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2970bf5a32
linux/drivers/mtd/nand
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Dario Binacchi 2970bf5a32 mtd: rawnand: gpmi: fix controller timings setting 
Set the controller registers according to the real clock rate. The
controller registers configuration (setup, hold, timeout, ... cycles)
depends on the clock rate of the GPMI. Using the real rate instead of
the ideal one, avoids that this inaccuracy (required_rate - real_rate)
affects the registers setting.

This patch has been tested on two custom boards with i.MX28 and i.MX6
SOCs:
- i.MX28:
  required rate 100MHz, real rate 99.3MHz
- i.MX6
  required rate 100MHz, real rate 99MHz

Fixes: b120612206 ("mtd: rawnand: gpmi: use core timings instead of an empirical derivation")
Co-developed-by: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Tested-by: Sascha Hauer <s.hauer@pengutronix.de>
Reviewed-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20220118095434.35081-3-dario.binacchi@amarulasolutions.com
2022-01-23 16:38:35 +01:00
..
onenand mtd: onenand: Check for error irq 2022-01-23 16:37:17 +01:00
raw mtd: rawnand: gpmi: fix controller timings setting 2022-01-23 16:38:35 +01:00
spi mtd: spinand: macronix: Add Quad support for serial NAND flash 2021-08-17 10:42:00 +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 mtd: Introduce an expert mode for forensics and debugging purposes 2021-12-09 17:51:59 +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: spinand: Allow the case where there is no ECC engine 2020-12-10 22:37:30 +01:00
Kconfig mtd: nand: Change dependency between the NAND and ECC cores 2020-12-10 22:37:32 +01:00
Makefile mtd: nand: ecc-hamming: Move Hamming code to the generic NAND layer 2020-12-10 22:37:29 +01:00