ACPI / APD: Add APM X-Gene ACPI I2C device support

Add APM X-Gene ACPI I2C device support by hooks into existent
ACPI APD driver.  To fully enable support, require another
patch to add the X-Gene ACPI node into the DW I2C driver.

Signed-off-by: Loc Ho <lho@apm.com>
Reviewed-by: Ken Xue <Ken.Xue@amd.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/acpi/acpi_apd.c b/drivers/acpi/acpi_apd.c
index a450e7a..d507cf6 100644 (file)
--- a/drivers/acpi/acpi_apd.c
+++ b/drivers/acpi/acpi_apd.c
@@ -51,7 +51,7 @@ struct apd_private_data {
        const struct apd_device_desc *dev_desc;
 };
 
-#ifdef CONFIG_X86_AMD_PLATFORM_DEVICE
+#if defined(CONFIG_X86_AMD_PLATFORM_DEVICE) || defined(CONFIG_ARM64)
 #define APD_ADDR(desc) ((unsigned long)&desc)
 
 static int acpi_apd_setup(struct apd_private_data *pdata)
@@ -71,6 +71,7 @@ static int acpi_apd_setup(struct apd_private_data *pdata)
        return 0;
 }
 
+#ifdef CONFIG_X86_AMD_PLATFORM_DEVICE
 static struct apd_device_desc cz_i2c_desc = {
        .setup = acpi_apd_setup,
        .fixed_clk_rate = 133000000,
@@ -80,6 +81,14 @@ static struct apd_device_desc cz_uart_desc = {
        .setup = acpi_apd_setup,
        .fixed_clk_rate = 48000000,
 };
+#endif
+
+#ifdef CONFIG_ARM64
+static struct apd_device_desc xgene_i2c_desc = {
+       .setup = acpi_apd_setup,
+       .fixed_clk_rate = 100000000,
+};
+#endif
 
 #else
 
@@ -132,9 +141,14 @@ static int acpi_apd_create_device(struct acpi_device *adev,
 
 static const struct acpi_device_id acpi_apd_device_ids[] = {
        /* Generic apd devices */
+#ifdef CONFIG_X86_AMD_PLATFORM_DEVICE
        { "AMD0010", APD_ADDR(cz_i2c_desc) },
        { "AMD0020", APD_ADDR(cz_uart_desc) },
        { "AMD0030", },
+#endif
+#ifdef CONFIG_ARM64
+       { "APMC0D0F", APD_ADDR(xgene_i2c_desc) },
+#endif
        { }
 };