diff options
Diffstat (limited to 'Documentation/sound/alsa/soc/clocking.txt')
-rw-r--r-- | Documentation/sound/alsa/soc/clocking.txt | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/Documentation/sound/alsa/soc/clocking.txt b/Documentation/sound/alsa/soc/clocking.txt index 14930887c25f..b1300162e01c 100644 --- a/Documentation/sound/alsa/soc/clocking.txt +++ b/Documentation/sound/alsa/soc/clocking.txt | |||
@@ -13,7 +13,7 @@ or SYSCLK). This audio master clock can be derived from a number of sources | |||
13 | (e.g. crystal, PLL, CPU clock) and is responsible for producing the correct | 13 | (e.g. crystal, PLL, CPU clock) and is responsible for producing the correct |
14 | audio playback and capture sample rates. | 14 | audio playback and capture sample rates. |
15 | 15 | ||
16 | Some master clocks (e.g. PLL's and CPU based clocks) are configurable in that | 16 | Some master clocks (e.g. PLLs and CPU based clocks) are configurable in that |
17 | their speed can be altered by software (depending on the system use and to save | 17 | their speed can be altered by software (depending on the system use and to save |
18 | power). Other master clocks are fixed at a set frequency (i.e. crystals). | 18 | power). Other master clocks are fixed at a set frequency (i.e. crystals). |
19 | 19 | ||
@@ -41,11 +41,11 @@ BCLK = LRC * x | |||
41 | BCLK = LRC * Channels * Word Size | 41 | BCLK = LRC * Channels * Word Size |
42 | 42 | ||
43 | This relationship depends on the codec or SoC CPU in particular. In general | 43 | This relationship depends on the codec or SoC CPU in particular. In general |
44 | it's best to configure BCLK to the lowest possible speed (depending on your | 44 | it is best to configure BCLK to the lowest possible speed (depending on your |
45 | rate, number of channels and wordsize) to save on power. | 45 | rate, number of channels and word size) to save on power. |
46 | 46 | ||
47 | It's also desirable to use the codec (if possible) to drive (or master) the | 47 | It is also desirable to use the codec (if possible) to drive (or master) the |
48 | audio clocks as it's usually gives more accurate sample rates than the CPU. | 48 | audio clocks as it usually gives more accurate sample rates than the CPU. |
49 | 49 | ||
50 | 50 | ||
51 | 51 | ||