For the x86 machines a m25p80-compatible device have to be declared using
an ACPI table (which can be directly a part of the BIOS ACPI tables).
In this case it is necessary to add the device in the "of_device_id" structure
list, to permit the device name matching by the ACPI kernel functions.
This is an example of a SSDT table for the Everspin mr25h40:
DefinitionBlock ("mr25h40.aml", "SSDT", 5, "ASEMsp", "MR25H40", 1)
{
External (_SB.SPI1, DeviceObj)
Scope (\_SB.SPI1)
{
Device (NVR0)
{
Name (_HID, "PRP0001")
Name (_DDN, "Everspin MR25H40 MRAM")
Name (_CRS, ResourceTemplate () {
SpiSerialBus (
1, // Chip select
PolarityLow, // Chip select is
active low
FourWireMode, // Full duplex
8, // Bits per word is 8
(byte)
ControllerInitiated, // Don't care
10000000, // 10 MHz
ClockPolarityLow, // SPI mode 0
ClockPolarityLow
ClockPhaseFirst, // SPI mode 0
ClockPhaseFirst
"\\_SB.SPI1", // SPI host controller
0, // Must be 0
ResourceConsumer,
,
)
})
Name (_DSD, Package () {
ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
Package () {
Package () {"compatible", "mr25h40"},
}
})
}
}
}
Signed-off-by: Flavio Suligoi <[email protected]>
---
v1: - first patch version
drivers/mtd/devices/m25p80.c | 57 +++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 56 insertions(+), 1 deletion(-)
diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c
index c4a1d04..b5c7db8 100644
--- a/drivers/mtd/devices/m25p80.c
+++ b/drivers/mtd/devices/m25p80.c
@@ -312,9 +312,64 @@ MODULE_DEVICE_TABLE(spi, m25p_ids);
static const struct of_device_id m25p_of_table[] = {
/*
* Generic compatibility for SPI NOR that can be identified by the
- * JEDEC READ ID opcode (0x9F). Use this, if possible.
+ * JEDEC READ ID opcode (0x9F). Use this (jedec,spi-nor), if possible.
+ *
+ * The list of all flash devices is instead necessary in x86 machines,
+ * to use a "non-jedec device" inside the ACPI BIOS tables.
*/
{ .compatible = "jedec,spi-nor" },
+ { .compatible = "s25sl064a" },
+ { .compatible = "w25x16" },
+ { .compatible = "m25p10" },
+ { .compatible = "m25px64" },
+ { .compatible = "at25df321a" },
+ { .compatible = "at25df641" },
+ { .compatible = "at26df081a" },
+ { .compatible = "mx25l4005a" },
+ { .compatible = "mx25l1606e" },
+ { .compatible = "mx25l6405d" },
+ { .compatible = "mx25l12805d" },
+ { .compatible = "mx25l25635e" },
+ { .compatible = "mx66l51235l" },
+ { .compatible = "n25q064" },
+ { .compatible = "n25q128a11" },
+ { .compatible = "n25q128a13" },
+ { .compatible = "n25q512a" },
+ { .compatible = "s25fl256s1" },
+ { .compatible = "s25fl512s" },
+ { .compatible = "s25sl12801" },
+ { .compatible = "s25fl008k" },
+ { .compatible = "s25fl064k" },
+ { .compatible = "sst25vf040b" },
+ { .compatible = "sst25vf016b" },
+ { .compatible = "sst25vf032b" },
+ { .compatible = "sst25wf040" },
+ { .compatible = "m25p40" },
+ { .compatible = "m25p80" },
+ { .compatible = "m25p16" },
+ { .compatible = "m25p32" },
+ { .compatible = "m25p64" },
+ { .compatible = "m25p128" },
+ { .compatible = "w25x80" },
+ { .compatible = "w25x32" },
+ { .compatible = "w25q32" },
+ { .compatible = "w25q32dw" },
+ { .compatible = "w25q80bl" },
+ { .compatible = "w25q128" },
+ { .compatible = "w25q256" },
+ { .compatible = "m25p05-nonjedec" },
+ { .compatible = "m25p10-nonjedec" },
+ { .compatible = "m25p20-nonjedec" },
+ { .compatible = "m25p40-nonjedec" },
+ { .compatible = "m25p80-nonjedec" },
+ { .compatible = "m25p16-nonjedec" },
+ { .compatible = "m25p32-nonjedec" },
+ { .compatible = "m25p64-nonjedec" },
+ { .compatible = "m25p128-nonjedec" },
+ { .compatible = "mr25h128" },
+ { .compatible = "mr25h256" },
+ { .compatible = "mr25h10" },
+ { .compatible = "mr25h40" },
{}
};
MODULE_DEVICE_TABLE(of, m25p_of_table);
--
2.7.4
