From ab5f299f51259fd2466cf35c89d79bd960e0fc32 Mon Sep 17 00:00:00 2001 From: MyungJoo Ham Date: Fri, 16 Mar 2012 21:54:53 +0100 Subject: PM / devfreq: add relation of recommended frequency. The semantics of "target frequency" given to devfreq driver from devfreq framework has always been interpretted as "at least" or GLB (greatest lower bound). However, the framework might want the device driver to limit its max frequency (LUB: least upper bound), especially if it is given by thermal framework (it's too hot). Thus, the target fuction should have another parameter to express whether the framework wants GLB or LUB. And, the additional parameter, "u32 flags", does it. With the update, devfreq_recommended_opp() is also updated. Signed-off-by: MyungJoo Ham Signed-off-by: Kyungmin Park Reviewed-by: Mike Turquette Signed-off-by: Rafael J. Wysocki --- drivers/devfreq/exynos4_bus.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) (limited to 'drivers/devfreq/exynos4_bus.c') diff --git a/drivers/devfreq/exynos4_bus.c b/drivers/devfreq/exynos4_bus.c index 590d6865e388..1a361e99965a 100644 --- a/drivers/devfreq/exynos4_bus.c +++ b/drivers/devfreq/exynos4_bus.c @@ -619,13 +619,19 @@ static int exynos4_bus_setvolt(struct busfreq_data *data, struct opp *opp, return err; } -static int exynos4_bus_target(struct device *dev, unsigned long *_freq) +static int exynos4_bus_target(struct device *dev, unsigned long *_freq, + u32 flags) { int err = 0; - struct busfreq_data *data = dev_get_drvdata(dev); - struct opp *opp = devfreq_recommended_opp(dev, _freq); - unsigned long old_freq = opp_get_freq(data->curr_opp); + struct platform_device *pdev = container_of(dev, struct platform_device, + dev); + struct busfreq_data *data = platform_get_drvdata(pdev); + struct opp *opp = devfreq_recommended_opp(dev, _freq, flags); unsigned long freq = opp_get_freq(opp); + unsigned long old_freq = opp_get_freq(data->curr_opp); + + if (IS_ERR(opp)) + return PTR_ERR(opp); if (old_freq == freq) return 0; -- cgit v1.2.3