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ACPI / LPSS: Provide build-in properties of the UART 

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>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Heikki Krogerus 2016-08-23 11:33:27 +03:00 committed by Rafael J. Wysocki
parent 7ff55d174c
commit a5565cf238
1 changed files with 17 additions and 0 deletions
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17
drivers/acpi/acpi_lpss.c
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@ -75,6 +75,7 @@ struct lpss_device_desc {
const char *clk_con_id;
unsigned int prv_offset;
size_t prv_size_override;
struct property_entry *properties;
void (*setup)(struct lpss_private_data *pdata);
};
@ -163,11 +164,19 @@ static const struct lpss_device_desc lpt_i2c_dev_desc = {
.prv_offset = 0x800,
};
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 const struct lpss_device_desc lpt_uart_dev_desc = {
.flags = LPSS_CLK | LPSS_CLK_GATE | LPSS_CLK_DIVIDER | LPSS_LTR,
.clk_con_id = "baudclk",
.prv_offset = 0x800,
.setup = lpss_uart_setup,
.properties = uart_properties,
};
static const struct lpss_device_desc lpt_sdio_dev_desc = {
@ -189,6 +198,7 @@ static const struct lpss_device_desc byt_uart_dev_desc = {
.clk_con_id = "baudclk",
.prv_offset = 0x800,
.setup = lpss_uart_setup,
.properties = uart_properties,
};
static const struct lpss_device_desc bsw_uart_dev_desc = {
@ -197,6 +207,7 @@ static const struct lpss_device_desc bsw_uart_dev_desc = {
.clk_con_id = "baudclk",
.prv_offset = 0x800,
.setup = lpss_uart_setup,
.properties = uart_properties,
};
static const struct lpss_device_desc byt_spi_dev_desc = {
@ -440,6 +451,12 @@ static int acpi_lpss_create_device(struct acpi_device *adev,
goto err_out;
}
if (dev_desc->properties) {
ret = device_add_properties(&adev->dev, dev_desc->properties);
if (ret)
goto err_out;
}
adev->driver_data = pdata;
pdev = acpi_create_platform_device(adev);
if (!IS_ERR_OR_NULL(pdev)) {