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drivers: flash: spi_nor: support serial flash API

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Expose the internal JESD216 function used to read data from the SFDP
region, and another function to read the JEDEC ID.

Signed-off-by: Peter A. Bigot <pab@pabigot.com>
This commit is contained in:
Peter A. Bigot 2020-06-03 19:57:27 -05:00 • committed by Anas Nashif
commit 368cf2fc45
2 changed files with 24 additions and 1 deletions
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1
drivers/flash/Kconfig
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@ -25,6 +25,7 @@ config FLASH_JESD216
config FLASH_JESD216_API config FLASH_JESD216_API
bool "Provide API to read JESD216 flash parameters" bool "Provide API to read JESD216 flash parameters"
depends on FLASH_JESD216
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This option extends the Zephyr flash API with the ability This option extends the Zephyr flash API with the ability
to access the Serial Flash Discoverable Parameter section to access the Serial Flash Discoverable Parameter section

24
drivers/flash/spi_nor.c
View file

@ -304,7 +304,7 @@ static int spi_nor_access(const struct device *const dev,
#define spi_nor_cmd_addr_write(dev, opcode, addr, src, length) \ #define spi_nor_cmd_addr_write(dev, opcode, addr, src, length) \
spi_nor_access(dev, opcode, true, addr, (void *)src, length, true) spi_nor_access(dev, opcode, true, addr, (void *)src, length, true)
#if CONFIG_SPI_NOR_SFDP_RUNTIME #if defined(CONFIG_SPI_NOR_SFDP_RUNTIME) || defined(CONFIG_FLASH_JESD216_API)
/* /*
* @brief Read content from the SFDP hierarchy * @brief Read content from the SFDP hierarchy
* *
@ -599,6 +599,24 @@ static int spi_nor_write_protection_set(struct device *dev, bool write_protect)
return ret; return ret;
} }
#if defined(CONFIG_FLASH_JESD216_API)
static int spi_nor_sfdp_read(struct device *dev, off_t addr,
void *dest, size_t size)
{
acquire_device(dev);
spi_nor_wait_until_ready(dev);
int ret = read_sfdp(dev, addr, dest, size);
release_device(dev);
return ret;
}
#endif /* CONFIG_FLASH_JESD216_API */
static int spi_nor_read_jedec_id(struct device *dev, static int spi_nor_read_jedec_id(struct device *dev,
uint8_t *id) uint8_t *id)
{ {
@ -948,6 +966,10 @@ static const struct flash_driver_api spi_nor_api = {
#if defined(CONFIG_FLASH_PAGE_LAYOUT) #if defined(CONFIG_FLASH_PAGE_LAYOUT)
.page_layout = spi_nor_pages_layout, .page_layout = spi_nor_pages_layout,
#endif #endif
#if defined(CONFIG_FLASH_JESD216_API)
.sfdp_read = spi_nor_sfdp_read,
.read_jedec_id = spi_nor_read_jedec_id,
#endif
}; };
#ifndef CONFIG_SPI_NOR_SFDP_RUNTIME #ifndef CONFIG_SPI_NOR_SFDP_RUNTIME