diff options
author | Jon Hunter <jonathanh@nvidia.com> | 2016-06-21 13:33:25 +0300 |
---|---|---|
committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-06-28 01:42:10 +0300 |
commit | 498b5fdd40dd3881a3119d11bff8441cfd902850 (patch) | |
tree | a6741c5aa077d5d392a5c94470c1c9774dc43524 /drivers/base | |
parent | 29b968b2af7782fe879190cd43c10261506ebc11 (diff) | |
download | linux-498b5fdd40dd3881a3119d11bff8441cfd902850.tar.xz |
PM / clk: Add support for adding a specific clock from device-tree
Some drivers using the PM clocks framework need to add specific clocks
from device-tree using a name by calling the functions
of_clk_get_by_name() and then pm_clk_add_clk(). Rather than having
drivers call both functions, add a helper function of_pm_clk_add_clk()
that will call these functions so drivers can call a single function
to add a specific clock from device-tree.
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/base')
-rw-r--r-- | drivers/base/power/clock_ops.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/base/power/clock_ops.c b/drivers/base/power/clock_ops.c index 761f5c21f9f0..8e2e4757adcb 100644 --- a/drivers/base/power/clock_ops.c +++ b/drivers/base/power/clock_ops.c @@ -141,6 +141,38 @@ EXPORT_SYMBOL_GPL(pm_clk_add_clk); /** + * of_pm_clk_add_clk - Start using a device clock for power management. + * @dev: Device whose clock is going to be used for power management. + * @name: Name of clock that is going to be used for power management. + * + * Add the clock described in the 'clocks' device-tree node that matches + * with the 'name' provided, to the list of clocks used for the power + * management of @dev. On success, returns 0. Returns a negative error + * code if the clock is not found or cannot be added. + */ +int of_pm_clk_add_clk(struct device *dev, const char *name) +{ + struct clk *clk; + int ret; + + if (!dev || !dev->of_node || !name) + return -EINVAL; + + clk = of_clk_get_by_name(dev->of_node, name); + if (IS_ERR(clk)) + return PTR_ERR(clk); + + ret = pm_clk_add_clk(dev, clk); + if (ret) { + clk_put(clk); + return ret; + } + + return 0; +} +EXPORT_SYMBOL_GPL(of_pm_clk_add_clk); + +/** * of_pm_clk_add_clks - Start using device clock(s) for power management. * @dev: Device whose clock(s) is going to be used for power management. * |