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drivers: display: stm32_ltdc temporary patch for LTDC clock

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LTDC clock on F4/F7 series, is generated from PLLSAI which yet is not
implemented into Zephyr.

Signed-off-by: Konstantinos Papadopoulos <kostas.papadopulos@gmail.com>
This commit is contained in:
Konstantinos Papadopoulos 2022-04-04 20:33:58 +03:00 • committed by Marti Bolivar
commit b8604024f7
1 changed files with 27 additions and 0 deletions
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27
drivers/display/display_stm32_ltdc.c
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@ -9,6 +9,7 @@
#include <string.h> #include <string.h>
#include <device.h> #include <device.h>
#include <devicetree.h> #include <devicetree.h>
#include <stm32_ll_rcc.h>
#include <drivers/display.h> #include <drivers/display.h>
#include <drivers/gpio.h> #include <drivers/gpio.h>
#include <drivers/pinctrl.h> #include <drivers/pinctrl.h>
@ -248,6 +249,32 @@ static int stm32_ltdc_init(const struct device *dev)
return err; return err;
} }
#if defined(CONFIG_SOC_SERIES_STM32F4X)
LL_RCC_PLLSAI_Disable();
LL_RCC_PLLSAI_ConfigDomain_LTDC(LL_RCC_PLLSOURCE_HSE,
LL_RCC_PLLSAIM_DIV_8,
192,
LL_RCC_PLLSAIR_DIV_4,
LL_RCC_PLLSAIDIVR_DIV_8);
LL_RCC_PLLSAI_Enable();
while (LL_RCC_PLLSAI_IsReady() != 1) {
}
#endif
#if defined(CONFIG_SOC_SERIES_STM32F7X)
LL_RCC_PLLSAI_Disable();
LL_RCC_PLLSAI_ConfigDomain_LTDC(LL_RCC_PLLSOURCE_HSE,
LL_RCC_PLLM_DIV_8,
192,
LL_RCC_PLLSAIR_DIV_4,
LL_RCC_PLLSAIDIVR_DIV_8);
LL_RCC_PLLSAI_Enable();
while (LL_RCC_PLLSAI_IsReady() != 1) {
}
#endif
/* reset LTDC peripheral */ /* reset LTDC peripheral */
__HAL_RCC_LTDC_FORCE_RESET(); __HAL_RCC_LTDC_FORCE_RESET();
__HAL_RCC_LTDC_RELEASE_RESET(); __HAL_RCC_LTDC_RELEASE_RESET();