[PATCH v2 3/4] spi: nxp_fspi: Support i.MX8DXL flexspi

[Ye Li]

According to i.MX8DXL A1 errata ERR050601, concurrent read accesses
from the A35 cores to the peripherals within the LSIO subsystem
(region 0_5DXX_XXXX) and address spaces in the regions
[0_0000_0000 – 0_1BFF_FFFF] and [4_0000_0000 – 4_3FFF_FFFF] can collide
and cause data corruption in the returned data, with no failure report.
Even a single A35 core accessing both these regions can trigger the issue
because an A35 core can have more than one parallel read operation in
progress.

The flexspi0 AHB memory is in LSIO region mentioned in above errata.
So we can't use AHB read, only can read data from FIFO.
Add the compatible string for 8DXL and use a flag for the IPS read.

Signed-off-by: Ye Li <ye.li at nxp.com>
---
 drivers/spi/nxp_fspi.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/spi/nxp_fspi.c b/drivers/spi/nxp_fspi.c
index 6e2aee4672b..3dfb54b1968 100644
--- a/drivers/spi/nxp_fspi.c
+++ b/drivers/spi/nxp_fspi.c
@@ -346,6 +346,15 @@ static const struct nxp_fspi_devtype_data imx8qxp_data = {
 	.little_endian = true,  /* little-endian    */
 };
 
+static const struct nxp_fspi_devtype_data imx8dxl_data = {
+	.rxfifo = SZ_512,       /* (64  * 64 bits)  */
+	.txfifo = SZ_1K,        /* (128 * 64 bits)  */
+	.ahb_buf_size = SZ_2K,  /* (256 * 64 bits)  */
+	.quirks = FSPI_QUIRK_USE_IP_ONLY,
+	.lut_num = 32,
+	.little_endian = true,  /* little-endian    */
+};
+
 struct nxp_fspi {
 	struct udevice *dev;
 	void __iomem *iobase;
@@ -1091,6 +1100,7 @@ static const struct udevice_id nxp_fspi_ids[] = {
 	{ .compatible = "nxp,imx8mm-fspi", .data = (ulong)&imx8mm_data, },
 	{ .compatible = "nxp,imx8mp-fspi", .data = (ulong)&imx8mm_data, },
 	{ .compatible = "nxp,imx8qxp-fspi", .data = (ulong)&imx8qxp_data, },
+	{ .compatible = "nxp,imx8dxl-fspi", .data = (ulong)&imx8dxl_data, },
 	{ .compatible = "nxp,imxrt1170-fspi", .data = (ulong)&imxrt1170_data, },
 	{ }
 };
-- 
2.37.1