Commit 331423d8 authored by Francois Ramu's avatar Francois Ramu Committed by Mahesh Mahadevan
Browse files

drivers: flash: stm32H7 flash driver enable clock when defined 



Not all the stm32H7 have a clock enable for their flash;
only the dual-core.
For the st,stm32h7-flash-controller with "clocks" property, the driver
will enable the flash clock bit in the corresponding RCC register.

Signed-off-by: default avatarFrancois Ramu <francois.ramu@st.com>
parent 5c529919

drivers/flash/flash_stm32h7x.c

+6 −2
Original line number Diff line number Diff line
@@ -702,8 +702,10 @@ void flash_stm32_page_layout(const struct device *dev, 


static struct flash_stm32_priv flash_data = {

	.regs = (FLASH_TypeDef *) DT_INST_REG_ADDR(0),

#if DT_NODE_HAS_PROP(DT_INST(0, st_stm32h7_flash_controller), clocks)

	.pclken = { .bus = DT_INST_CLOCKS_CELL(0, bus),

		    .enr = DT_INST_CLOCKS_CELL(0, bits)},

#endif

};



static const struct flash_driver_api flash_stm32h7_api = {
@@ -718,6 +720,8 @@ static const struct flash_driver_api flash_stm32h7_api = { 


static int stm32h7_flash_init(const struct device *dev)

{

#if DT_NODE_HAS_PROP(DT_INST(0, st_stm32h7_flash_controller), clocks)

	/* Only stm32h7 dual core devices have the clocks property */

	struct flash_stm32_priv *p = FLASH_STM32_PRIV(dev);

	const struct device *const clk = DEVICE_DT_GET(STM32_CLOCK_CONTROL_NODE);
@@ -726,12 +730,12 @@ static int stm32h7_flash_init(const struct device *dev) 
		return -ENODEV;

	}



	/* enable clock */

	/* enable clock : enable the RCC_AHB3ENR_FLASHEN bit */

	if (clock_control_on(clk, (clock_control_subsys_t)&p->pclken) != 0) {

		LOG_ERR("Failed to enable clock");

		return -EIO;

	}



#endif

	flash_stm32_sem_init(dev);



	LOG_DBG("Flash initialized. BS: %zu",

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