linux-kernel - [PATCH 3/4] dmaengine: stm32-dmamux: use reset controller only at probe time

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Date:   Tue, 28 Jan 2020 10:41:57 +0100
From:   Amelie Delaunay <amelie.delaunay@...com>
To:     Vinod Koul <vkoul@...nel.org>,
        Dan Williams <dan.j.williams@...el.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...com>
CC:     <dmaengine@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        Amelie Delaunay <amelie.delaunay@...com>,
        Pierre-Yves MORDRET <pierre-yves.mordret@...com>
Subject: [PATCH 3/4] dmaengine: stm32-dmamux: use reset controller only at probe time

From: Etienne Carriere <etienne.carriere@...com>

Remove reset controller reference from device instance since it is
used only at probe time.

Signed-off-by: Etienne Carriere <etienne.carriere@...com>
Signed-off-by: Amelie Delaunay <amelie.delaunay@...com>
---
 drivers/dma/stm32-dmamux.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/dma/stm32-dmamux.c b/drivers/dma/stm32-dmamux.c
index a862d3339fb7..1dfecbac64cf 100644
--- a/drivers/dma/stm32-dmamux.c
+++ b/drivers/dma/stm32-dmamux.c
@@ -35,7 +35,6 @@ struct stm32_dmamux {
 struct stm32_dmamux_data {
 	struct dma_router dmarouter;
 	struct clk *clk;
-	struct reset_control *rst;
 	void __iomem *iomem;
 	u32 dma_requests; /* Number of DMA requests connected to DMAMUX */
 	u32 dmamux_requests; /* Number of DMA requests routed toward DMAs */
@@ -182,6 +181,7 @@ static int stm32_dmamux_probe(struct platform_device *pdev)
 	struct stm32_dmamux_data *stm32_dmamux;
 	struct resource *res;
 	void __iomem *iomem;
+	struct reset_control *rst;
 	int i, count, ret;
 	u32 dma_req;
 
@@ -265,11 +265,11 @@ static int stm32_dmamux_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	stm32_dmamux->rst = devm_reset_control_get(&pdev->dev, NULL);
-	if (!IS_ERR(stm32_dmamux->rst)) {
-		reset_control_assert(stm32_dmamux->rst);
+	rst = devm_reset_control_get(&pdev->dev, NULL);
+	if (!IS_ERR(rst)) {
+		reset_control_assert(rst);
 		udelay(2);
-		reset_control_deassert(stm32_dmamux->rst);
+		reset_control_deassert(rst);
 	}
 
 	stm32_dmamux->iomem = iomem;
-- 
2.17.1