/* Audio init: clocks and enables/resets */
static void setup_audio(void)
{
/* Audio codec (ES755) uses OSC freq (via AUD_MCLK), s/b 38.4MHz */
soc_configure_funits(audio_funit, ARRAY_SIZE(audio_funit));
/*
* As per NVIDIA hardware team, we need to take ALL audio devices
* connected to AHUB (AUDIO, APB2APE, I2S, SPDIF, etc.) out of reset
* and clock-enabled, otherwise reading AHUB devices (in our case,
* I2S/APBIF/AUDIO<XBAR>) will hang.
*/
soc_configure_ape();
clock_enable_audio();
}
/* Audio init: clocks and enables/resets */
static void setup_audio(void)
{
/*
* External peripheral 1: audio codec (max98090) uses 12MHz CLK1
* NOTE: We can't use a funits struct/call here because EXTPERIPH1/2/3
* don't have BASE regs or CAR RST/ENA bits. Also, the mux setting for
* EXTPERIPH1/DAP_MCLK1 is rolled into the I2S1 padcfg.
*/
clock_configure_source(extperiph1, CLK_M, 12000);
soc_configure_funits(audio_funit, ARRAY_SIZE(audio_funit));
clock_external_output(1); /* For external MAX98090 audio codec. */
/*
* Confirmed by NVIDIA hardware team, we need to take ALL audio devices
* connected to AHUB (AUDIO, APBIF, I2S, DAM, AMX, ADX, SPDIF, AFC) out
* of reset and clock-enabled, otherwise reading AHUB devices (in our
* case, I2S/APBIF/AUDIO<XBAR>) will hang.
*/
clock_enable_audio();
}
/* Audio init: clocks and enables/resets */
static void setup_audio(void)
{
/* Audio codec (RT5677) uses 12MHz CLK1/EXTPERIPH1 */
clock_configure_source(extperiph1, PLLP, 12000);
/* Configure AUD_MCLK pad drive strength */
write32((unsigned int *)TEGRA_APB_MISC_GP_BASE + 0xF4,
(0x10 << PINGROUP_DRVUP_SHIFT | 0x10 << PINGROUP_DRVDN_SHIFT));
/* Set up audio peripheral clocks/muxes */
soc_configure_funits(audio_funit, ARRAY_SIZE(audio_funit));
/* Enable CLK1_OUT */
clock_external_output(1);
/*
* As per NVIDIA hardware team, we need to take ALL audio devices
* connected to AHUB (AUDIO, APB2APE, I2S, SPDIF, etc.) out of reset
* and clock-enabled, otherwise reading AHUB devices (in our case,
* I2S/APBIF/AUDIO<XBAR>) will hang.
*/
soc_configure_ape();
clock_enable_audio();
}
