[PATCH 1/3] ACPI / APD: Provide build-in properties of the UART

[Heikki Krogerus <heikki.krogerus@linux.intel.com>]

The UART driver, dw8250.c, needs some details regarding the
Designware UART. For ACPI enumerated devices the values are
hard-coded, but since the driver also reads the values from
device properties, providing them with build-in properties.
This allows us to later remove the hard-coded values from
the driver.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Cc: Ken Xue <Ken.Xue@amd.com>
---
 drivers/acpi/acpi_apd.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/acpi/acpi_apd.c b/drivers/acpi/acpi_apd.c
index c80c8f8..a51dbef 100644
--- a/drivers/acpi/acpi_apd.c
+++ b/drivers/acpi/acpi_apd.c
@@ -42,6 +42,7 @@ struct apd_private_data;
 struct apd_device_desc {
 	unsigned int flags;
 	unsigned int fixed_clk_rate;
+	struct property_entry *properties;
 	int (*setup)(struct apd_private_data *pdata);
 };
 
@@ -67,6 +68,9 @@ static int acpi_apd_setup(struct apd_private_data *pdata)
 		pdata->clk = clk;
 	}
 
+	if (pdata->properties)
+		return device_add_properties(&pdata->adev->dev,
+					     pdata->properties);
 	return 0;
 }
 
@@ -76,9 +80,17 @@ static struct apd_device_desc cz_i2c_desc = {
 	.fixed_clk_rate = 133000000,
 };
 
+static struct property_entry uart_properties[] = {
+	PROPERTY_ENTRY_U32("reg-io-width", 4),
+	PROPERTY_ENTRY_U32("reg-shift", 2),
+	PROPERTY_ENTRY_BOOL("snps,uart-16550-compatible"),
+	{ },
+};
+
 static struct apd_device_desc cz_uart_desc = {
 	.setup = acpi_apd_setup,
 	.fixed_clk_rate = 48000000,
+	.properties = uart_properties,
 };
 #endif
 
-- 
2.8.1