diff options
Diffstat (limited to 'drivers/mtd/spi-nor/mtk-quadspi.c')
| -rw-r--r-- | drivers/mtd/spi-nor/mtk-quadspi.c | 43 |
1 files changed, 25 insertions, 18 deletions
diff --git a/drivers/mtd/spi-nor/mtk-quadspi.c b/drivers/mtd/spi-nor/mtk-quadspi.c index 8bed1a4cb79c..e661877c23de 100644 --- a/drivers/mtd/spi-nor/mtk-quadspi.c +++ b/drivers/mtd/spi-nor/mtk-quadspi.c @@ -21,7 +21,6 @@ #include <linux/ioport.h> #include <linux/math64.h> #include <linux/module.h> -#include <linux/mtd/mtd.h> #include <linux/mutex.h> #include <linux/of.h> #include <linux/of_device.h> @@ -243,8 +242,8 @@ static void mt8173_nor_set_addr(struct mt8173_nor *mt8173_nor, u32 addr) writeb(addr & 0xff, mt8173_nor->base + MTK_NOR_RADR3_REG); } -static int mt8173_nor_read(struct spi_nor *nor, loff_t from, size_t length, - size_t *retlen, u_char *buffer) +static ssize_t mt8173_nor_read(struct spi_nor *nor, loff_t from, size_t length, + u_char *buffer) { int i, ret; int addr = (int)from; @@ -255,13 +254,13 @@ static int mt8173_nor_read(struct spi_nor *nor, loff_t from, size_t length, mt8173_nor_set_read_mode(mt8173_nor); mt8173_nor_set_addr(mt8173_nor, addr); - for (i = 0; i < length; i++, (*retlen)++) { + for (i = 0; i < length; i++) { ret = mt8173_nor_execute_cmd(mt8173_nor, MTK_NOR_PIO_READ_CMD); if (ret < 0) return ret; buf[i] = readb(mt8173_nor->base + MTK_NOR_RDATA_REG); } - return 0; + return length; } static int mt8173_nor_write_single_byte(struct mt8173_nor *mt8173_nor, @@ -297,36 +296,44 @@ static int mt8173_nor_write_buffer(struct mt8173_nor *mt8173_nor, int addr, return mt8173_nor_execute_cmd(mt8173_nor, MTK_NOR_WR_CMD); } -static void mt8173_nor_write(struct spi_nor *nor, loff_t to, size_t len, - size_t *retlen, const u_char *buf) +static ssize_t mt8173_nor_write(struct spi_nor *nor, loff_t to, size_t len, + const u_char *buf) { int ret; struct mt8173_nor *mt8173_nor = nor->priv; + size_t i; ret = mt8173_nor_write_buffer_enable(mt8173_nor); - if (ret < 0) + if (ret < 0) { dev_warn(mt8173_nor->dev, "write buffer enable failed!\n"); + return ret; + } - while (len >= SFLASH_WRBUF_SIZE) { + for (i = 0; i + SFLASH_WRBUF_SIZE <= len; i += SFLASH_WRBUF_SIZE) { ret = mt8173_nor_write_buffer(mt8173_nor, to, buf); - if (ret < 0) + if (ret < 0) { dev_err(mt8173_nor->dev, "write buffer failed!\n"); - len -= SFLASH_WRBUF_SIZE; + return ret; + } to += SFLASH_WRBUF_SIZE; buf += SFLASH_WRBUF_SIZE; - (*retlen) += SFLASH_WRBUF_SIZE; } ret = mt8173_nor_write_buffer_disable(mt8173_nor); - if (ret < 0) + if (ret < 0) { dev_warn(mt8173_nor->dev, "write buffer disable failed!\n"); + return ret; + } - if (len) { - ret = mt8173_nor_write_single_byte(mt8173_nor, to, (int)len, - (u8 *)buf); - if (ret < 0) + if (i < len) { + ret = mt8173_nor_write_single_byte(mt8173_nor, to, + (int)(len - i), (u8 *)buf); + if (ret < 0) { dev_err(mt8173_nor->dev, "write single byte failed!\n"); - (*retlen) += len; + return ret; + } } + + return len; } static int mt8173_nor_read_reg(struct spi_nor *nor, u8 opcode, u8 *buf, int len) |