diff options
| -rw-r--r-- | drivers/clk/tegra/clk-tegra114.c | 37 | ||||
| -rw-r--r-- | drivers/clk/tegra/clk.h | 2 |
2 files changed, 39 insertions, 0 deletions
diff --git a/drivers/clk/tegra/clk-tegra114.c b/drivers/clk/tegra/clk-tegra114.c index ccfff33e00b7..fdf14c1abd14 100644 --- a/drivers/clk/tegra/clk-tegra114.c +++ b/drivers/clk/tegra/clk-tegra114.c @@ -29,6 +29,7 @@ #define RST_DEVICES_L 0x004 #define RST_DEVICES_H 0x008 #define RST_DEVICES_U 0x00C +#define RST_DFLL_DVCO 0x2F4 #define RST_DEVICES_V 0x358 #define RST_DEVICES_W 0x35C #define RST_DEVICES_X 0x28C @@ -47,6 +48,9 @@ #define CPU_FINETRIM_R 0x4e4 /* rise->rise prop dly inc A */ #define RST_DEVICES_NUM 5 +/* RST_DFLL_DVCO bitfields */ +#define DVFS_DFLL_RESET_SHIFT 0 + /* CPU_FINETRIM_SELECT and CPU_FINETRIM_DR bitfields */ #define CPU_FINETRIM_1_FCPU_1 BIT(0) /* fcpu0 */ #define CPU_FINETRIM_1_FCPU_2 BIT(1) /* fcpu1 */ @@ -2248,6 +2252,39 @@ void tegra114_clock_tune_cpu_trimmers_init(void) } EXPORT_SYMBOL(tegra114_clock_tune_cpu_trimmers_init); +/** + * tegra114_clock_assert_dfll_dvco_reset - assert the DFLL's DVCO reset + * + * Assert the reset line of the DFLL's DVCO. No return value. + */ +void tegra114_clock_assert_dfll_dvco_reset(void) +{ + u32 v; + + v = readl_relaxed(clk_base + RST_DFLL_DVCO); + v |= (1 << DVFS_DFLL_RESET_SHIFT); + writel_relaxed(v, clk_base + RST_DFLL_DVCO); + tegra114_car_barrier(); +} +EXPORT_SYMBOL(tegra114_clock_assert_dfll_dvco_reset); + +/** + * tegra114_clock_deassert_dfll_dvco_reset - deassert the DFLL's DVCO reset + * + * Deassert the reset line of the DFLL's DVCO, allowing the DVCO to + * operate. No return value. + */ +void tegra114_clock_deassert_dfll_dvco_reset(void) +{ + u32 v; + + v = readl_relaxed(clk_base + RST_DFLL_DVCO); + v &= ~(1 << DVFS_DFLL_RESET_SHIFT); + writel_relaxed(v, clk_base + RST_DFLL_DVCO); + tegra114_car_barrier(); +} +EXPORT_SYMBOL(tegra114_clock_deassert_dfll_dvco_reset); + static void __init tegra114_clock_init(struct device_node *np) { struct device_node *node; diff --git a/drivers/clk/tegra/clk.h b/drivers/clk/tegra/clk.h index 554814c67825..07cfacd91686 100644 --- a/drivers/clk/tegra/clk.h +++ b/drivers/clk/tegra/clk.h @@ -590,6 +590,8 @@ void tegra_init_dup_clks(struct tegra_clk_duplicate *dup_list, void tegra114_clock_tune_cpu_trimmers_high(void); void tegra114_clock_tune_cpu_trimmers_low(void); void tegra114_clock_tune_cpu_trimmers_init(void); +void tegra114_clock_assert_dfll_dvco_reset(void); +void tegra114_clock_deassert_dfll_dvco_reset(void); typedef void (*tegra_clk_apply_init_table_func)(void); extern tegra_clk_apply_init_table_func tegra_clk_apply_init_table; |