Sascha Hauer 0fddf9ad06 mtd: rawnand: gpmi: Set WAIT_FOR_READY timeout based on program/erase times ... 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>		2022-07-15 17:41:11 +02:00
..
onenand	mtd: onenand: Check for error irq	2022-01-23 16:37:17 +01:00
raw	mtd: rawnand: gpmi: Set WAIT_FOR_READY timeout based on program/erase times	2022-07-15 17:41:11 +02:00
spi	mtd: spinand: Add support for XTX XT26G0xA	2022-04-21 09:34:12 +02:00
Kconfig	mtd: nand: MTD_NAND_ECC_MEDIATEK should depend on ARCH_MEDIATEK	2022-05-12 16:43:04 +02:00
Makefile	mtd: nand: make mtk_ecc.c a separated module	2022-04-27 18:12:35 +02:00
bbt.c	mtd: nand: bbt: Fix corner case in bad block table handling	2021-05-10 18:20:54 +02:00
core.c	Topic branch bringing-in changes related to the support of ECC engines	2022-02-18 15:11:12 +01:00
ecc-mtk.c	MTD core changes:	2022-05-24 14:31:29 -07:00
ecc-mxic.c	mtd: nand: mxic-ecc: make two read-only arrays static const	2022-03-14 17:01:58 +01:00
ecc-sw-bch.c	mtd: nand: ecc-bch: Use the public nsteps field	2021-03-11 09:37:28 +01:00
ecc-sw-hamming.c	mtd: rawnand: Let callers use the bare Hamming helpers	2021-10-15 12:20:59 +02:00
ecc.c	mtd: nand: ecc: Provide a helper to retrieve a pilelined engine device	2022-02-09 09:49:36 +01:00