diff options
Diffstat (limited to 'arch/arm/mach-tegra/tegra20/clock.c')
| -rw-r--r-- | arch/arm/mach-tegra/tegra20/clock.c | 97 |
1 files changed, 75 insertions, 22 deletions
diff --git a/arch/arm/mach-tegra/tegra20/clock.c b/arch/arm/mach-tegra/tegra20/clock.c index cd9fb9a553..ec04cf5261 100644 --- a/arch/arm/mach-tegra/tegra20/clock.c +++ b/arch/arm/mach-tegra/tegra20/clock.c @@ -413,46 +413,78 @@ u32 *get_periph_source_reg(enum periph_id periph_id) return &clkrst->crc_clk_src[internal_id]; } -/** - * Given a peripheral ID and the required source clock, this returns which - * value should be programmed into the source mux for that peripheral. - * - * There is special code here to handle the one source type with 5 sources. - * - * @param periph_id peripheral to start - * @param source PLL id of required parent clock - * @param mux_bits Set to number of bits in mux register: 2 or 4 - * @param divider_bits Set to number of divider bits (8 or 16) - * @return mux value (0-4, or -1 if not found) - */ -int get_periph_clock_source(enum periph_id periph_id, - enum clock_id parent, int *mux_bits, int *divider_bits) +int get_periph_clock_info(enum periph_id periph_id, int *mux_bits, + int *divider_bits, int *type) { - enum clock_type_id type; enum periphc_internal_id internal_id; - int mux; - assert(clock_periph_id_isvalid(periph_id)); + if (!clock_periph_id_isvalid(periph_id)) + return -1; internal_id = periph_id_to_internal_id[periph_id]; - assert(periphc_internal_id_isvalid(internal_id)); + if (!periphc_internal_id_isvalid(internal_id)) + return -1; - type = clock_periph_type[internal_id]; - assert(clock_type_id_isvalid(type)); + *type = clock_periph_type[internal_id]; + if (!clock_type_id_isvalid(*type)) + return -1; /* * Special cases here for the clock with a 4-bit source mux and I2C * with its 16-bit divisor */ - if (type == CLOCK_TYPE_PCXTS) + if (*type == CLOCK_TYPE_PCXTS) *mux_bits = MASK_BITS_31_28; else *mux_bits = MASK_BITS_31_30; - if (type == CLOCK_TYPE_PCMT16) + if (*type == CLOCK_TYPE_PCMT16) *divider_bits = 16; else *divider_bits = 8; + return 0; +} + +enum clock_id get_periph_clock_id(enum periph_id periph_id, int source) +{ + enum periphc_internal_id internal_id; + int type; + + if (!clock_periph_id_isvalid(periph_id)) + return CLOCK_ID_NONE; + + internal_id = periph_id_to_internal_id[periph_id]; + if (!periphc_internal_id_isvalid(internal_id)) + return CLOCK_ID_NONE; + + type = clock_periph_type[internal_id]; + if (!clock_type_id_isvalid(type)) + return CLOCK_ID_NONE; + + return clock_source[type][source]; +} + +/** + * Given a peripheral ID and the required source clock, this returns which + * value should be programmed into the source mux for that peripheral. + * + * There is special code here to handle the one source type with 5 sources. + * + * @param periph_id peripheral to start + * @param source PLL id of required parent clock + * @param mux_bits Set to number of bits in mux register: 2 or 4 + * @param divider_bits Set to number of divider bits (8 or 16) + * @return mux value (0-4, or -1 if not found) + */ +int get_periph_clock_source(enum periph_id periph_id, + enum clock_id parent, int *mux_bits, int *divider_bits) +{ + enum clock_type_id type; + int mux, err; + + err = get_periph_clock_info(periph_id, mux_bits, divider_bits, &type); + assert(!err); + for (mux = 0; mux < CLOCK_MAX_MUX; mux++) if (clock_source[type][mux] == parent) return mux; @@ -717,3 +749,24 @@ int tegra_plle_enable(void) return 0; } + +struct periph_clk_init periph_clk_init_table[] = { + { PERIPH_ID_SPI1, CLOCK_ID_PERIPH }, + { PERIPH_ID_SBC1, CLOCK_ID_PERIPH }, + { PERIPH_ID_SBC2, CLOCK_ID_PERIPH }, + { PERIPH_ID_SBC3, CLOCK_ID_PERIPH }, + { PERIPH_ID_SBC4, CLOCK_ID_PERIPH }, + { PERIPH_ID_HOST1X, CLOCK_ID_PERIPH }, + { PERIPH_ID_DISP1, CLOCK_ID_CGENERAL }, + { PERIPH_ID_NDFLASH, CLOCK_ID_PERIPH }, + { PERIPH_ID_SDMMC1, CLOCK_ID_PERIPH }, + { PERIPH_ID_SDMMC2, CLOCK_ID_PERIPH }, + { PERIPH_ID_SDMMC3, CLOCK_ID_PERIPH }, + { PERIPH_ID_SDMMC4, CLOCK_ID_PERIPH }, + { PERIPH_ID_PWM, CLOCK_ID_SFROM32KHZ }, + { PERIPH_ID_DVC_I2C, CLOCK_ID_PERIPH }, + { PERIPH_ID_I2C1, CLOCK_ID_PERIPH }, + { PERIPH_ID_I2C2, CLOCK_ID_PERIPH }, + { PERIPH_ID_I2C3, CLOCK_ID_PERIPH }, + { -1, }, +}; |