From b7ce0b5d03f303cba0fff3f9df17f400d4e7a2d8 Mon Sep 17 00:00:00 2001 From: Alexander Shiyan Date: Thu, 8 May 2014 11:56:39 +0400 Subject: w1: mxc_w1: Perform a software reset at startup This patch adds a software reset for 1-Wire module at driver startup. Signed-off-by: Alexander Shiyan Signed-off-by: Greg Kroah-Hartman --- drivers/w1/masters/mxc_w1.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/w1') diff --git a/drivers/w1/masters/mxc_w1.c b/drivers/w1/masters/mxc_w1.c index 0d05abe34362..741d2bb400ae 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; -- cgit v1.2.3