23.07.2019 5:52, Dmitry Osipenko пишет: > Unset "enable" bit means that divider is in bypass mode, hence it doesn't > have any effect in that case. Please note that there are no known bugs > caused by the missing check. > > Signed-off-by: Dmitry Osipenko <dig...@gmail.com> > --- > > Changelog: > > v2: Changed the commit's description from 'Fix' to 'Add' in response to the > Stephen's Boyd question about the need to backport the patch into stable > kernels. The backporting is not really needed. > > drivers/clk/tegra/clk-divider.c | 9 +++++++-- > 1 file changed, 7 insertions(+), 2 deletions(-) > > diff --git a/drivers/clk/tegra/clk-divider.c b/drivers/clk/tegra/clk-divider.c > index e76731fb7d69..f33c19045386 100644 > --- a/drivers/clk/tegra/clk-divider.c > +++ b/drivers/clk/tegra/clk-divider.c > @@ -40,8 +40,13 @@ static unsigned long clk_frac_div_recalc_rate(struct > clk_hw *hw, > int div, mul; > u64 rate = parent_rate; > > - reg = readl_relaxed(divider->reg) >> divider->shift; > - div = reg & div_mask(divider); > + reg = readl_relaxed(divider->reg); > + > + if ((divider->flags & TEGRA_DIVIDER_UART) && > + !(reg & PERIPH_CLK_UART_DIV_ENB)) > + return rate; > + > + div = (reg >> divider->shift) & div_mask(divider); > > mul = get_mul(divider); > div += mul; >
Hello Peter, ACK?
