This adds reset handling to the devicetree-enabled Denali NAND driver.
For backwards compatibility, only a warning is printed when failing to get reset handles.
Signed-off-by: Simon Goldschmidt simon.k.r.goldschmidt@gmail.com ---
Changes in v3: - add DM_FLAG_OS_PREPARE flag
Changes in v2: - fix copy/paste issues - add .remove callback to release the resets
drivers/mtd/nand/raw/denali.h | 2 ++ drivers/mtd/nand/raw/denali_dt.c | 15 +++++++++++++++ 2 files changed, 17 insertions(+)
diff --git a/drivers/mtd/nand/raw/denali.h b/drivers/mtd/nand/raw/denali.h index 019deda094..63ae828768 100644 --- a/drivers/mtd/nand/raw/denali.h +++ b/drivers/mtd/nand/raw/denali.h @@ -10,6 +10,7 @@ #include <linux/bitops.h> #include <linux/mtd/rawnand.h> #include <linux/types.h> +#include <reset.h>
#define DEVICE_RESET 0x0 #define DEVICE_RESET__BANK(bank) BIT(bank) @@ -315,6 +316,7 @@ struct denali_nand_info { void (*host_write)(struct denali_nand_info *denali, u32 addr, u32 data); void (*setup_dma)(struct denali_nand_info *denali, dma_addr_t dma_addr, int page, int write); + struct reset_ctl_bulk resets; };
#define DENALI_CAP_HW_ECC_FIXUP BIT(0) diff --git a/drivers/mtd/nand/raw/denali_dt.c b/drivers/mtd/nand/raw/denali_dt.c index d384b974df..0ce81324b9 100644 --- a/drivers/mtd/nand/raw/denali_dt.c +++ b/drivers/mtd/nand/raw/denali_dt.c @@ -131,15 +131,30 @@ static int denali_dt_probe(struct udevice *dev) denali->clk_x_rate = 200000000; }
+ ret = reset_get_bulk(dev, &denali->resets); + if (ret) + dev_warn(dev, "Can't get reset: %d\n", ret); + else + reset_deassert_bulk(&denali->resets); + return denali_init(denali); }
+static int denali_dt_remove(struct udevice *dev) +{ + struct denali_nand_info *denali = dev_get_priv(dev); + + return reset_release_bulk(&denali->resets); +} + U_BOOT_DRIVER(denali_nand_dt) = { .name = "denali-nand-dt", .id = UCLASS_MISC, .of_match = denali_nand_dt_ids, .probe = denali_dt_probe, .priv_auto_alloc_size = sizeof(struct denali_nand_info), + .remove = denali_dt_remove, + .flags = DM_FLAG_OS_PREPARE, };
void board_nand_init(void)