From: Julia Lawall <julia.law...@lip6.fr> Clk_prepare_enable and clk_disable_unprepare combine clk_prepare and clk_enable, and clk_disable and clk_unprepare. They make the code more concise, and ensure that clk_unprepare is called when clk_enable fails.
A simplified version of the semantic patch that introduces calls to these functions is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ expression e; @@ - clk_prepare(e); - clk_enable(e); + clk_prepare_enable(e); @@ expression e; @@ - clk_disable(e); - clk_unprepare(e); + clk_disable_unprepare(e); // </smpl> Signed-off-by: Julia Lawall <julia.law...@lip6.fr> --- arch/arm/common/sa1111.c | 3 +-- arch/arm/common/timer-sp.c | 16 ++++------------ arch/arm/kernel/smp_twd.c | 13 +++---------- 3 files changed, 8 insertions(+), 24 deletions(-) diff --git a/arch/arm/common/sa1111.c b/arch/arm/common/sa1111.c index 9173d11..bd58414 100644 --- a/arch/arm/common/sa1111.c +++ b/arch/arm/common/sa1111.c @@ -834,8 +834,7 @@ static void __sa1111_remove(struct sa1111 *sachip) sa1111_writel(0, irqbase + SA1111_WAKEEN0); sa1111_writel(0, irqbase + SA1111_WAKEEN1); - clk_disable(sachip->clk); - clk_unprepare(sachip->clk); + clk_disable_unprepare(sachip->clk); if (sachip->irq != NO_IRQ) { irq_set_chained_handler(sachip->irq, NULL); diff --git a/arch/arm/common/timer-sp.c b/arch/arm/common/timer-sp.c index df13a3f..af1a4ab 100644 --- a/arch/arm/common/timer-sp.c +++ b/arch/arm/common/timer-sp.c @@ -42,17 +42,10 @@ static long __init sp804_get_clock_rate(const char *name) return PTR_ERR(clk); } - err = clk_prepare(clk); + err = clk_prepare_enable(clk); if (err) { - pr_err("sp804: %s clock failed to prepare: %d\n", name, err); - clk_put(clk); - return err; - } - - err = clk_enable(clk); - if (err) { - pr_err("sp804: %s clock failed to enable: %d\n", name, err); - clk_unprepare(clk); + pr_err("sp804: %s clock failed to prepare or to enable: %d\n", + name, err); clk_put(clk); return err; } @@ -60,8 +53,7 @@ static long __init sp804_get_clock_rate(const char *name) rate = clk_get_rate(clk); if (rate < 0) { pr_err("sp804: %s clock failed to get rate: %ld\n", name, rate); - clk_disable(clk); - clk_unprepare(clk); + clk_disable_unprepare(clk); clk_put(clk); } diff --git a/arch/arm/kernel/smp_twd.c b/arch/arm/kernel/smp_twd.c index fef42b2..8c94b8b 100644 --- a/arch/arm/kernel/smp_twd.c +++ b/arch/arm/kernel/smp_twd.c @@ -204,17 +204,10 @@ static struct clk *twd_get_clock(void) return clk; } - err = clk_prepare(clk); + err = clk_prepare_enable(clk); if (err) { - pr_err("smp_twd: clock failed to prepare: %d\n", err); - clk_put(clk); - return ERR_PTR(err); - } - - err = clk_enable(clk); - if (err) { - pr_err("smp_twd: clock failed to enable: %d\n", err); - clk_unprepare(clk); + pr_err("smp_twd: clock failed to prepare or to enable: %d\n", + err); clk_put(clk); return ERR_PTR(err); } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
