diff options
Diffstat (limited to 'target/linux/brcm63xx/patches-3.14/203-MTD-DEVICES-m25p80-add-support-for-limiting-reads.patch')
| -rw-r--r-- | target/linux/brcm63xx/patches-3.14/203-MTD-DEVICES-m25p80-add-support-for-limiting-reads.patch | 92 |
1 files changed, 0 insertions, 92 deletions
diff --git a/target/linux/brcm63xx/patches-3.14/203-MTD-DEVICES-m25p80-add-support-for-limiting-reads.patch b/target/linux/brcm63xx/patches-3.14/203-MTD-DEVICES-m25p80-add-support-for-limiting-reads.patch deleted file mode 100644 index e5676dc79c..0000000000 --- a/target/linux/brcm63xx/patches-3.14/203-MTD-DEVICES-m25p80-add-support-for-limiting-reads.patch +++ /dev/null @@ -1,92 +0,0 @@ -From 5fb4e8d7287ac8fcb33aae8b1e9e22c5a3c392bd Mon Sep 17 00:00:00 2001 -From: Jonas Gorski <jonas.gorski@gmail.com> -Date: Thu, 10 Nov 2011 17:33:40 +0100 -Subject: [PATCH 51/79] MTD: DEVICES: m25p80: add support for limiting reads - -Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com> ---- - drivers/mtd/devices/m25p80.c | 29 +++++++++++++++++++++++++++-- - include/linux/spi/flash.h | 4 ++++ - 2 files changed, 31 insertions(+), 2 deletions(-) - ---- a/drivers/mtd/devices/m25p80.c -+++ b/drivers/mtd/devices/m25p80.c -@@ -115,6 +115,7 @@ struct m25p { - u8 program_opcode; - u8 *command; - enum read_type flash_read; -+ int max_transfer_len; - }; - - static inline struct m25p *mtd_to_m25p(struct mtd_info *mtd) -@@ -509,10 +510,9 @@ static inline unsigned int m25p80_rx_nbi - * Read an address range from the flash chip. The address range - * may be any size provided it is within the physical boundaries. - */ --static int m25p80_read(struct mtd_info *mtd, loff_t from, size_t len, -+static int __m25p80_read(struct m25p *flash, loff_t from, size_t len, - size_t *retlen, u_char *buf) - { -- struct m25p *flash = mtd_to_m25p(mtd); - struct spi_transfer t[2]; - struct spi_message m; - uint8_t opcode; -@@ -562,6 +562,28 @@ static int m25p80_read(struct mtd_info * - return 0; - } - -+static int m25p80_read(struct mtd_info *mtd, loff_t from, size_t len, -+ size_t *retlen, u_char *buf) -+{ -+ struct m25p *flash = mtd_to_m25p(mtd); -+ size_t off; -+ size_t read_len = flash->max_transfer_len; -+ size_t part_len; -+ int ret = 0; -+ -+ if (!read_len) -+ return __m25p80_read(flash, from, len, retlen, buf); -+ -+ *retlen = 0; -+ -+ for (off = 0; off < len && !ret; off += read_len) { -+ ret = __m25p80_read(flash, from + off, min(len - off, read_len), -+ &part_len, buf + off); -+ *retlen += part_len; -+ } -+ -+ return ret; -+} - /* - * Write an address range to the flash chip. Data must be written in - * FLASH_PAGESIZE chunks. The address range may be any size provided -@@ -1159,6 +1181,9 @@ static int m25p_probe(struct spi_device - if (!flash->command) - return -ENOMEM; - -+ if (data) -+ flash->max_transfer_len = data->max_transfer_len; -+ - flash->spi = spi; - mutex_init(&flash->lock); - spi_set_drvdata(spi, flash); ---- a/include/linux/spi/flash.h -+++ b/include/linux/spi/flash.h -@@ -13,6 +13,8 @@ struct mtd_part_parser_data; - * @part_probe_types: optional list of MTD parser names to use for - * partitioning - * -+ * @max_transfer_len: option maximum read/write length limitation for -+ * SPI controllers not able to transfer any length commands. - * Board init code (in arch/.../mach-xxx/board-yyy.c files) can - * provide information about SPI flash parts (such as DataFlash) to - * help set up the device and its appropriate default partitioning. -@@ -28,6 +30,8 @@ struct flash_platform_data { - char *type; - - const char **part_probe_types; -+ -+ unsigned int max_transfer_len; - /* we'll likely add more ... use JEDEC IDs, etc */ - }; - |