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From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Viresh Kumar <vireshk@kernel.org>, Vinod Koul <vkoul@kernel.org>
Subject: [PATCH v1 3/3] dmaengine: dw: Simplify DT property parser
Date: Mon,  2 Aug 2021 21:43:55 +0300	[thread overview]
Message-ID: <20210802184355.49879-3-andriy.shevchenko@linux.intel.com> (raw)
In-Reply-To: <20210802184355.49879-1-andriy.shevchenko@linux.intel.com>

Since we converted internal data types to match DT, there is no need to have
an intermediate conversion layer, hence drop a few conditionals and for loops
for good.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/dma/dw/of.c | 44 ++++++++++++++++----------------------------
 1 file changed, 16 insertions(+), 28 deletions(-)

diff --git a/drivers/dma/dw/of.c b/drivers/dma/dw/of.c
index 4d2b89142721..523ca806837c 100644
--- a/drivers/dma/dw/of.c
+++ b/drivers/dma/dw/of.c
@@ -50,7 +50,7 @@ struct dw_dma_platform_data *dw_dma_parse_dt(struct platform_device *pdev)
 {
 	struct device_node *np = pdev->dev.of_node;
 	struct dw_dma_platform_data *pdata;
-	u32 tmp, arr[DW_DMA_MAX_NR_MASTERS], mb[DW_DMA_MAX_NR_CHANNELS];
+	u32 tmp, arr[DW_DMA_MAX_NR_MASTERS];
 	u32 nr_masters;
 	u32 nr_channels;
 
@@ -71,41 +71,29 @@ struct dw_dma_platform_data *dw_dma_parse_dt(struct platform_device *pdev)
 	pdata->nr_masters = nr_masters;
 	pdata->nr_channels = nr_channels;
 
-	if (!of_property_read_u32(np, "chan_allocation_order", &tmp))
-		pdata->chan_allocation_order = (unsigned char)tmp;
+	of_property_read_u32(np, "chan_allocation_order", &pdata->chan_allocation_order);
+	of_property_read_u32(np, "chan_priority", &pdata->chan_priority);
 
-	if (!of_property_read_u32(np, "chan_priority", &tmp))
-		pdata->chan_priority = tmp;
+	of_property_read_u32(np, "block_size", &pdata->block_size);
 
-	if (!of_property_read_u32(np, "block_size", &tmp))
-		pdata->block_size = tmp;
-
-	if (!of_property_read_u32_array(np, "data-width", arr, nr_masters)) {
-		for (tmp = 0; tmp < nr_masters; tmp++)
-			pdata->data_width[tmp] = arr[tmp];
-	} else if (!of_property_read_u32_array(np, "data_width", arr, nr_masters)) {
+	/* Try deprecated property first */
+	if (!of_property_read_u32_array(np, "data_width", arr, nr_masters)) {
 		for (tmp = 0; tmp < nr_masters; tmp++)
 			pdata->data_width[tmp] = BIT(arr[tmp] & 0x07);
 	}
 
-	if (!of_property_read_u32_array(np, "multi-block", mb, nr_channels)) {
-		for (tmp = 0; tmp < nr_channels; tmp++)
-			pdata->multi_block[tmp] = mb[tmp];
-	} else {
-		for (tmp = 0; tmp < nr_channels; tmp++)
-			pdata->multi_block[tmp] = 1;
-	}
+	/* If "data_width" and "data-width" both provided use the latter one */
+	of_property_read_u32_array(np, "data-width", pdata->data_width, nr_masters);
 
-	if (of_property_read_u32_array(np, "snps,max-burst-len", pdata->max_burst,
-				       nr_channels)) {
-		memset32(pdata->max_burst, DW_DMA_MAX_BURST, nr_channels);
-	}
+	memset32(pdata->multi_block, 1, nr_channels);
+	of_property_read_u32_array(np, "multi-block", pdata->multi_block, nr_channels);
 
-	if (!of_property_read_u32(np, "snps,dma-protection-control", &tmp)) {
-		if (tmp > CHAN_PROTCTL_MASK)
-			return NULL;
-		pdata->protctl = tmp;
-	}
+	memset32(pdata->max_burst, DW_DMA_MAX_BURST, nr_channels);
+	of_property_read_u32_array(np, "snps,max-burst-len", pdata->max_burst, nr_channels);
+
+	of_property_read_u32(np, "snps,dma-protection-control", &pdata->protctl);
+	if (pdata->protctl > CHAN_PROTCTL_MASK)
+		return NULL;
 
 	return pdata;
 }
-- 
2.30.2


  parent reply	other threads:[~2021-08-02 18:43 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-02 18:43 [PATCH v1 1/3] dmaengine: dw: Remove error message from DT parsing code Andy Shevchenko
2021-08-02 18:43 ` [PATCH v1 2/3] dmaengine: dw: Convert members to u32 in platform data Andy Shevchenko
2021-08-02 18:43 ` Andy Shevchenko [this message]
2021-08-04  9:46 ` [PATCH v1 1/3] dmaengine: dw: Remove error message from DT parsing code Serge Semin
2021-08-04 11:03   ` Andy Shevchenko
2021-08-06 13:49 ` Vinod Koul

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