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authorOlga Kitaina <okitain@gmail.com>2022-06-28 18:48:24 +0300
committerMiquel Raynal <miquel.raynal@bootlin.com>2022-06-29 14:38:08 +0300
commite16eceea863b417fd328588b1be1a79de0bc937f (patch)
tree3f5daf164c4ea3e3dc7e54158159b38a887a4cf5 /drivers/mtd/nand
parent7499bfeedb47efc1ee4dc793b92c610d46e6d6a6 (diff)
downloadlinux-e16eceea863b417fd328588b1be1a79de0bc937f.tar.xz
mtd: rawnand: arasan: Fix clock rate in NV-DDR
According to the Arasan NAND controller spec, the flash clock rate for SDR must be <= 100 MHz, while for NV-DDR it must be the same as the rate of the CLK line for the mode. The driver previously always set 100 MHz for NV-DDR, which would result in incorrect behavior for NV-DDR modes 0-4. The appropriate clock rate can be calculated from the NV-DDR timing parameters as 1/tCK, or for rates measured in picoseconds, 10^12 / nand_nvddr_timings->tCK_min. Fixes: 197b88fecc50 ("mtd: rawnand: arasan: Add new Arasan NAND controller") CC: stable@vger.kernel.org # 5.8+ Signed-off-by: Olga Kitaina <okitain@gmail.com> Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@xilinx.com> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Link: https://lore.kernel.org/linux-mtd/20220628154824.12222-3-amit.kumar-mahapatra@xilinx.com
Diffstat (limited to 'drivers/mtd/nand')
-rw-r--r--drivers/mtd/nand/raw/arasan-nand-controller.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/mtd/nand/raw/arasan-nand-controller.c b/drivers/mtd/nand/raw/arasan-nand-controller.c
index c5264fa223c4..296fb16c8dc3 100644
--- a/drivers/mtd/nand/raw/arasan-nand-controller.c
+++ b/drivers/mtd/nand/raw/arasan-nand-controller.c
@@ -1043,7 +1043,13 @@ static int anfc_setup_interface(struct nand_chip *chip, int target,
DQS_BUFF_SEL_OUT(dqs_mode);
}
- anand->clk = ANFC_XLNX_SDR_DFLT_CORE_CLK;
+ if (nand_interface_is_sdr(conf)) {
+ anand->clk = ANFC_XLNX_SDR_DFLT_CORE_CLK;
+ } else {
+ /* ONFI timings are defined in picoseconds */
+ anand->clk = div_u64((u64)NSEC_PER_SEC * 1000,
+ conf->timings.nvddr.tCK_min);
+ }
/*
* Due to a hardware bug in the ZynqMP SoC, SDR timing modes 0-1 work