serial: ns16550: Read reg-io-width from device tree
Cache the value of the reg-io-width property for the future use.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c
index 25b9d17..9d78b1f 100644
--- a/drivers/serial/ns16550.c
+++ b/drivers/serial/ns16550.c
@@ -446,6 +446,7 @@
plat->reg_offset = dev_read_u32_default(dev, "reg-offset", 0);
plat->reg_shift = dev_read_u32_default(dev, "reg-shift", 0);
+ plat->reg_width = dev_read_u32_default(dev, "reg-io-width", 1);
err = clk_get_by_index(dev, 0, &clk);
if (!err) {
diff --git a/include/ns16550.h b/include/ns16550.h
index f565645..22b89e4 100644
--- a/include/ns16550.h
+++ b/include/ns16550.h
@@ -49,11 +49,13 @@
* struct ns16550_platdata - information about a NS16550 port
*
* @base: Base register address
+ * @reg_width: IO accesses size of registers (in bytes)
* @reg_shift: Shift size of registers (0=byte, 1=16bit, 2=32bit...)
* @clock: UART base clock speed in Hz
*/
struct ns16550_platdata {
unsigned long base;
+ int reg_width;
int reg_shift;
int reg_offset;
int clock;