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| author | Cédric Le Goater <clg@kaod.org> | 2019-04-17 15:39:41 +0200 |
|---|---|---|
| committer | Andrew Jeffery <andrew@aj.id.au> | 2019-04-18 11:11:23 +0930 |
| commit | 280a5e83425e0e597a3765037a03cd03e80f3111 (patch) | |
| tree | 7a29308267c7c9c9c04c3d2dda40b3b8faa751b5 | |
| parent | cb8980080ccb7879c5a8ef0e3efa783c9288d907 (diff) | |
| download | talos-obmc-linux-280a5e83425e0e597a3765037a03cd03e80f3111.tar.gz talos-obmc-linux-280a5e83425e0e597a3765037a03cd03e80f3111.zip | |
mtd: spi-nor: aspeed: add support for the 4B opcodes
Switch the default controller value to use the read mode in order to
customize the command and use SPINOR_OP_READ_4B (0x13) when the chip
supports 4B opcodes.
OpenBMC-Staging-Count: 1
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
| -rw-r--r-- | drivers/mtd/spi-nor/aspeed-smc.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/mtd/spi-nor/aspeed-smc.c b/drivers/mtd/spi-nor/aspeed-smc.c index 7e289ecb1c99..1200b23416e3 100644 --- a/drivers/mtd/spi-nor/aspeed-smc.c +++ b/drivers/mtd/spi-nor/aspeed-smc.c @@ -890,14 +890,21 @@ static u32 aspeed_smc_default_read(struct aspeed_smc_chip *chip) */ u32 ctl_mask = chip->controller->info == &spi_2400_info ? CONTROL_IO_ADDRESS_4B : 0; + u8 cmd = chip->nor.flags & SNOR_F_4B_OPCODES ? SPINOR_OP_READ_4B : + SPINOR_OP_READ; + /* + * Use the "read command" mode to customize the opcode. In + * normal command mode, the value is necessarily READ (0x3) on + * the AST2400/2500 SoCs. + */ return (chip->ctl_val[smc_read] & ctl_mask) | (0x00 << 28) | /* Single bit */ (0x00 << 24) | /* CE# max */ - (0x03 << 16) | /* use normal reads */ + (cmd << 16) | /* use read mode to support 4B opcode */ (0x00 << 8) | /* HCLK/16 */ (0x00 << 6) | /* no dummy cycle */ - (0x00); /* normal mode */ + (0x01); /* read mode */ } static int aspeed_smc_optimize_read(struct aspeed_smc_chip *chip, |
