class AmlA1PllDevice

Defined at line 50 of file ../../src/devices/lib/amlogic/include/soc/aml-a1/a1-hiu.h

Note:

For A1: od = 0, frac_reg_width = 19

frac_max = 1

(frac_reg_width - 2)

out = [ 24M * (m + frac / frac_max) / n ] / ( 1

od)

e.g.

If want set hifi_pll to 1467'648'000 hz,

then we can get m/n = 1467.648M/24M ≈ 61.

Let m = 61, n = 1 firstly.

1. get fractional part.

target_rate * N * frac_max

frac_cal = ROUND_UP(___________________________ - M * frac_max );

24Mhz

then we can get frac_cal = 19923.

2. get final frac.

frac = min(frac_cal, (frac_max - 1))

frac = 19923.

Public Methods

zx_status_t Initialize ()

Initialize `AmlA1PllDevice`.

Defined at line 57 of file ../../src/devices/lib/amlogic/include/soc/aml-a1/a1-hiu.h

const hhi_pll_rate_t * GetRateTable ()

Return correct clock rate table for selected clock.

Defined at line 64 of file ../../src/devices/lib/amlogic/include/soc/aml-a1/a1-hiu.h

size_t GetRateTableSize ()

Return the count of the rate table for the clock.

Defined at line 67 of file ../../src/devices/lib/amlogic/include/soc/aml-a1/a1-hiu.h

std::unique_ptr<AmlMesonPllDevice> Create (fdf::MmioView view, const meson_clk_pll_data_t * data, const cpp20::span<const hhi_pll_rate_t> rates_table)

Defined at line 115 of file ../../src/devices/lib/amlogic/a1-hiu.cc

zx_status_t Enable ()

Enable the selected clock.

Defined at line 63 of file ../../src/devices/lib/amlogic/a1-pll-rates.cc

void Disable ()

Disable the selected clock.

Defined at line 56 of file ../../src/devices/lib/amlogic/a1-pll-rates.cc

zx_status_t SetRate (const uint64_t hz)

Set the rate of the selected clock.

Defined at line 73 of file ../../src/devices/lib/amlogic/a1-pll-rates.cc

Protected Methods

void AmlA1PllDevice (fdf::MmioView view, const meson_clk_pll_data_t * data, const cpp20::span<const hhi_pll_rate_t> rates_table)

Defined at line 79 of file ../../src/devices/lib/amlogic/include/soc/aml-a1/a1-hiu.h