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Allow a clock divider larger than 255 for the internal i2c bus to the as3525 ascodec.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20861 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Bertrik Sikken 2009-05-06 17:33:56 +00:00
parent 330f9359e2
commit b5886beb81
1 changed files with 5 additions and 2 deletions
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7
firmware/target/arm/as3525/ascodec-as3525.c
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@ -65,12 +65,15 @@ void i2c_init(void)
/* initialises the internal i2c bus and prepares for transfers to the codec */ /* initialises the internal i2c bus and prepares for transfers to the codec */
void ascodec_init(void) void ascodec_init(void)
{ {
int prescaler;
/* enable clock */ /* enable clock */
CGU_PERI |= CGU_I2C_AUDIO_MASTER_CLOCK_ENABLE; CGU_PERI |= CGU_I2C_AUDIO_MASTER_CLOCK_ENABLE;
/* prescaler for i2c clock */ /* prescaler for i2c clock */
I2C2_CPSR0 = CLK_DIV(AS3525_PCLK_FREQ, AS3525_I2C_FREQ); prescaler = CLK_DIV(AS3525_PCLK_FREQ, AS3525_I2C_FREQ);
I2C2_CPSR1 = 0; /* MSB */ I2C2_CPSR0 = prescaler & 0xFF;
I2C2_CPSR1 = (prescaler >> 8) & 0xFF;
/* set i2c slave address of codec part */ /* set i2c slave address of codec part */
I2C2_SLAD0 = AS3514_I2C_ADDR << 1; I2C2_SLAD0 = AS3514_I2C_ADDR << 1;