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AMS v1/v2: Fix I2C2_CSPR debug menu entry

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I2c controller needs to be enabled in order to read CSPR0, CSPR1
registers function sets CGU_I2C_AUDIO_MASTER_CLOCK_ENABLE
and only clears if it wasn't previously enabled

Use divider set in register to calculate frequency rather than
hard coded divider

Change-Id: I54ecc0c1859e906c00f4c2ae8ae2424a4619df98
This commit is contained in:
William Wilgus 2017-10-30 22:48:50 +01:00
parent 6a568761c8
commit c15af64452
3 changed files with 32 additions and 20 deletions
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15
firmware/target/arm/as3525/ascodec-as3525.c
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@ -675,3 +675,18 @@ void ascodec_init(void)
IFRTC_IRQ_RTC | IRQ_ADC);
#endif
}
void ams_i2c_get_debug_cpsr(unsigned int *i2c_cpsr)
{
int oldlevel = disable_interrupt_save(IRQ_FIQ_STATUS);
/* must be on to read regs */
bool i2c_enabled = bitset32(&CGU_PERI, CGU_I2C_AUDIO_MASTER_CLOCK_ENABLE) &
CGU_I2C_AUDIO_MASTER_CLOCK_ENABLE;
*i2c_cpsr = (I2C2_CPSR1<<8 | I2C2_CPSR0);
if (!i2c_enabled) /* put it back how we found it */
bitclr32(&CGU_PERI, CGU_I2C_AUDIO_MASTER_CLOCK_ENABLE);
restore_irq(oldlevel);
}