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echoplayer: set cpu_power_on pin high as early as possible

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Change-Id: I6b7343cc81973c4c0a14396b2ecd622fc1c65d30
This commit is contained in:
Aidan MacDonald 2026-01-16 23:32:42 +00:00 • committed by Solomon Peachy
parent 319fdcc506
commit 86c975ee88
1 changed files with 21 additions and 20 deletions
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41
firmware/target/arm/stm32/echoplayer/system-echoplayer.c
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@ -69,7 +69,6 @@ static const struct gpio_setting gpios[] = {
STM_DEFGPIO(GPIO_BUTTON_VOL_DOWN, F_INPUT_PU),
STM_DEFGPIO(GPIO_BUTTON_POWER, F_INPUT_PD),
STM_DEFGPIO(GPIO_BUTTON_HOLD, F_INPUT_PU),
STM_DEFGPIO(GPIO_CPU_POWER_ON, F_OUT_LS(1)), /* active high */
STM_DEFGPIO(GPIO_POWER_1V8, F_OUT_LS(0)), /* active high */
STM_DEFGPIO(GPIO_CODEC_AVDD_EN, F_OUT_LS(1)), /* active low */
STM_DEFGPIO(GPIO_CODEC_DVDD_EN, F_OUT_LS(1)), /* active low */
@ -123,24 +122,6 @@ static const struct pingroup_setting pingroups[] = {
STM_DEFPINS(GPIO_I, 0x06e7, F_LCD_AF14),
};
INIT_ATTR static void gpio_init(void)
{
/* Enable clocks for all used GPIO banks */
reg_writef(RCC_AHB4ENR,
GPIOAEN(1), GPIOBEN(1), GPIOCEN(1), GPIODEN(1),
GPIOEEN(1), GPIOFEN(1), GPIOGEN(1), GPIOHEN(1), GPIOIEN(1));
/*
* NOTE: I think it's possible to disable clocks for the banks which
* we don't need to access at runtime because these are only clocking
* register access. Probably a micro-optimization but it supposedly
* does save a few uA/MHz.
*/
gpio_configure_all(gpios, ARRAYLEN(gpios),
pingroups, ARRAYLEN(pingroups));
}
INIT_ATTR static void fmc_init(void)
{
/* configure clock */
@ -190,6 +171,25 @@ INIT_ATTR static void fmc_init(void)
void system_init(void)
{
/* Enable clocks for all used GPIO banks */
reg_writef(RCC_AHB4ENR,
GPIOAEN(1), GPIOBEN(1), GPIOCEN(1), GPIODEN(1),
GPIOEEN(1), GPIOFEN(1), GPIOGEN(1), GPIOHEN(1), GPIOIEN(1));
/*
* NOTE: I think it's possible to disable clocks for the banks which
* we don't need to access at runtime because these are only clocking
* register access. Probably a micro-optimization but it supposedly
* does save a few uA/MHz.
*/
/*
* Set cpu_power_on high as early as possible to
* ensure we won't brown out if the power button
* isn't pressed.
*/
gpio_configure_single(GPIO_CPU_POWER_ON, F_OUT_LS(1));
/* Set vector table address */
extern char __vectors_arm[];
reg_var(CM_SCB_VTOR) = (uint32_t)__vectors_arm;
@ -208,7 +208,8 @@ void system_init(void)
stm32_systick_enable();
/* Configure GPIOs and start FMC */
gpio_init();
gpio_configure_all(gpios, ARRAYLEN(gpios),
pingroups, ARRAYLEN(pingroups));
fmc_init();
/* Disable RTC_OUT pin */