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cpu/rpx0xx: initialize USB PLL and ADC clock

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Signed-off-by: Dylan Laduranty <dylan.laduranty@mesotic.com>
This commit is contained in:
Dylan Laduranty 2023-04-25 21:06:34 +02:00
parent 80e3f57205
commit 9c5e508d2f
3 changed files with 29 additions and 0 deletions
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14
cpu/rpx0xx/clock.c
View File

@ -177,3 +177,17 @@ void clock_gpout3_configure(uint32_t f_in, uint32_t f_out, CLOCKS_CLK_GPOUT3_CTR
io_reg_atomic_set(&PADS_BANK0->GPIO25, 1U << PADS_BANK0_GPIO25_IE_Pos);
gpio_set_function_select(25, FUNCTION_SELECT_CLOCK);
}
void clock_adc_configure(CLOCKS_CLK_ADC_CTRL_AUXSRC_Enum aux)
{
/* Stop the clock generator */
io_reg_atomic_clear(&CLOCKS->CLK_ADC_CTRL,
(1u << CLOCKS_CLK_ADC_CTRL_ENABLE_Pos));
/* Selects the new auxiliary clock source */
io_reg_write_dont_corrupt(&CLOCKS->CLK_ADC_CTRL,
aux << CLOCKS_CLK_ADC_CTRL_AUXSRC_Pos,
CLOCKS_CLK_ADC_CTRL_AUXSRC_Msk);
/* Restart the clock generator */
io_reg_atomic_set(&CLOCKS->CLK_ADC_CTRL,
(1u << CLOCKS_CLK_ADC_CTRL_ENABLE_Pos));
}

8
cpu/rpx0xx/cpu.c
View File

@ -41,6 +41,7 @@ static void _cpu_reset(void)
| RESETS_RESET_pll_usb_Msk
| RESETS_RESET_pll_sys_Msk
| RESETS_RESET_pads_qspi_Msk
| RESETS_RESET_pads_bank0_Msk
| RESETS_RESET_io_qspi_Msk);
periph_reset(rst);
/* Assert that reset has completed except for those components which
@ -78,6 +79,13 @@ static void _cpu_reset(void)
clock_gpout0_configure(CLOCK_XOSC, CLOCK_XOSC,
CLOCKS_CLK_GPOUT0_CTRL_AUXSRC_clk_ref);
}
/* Configure USB PLL to deliver 48MHz needed by ADC */
if (IS_USED(MODULE_PERIPH_ADC)) {
pll_start_usb(PLL_USB_REF_DIV, PLL_USB_VCO_FEEDBACK_SCALE,
PLL_USB_POSTDIV1, PLL_USB_POSTDIV2);
clock_adc_configure(CLOCKS_CLK_ADC_CTRL_AUXSRC_clksrc_pll_usb);
}
}
void cpu_init(void)

7
cpu/rpx0xx/include/periph_cpu.h
View File

@ -613,6 +613,13 @@ void clock_gpout2_configure(uint32_t f_in, uint32_t f_out, CLOCKS_CLK_GPOUT2_CTR
*/
void clock_gpout3_configure(uint32_t f_in, uint32_t f_out, CLOCKS_CLK_GPOUT3_CTRL_AUXSRC_Enum aux);
/**
* @brief Configure the ADC clock to run from a dedicated auxiliary
* clock source
*
* @param aux Auxiliary clock source
*/
void clock_adc_configure(CLOCKS_CLK_ADC_CTRL_AUXSRC_Enum aux);
/** @} */
/**