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authorPotin Lai <potin.lai@quantatw.com>2022-05-09 19:56:16 +0200
committerMark Brown <broonie@kernel.org>2022-05-16 12:59:21 +0100
commit73ae97e3cabb580639f02f12a192324a53c4bebb (patch)
tree75993ead71b8c30e737fe692cd07ab4cf4a0920d /drivers/spi
parenteeaec1ea05c0e0f08e04c6844f20cc24a2fcc0f4 (diff)
mtd: spi-nor: aspeed: set the decoding size to at least 2MB for AST2600
In AST2600, the unit of SPI CEx decoding range register is 1MB, and end address offset is set to the acctual offset - 1MB. If the flash only has 1MB, the end address will has same value as start address, which will causing unexpected errors. This patch set the decoding size to at least 2MB to avoid decoding errors. Tested: root@bletchley:~# dmesg | grep "aspeed-smc 1e631000.spi: CE0 window" [ 59.328134] aspeed-smc 1e631000.spi: CE0 window resized to 2MB (AST2600 Decoding) [ 59.343001] aspeed-smc 1e631000.spi: CE0 window [ 0x50000000 - 0x50200000 ] 2MB root@bletchley:~# devmem 0x1e631030 0x00100000 Tested-by: Jae Hyun Yoo <quic_jaehyoo@quicinc.com> Signed-off-by: Potin Lai <potin.lai@quantatw.com> [ clg : Ported on new spi-mem driver ] Signed-off-by: Cédric Le Goater <clg@kaod.org> Link: https://lore.kernel.org/r/20220509175616.1089346-12-clg@kaod.org Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/spi-aspeed-smc.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/spi/spi-aspeed-smc.c b/drivers/spi/spi-aspeed-smc.c
index 35f6934847b7..496f3e1e9079 100644
--- a/drivers/spi/spi-aspeed-smc.c
+++ b/drivers/spi/spi-aspeed-smc.c
@@ -474,6 +474,8 @@ static int aspeed_spi_set_window(struct aspeed_spi *aspi,
* is correct.
*/
static const struct aspeed_spi_data ast2500_spi_data;
+static const struct aspeed_spi_data ast2600_spi_data;
+static const struct aspeed_spi_data ast2600_fmc_data;
static int aspeed_spi_chip_adjust_window(struct aspeed_spi_chip *chip,
u32 local_offset, u32 size)
@@ -497,6 +499,17 @@ static int aspeed_spi_chip_adjust_window(struct aspeed_spi_chip *chip,
chip->cs, size >> 20);
}
+ /*
+ * The decoding size of AST2600 SPI controller should set at
+ * least 2MB.
+ */
+ if ((aspi->data == &ast2600_spi_data || aspi->data == &ast2600_fmc_data) &&
+ size < SZ_2M) {
+ size = SZ_2M;
+ dev_info(aspi->dev, "CE%d window resized to %dMB (AST2600 Decoding)",
+ chip->cs, size >> 20);
+ }
+
aspeed_spi_get_windows(aspi, windows);
/* Adjust this chip window */