diff options
| author | Christophe Kerello | 2022-02-22 17:38:49 +0100 |
|---|---|---|
| committer | Patrice Chotard | 2022-03-15 09:10:52 +0100 |
| commit | 7ce4f1fad28e538d216065b5042f6f20a5f50a90 (patch) | |
| tree | a53c4b42e06add9010c04e0a1fafd09f0d03b635 | |
| parent | c149bf41404e34014e37de32fac332892b11bd4a (diff) | |
mtd: rawnand: stm32_fmc2: add NAND Write Protect support
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>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
| -rw-r--r-- | drivers/mtd/nand/raw/stm32_fmc2_nand.c | 9 |
1 files changed, 9 insertions, 0 deletions
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; |