_verify, @@ -419,6 +450,7 @@ static struct cpufreq_driver dt_cpufreq_driver = { .ready = cpufreq_ready, .name = "cpufreq-dt", .attr = cpufreq_dt_attr, + .suspend = cpufreq_dt_suspend, }; static int dt_cpufreq_probe(struct platform_device *pdev) -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
