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f1525e785e
Backport below changes for GigaDevice GD25Q256 support from v4.15: e27072851bf7 mtd: spi-nor: add a quad_enable callback in struct flash_info 65153846b18c mtd: spi-nor: add support for GD25Q256 This chip is used on newer Quad-E4G boards. Before: [ 2.366493] m25p80 spi0.0: unrecognized JEDEC id bytes: c8, 40, 19 [ 2.372853] m25p80: probe of spi0.0 failed with error -2 After: [ 2.371722] m25p80 spi0.0: gd25q256 (32768 Kbytes) [ 2.376694] 5 fixed-partitions partitions found on MTD device spi0.0 [ 2.383043] Creating 5 MTD partitions on "spi0.0": [ 2.387824] 0x000000000000-0x000000030000 : "u-boot" [ 2.394138] 0x000000030000-0x000000031000 : "u-boot-env" [ 2.400608] 0x000000031000-0x000000040000 : "config" [ 2.406830] 0x000000040000-0x000000050000 : "factory" [ 2.413169] 0x000000050000-0x000002000000 : "firmware" Signed-off-by: Kuan-Yi Li <kyli@abysm.org>
37 lines
957 B
Diff
37 lines
957 B
Diff
From: Felix Fietkau <nbd@nbd.name>
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Date: Thu, 22 Feb 2018 11:11:57 +0100
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Subject: [PATCH] mtd: spi-nor: allow NOR driver to write fewer bytes than
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requested
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The write size can be constrained by the maximum message/transfer size
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of the SPI controller. Only check for ret = 0 to avoid an infinite loop.
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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--- a/drivers/mtd/spi-nor/spi-nor.c
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+++ b/drivers/mtd/spi-nor/spi-nor.c
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@@ -1387,7 +1387,7 @@ static int spi_nor_write(struct mtd_info
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write_enable(nor);
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ret = nor->write(nor, addr, page_remain, buf + i);
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- if (ret < 0)
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+ if (ret <= 0)
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goto write_err;
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written = ret;
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@@ -1396,13 +1396,6 @@ static int spi_nor_write(struct mtd_info
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goto write_err;
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*retlen += written;
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i += written;
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- if (written != page_remain) {
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- dev_err(nor->dev,
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- "While writing %zu bytes written %zd bytes\n",
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- page_remain, written);
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- ret = -EIO;
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- goto write_err;
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- }
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}
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write_err:
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