diff --git a/drivers/clk/tegra/clk-tegra114.c b/drivers/clk/tegra/clk-tegra114.c index 5d5a22d529f5..1824f014202b 100644 --- a/drivers/clk/tegra/clk-tegra114.c +++ b/drivers/clk/tegra/clk-tegra114.c @@ -1367,7 +1367,7 @@ static void __init tegra114_clock_init(struct device_node *np) tegra_super_clk_gen4_init(clk_base, pmc_base, tegra114_clks, &pll_x_params); - tegra_add_of_provider(np); + tegra_add_of_provider(np, of_clk_src_onecell_get); tegra_register_devclks(devclks, ARRAY_SIZE(devclks)); tegra_clk_apply_init_table = tegra114_clock_apply_init_table; diff --git a/drivers/clk/tegra/clk-tegra124.c b/drivers/clk/tegra/clk-tegra124.c index 50088e976611..0c69c7970950 100644 --- a/drivers/clk/tegra/clk-tegra124.c +++ b/drivers/clk/tegra/clk-tegra124.c @@ -1479,7 +1479,7 @@ static void __init tegra124_132_clock_init_post(struct device_node *np) &pll_x_params); tegra_init_special_resets(1, tegra124_reset_assert, tegra124_reset_deassert); - tegra_add_of_provider(np); + tegra_add_of_provider(np, of_clk_src_onecell_get); clks[TEGRA124_CLK_EMC] = tegra_clk_register_emc(clk_base, np, &emc_lock); diff --git a/drivers/clk/tegra/clk-tegra20.c b/drivers/clk/tegra/clk-tegra20.c index 636500a98561..cc857d4d4a86 100644 --- a/drivers/clk/tegra/clk-tegra20.c +++ b/drivers/clk/tegra/clk-tegra20.c @@ -1089,6 +1089,36 @@ static const struct of_device_id pmc_match[] __initconst = { { }, }; +static struct clk *tegra20_clk_src_onecell_get(struct of_phandle_args *clkspec, + void *data) +{ + struct clk_hw *parent_hw; + struct clk_hw *hw; + struct clk *clk; + + clk = of_clk_src_onecell_get(clkspec, data); + if (IS_ERR(clk)) + return clk; + + /* + * Tegra20 CDEV1 and CDEV2 clocks are a bit special case, their parent + * clock is created by the pinctrl driver. It is possible for clk user + * to request these clocks before pinctrl driver got probed and hence + * user will get an orphaned clock. That might be undesirable because + * user may expect parent clock to be enabled by the child. + */ + if (clkspec->args[0] == TEGRA20_CLK_CDEV1 || + clkspec->args[0] == TEGRA20_CLK_CDEV2) { + hw = __clk_get_hw(clk); + + parent_hw = clk_hw_get_parent(hw); + if (!parent_hw) + return ERR_PTR(-EPROBE_DEFER); + } + + return clk; +} + static void __init tegra20_clock_init(struct device_node *np) { struct device_node *node; @@ -1127,7 +1157,7 @@ static void __init tegra20_clock_init(struct device_node *np) tegra_init_dup_clks(tegra_clk_duplicates, clks, TEGRA20_CLK_CLK_MAX); - tegra_add_of_provider(np); + tegra_add_of_provider(np, tegra20_clk_src_onecell_get); tegra_register_devclks(devclks, ARRAY_SIZE(devclks)); tegra_clk_apply_init_table = tegra20_clock_apply_init_table; diff --git a/drivers/clk/tegra/clk-tegra210.c b/drivers/clk/tegra/clk-tegra210.c index 9fb5d51ccce4..5435d01c636a 100644 --- a/drivers/clk/tegra/clk-tegra210.c +++ b/drivers/clk/tegra/clk-tegra210.c @@ -3567,7 +3567,7 @@ static void __init tegra210_clock_init(struct device_node *np) tegra_init_special_resets(2, tegra210_reset_assert, tegra210_reset_deassert); - tegra_add_of_provider(np); + tegra_add_of_provider(np, of_clk_src_onecell_get); tegra_register_devclks(devclks, ARRAY_SIZE(devclks)); tegra210_mbist_clk_init(); diff --git a/drivers/clk/tegra/clk-tegra30.c b/drivers/clk/tegra/clk-tegra30.c index b316dfb6f6c7..acfe661b2ae7 100644 --- a/drivers/clk/tegra/clk-tegra30.c +++ b/drivers/clk/tegra/clk-tegra30.c @@ -1349,7 +1349,7 @@ static void __init tegra30_clock_init(struct device_node *np) tegra_init_dup_clks(tegra_clk_duplicates, clks, TEGRA30_CLK_CLK_MAX); - tegra_add_of_provider(np); + tegra_add_of_provider(np, of_clk_src_onecell_get); tegra_register_devclks(devclks, ARRAY_SIZE(devclks)); tegra_clk_apply_init_table = tegra30_clock_apply_init_table; diff --git a/drivers/clk/tegra/clk.c b/drivers/clk/tegra/clk.c index ba923f0d5953..593d76a114f9 100644 --- a/drivers/clk/tegra/clk.c +++ b/drivers/clk/tegra/clk.c @@ -298,7 +298,8 @@ static struct reset_controller_dev rst_ctlr = { .of_reset_n_cells = 1, }; -void __init tegra_add_of_provider(struct device_node *np) +void __init tegra_add_of_provider(struct device_node *np, + void *clk_src_onecell_get) { int i; @@ -314,7 +315,7 @@ void __init tegra_add_of_provider(struct device_node *np) clk_data.clks = clks; clk_data.clk_num = clk_num; - of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data); + of_clk_add_provider(np, clk_src_onecell_get, &clk_data); rst_ctlr.of_node = np; rst_ctlr.nr_resets = periph_banks * 32 + num_special_reset; diff --git a/drivers/clk/tegra/clk.h b/drivers/clk/tegra/clk.h index ba7e20e6a82b..e1f88463b600 100644 --- a/drivers/clk/tegra/clk.h +++ b/drivers/clk/tegra/clk.h @@ -763,7 +763,7 @@ struct clk **tegra_clk_init(void __iomem *clk_base, int num, int periph_banks); struct clk **tegra_lookup_dt_id(int clk_id, struct tegra_clk *tegra_clk); -void tegra_add_of_provider(struct device_node *np); +void tegra_add_of_provider(struct device_node *np, void *clk_src_onecell_get); void tegra_register_devclks(struct tegra_devclk *dev_clks, int num); void tegra_audio_clk_init(void __iomem *clk_base,