From d608c3d9ac818fc0addc884144c7550e03b0fc6f Mon Sep 17 00:00:00 2001 From: Weifeng Voon Date: Fri, 12 Aug 2016 17:02:49 +0300 Subject: i2c: designware: Enable fast mode plus This patch enabled fast mode plus. The fast mode plus and fast speed share the same HCNT and LCNT register. So, the fast mode plus will only run when the HCNT and LCNT value is provided. Else, it will run at fast speed as default. Signed-off-by: Weifeng Voon Signed-off-by: Jarkko Nikula Reviewed-by: Andy Shevchenko Signed-off-by: Wolfram Sang --- drivers/i2c/busses/i2c-designware-core.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) (limited to 'drivers/i2c/busses/i2c-designware-core.c') diff --git a/drivers/i2c/busses/i2c-designware-core.c b/drivers/i2c/busses/i2c-designware-core.c index c6922b806fb7..07edff7a62e3 100644 --- a/drivers/i2c/busses/i2c-designware-core.c +++ b/drivers/i2c/busses/i2c-designware-core.c @@ -347,8 +347,11 @@ int i2c_dw_init(struct dw_i2c_dev *dev) dw_writel(dev, lcnt, DW_IC_SS_SCL_LCNT); dev_dbg(dev->dev, "Standard-mode HCNT:LCNT = %d:%d\n", hcnt, lcnt); - /* Set SCL timing parameters for fast-mode */ - if (dev->fs_hcnt && dev->fs_lcnt) { + /* Set SCL timing parameters for fast-mode or fast-mode plus */ + if ((dev->clk_freq == 1000000) && dev->fp_hcnt && dev->fp_lcnt) { + hcnt = dev->fp_hcnt; + lcnt = dev->fp_lcnt; + } else if (dev->fs_hcnt && dev->fs_lcnt) { hcnt = dev->fs_hcnt; lcnt = dev->fs_lcnt; } else { -- cgit v1.2.3-55-g7522