31.07.2019 3:20, Sowjanya Komatineni пишет: > This patch implements context restore for clock divider. > > During system suspend, core power goes off and looses the settings > of the Tegra CAR controller registers. > > So on resume, clock dividers are restored back for normal operation. > > Signed-off-by: Sowjanya Komatineni <[email protected]> > --- > drivers/clk/tegra/clk-divider.c | 11 +++++++++++ > 1 file changed, 11 insertions(+) > > diff --git a/drivers/clk/tegra/clk-divider.c b/drivers/clk/tegra/clk-divider.c > index e76731fb7d69..ca0de5f11f84 100644 > --- a/drivers/clk/tegra/clk-divider.c > +++ b/drivers/clk/tegra/clk-divider.c > @@ -109,10 +109,21 @@ static int clk_frac_div_set_rate(struct clk_hw *hw, > unsigned long rate, > return 0; > } > > +static void clk_divider_restore_context(struct clk_hw *hw) > +{ > + struct clk_hw *parent = clk_hw_get_parent(hw); > + unsigned long parent_rate = clk_hw_get_rate(parent); > + unsigned long rate = clk_hw_get_rate(hw); > + > + if (clk_frac_div_set_rate(hw, rate, parent_rate) < 0) > + WARN_ON(1); > +} > + > const struct clk_ops tegra_clk_frac_div_ops = { > .recalc_rate = clk_frac_div_recalc_rate, > .set_rate = clk_frac_div_set_rate, > .round_rate = clk_frac_div_round_rate, > + .restore_context = clk_divider_restore_context, > }; > > struct clk *tegra_clk_register_divider(const char *name, >
Reviewed-by: Dmitry Osipenko <[email protected]>
