diff options
Diffstat (limited to 'target/linux/ipq40xx/patches-4.14/050-0005-mtd-nand-force-drivers-to-explicitly-send-READ-PROG-.patch')
| -rw-r--r-- | target/linux/ipq40xx/patches-4.14/050-0005-mtd-nand-force-drivers-to-explicitly-send-READ-PROG-.patch | 94 |
1 files changed, 0 insertions, 94 deletions
diff --git a/target/linux/ipq40xx/patches-4.14/050-0005-mtd-nand-force-drivers-to-explicitly-send-READ-PROG-.patch b/target/linux/ipq40xx/patches-4.14/050-0005-mtd-nand-force-drivers-to-explicitly-send-READ-PROG-.patch deleted file mode 100644 index e7e2e798a1..0000000000 --- a/target/linux/ipq40xx/patches-4.14/050-0005-mtd-nand-force-drivers-to-explicitly-send-READ-PROG-.patch +++ /dev/null @@ -1,94 +0,0 @@ -From 25f815f66a141436df8a4c45e5d2765272aea2ac Mon Sep 17 00:00:00 2001 -From: Boris Brezillon <boris.brezillon@free-electrons.com> -Date: Thu, 30 Nov 2017 18:01:30 +0100 -Subject: [PATCH 5/7] mtd: nand: force drivers to explicitly send READ/PROG - commands - -The core currently send the READ0 and SEQIN+PAGEPROG commands in -nand_do_read/write_ops(). This is inconsistent with -->read/write_oob[_raw]() hooks behavior which are expected to send -these commands. - -There's already a flag (NAND_ECC_CUSTOM_PAGE_ACCESS) to inform the core -that a specific controller wants to send the READ/SEQIN+PAGEPROG -commands on its own, but it's an opt-in flag, and existing drivers are -unlikely to be updated to pass it. - -Moreover, some controllers cannot dissociate the READ/PAGEPROG commands -from the associated data transfer and ECC engine activation, and -developers have to hack things in their ->cmdfunc() implementation to -handle such complex cases, or have to accept the perf penalty of sending -twice the same command. -To address this problem we are planning on adding a new interface which -is passed all information about a NAND operation (including the amount -of data to transfer) and replacing all calls to ->cmdfunc() to calls to -this new ->exec_op() hook. But, in order to do that, we need to have all -->cmdfunc() calls placed near their associated ->read/write_buf/byte() -calls. - -Modify the core and relevant drivers to make NAND_ECC_CUSTOM_PAGE_ACCESS -the default case, and remove this flag. - -Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> -[miquel.raynal@free-electrons.com: tested, fixed and rebased on nand/next] -Signed-off-by: Miquel Raynal <miquel.raynal@free-electrons.com> -Acked-by: Masahiro Yamada <yamada.masahiro@socionext.com> ---- - drivers/mtd/nand/qcom_nandc.c | 11 +++++++++++ - 1 file changed, 11 insertions(+) - ---- a/drivers/mtd/nand/qcom_nandc.c -+++ b/drivers/mtd/nand/qcom_nandc.c -@@ -1725,6 +1725,7 @@ static int qcom_nandc_read_page(struct m - u8 *data_buf, *oob_buf = NULL; - int ret; - -+ nand_read_page_op(chip, page, 0, NULL, 0); - data_buf = buf; - oob_buf = oob_required ? chip->oob_poi : NULL; - -@@ -1750,6 +1751,7 @@ static int qcom_nandc_read_page_raw(stru - int i, ret; - int read_loc; - -+ nand_read_page_op(chip, page, 0, NULL, 0); - data_buf = buf; - oob_buf = chip->oob_poi; - -@@ -1850,6 +1852,8 @@ static int qcom_nandc_write_page(struct - u8 *data_buf, *oob_buf; - int i, ret; - -+ nand_prog_page_begin_op(chip, page, 0, NULL, 0); -+ - clear_read_regs(nandc); - clear_bam_transaction(nandc); - -@@ -1902,6 +1906,9 @@ static int qcom_nandc_write_page(struct - - free_descs(nandc); - -+ if (!ret) -+ ret = nand_prog_page_end_op(chip); -+ - return ret; - } - -@@ -1916,6 +1923,7 @@ static int qcom_nandc_write_page_raw(str - u8 *data_buf, *oob_buf; - int i, ret; - -+ nand_prog_page_begin_op(chip, page, 0, NULL, 0); - clear_read_regs(nandc); - clear_bam_transaction(nandc); - -@@ -1970,6 +1978,9 @@ static int qcom_nandc_write_page_raw(str - - free_descs(nandc); - -+ if (!ret) -+ ret = nand_prog_page_end_op(chip); -+ - return ret; - } - |