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mtd: rawnand: atmel: Enable the NFC controller at probe time

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No need to enable it everytime select_chip() is called. If we really
care about PM, we should implement runtime PM hooks and disable the
controller and all its clocks when the controller has been unused for
some time.

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20200720131356.1579073-2-tudor.ambarus@microchip.com
This commit is contained in:
Boris Brezillon 2020-07-20 16:13:51 +03:00 committed by Miquel Raynal
parent b5156335ac
commit b0155dadeb
1 changed files with 6 additions and 6 deletions
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12
drivers/mtd/nand/raw/atmel/nand-controller.c
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@ -525,11 +525,8 @@ static void atmel_hsmc_nand_select_chip(struct nand_chip *chip, int cs)
atmel_nand_select_chip(chip, cs);
if (!nand->activecs) {
regmap_write(nc->base.smc, ATMEL_HSMC_NFC_CTRL,
ATMEL_HSMC_NFC_CTRL_DIS);
if (!nand->activecs)
return;
}
if (nand->activecs->rb.type == ATMEL_NAND_NATIVE_RB)
chip->legacy.dev_ready = atmel_hsmc_nand_dev_ready;
@ -542,8 +539,6 @@ static void atmel_hsmc_nand_select_chip(struct nand_chip *chip, int cs)
ATMEL_HSMC_NFC_CFG_PAGESIZE(mtd->writesize) |
ATMEL_HSMC_NFC_CFG_SPARESIZE(mtd->oobsize) |
ATMEL_HSMC_NFC_CFG_RSPARE);
regmap_write(nc->base.smc, ATMEL_HSMC_NFC_CTRL,
ATMEL_HSMC_NFC_CTRL_EN);
}
static int atmel_nfc_exec_op(struct atmel_hsmc_nand_controller *nc, bool poll)
@ -2251,6 +2246,9 @@ atmel_hsmc_nand_controller_remove(struct atmel_nand_controller *nc)
return ret;
hsmc_nc = container_of(nc, struct atmel_hsmc_nand_controller, base);
regmap_write(hsmc_nc->base.smc, ATMEL_HSMC_NFC_CTRL,
ATMEL_HSMC_NFC_CTRL_DIS);
if (hsmc_nc->sram.pool)
gen_pool_free(hsmc_nc->sram.pool,
(unsigned long)hsmc_nc->sram.virt,
@ -2303,6 +2301,8 @@ static int atmel_hsmc_nand_controller_probe(struct platform_device *pdev,
/* Initial NFC configuration. */
regmap_write(nc->base.smc, ATMEL_HSMC_NFC_CFG,
ATMEL_HSMC_NFC_CFG_DTO_MAX);
regmap_write(nc->base.smc, ATMEL_HSMC_NFC_CTRL,
ATMEL_HSMC_NFC_CTRL_EN);
ret = atmel_nand_controller_add_nands(&nc->base);
if (ret)