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Big, Blaze: Set I2S1 Source to CLK_M to Fix Beep

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This is a companion patch of CL:191692 "Tegra: Fix Beep".

TEST=Booted Big. Verified beeps at dev screen. Measured frequency by smartphone.
Built Blaze.
BUG=chrome-os-partner:26609
BRANCH=none
Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org>

Change-Id: I9ba47d06202e9968a908c4a15cfbeac4bfe2c20c
Reviewed-on: https://chromium-review.googlesource.com/192063
Reviewed-by: Daisuke Nojiri <dnojiri@chromium.org>
Commit-Queue: Daisuke Nojiri <dnojiri@chromium.org>
Tested-by: Daisuke Nojiri <dnojiri@chromium.org>
This commit is contained in:
Daisuke Nojiri 2014-03-28 09:21:37 -07:00 • committed by chrome-internal-fetch
commit 87a0f166e4
2 changed files with 8 additions and 6 deletions
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7
src/mainboard/google/nyan_big/mainboard.c
View file

@ -53,10 +53,11 @@ static void set_clock_sources(void)
clock_configure_irregular_source(extperiph1, CLK_M, 12000, 3);
/*
* I2S1 can use either PLLP or PLLA. Using PLLP is sufficient now since
* we only need 4.8MHz. Note the source id of PLLP for I2S is 4.
* We need 1.5MHz. So, we use CLK_M. CLK_DIVIDER macro returns a divisor
* (0xe) a little bit off from the ideal value (0xd) but it's good
* enough for beeps. The source id of CLK_M for I2S is 6.
*/
clock_configure_irregular_source(i2s1, PLLP, 4800, 4);
clock_configure_irregular_source(i2s1, CLK_M, 1500, 6);
/* Note source id of PLLP for HOST1x is 4. */
clock_configure_irregular_source(host1x, PLLP, 408000, 4);

7
src/mainboard/google/nyan_blaze/mainboard.c
View file

@ -53,10 +53,11 @@ static void set_clock_sources(void)
clock_configure_irregular_source(extperiph1, CLK_M, 12000, 3);
/*
* I2S1 can use either PLLP or PLLA. Using PLLP is sufficient now since
* we only need 4.8MHz. Note the source id of PLLP for I2S is 4.
* We need 1.5MHz. So, we use CLK_M. CLK_DIVIDER macro returns a divisor
* (0xe) a little bit off from the ideal value (0xd) but it's good
* enough for beeps. The source id of CLK_M for I2S is 6.
*/
clock_configure_irregular_source(i2s1, PLLP, 4800, 4);
clock_configure_irregular_source(i2s1, CLK_M, 1500, 6);
/* Note source id of PLLP for HOST1x is 4. */
clock_configure_irregular_source(host1x, PLLP, 408000, 4);