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serial: 8250_dw: Switch to use acpi_dev_present()

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Special settings for APMC0D08 are applied when device is present
in the system. To check its presence we may use acpi_dev_present()
instead of current open coded variant.

Cc: Feng Kan <fkan@apm.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andy Shevchenko 2018-03-01 13:41:29 +02:00 • committed by Greg Kroah-Hartman
parent 9d1a50a2cc
commit 7d6e2143be
1 changed files with 5 additions and 11 deletions
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16
drivers/tty/serial/8250/8250_dw.c
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@ -357,17 +357,11 @@ static void dw8250_quirks(struct uart_port *p, struct dw8250_data *data)
p->serial_in = dw8250_serial_in32be;
p->serial_out = dw8250_serial_out32be;
}
} else if (has_acpi_companion(p->dev)) {
const struct acpi_device_id *id;
id = acpi_match_device(p->dev->driver->acpi_match_table,
p->dev);
if (id && !strcmp(id->id, "APMC0D08")) {
p->iotype = UPIO_MEM32;
p->regshift = 2;
p->serial_in = dw8250_serial_in32;
data->uart_16550_compatible = true;
}
} else if (acpi_dev_present("APMC0D08", NULL, -1)) {
p->iotype = UPIO_MEM32;
p->regshift = 2;
p->serial_in = dw8250_serial_in32;
data->uart_16550_compatible = true;
}
/* Platforms with iDMA */