Patchwork [2/2,V2] mtd: fsmc_nand: Add clk_{un}prepare() support

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Submitter Viresh KUMAR
Date April 17, 2012, 11:37 a.m.
Message ID <0e30cc60464d6052706b96a020700ecbf2121d71.1334662614.git.viresh.kumar@st.com>
Download mbox | patch
Permalink /patch/153138/
State New
Headers show

Comments

Viresh KUMAR - April 17, 2012, 11:37 a.m.
clk_{un}prepare is mandatory for platforms using common clock framework. Since
this driver is used by SPEAr platform, which supports common clock framework,
add clk_{un}prepare() support for it.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
---
V1->V2:
- Use clk_prepare_enable and clk_disable_unprepare

 drivers/mtd/nand/fsmc_nand.c |   14 +++++++-------
 1 files changed, 7 insertions(+), 7 deletions(-)
Linus Walleij - April 17, 2012, 6:21 p.m.
On Tue, Apr 17, 2012 at 1:37 PM, Viresh Kumar <viresh.kumar@st.com> wrote:

> clk_{un}prepare is mandatory for platforms using common clock framework. Since
> this driver is used by SPEAr platform, which supports common clock framework,
> add clk_{un}prepare() support for it.
>
> Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
> ---
> V1->V2:
> - Use clk_prepare_enable and clk_disable_unprepare

Even smarter.
Acked-by: Linus Walleij <linus.walleij@linaro.org>

Linus Walleij

Patch

diff --git a/drivers/mtd/nand/fsmc_nand.c b/drivers/mtd/nand/fsmc_nand.c
index 1b8330e..9d7f417 100644
--- a/drivers/mtd/nand/fsmc_nand.c
+++ b/drivers/mtd/nand/fsmc_nand.c
@@ -994,9 +994,9 @@  static int __init fsmc_nand_probe(struct platform_device *pdev)
 		return PTR_ERR(host->clk);
 	}
 
-	ret = clk_enable(host->clk);
+	ret = clk_prepare_enable(host->clk);
 	if (ret)
-		goto err_clk_enable;
+		goto err_clk_prepare_enable;
 
 	/*
 	 * This device ID is actually a common AMBA ID as used on the
@@ -1176,8 +1176,8 @@  err_req_write_chnl:
 	if (host->mode == USE_DMA_ACCESS)
 		dma_release_channel(host->read_dma_chan);
 err_req_read_chnl:
-	clk_disable(host->clk);
-err_clk_enable:
+	clk_disable_unprepare(host->clk);
+err_clk_prepare_enable:
 	clk_put(host->clk);
 	return ret;
 }
@@ -1198,7 +1198,7 @@  static int fsmc_nand_remove(struct platform_device *pdev)
 			dma_release_channel(host->write_dma_chan);
 			dma_release_channel(host->read_dma_chan);
 		}
-		clk_disable(host->clk);
+		clk_disable_unprepare(host->clk);
 		clk_put(host->clk);
 	}
 
@@ -1210,7 +1210,7 @@  static int fsmc_nand_suspend(struct device *dev)
 {
 	struct fsmc_nand_data *host = dev_get_drvdata(dev);
 	if (host)
-		clk_disable(host->clk);
+		clk_disable_unprepare(host->clk);
 	return 0;
 }
 
@@ -1218,7 +1218,7 @@  static int fsmc_nand_resume(struct device *dev)
 {
 	struct fsmc_nand_data *host = dev_get_drvdata(dev);
 	if (host) {
-		clk_enable(host->clk);
+		clk_prepare_enable(host->clk);
 		fsmc_nand_setup(host->regs_va, host->bank,
 				host->nand.options & NAND_BUSWIDTH_16,
 				host->dev_timings);