This function will be used by Tegra30 CPUIDLE driver to determine whether CPU could be power-gated.
Signed-off-by: Dmitry Osipenko <[email protected]> --- drivers/clk/tegra/clk-tegra20-emc.c | 14 ++++++++++++++ include/linux/clk/tegra.h | 1 + 2 files changed, 15 insertions(+) diff --git a/drivers/clk/tegra/clk-tegra20-emc.c b/drivers/clk/tegra/clk-tegra20-emc.c index 03bf0009a33c..ace7150d5cc1 100644 --- a/drivers/clk/tegra/clk-tegra20-emc.c +++ b/drivers/clk/tegra/clk-tegra20-emc.c @@ -291,3 +291,17 @@ int tegra20_clk_prepare_emc_mc_same_freq(struct clk *emc_clk, bool same) return 0; } + +bool tegra20_clk_emc_on_pllp(void) +{ + struct clk *clk = __clk_lookup("emc"); + struct clk_hw *hw; + + if (clk) { + hw = __clk_get_hw(clk); + + return emc_get_parent(hw) == EMC_SRC_PLL_P; + } + + return true; +} diff --git a/include/linux/clk/tegra.h b/include/linux/clk/tegra.h index 6a7cbc3cfadc..c862447ffada 100644 --- a/include/linux/clk/tegra.h +++ b/include/linux/clk/tegra.h @@ -129,5 +129,6 @@ typedef long (tegra20_clk_emc_round_cb)(unsigned long rate, void tegra20_clk_set_emc_round_callback(tegra20_clk_emc_round_cb *round_cb, void *cb_arg); int tegra20_clk_prepare_emc_mc_same_freq(struct clk *emc_clk, bool same); +bool tegra20_clk_emc_on_pllp(void); #endif /* __LINUX_CLK_TEGRA_H_ */ -- 2.22.0
