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>
diff --git a/drivers/i2c/busses/i2c-sirf.c b/drivers/i2c/busses/i2c-sirf.c
index ff47a76..efb51a1 100644
--- a/drivers/i2c/busses/i2c-sirf.c
+++ b/drivers/i2c/busses/i2c-sirf.c
@@ -422,6 +422,8 @@
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);