49 lines
1.5 KiB
Diff
49 lines
1.5 KiB
Diff
|
From 60b8f0ddf1a927ef02141a6610fd52575134f821 Mon Sep 17 00:00:00 2001
|
||
|
|
From: Phil Edworthy <phil.edworthy@renesas.com>
|
||
|
|
Date: Mon, 3 Dec 2018 11:13:09 +0000
|
||
|
|
Subject: [PATCH 2/3] clk: Add (devm_)clk_get_optional() functions
|
||
|
|
|
||
|
|
This adds clk_get_optional() and devm_clk_get_optional() functions to get
|
||
|
|
optional clocks.
|
||
|
|
|
||
|
|
They behave the same as (devm_)clk_get() except where there is no clock
|
||
|
|
producer. In this case, instead of returning -ENOENT, the function
|
||
|
|
returns NULL. This makes error checking simpler and allows
|
||
|
|
clk_prepare_enable, etc to be called on the returned reference
|
||
|
|
without additional checks.
|
||
|
|
|
||
|
|
Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
|
||
|
|
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
|
||
|
|
Cc: Russell King <linux@armlinux.org.uk>
|
||
|
|
[sboyd@kernel.org: Document in devres.txt]
|
||
|
|
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
|
||
|
|
---
|
||
|
|
drivers/clk/clk-devres.c | 11 +++++++++++
|
||
|
|
1 file changed, 11 insertions(+)
|
||
|
|
|
||
|
|
diff --git a/drivers/clk/clk-devres.c b/drivers/clk/clk-devres.c
|
||
|
|
index c9a86156ced8..daa1fc8fba53 100644
|
||
|
|
--- a/drivers/clk/clk-devres.c
|
||
|
|
+++ b/drivers/clk/clk-devres.c
|
||
|
|
@@ -29,6 +29,17 @@ struct clk *devm_clk_get(struct device *dev, const char *id)
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(devm_clk_get);
|
||
|
|
|
||
|
|
+struct clk *devm_clk_get_optional(struct device *dev, const char *id)
|
||
|
|
+{
|
||
|
|
+ struct clk *clk = devm_clk_get(dev, id);
|
||
|
|
+
|
||
|
|
+ if (clk == ERR_PTR(-ENOENT))
|
||
|
|
+ return NULL;
|
||
|
|
+
|
||
|
|
+ return clk;
|
||
|
|
+}
|
||
|
|
+EXPORT_SYMBOL(devm_clk_get_optional);
|
||
|
|
+
|
||
|
|
struct clk_bulk_devres {
|
||
|
|
struct clk_bulk_data *clks;
|
||
|
|
int num_clks;
|
||
|
|
--
|
||
|
|
2.11.0
|
||
|
|
|