diff options
Diffstat (limited to 'arch/arm')
-rw-r--r-- | arch/arm/include/asm/arch-tegra/clock.h | 40 | ||||
-rw-r--r-- | arch/arm/mach-tegra/clock.c | 37 | ||||
-rw-r--r-- | arch/arm/mach-tegra/tegra114/clock.c | 64 | ||||
-rw-r--r-- | arch/arm/mach-tegra/tegra124/clock.c | 64 | ||||
-rw-r--r-- | arch/arm/mach-tegra/tegra20/clock.c | 76 | ||||
-rw-r--r-- | arch/arm/mach-tegra/tegra210/clock.c | 64 | ||||
-rw-r--r-- | arch/arm/mach-tegra/tegra30/clock.c | 64 |
7 files changed, 323 insertions, 86 deletions
diff --git a/arch/arm/include/asm/arch-tegra/clock.h b/arch/arm/include/asm/arch-tegra/clock.h index e0737f5..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. diff --git a/arch/arm/mach-tegra/clock.c b/arch/arm/mach-tegra/clock.c index 597f628..cf8bc38 100644 --- a/arch/arm/mach-tegra/clock.c +++ b/arch/arm/mach-tegra/clock.c @@ -206,6 +206,29 @@ int clock_ll_set_source_bits(enum periph_id periph_id, int mux_bits, return 0; } +static int clock_ll_get_source_bits(enum periph_id periph_id, int mux_bits) +{ + u32 *reg = get_periph_source_reg(periph_id); + u32 val = readl(reg); + + switch (mux_bits) { + case MASK_BITS_31_30: + val >>= OUT_CLK_SOURCE_31_30_SHIFT; + val &= OUT_CLK_SOURCE_31_30_MASK; + return val; + case MASK_BITS_31_29: + val >>= OUT_CLK_SOURCE_31_29_SHIFT; + val &= OUT_CLK_SOURCE_31_29_MASK; + return val; + case MASK_BITS_31_28: + val >>= OUT_CLK_SOURCE_31_28_SHIFT; + val &= OUT_CLK_SOURCE_31_28_MASK; + return val; + default: + return -1; + } +} + void clock_ll_set_source(enum periph_id periph_id, unsigned source) { clock_ll_set_source_bits(periph_id, MASK_BITS_31_30, source); @@ -363,6 +386,20 @@ static int adjust_periph_pll(enum periph_id periph_id, int source, return 0; } +enum clock_id clock_get_periph_parent(enum periph_id periph_id) +{ + int err, mux_bits, divider_bits, type; + int source; + + err = get_periph_clock_info(periph_id, &mux_bits, ÷r_bits, &type); + if (err) + return CLOCK_ID_NONE; + + source = clock_ll_get_source_bits(periph_id, mux_bits); + + return get_periph_clock_id(periph_id, source); +} + unsigned clock_adjust_periph_pll_div(enum periph_id periph_id, enum clock_id parent, unsigned rate, int *extra_div) { diff --git a/arch/arm/mach-tegra/tegra114/clock.c b/arch/arm/mach-tegra/tegra114/clock.c index 6620206..177ab6b 100644 --- a/arch/arm/mach-tegra/tegra114/clock.c +++ b/arch/arm/mach-tegra/tegra114/clock.c @@ -496,6 +496,51 @@ u32 *get_periph_source_reg(enum periph_id periph_id) return &clkrst->crc_clk_src[internal_id]; } +int get_periph_clock_info(enum periph_id periph_id, int *mux_bits, + int *divider_bits, int *type) +{ + enum periphc_internal_id internal_id; + + if (!clock_periph_id_isvalid(periph_id)) + return -1; + + internal_id = periph_id_to_internal_id[periph_id]; + if (!periphc_internal_id_isvalid(internal_id)) + return -1; + + *type = clock_periph_type[internal_id]; + if (!clock_type_id_isvalid(*type)) + return -1; + + *mux_bits = clock_source[*type][CLOCK_MAX_MUX]; + + 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. @@ -512,23 +557,10 @@ 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; - enum periphc_internal_id internal_id; - int mux; - - assert(clock_periph_id_isvalid(periph_id)); + int mux, err; - internal_id = periph_id_to_internal_id[periph_id]; - assert(periphc_internal_id_isvalid(internal_id)); - - type = clock_periph_type[internal_id]; - assert(clock_type_id_isvalid(type)); - - *mux_bits = clock_source[type][CLOCK_MAX_MUX]; - - if (type == CLOCK_TYPE_PCMT16) - *divider_bits = 16; - else - *divider_bits = 8; + 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) diff --git a/arch/arm/mach-tegra/tegra124/clock.c b/arch/arm/mach-tegra/tegra124/clock.c index 84b679c..5e44061 100644 --- a/arch/arm/mach-tegra/tegra124/clock.c +++ b/arch/arm/mach-tegra/tegra124/clock.c @@ -642,6 +642,51 @@ u32 *get_periph_source_reg(enum periph_id periph_id) } } +int get_periph_clock_info(enum periph_id periph_id, int *mux_bits, + int *divider_bits, int *type) +{ + enum periphc_internal_id internal_id; + + if (!clock_periph_id_isvalid(periph_id)) + return -1; + + internal_id = periph_id_to_internal_id[periph_id]; + if (!periphc_internal_id_isvalid(internal_id)) + return -1; + + *type = clock_periph_type[internal_id]; + if (!clock_type_id_isvalid(*type)) + return -1; + + *mux_bits = clock_source[*type][CLOCK_MAX_MUX]; + + if (*type == CLOCK_TYPE_PC2CC3M_T16) + *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. @@ -658,23 +703,10 @@ 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; - enum periphc_internal_id internal_id; - int mux; - - assert(clock_periph_id_isvalid(periph_id)); - - internal_id = periph_id_to_internal_id[periph_id]; - assert(periphc_internal_id_isvalid(internal_id)); - - type = clock_periph_type[internal_id]; - assert(clock_type_id_isvalid(type)); + int mux, err; - *mux_bits = clock_source[type][CLOCK_MAX_MUX]; - - if (type == CLOCK_TYPE_PC2CC3M_T16) - *divider_bits = 16; - else - *divider_bits = 8; + 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) diff --git a/arch/arm/mach-tegra/tegra20/clock.c b/arch/arm/mach-tegra/tegra20/clock.c index d11e89b..ec04cf5 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; diff --git a/arch/arm/mach-tegra/tegra210/clock.c b/arch/arm/mach-tegra/tegra210/clock.c index d51c148..c8bb946 100644 --- a/arch/arm/mach-tegra/tegra210/clock.c +++ b/arch/arm/mach-tegra/tegra210/clock.c @@ -732,6 +732,51 @@ u32 *get_periph_source_reg(enum periph_id periph_id) return &clkrst->crc_clk_src_y[internal_id]; } +int get_periph_clock_info(enum periph_id periph_id, int *mux_bits, + int *divider_bits, int *type) +{ + enum periphc_internal_id internal_id; + + if (!clock_periph_id_isvalid(periph_id)) + return -1; + + internal_id = periph_id_to_internal_id[periph_id]; + if (!periphc_internal_id_isvalid(internal_id)) + return -1; + + *type = clock_periph_type[internal_id]; + if (!clock_type_id_isvalid(*type)) + return -1; + + *mux_bits = clock_source[*type][CLOCK_MAX_MUX]; + + if (*type == CLOCK_TYPE_PC2CC3M_T16) + *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. @@ -748,23 +793,10 @@ 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; - enum periphc_internal_id internal_id; - int mux; - - assert(clock_periph_id_isvalid(periph_id)); + int mux, err; - internal_id = INTERNAL_ID(periph_id_to_internal_id[periph_id]); - assert(periphc_internal_id_isvalid(internal_id)); - - type = clock_periph_type[internal_id]; - assert(clock_type_id_isvalid(type)); - - *mux_bits = clock_source[type][CLOCK_MAX_MUX]; - - if (type == CLOCK_TYPE_PC2CC3M_T16) - *divider_bits = 16; - else - *divider_bits = 8; + 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) diff --git a/arch/arm/mach-tegra/tegra30/clock.c b/arch/arm/mach-tegra/tegra30/clock.c index 52a6dce..4fd8b8a 100644 --- a/arch/arm/mach-tegra/tegra30/clock.c +++ b/arch/arm/mach-tegra/tegra30/clock.c @@ -476,6 +476,51 @@ u32 *get_periph_source_reg(enum periph_id periph_id) return &clkrst->crc_clk_src[internal_id]; } +int get_periph_clock_info(enum periph_id periph_id, int *mux_bits, + int *divider_bits, int *type) +{ + enum periphc_internal_id internal_id; + + if (!clock_periph_id_isvalid(periph_id)) + return -1; + + internal_id = periph_id_to_internal_id[periph_id]; + if (!periphc_internal_id_isvalid(internal_id)) + return -1; + + *type = clock_periph_type[internal_id]; + if (!clock_type_id_isvalid(*type)) + return -1; + + *mux_bits = clock_source[*type][CLOCK_MAX_MUX]; + + 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. @@ -492,23 +537,10 @@ 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; - enum periphc_internal_id internal_id; - int mux; - - assert(clock_periph_id_isvalid(periph_id)); - - internal_id = periph_id_to_internal_id[periph_id]; - assert(periphc_internal_id_isvalid(internal_id)); - - type = clock_periph_type[internal_id]; - assert(clock_type_id_isvalid(type)); + int mux, err; - *mux_bits = clock_source[type][CLOCK_MAX_MUX]; - - if (type == CLOCK_TYPE_PCMT16) - *divider_bits = 16; - else - *divider_bits = 8; + 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) |