spi: dw-mmio: add ACPI support

The Hisilicon Hip08 platform, that uses ACPI, has this controller.
Let's add ACPI support for DW SPI MMIO-based host.

The ACPI ID used is "HISI0173" for the Designware SPI controller of
Hisilicon Hip08 platform.

Signed-off-by: Jay Fang <f.fangjian@huawei.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

2 files changed, 9 insertions, 0 deletions

diff --git a/drivers/spi/spi-dw-mmio.c b/drivers/spi/spi-dw-mmio.c
index 3ffb6a40fe0c..d0dd7814e997 100644
--- a/drivers/spi/spi-dw-mmio.c
+++ b/drivers/spi/spi-dw-mmio.c
@@ -20,6 +20,7 @@
 #include <linux/of.h>
 #include <linux/of_gpio.h>
 #include <linux/of_platform.h>
+#include <linux/acpi.h>
 #include <linux/property.h>
 #include <linux/regmap.h>
 
@@ -243,12 +244,19 @@ static const struct of_device_id dw_spi_mmio_of_match[] = {
 };
 MODULE_DEVICE_TABLE(of, dw_spi_mmio_of_match);
 
+static const struct acpi_device_id dw_spi_mmio_acpi_match[] = {
+        {"HISI0173", 0},
+        {},
+};
+MODULE_DEVICE_TABLE(acpi, dw_spi_mmio_acpi_match);
+
 static struct platform_driver dw_spi_mmio_driver = {
         .probe          = dw_spi_mmio_probe,
         .remove         = dw_spi_mmio_remove,
         .driver         = {
                 .name   = DRIVER_NAME,
                 .of_match_table = dw_spi_mmio_of_match,
+                .acpi_match_table = ACPI_PTR(dw_spi_mmio_acpi_match),
         },
 };
 module_platform_driver(dw_spi_mmio_driver);
diff --git a/drivers/spi/spi-dw.c b/drivers/spi/spi-dw.c
index b705f2bdb8b9..2e822a56576a 100644
--- a/drivers/spi/spi-dw.c
+++ b/drivers/spi/spi-dw.c
@@ -507,6 +507,7 @@ int dw_spi_add_host(struct device *dev, struct dw_spi *dws)
         master->handle_err = dw_spi_handle_err;
         master->max_speed_hz = dws->max_freq;
         master->dev.of_node = dev->of_node;
+        master->dev.fwnode = dev->fwnode;
         master->flags = SPI_MASTER_GPIO_SS;
 
         if (dws->set_cs)