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Message-Id: <1371024947-30782-1-git-send-email-sachin.kamat@linaro.org>
Date: Wed, 12 Jun 2013 13:45:47 +0530
From: Sachin Kamat <sachin.kamat@...aro.org>
To: linux-kernel@...r.kernel.org
Cc: sameo@...ux.intel.com, sachin.kamat@...aro.org,
Miguel Aguilar <miguel.aguilar@...gerun.com>
Subject: [PATCH 1/1] mfd: davinci_voicecodec: Convert to use devm_* APIs
devm_* APIs are device managed and make code simpler.
Signed-off-by: Sachin Kamat <sachin.kamat@...aro.org>
Cc: Miguel Aguilar <miguel.aguilar@...gerun.com>
---
Patch is based on mfd-next tree and compile tested.
This driver gives following compilation error (not introduced by this patch):
drivers/mfd/davinci_voicecodec.c:86:3: error: implicit declaration
of function ‘io_v2p’ [-Werror=implicit-function-declaration]
(dma_addr_t)(io_v2p(davinci_vc->base) + DAVINCI_VC_WFIFO);
In order to test my changes I added the following to davinci_voicecodec.h file:
+#define IO_OFFSET 0xfd000000 /* Virtual IO = 0xfec00000 */
+#define io_v2p(va) ((va) - IO_OFFSET)
I am not sure if these changes are right fix for the above error.
---
drivers/mfd/davinci_voicecodec.c | 48 +++++++-------------------------
include/linux/mfd/davinci_voicecodec.h | 2 --
2 files changed, 10 insertions(+), 40 deletions(-)
diff --git a/drivers/mfd/davinci_voicecodec.c b/drivers/mfd/davinci_voicecodec.c
index b6e2973..fb64398 100644
--- a/drivers/mfd/davinci_voicecodec.c
+++ b/drivers/mfd/davinci_voicecodec.c
@@ -46,7 +46,7 @@ void davinci_vc_write(struct davinci_vc *davinci_vc,
static int __init davinci_vc_probe(struct platform_device *pdev)
{
struct davinci_vc *davinci_vc;
- struct resource *res, *mem;
+ struct resource *res;
struct mfd_cell *cell = NULL;
int ret;
@@ -58,7 +58,7 @@ static int __init davinci_vc_probe(struct platform_device *pdev)
return -ENOMEM;
}
- davinci_vc->clk = clk_get(&pdev->dev, NULL);
+ davinci_vc->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(davinci_vc->clk)) {
dev_dbg(&pdev->dev,
"could not get the clock for voice codec\n");
@@ -67,35 +67,18 @@ static int __init davinci_vc_probe(struct platform_device *pdev)
clk_enable(davinci_vc->clk);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res) {
- dev_err(&pdev->dev, "no mem resource\n");
- ret = -ENODEV;
- goto fail2;
- }
-
- davinci_vc->pbase = res->start;
- davinci_vc->base_size = resource_size(res);
- mem = request_mem_region(davinci_vc->pbase, davinci_vc->base_size,
- pdev->name);
- if (!mem) {
- dev_err(&pdev->dev, "VCIF region already claimed\n");
- ret = -EBUSY;
- goto fail2;
- }
-
- davinci_vc->base = ioremap(davinci_vc->pbase, davinci_vc->base_size);
- if (!davinci_vc->base) {
- dev_err(&pdev->dev, "can't ioremap mem resource.\n");
- ret = -ENOMEM;
- goto fail3;
+ davinci_vc->base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(davinci_vc->base)) {
+ ret = PTR_ERR(davinci_vc->base);
+ goto fail;
}
res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
if (!res) {
dev_err(&pdev->dev, "no DMA resource\n");
ret = -ENXIO;
- goto fail4;
+ goto fail;
}
davinci_vc->davinci_vcif.dma_tx_channel = res->start;
@@ -106,7 +89,7 @@ static int __init davinci_vc_probe(struct platform_device *pdev)
if (!res) {
dev_err(&pdev->dev, "no DMA resource\n");
ret = -ENXIO;
- goto fail4;
+ goto fail;
}
davinci_vc->davinci_vcif.dma_rx_channel = res->start;
@@ -132,19 +115,13 @@ static int __init davinci_vc_probe(struct platform_device *pdev)
DAVINCI_VC_CELLS, NULL, 0, NULL);
if (ret != 0) {
dev_err(&pdev->dev, "fail to register client devices\n");
- goto fail4;
+ goto fail;
}
return 0;
-fail4:
- iounmap(davinci_vc->base);
-fail3:
- release_mem_region(davinci_vc->pbase, davinci_vc->base_size);
-fail2:
+fail:
clk_disable(davinci_vc->clk);
- clk_put(davinci_vc->clk);
- davinci_vc->clk = NULL;
return ret;
}
@@ -155,12 +132,7 @@ static int davinci_vc_remove(struct platform_device *pdev)
mfd_remove_devices(&pdev->dev);
- iounmap(davinci_vc->base);
- release_mem_region(davinci_vc->pbase, davinci_vc->base_size);
-
clk_disable(davinci_vc->clk);
- clk_put(davinci_vc->clk);
- davinci_vc->clk = NULL;
return 0;
}
diff --git a/include/linux/mfd/davinci_voicecodec.h b/include/linux/mfd/davinci_voicecodec.h
index 0ab6132..94c53d4 100644
--- a/include/linux/mfd/davinci_voicecodec.h
+++ b/include/linux/mfd/davinci_voicecodec.h
@@ -112,8 +112,6 @@ struct davinci_vc {
/* Memory resources */
void __iomem *base;
- resource_size_t pbase;
- size_t base_size;
/* MFD cells */
struct mfd_cell cells[DAVINCI_VC_CELLS];
--
1.7.9.5
--
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