spi: xlp: Add ACPI support for Vulcan SPI controller

Add ACPI support for SPI controller on Broadcom Vulcan ARM64.

Signed-off-by: Kamlakant Patel <kamlakant.patel@broadcom.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 12 insertions, 1 deletions

diff --git a/drivers/spi/spi-xlp.c b/drivers/spi/spi-xlp.c
index 8f04feca6ee3..4071a729eb2f 100644
--- a/drivers/spi/spi-xlp.c
+++ b/drivers/spi/spi-xlp.c
@@ -11,6 +11,7 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  */
+#include <linux/acpi.h>
 #include <linux/clk.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
@@ -405,8 +406,9 @@ static int xlp_spi_probe(struct platform_device *pdev)
         clk = devm_clk_get(&pdev->dev, NULL);
         if (IS_ERR(clk)) {
                 dev_err(&pdev->dev, "could not get spi clock\n");
-                return -ENODEV;
+                return PTR_ERR(clk);
         }
+
         xspi->spi_clk = clk_get_rate(clk);
 
         master = spi_alloc_master(&pdev->dev, 0);
@@ -437,6 +439,14 @@ static int xlp_spi_probe(struct platform_device *pdev)
         return 0;
 }
 
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id xlp_spi_acpi_match[] = {
+        { "BRCM900D", 0 },
+        { },
+};
+MODULE_DEVICE_TABLE(acpi, xlp_spi_acpi_match);
+#endif
+
 static const struct of_device_id xlp_spi_dt_id[] = {
         { .compatible = "netlogic,xlp832-spi" },
         { },
@@ -447,6 +457,7 @@ static struct platform_driver xlp_spi_driver = {
         .driver = {
                 .name   = "xlp-spi",
                 .of_match_table = xlp_spi_dt_id,
+                .acpi_match_table = ACPI_PTR(xlp_spi_acpi_match),
         },
 };
 module_platform_driver(xlp_spi_driver);