From mboxrd@z Thu Jan 1 00:00:00 1970 From: Krzysztof Kozlowski Subject: [PATCH v6 2/4] amba: Add helper macros for (un)preparing AMBA clock Date: Mon, 22 Sep 2014 11:46:27 +0200 Message-ID: <1411379189-3017-3-git-send-email-k.kozlowski@samsung.com> References: <1411379189-3017-1-git-send-email-k.kozlowski@samsung.com> Return-path: In-reply-to: <1411379189-3017-1-git-send-email-k.kozlowski@samsung.com> Sender: linux-doc-owner@vger.kernel.org To: Russell King , Dan Williams , Vinod Koul , linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org, Ulf Hansson , Grant Likely , Lars-Peter Clausen , Michal Simek , "Rafael J. Wysocki" , Len Brown , Pavel Machek , Randy Dunlap , Alan Stern , linux-doc@vger.kernel.org, linux-pm@vger.kernel.org Cc: Kyungmin Park , Marek Szyprowski , Bartlomiej Zolnierkiewicz , Krzysztof Kozlowski List-Id: linux-pm@vger.kernel.org Add amba_pclk_prepare() and amba_pclk_unprepare() macros for handling the AMBA bus clock by device drivers. Signed-off-by: Krzysztof Kozlowski --- include/linux/amba/bus.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/include/linux/amba/bus.h b/include/linux/amba/bus.h index fdd7e1b61f60..ad52027a9cbf 100644 --- a/include/linux/amba/bus.h +++ b/include/linux/amba/bus.h @@ -92,6 +92,12 @@ void amba_release_regions(struct amba_device *); #define amba_pclk_disable(d) \ do { if (!IS_ERR((d)->pclk)) clk_disable((d)->pclk); } while (0) +#define amba_pclk_prepare(d) \ + (IS_ERR((d)->pclk) ? 0 : clk_prepare((d)->pclk)) + +#define amba_pclk_unprepare(d) \ + do { if (!IS_ERR((d)->pclk)) clk_unprepare((d)->pclk); } while (0) + /* Some drivers don't use the struct amba_device */ #define AMBA_CONFIG_BITS(a) (((a) >> 24) & 0xff) #define AMBA_REV_BITS(a) (((a) >> 20) & 0x0f) -- 1.9.1