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soc: rt10xx: add flexspi clock functions

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Add SOC specific function to set the flexspi clock divider and get the
flexspi clock frequency.

Signed-off-by: Jeppe Odgaard <jeppe.odgaard@prevas.dk>
This commit is contained in:
Jeppe Odgaard 2023-01-18 15:19:27 +01:00 • committed by Carles Cufí
commit eed2de8c03
3 changed files with 62 additions and 0 deletions
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5
soc/arm/nxp_imx/rt/CMakeLists.txt
View file

@ -29,6 +29,11 @@ if(CONFIG_PM)
zephyr_sources_ifdef(CONFIG_SOC_SERIES_IMX_RT11XX power_rt11xx.c)
endif()
if (CONFIG_FLASH_MCUX_FLEXSPI_XIP AND CONFIG_SOC_SERIES_IMX_RT10XX AND CONFIG_MEMC)
zephyr_sources(flexspi_rt10xx.c)
zephyr_code_relocate(FILES flexspi_rt10xx.c LOCATION ITCM_TEXT)
endif ()
if (CONFIG_PM AND CONFIG_SOC_SERIES_IMX_RT10XX)
zephyr_sources(power_rt10xx.c)
zephyr_code_relocate(FILES power_rt10xx.c LOCATION ITCM_TEXT)

54
soc/arm/nxp_imx/rt/flexspi_rt10xx.c Normal file
View file

@ -0,0 +1,54 @@
/*
* Copyright (c) 2023, NXP
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <fsl_clock.h>
#include <soc.h>
/* reimplementation of non-inline CLOCK_GetFreq(kCLOCK_Usb1PllPfd0Clk) */
static uint32_t clock_get_usb1_pll_pfd0_clk(void)
{
uint32_t freq;
if (!CLOCK_IsPllEnabled(CCM_ANALOG, kCLOCK_PllUsb1)) {
return 0;
}
freq = CLOCK_GetPllBypassRefClk(CCM_ANALOG, kCLOCK_PllUsb1);
if (CLOCK_IsPllBypassed(CCM_ANALOG, kCLOCK_PllUsb1)) {
return freq;
}
freq *= ((CCM_ANALOG->PLL_USB1 & CCM_ANALOG_PLL_USB1_DIV_SELECT_MASK) != 0) ? 22 : 20;
/* get current USB1 PLL PFD output frequency */
freq /= (CCM_ANALOG->PFD_480 & CCM_ANALOG_PFD_480_PFD0_FRAC_MASK) >>
CCM_ANALOG_PFD_480_PFD0_FRAC_SHIFT;
freq *= 18;
return freq;
}
void flexspi_clock_set_div(uint32_t value)
{
CLOCK_DisableClock(kCLOCK_FlexSpi);
CLOCK_SetDiv(kCLOCK_FlexspiDiv, value);
CLOCK_EnableClock(kCLOCK_FlexSpi);
}
uint32_t flexspi_clock_get_freq(void)
{
uint32_t divider;
uint32_t frequency;
divider = CLOCK_GetDiv(kCLOCK_FlexspiDiv);
frequency = clock_get_usb1_pll_pfd0_clk() / (divider + 1);
return frequency;
}

3
soc/arm/nxp_imx/rt/soc.h
View file

@ -45,6 +45,9 @@ void imxrt_pre_init_display_interface(void);
void imxrt_post_init_display_interface(void);
#endif
void flexspi_clock_set_div(uint32_t value);
uint32_t flexspi_clock_get_freq(void);
#ifdef __cplusplus
}
#endif