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Date: Mon, 2 Feb 2015 15:37:04 +0200 From: Heikki Krogerus <heikki.krogerus@...ux.intel.com> To: Mike Turquette <mturquette@...aro.org> Cc: Stephen Boyd <sboyd@...eaurora.org>, linux-kernel@...r.kernel.org Subject: [PATCH] clk: fractional-divider: support for divider bypassing If the divider or multiplier values values are 0 in the register, bypassing the divider and returning the parent clock rate in clk_fd_recalc_rate(). Signed-off-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com> --- drivers/clk/clk-fractional-divider.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/clk/clk-fractional-divider.c b/drivers/clk/clk-fractional-divider.c index dc91da7..34d6c51 100644 --- a/drivers/clk/clk-fractional-divider.c +++ b/drivers/clk/clk-fractional-divider.c @@ -36,6 +36,9 @@ static unsigned long clk_fd_recalc_rate(struct clk_hw *hw, m = (val & fd->mmask) >> fd->mshift; n = (val & fd->nmask) >> fd->nshift; + if (!n || !m) + return parent_rate; + ret = (u64)parent_rate * m; do_div(ret, n); -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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