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authorLinus Torvalds <torvalds@linux-foundation.org>2012-01-09 14:44:15 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-01-09 14:44:15 -0800
commit979ecef5b89a8003902299566d9cdc08de34a3ee (patch)
tree2a695d557adab1dec5263f014789f5b59238bac8 /include
parente8cbce976050a9f874a8b07012ddeb9b9eb59603 (diff)
parent8c3b2296f1aa13d7504d2c09bc819cef3759562a (diff)
Merge tag 'clk' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
clock management changes for i.MX Another simple series related to clock management, this time only for imx. * tag 'clk' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: ARM: mxs: select HAVE_CLK_PREPARE for clock clk: add config option HAVE_CLK_PREPARE into Kconfig ASoC: mxs-saif: convert to clk_prepare/clk_unprepare video: mxsfb: convert to clk_prepare/clk_unprepare serial: mxs-auart: convert to clk_prepare/clk_unprepare net: flexcan: convert to clk_prepare/clk_unprepare mtd: gpmi-lib: convert to clk_prepare/clk_unprepare mmc: mxs-mmc: convert to clk_prepare/clk_unprepare dma: mxs-dma: convert to clk_prepare/clk_unprepare net: fec: add clk_prepare/clk_unprepare ARM: mxs: convert platform code to clk_prepare/clk_unprepare clk: add helper functions clk_prepare_enable and clk_disable_unprepare Fix up trivial conflicts in drivers/net/ethernet/freescale/fec.c due to commit 0ebafefcaa7a ("net: fec: add clk_prepare/clk_unprepare") clashing trivially with commit e163cc97f9ac ("net/fec: fix the .remove code").
Diffstat (limited to 'include')
-rw-r--r--include/linux/clk.h22
1 files changed, 22 insertions, 0 deletions
diff --git a/include/linux/clk.h b/include/linux/clk.h
index 7213b52b2c0..b9d46fa154b 100644
--- a/include/linux/clk.h
+++ b/include/linux/clk.h
@@ -107,6 +107,28 @@ static inline void clk_unprepare(struct clk *clk)
}
#endif
+/* clk_prepare_enable helps cases using clk_enable in non-atomic context. */
+static inline int clk_prepare_enable(struct clk *clk)
+{
+ int ret;
+
+ ret = clk_prepare(clk);
+ if (ret)
+ return ret;
+ ret = clk_enable(clk);
+ if (ret)
+ clk_unprepare(clk);
+
+ return ret;
+}
+
+/* clk_disable_unprepare helps cases using clk_disable in non-atomic context. */
+static inline void clk_disable_unprepare(struct clk *clk)
+{
+ clk_disable(clk);
+ clk_unprepare(clk);
+}
+
/**
* clk_get_rate - obtain the current clock rate (in Hz) for a clock source.
* This is only valid once the clock source has been enabled.