From mboxrd@z Thu Jan 1 00:00:00 1970 From: Barry Song <21cnbao-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> Subject: [PATCH 2/5] i2c: sirf: we need to wait I2C_RESET status in resume Date: Tue, 13 Aug 2013 17:11:28 +0800 Message-ID: <1376385091-30597-3-git-send-email-Baohua.Song@csr.com> References: <1376385091-30597-1-git-send-email-Baohua.Song@csr.com> Return-path: In-Reply-To: <1376385091-30597-1-git-send-email-Baohua.Song-kQvG35nSl+M@public.gmane.org> Sender: linux-i2c-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: wsa-z923LK4zBo2bacvFa/9K2g@public.gmane.org, linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Cc: workgroup.linux-kQvG35nSl+M@public.gmane.org, Zhiwu Song , Barry Song List-Id: linux-i2c@vger.kernel.org From: Zhiwu Song this fixes the issue that we lost to wait the i2c reset finished. Signed-off-by: Zhiwu Song Signed-off-by: Barry Song --- drivers/i2c/busses/i2c-sirf.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/i2c/busses/i2c-sirf.c b/drivers/i2c/busses/i2c-sirf.c index 055210e..45a8881 100644 --- a/drivers/i2c/busses/i2c-sirf.c +++ b/drivers/i2c/busses/i2c-sirf.c @@ -425,6 +425,8 @@ static int i2c_sirfsoc_resume(struct device *dev) clk_enable(siic->clk); writel(SIRFSOC_I2C_RESET, siic->base + SIRFSOC_I2C_CTRL); + while (readl(siic->base + SIRFSOC_I2C_CTRL) & SIRFSOC_I2C_RESET) + cpu_relax(); writel(SIRFSOC_I2C_CORE_EN | SIRFSOC_I2C_MASTER_MODE, siic->base + SIRFSOC_I2C_CTRL); writel(siic->clk_div, siic->base + SIRFSOC_I2C_CLK_CTRL); -- 1.8.2.3