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i2c: sirf: we need to wait I2C_RESET status in resume 

this fixes the issue that we lost to wait the i2c reset finished.

Signed-off-by: Zhiwu Song <Zhiwu.Song@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Zhiwu Song 2013-08-13 17:11:28 +08:00 committed by Wolfram Sang
parent c984319ad9
commit ebae7dfab0
1 changed files with 2 additions and 0 deletions
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2
drivers/i2c/busses/i2c-sirf.c
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@ -422,6 +422,8 @@ 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);