[PATCH V3 2/3] clk: add managed version of clk_bulk_get
From: aisheng.dong@nxp.com (Dong Aisheng)
Date: 2017-05-19 13:50:08
Also in:
linux-clk, lkml
Subsystem:
clk api, common clk framework, the rest · Maintainers:
Russell King, Michael Turquette, Stephen Boyd, Linus Torvalds
This patch introduces the managed version of clk_bulk_get. Cc: Michael Turquette <mturquette@baylibre.com> Cc: Stephen Boyd <redacted> Cc: Russell King <redacted> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: "Rafael J. Wysocki" <redacted> Cc: Viresh Kumar <viresh.kumar@linaro.org> Cc: Mark Brown <broonie@kernel.org> Cc: Shawn Guo <shawnguo@kernel.org> Cc: Fabio Estevam <redacted> Cc: Sascha Hauer <kernel@pengutronix.de> Cc: Anson Huang <redacted> Cc: Robin Gong <redacted> Cc: Bai Ping <ping.bai@nxp.com> Cc: Leonard Crestez <redacted> Cc: Octavian Purdila <redacted> Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com> --- ChangeLog: v2->v3: no changes v1->v2: only one minor comment change --- drivers/clk/clk-devres.c | 36 ++++++++++++++++++++++++++++++++++++ include/linux/clk.h | 21 +++++++++++++++++++++ 2 files changed, 57 insertions(+)
diff --git a/drivers/clk/clk-devres.c b/drivers/clk/clk-devres.c
index 3a218c3..d854e26 100644
--- a/drivers/clk/clk-devres.c
+++ b/drivers/clk/clk-devres.c@@ -34,6 +34,42 @@ struct clk *devm_clk_get(struct device *dev, const char *id) } EXPORT_SYMBOL(devm_clk_get); +struct clk_bulk_devres { + struct clk_bulk_data *clks; + int num_clks; +}; + +static void devm_clk_bulk_release(struct device *dev, void *res) +{ + struct clk_bulk_devres *devres = res; + + clk_bulk_put(devres->num_clks, devres->clks); +} + +int __must_check devm_clk_bulk_get(struct device *dev, int num_clks, + struct clk_bulk_data *clks) +{ + struct clk_bulk_devres *devres; + int ret; + + devres = devres_alloc(devm_clk_bulk_release, + sizeof(*devres), GFP_KERNEL); + if (!devres) + return -ENOMEM; + + ret = clk_bulk_get(dev, num_clks, clks); + if (!ret) { + devres->clks = clks; + devres->num_clks = num_clks; + devres_add(dev, devres); + } else { + devres_free(devres); + } + + return ret; +} +EXPORT_SYMBOL_GPL(devm_clk_bulk_get); + static int devm_clk_match(struct device *dev, void *res, void *data) { struct clk **c = res;
diff --git a/include/linux/clk.h b/include/linux/clk.h
index 1201944..1ebccf3 100644
--- a/include/linux/clk.h
+++ b/include/linux/clk.h@@ -281,6 +281,21 @@ int __must_check clk_bulk_get(struct device *dev, int num_clks, struct clk_bulk_data *clks); /** + * devm_clk_bulk_get - managed get multiple clk consumers + * @dev: device for clock "consumer" + * @num_clks: the number of clk_bulk_data + * @clks: the clk_bulk_data table of consumer + * + * Return 0 on success, an errno on failure. + * + * This helper function allows drivers to get several clk + * consumers in one operation with management, the clks will + * automatically be freed when the device is unbound. + */ +int __must_check devm_clk_bulk_get(struct device *dev, int num_clks, + struct clk_bulk_data *clks); + +/** * devm_clk_get - lookup and obtain a managed reference to a clock producer. * @dev: device for clock "consumer" * @id: clock consumer ID
@@ -550,6 +565,12 @@ static inline struct clk *devm_clk_get(struct device *dev, const char *id) return NULL; } +static inline int devm_clk_bulk_get(struct device *dev, int num_clks, + struct clk_bulk_data *clks) +{ + return 0; +} + static inline struct clk *devm_get_clk_from_child(struct device *dev, struct device_node *np, const char *con_id) {
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2.7.4