This patch adds the support of the WP# signal. WP will be disabled before the first access to the NAND flash.
Signed-off-by: Christophe Kerello christophe.kerello@foss.st.com ---
drivers/mtd/nand/raw/stm32_fmc2_nand.c | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/drivers/mtd/nand/raw/stm32_fmc2_nand.c b/drivers/mtd/nand/raw/stm32_fmc2_nand.c index eee65949d77..fb3279b405e 100644 --- a/drivers/mtd/nand/raw/stm32_fmc2_nand.c +++ b/drivers/mtd/nand/raw/stm32_fmc2_nand.c @@ -12,6 +12,7 @@ #include <log.h> #include <nand.h> #include <reset.h> +#include <asm/gpio.h> #include <dm/device_compat.h> #include <linux/bitfield.h> #include <linux/bitops.h> @@ -149,6 +150,7 @@ struct stm32_fmc2_timings { struct stm32_fmc2_nand { struct nand_chip chip; struct stm32_fmc2_timings timings; + struct gpio_desc wp_gpio; int ncs; int cs_used[FMC2_MAX_CE]; }; @@ -824,6 +826,9 @@ static int stm32_fmc2_nfc_parse_child(struct stm32_fmc2_nfc *nfc, ofnode node) nand->cs_used[i] = cs[i]; }
+ gpio_request_by_name_nodev(node, "wp-gpios", 0, &nand->wp_gpio, + GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE); + nand->chip.flash_node = node;
return 0; @@ -972,6 +977,10 @@ static int stm32_fmc2_nfc_probe(struct udevice *dev) chip->ecc.size = FMC2_ECC_STEP_SIZE; chip->ecc.strength = FMC2_ECC_BCH8;
+ /* Disable Write Protect */ + if (dm_gpio_is_valid(&nand->wp_gpio)) + dm_gpio_set_value(&nand->wp_gpio, 0); + ret = nand_scan_ident(mtd, nand->ncs, NULL); if (ret) return ret;