Sascha Hauer e4e4b24b42 mtd: rawnand: gpmi: Set WAIT_FOR_READY timeout based on program/erase times ... commit 0fddf9ad06 upstream. 06781a5026 Fixes the calculation of the DEVICE_BUSY_TIMEOUT register value from busy_timeout_cycles. busy_timeout_cycles is calculated wrong though: It is calculated based on the maximum page read time, but the timeout is also used for page write and block erase operations which require orders of magnitude bigger timeouts. Fix this by calculating busy_timeout_cycles from the maximum of tBERS_max and tPROG_max. This is for now the easiest and most obvious way to fix the driver. There's room for improvements though: The NAND_OP_WAITRDY_INSTR tells us the desired timeout for the current operation, so we could program the timeout dynamically for each operation instead of setting a fixed timeout. Also we could wire up the interrupt handler to actually detect and forward timeouts occurred when waiting for the chip being ready. As a sidenote I verified that the change in 06781a5026 is really correct. I wired up the interrupt handler in my tree and measured the time between starting the operation and the timeout interrupt handler coming in. The time increases 41us with each step in the timeout register which corresponds to 4096 clock cycles with the 99MHz clock that I have. Fixes: 06781a5026 ("mtd: rawnand: gpmi: Fix setting busy timeout setting") Fixes: b120612206 ("mtd: rawniand: gpmi: use core timings instead of an empirical derivation") Cc: stable@vger.kernel.org Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Acked-by: Han Xu <han.xu@nxp.com> Tested-by: Tomasz Moń <tomasz.mon@camlingroup.com> Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: Tim Harvey <tharvey@gateworks.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2022-11-10 18:14:25 +01:00
..
chips	mtd: cfi_cmdset_0002: Use chip_ready() for write on S29GL064N	2022-06-09 10:21:25 +02:00
devices	mtd: devices: docg3: check the return value of devm_ioremap() in the probe	2022-10-26 13:25:34 +02:00
hyperbus	mtd: hyperbus: rpc-if: fix bug in rpcif_hb_remove	2022-01-27 10:53:50 +01:00
lpddr
maps	mtd: maps: Fix refcount leak in ap_flash_init	2022-08-21 15:15:52 +02:00
nand	mtd: rawnand: gpmi: Set WAIT_FOR_READY timeout based on program/erase times	2022-11-10 18:14:25 +01:00
parsers	mtd: parsers: bcm47xxpart: Fix halfblock reads	2022-11-10 18:14:21 +01:00
spi-nor	mtd: spi-nor: core: Check written SR value in spi_nor_write_16bit_sr_and_check()	2022-06-09 10:21:03 +02:00
tests
ubi	ubi: ubi_create_volume: Fix use-after-free when volume creation failed	2022-06-14 18:32:35 +02:00
ftl.c
inftlcore.c
inftlmount.c
Kconfig
Makefile
mtd_blkdevs.c
mtdblock.c
mtdblock_ro.c
mtdchar.c
mtdconcat.c	mtd: mtdconcat: Check _read, _write callbacks existence before assignment	2021-09-22 12:28:03 +02:00
mtdcore.c	mtd: core: don't remove debugfs directory if device is in use	2021-11-18 14:04:23 +01:00
mtdcore.h
mtdoops.c
mtdpart.c	mtd: Fixed breaking list in __mtd_del_partition.	2022-01-27 10:53:41 +01:00
mtdpstore.c
mtdsuper.c
mtdswap.c
nftlcore.c
nftlmount.c
rfd_ftl.c
sm_ftl.c	mtd: sm_ftl: Fix deadlock caused by cancel_work_sync in sm_release	2022-08-21 15:15:53 +02:00
sm_ftl.h
ssfdc.c