[PATCH 3/4] w1: mxc_w1: Perform a software reset at startup

[Alexander Shiyan]

This patch adds a software reset for 1-Wire module at driver startup.

Signed-off-by: Alexander Shiyan <shc_work@xxxxxxx>
---
 drivers/w1/masters/mxc_w1.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/w1/masters/mxc_w1.c b/drivers/w1/masters/mxc_w1.c
index 0d05abe..741d2bb4 100644
--- a/drivers/w1/masters/mxc_w1.c
+++ b/drivers/w1/masters/mxc_w1.c
@@ -32,6 +32,7 @@
 # define MXC_W1_CONTROL_RPP	BIT(7)
 #define MXC_W1_TIME_DIVIDER	0x02
 #define MXC_W1_RESET		0x04
+# define MXC_W1_RESET_RST	BIT(0)
 
 struct mxc_w1_device {
 	void __iomem *regs;
@@ -129,6 +130,10 @@ static int mxc_w1_probe(struct platform_device *pdev)
 	if (err)
 		return err;
 
+	/* Software reset 1-Wire module */
+	writeb(MXC_W1_RESET_RST, mdev->regs + MXC_W1_RESET);
+	writeb(0, mdev->regs + MXC_W1_RESET);
+
 	writeb(clkdiv - 1, mdev->regs + MXC_W1_TIME_DIVIDER);
 
 	mdev->bus_master.data = mdev;
-- 
1.8.3.2

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