diff options
Diffstat (limited to 'arch/arm/include/asm/arch-tegra/clock.h')
-rw-r--r-- | arch/arm/include/asm/arch-tegra/clock.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/arch/arm/include/asm/arch-tegra/clock.h b/arch/arm/include/asm/arch-tegra/clock.h index 7daf8bc..388afcb 100644 --- a/arch/arm/include/asm/arch-tegra/clock.h +++ b/arch/arm/include/asm/arch-tegra/clock.h @@ -187,6 +187,16 @@ void clock_ll_set_source_divisor(enum periph_id periph_id, unsigned source, unsigned divisor); /** + * Returns the current parent clock ID of a given peripheral. This can be + * useful in order to call clock_*_periph_*() from generic code that has no + * specific knowledge of system-level clock tree structure. + * + * @param periph_id peripheral to query + * @return clock ID of the peripheral's current parent clock + */ +enum clock_id clock_get_periph_parent(enum periph_id periph_id); + +/** * Start a peripheral PLL clock at the given rate. This also resets the * peripheral. * @@ -284,6 +294,36 @@ u32 *get_periph_source_reg(enum periph_id periph_id); /* Returns a pointer to the given 'simple' PLL */ struct clk_pll_simple *clock_get_simple_pll(enum clock_id clkid); +/* + * Given a peripheral ID, determine where the mux bits are in the peripheral + * clock's register, the number of divider bits the clock has, and the SoC- + * specific clock type. + * + * This is an internal API between the core Tegra clock code and the SoC- + * specific clock code. + * + * @param periph_id peripheral to query + * @param mux_bits Set to number of bits in mux register + * @param divider_bits Set to the relevant MASK_BITS_* value + * @param type Set to the SoC-specific clock type + * @return 0 on success, -1 on error + */ +int get_periph_clock_info(enum periph_id periph_id, int *mux_bits, + int *divider_bits, int *type); + +/* + * Given a peripheral ID and clock source mux value, determine the clock_id + * of that peripheral's parent. + * + * This is an internal API between the core Tegra clock code and the SoC- + * specific clock code. + * + * @param periph_id peripheral to query + * @param source raw clock source mux value + * @return the CLOCK_ID_* value @source represents + */ +enum clock_id get_periph_clock_id(enum periph_id periph_id, int source); + /** * Given a peripheral ID and the required source clock, this returns which * value should be programmed into the source mux for that peripheral. @@ -362,6 +402,12 @@ struct clk_pll_info { }; extern struct clk_pll_info tegra_pll_info_table[CLOCK_ID_PLL_COUNT]; +struct periph_clk_init { + enum periph_id periph_id; + enum clock_id parent_clock_id; +}; +extern struct periph_clk_init periph_clk_init_table[]; + /** * Enable output clock for external peripherals * |