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Commit b7ce0b5d authored by Alexander Shiyan's avatar Alexander Shiyan Committed by Greg Kroah-Hartman
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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: default avatarAlexander Shiyan <shc_work@mail.ru>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent b0dceb6a

drivers/w1/masters/mxc_w1.c

+5 −0
Original line number Diff line number Diff line
@@ -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;