09.08.2019 20:39, Sowjanya Komatineni пишет: > > On 8/9/19 4:33 AM, Dmitry Osipenko wrote: >> 09.08.2019 2:46, Sowjanya Komatineni пишет: >>> This patch implements save and restore of PLL context. >>> >>> During system suspend, core power goes off and looses the settings >>> of the Tegra CAR controller registers. >>> >>> So during suspend entry pll context is stored and on resume it is >>> restored back along with its state. >>> >>> Acked-by: Thierry Reding <treding@xxxxxxxxxx> >>> Signed-off-by: Sowjanya Komatineni <skomatineni@xxxxxxxxxx> >>> --- >>> drivers/clk/tegra/clk-pll.c | 88 ++++++++++++++++++++++++++++----------------- >>> drivers/clk/tegra/clk.h | 2 ++ >>> 2 files changed, 58 insertions(+), 32 deletions(-) >>> >>> diff --git a/drivers/clk/tegra/clk-pll.c b/drivers/clk/tegra/clk-pll.c >>> index 1583f5fc992f..e52add2bbdbb 100644 >>> --- a/drivers/clk/tegra/clk-pll.c >>> +++ b/drivers/clk/tegra/clk-pll.c >>> @@ -1008,6 +1008,28 @@ static unsigned long clk_plle_recalc_rate(struct clk_hw *hw, >>> return rate; >>> } >>> +static void tegra_clk_pll_restore_context(struct clk_hw *hw) >>> +{ >>> + struct tegra_clk_pll *pll = to_clk_pll(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); >>> + u32 val; >>> + >>> + if (clk_pll_is_enabled(hw)) >>> + return; >>> + >>> + if (pll->params->set_defaults) >>> + pll->params->set_defaults(pll); >>> + >>> + clk_pll_set_rate(hw, rate, parent_rate); >>> + >>> + if (!__clk_get_enable_count(hw->clk)) >> What about orphaned clocks? Is enable_count > 0 for them? > There are no orphaned pll clocks. Sorry, I meant the "clk_ignore_unused".