diff options
| author | Viresh Kumar <viresh.kumar@linaro.org> | 2016-02-09 10:30:38 +0530 |
|---|---|---|
| committer | Alex Shi <alex.shi@linaro.org> | 2016-04-01 13:26:23 +0800 |
| commit | 374312cf8d24adff2f3161e53349d8758614324e (patch) | |
| tree | 5390c82bff5eece47417eb8494ef3a0f1d5d450c /drivers/base/power | |
| parent | d4452ef5398b5671530ee5e88892244869e9b1ae (diff) | |
PM / OPP: Manage device clk
OPP core has got almost everything now to manage device's OPP
transitions, the only thing left is device's clk. Get that as well.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
(cherry picked from commit d54974c2513f487e9e70fbdc79c5da51c53e23da)
Signed-off-by: Alex Shi <alex.shi@linaro.org>
Diffstat (limited to 'drivers/base/power')
| -rw-r--r-- | drivers/base/power/opp/core.c | 15 | ||||
| -rw-r--r-- | drivers/base/power/opp/opp.h | 3 |
2 files changed, 18 insertions, 0 deletions
diff --git a/drivers/base/power/opp/core.c b/drivers/base/power/opp/core.c index c2e06f723668..eb7d648d3f79 100644 --- a/drivers/base/power/opp/core.c +++ b/drivers/base/power/opp/core.c @@ -13,6 +13,7 @@ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt +#include <linux/clk.h> #include <linux/errno.h> #include <linux/err.h> #include <linux/slab.h> @@ -575,6 +576,7 @@ static struct device_opp *_add_device_opp(struct device *dev) struct device_opp *dev_opp; struct device_list_opp *list_dev; struct device_node *np; + int ret; /* Check for existing list for 'dev' first */ dev_opp = _find_device_opp(dev); @@ -612,6 +614,15 @@ static struct device_opp *_add_device_opp(struct device *dev) of_node_put(np); } + /* Find clk for the device */ + dev_opp->clk = clk_get(dev, NULL); + if (IS_ERR(dev_opp->clk)) { + ret = PTR_ERR(dev_opp->clk); + if (ret != -EPROBE_DEFER) + dev_dbg(dev, "%s: Couldn't find clock: %d\n", __func__, + ret); + } + srcu_init_notifier_head(&dev_opp->srcu_head); INIT_LIST_HEAD(&dev_opp->opp_list); @@ -653,6 +664,10 @@ static void _remove_device_opp(struct device_opp *dev_opp) if (!IS_ERR_OR_NULL(dev_opp->regulator)) return; + /* Release clk */ + if (!IS_ERR(dev_opp->clk)) + clk_put(dev_opp->clk); + list_dev = list_first_entry(&dev_opp->dev_list, struct device_list_opp, node); diff --git a/drivers/base/power/opp/opp.h b/drivers/base/power/opp/opp.h index d982c61f4f21..d8e3999fbb2c 100644 --- a/drivers/base/power/opp/opp.h +++ b/drivers/base/power/opp/opp.h @@ -22,6 +22,7 @@ #include <linux/rcupdate.h> #include <linux/limits.h> +struct clk; struct regulator; /* Lock to allow exclusive modification to the device and opp lists */ @@ -122,6 +123,7 @@ struct device_list_opp { * @supported_hw: Array of version number to support. * @supported_hw_count: Number of elements in supported_hw array. * @prop_name: A name to postfix to many DT properties, while parsing them. + * @clk: Device's clock handle * @regulator: Supply regulator * @dentry: debugfs dentry pointer of the real device directory (not links). * @dentry_name: Name of the real dentry. @@ -156,6 +158,7 @@ struct device_opp { unsigned int *supported_hw; unsigned int supported_hw_count; const char *prop_name; + struct clk *clk; struct regulator *regulator; }; |