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authorZhiwu Song <Zhiwu.Song@csr.com>2013-08-13 17:11:28 +0800
committerWolfram Sang <wsa@the-dreams.de>2013-08-28 11:44:03 +0200
commitebae7dfab001890bc85d473275cc46611501664a (patch)
treef9f12666b12d649cd96b91cc165ebaad53fdb06d /drivers/i2c
parentc984319ad9c54c269493b6bc0517e8c2dfca4456 (diff)
downloadlinux-ebae7dfab001890bc85d473275cc46611501664a.tar.bz2
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>
Diffstat (limited to 'drivers/i2c')
-rw-r--r--drivers/i2c/busses/i2c-sirf.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/i2c/busses/i2c-sirf.c b/drivers/i2c/busses/i2c-sirf.c
index ff47a767f756..efb51a1d97ca 100644
--- a/drivers/i2c/busses/i2c-sirf.c
+++ b/drivers/i2c/busses/i2c-sirf.c
@@ -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);