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mtd: atmel_nand: replace cpu_is_at32ap7000() with a nand platform data

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The nand driver use cpu_is_at32ap7000() macro for a workaround. For the
multi-platform support, we will remove this cpu_is_xxx() macro.

This patch adds a boolean variable need_reset_workaround in structure
atmel_nand_data. Using this variable we can remove cpu_is_at32ap7000() macro.

Hans-Christian: Feel free to push this through the mtd tree, if they won't
accept it I'm working on getting my workflow up on the linux-avr32.git tree.

Signed-off-by: Josh Wu <josh.wu@atmel.com>
Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Josh Wu 2013-05-09 15:34:54 +08:00 committed by David Woodhouse
parent d1cb556c3f
commit 71b94e2e86
3 changed files with 12 additions and 7 deletions
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3
arch/avr32/mach-at32ap/at32ap700x.c
View File

@ -1983,6 +1983,9 @@ at32_add_device_nand(unsigned int id, struct atmel_nand_data *data)
ARRAY_SIZE(smc_cs3_resource)))
goto fail;
/* For at32ap7000, we use the reset workaround for nand driver */
data->need_reset_workaround = true;
if (platform_device_add_data(pdev, data,
sizeof(struct atmel_nand_data)))
goto fail;

7
drivers/mtd/nand/atmel_nand.c
View File

@ -1174,10 +1174,9 @@ static int atmel_nand_read_page(struct mtd_info *mtd, struct nand_chip *chip,
* Workaround: Reset the parity registers before reading the
* actual data.
*/
if (cpu_is_at32ap7000()) {
struct atmel_nand_host *host = chip->priv;
if (host->board.need_reset_workaround)
ecc_writel(host->ecc, CR, ATMEL_ECC_RST);
}
/* read the page */
chip->read_buf(mtd, p, eccsize);
@ -1298,12 +1297,12 @@ static int atmel_nand_correct(struct mtd_info *mtd, u_char *dat,
*/
static void atmel_nand_hwctl(struct mtd_info *mtd, int mode)
{
if (cpu_is_at32ap7000()) {
struct nand_chip *nand_chip = mtd->priv;
struct atmel_nand_host *host = nand_chip->priv;
if (host->board.need_reset_workaround)
ecc_writel(host->ecc, CR, ATMEL_ECC_RST);
}
}
#if defined(CONFIG_OF)
static int atmel_of_init_port(struct atmel_nand_host *host,

3
include/linux/platform_data/atmel.h
View File

@ -71,6 +71,9 @@ struct atmel_nand_data {
u8 on_flash_bbt; /* bbt on flash */
struct mtd_partition *parts;
unsigned int num_parts;
/* default is false, only for at32ap7000 chip is true */
bool need_reset_workaround;
};
/* Serial */