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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 e93960d53a1e..14930887c25f 100644 --- a/Documentation/sound/alsa/soc/clocking.txt +++ b/Documentation/sound/alsa/soc/clocking.txt | |||
@@ -2,20 +2,20 @@ Audio Clocking | |||
2 | ============== | 2 | ============== |
3 | 3 | ||
4 | This text describes the audio clocking terms in ASoC and digital audio in | 4 | This text describes the audio clocking terms in ASoC and digital audio in |
5 | general. Note: Audio clocking can be complex ! | 5 | general. Note: Audio clocking can be complex! |
6 | 6 | ||
7 | 7 | ||
8 | Master Clock | 8 | Master Clock |
9 | ------------ | 9 | ------------ |
10 | 10 | ||
11 | Every audio subsystem is driven by a master clock (sometimes refered to as MCLK | 11 | Every audio subsystem is driven by a master clock (sometimes referred to as MCLK |
12 | or SYSCLK). This audio master clock can be derived from a number of sources | 12 | 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 configuarble in that | 16 | Some master clocks (e.g. PLL's 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 at set frequency (i.e. crystals). | 18 | power). Other master clocks are fixed at a set frequency (i.e. crystals). |
19 | 19 | ||
20 | 20 | ||
21 | DAI Clocks | 21 | DAI Clocks |
@@ -44,7 +44,7 @@ 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's 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 wordsize) to save on power. |
46 | 46 | ||
47 | It's also desireable to use the codec (if possible) to drive (or master) the | 47 | It's 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's usually gives more accurate sample rates than the CPU. |
49 | 49 | ||
50 | 50 | ||