We do not have to set the LCR register every time we change the
baud-rate. We just need to set it up once in the probe function.
Signed-off-by: Masahiro Yamada <yamad...@jp.panasonic.com>
---
Changes in v5:
- Newly addd
Changes in v4: None
Changes in v3: None
Changes in v2: None
drivers/serial/serial_uniphier.c | 20 +++++++++++---------
1 file changed, 11 insertions(+), 9 deletions(-)
diff --git a/drivers/serial/serial_uniphier.c b/drivers/serial/serial_uniphier.c
index 327e0dc..a6bd27f 100644
--- a/drivers/serial/serial_uniphier.c
+++ b/drivers/serial/serial_uniphier.c
@@ -45,12 +45,6 @@ static int uniphier_serial_setbrg(struct udevice *dev, int
baudrate)
struct uniphier_serial __iomem *port = uniphier_serial_port(dev);
const unsigned int mode_x_div = 16;
unsigned int divisor;
- u32 tmp;
-
- tmp = readl(&port->lcr_mcr);
- tmp &= ~LCR_MASK;
- tmp |= UART_LCR_WLEN8 << LCR_SHIFT;
- writel(tmp, &port->lcr_mcr);
divisor = DIV_ROUND_CLOSEST(plat->uartclk, mode_x_div * baudrate);
@@ -93,14 +87,22 @@ static int uniphier_serial_pending(struct udevice *dev,
bool input)
static int uniphier_serial_probe(struct udevice *dev)
{
+ u32 tmp;
struct uniphier_serial_private_data *priv = dev_get_priv(dev);
struct uniphier_serial_platform_data *plat = dev_get_platdata(dev);
+ struct uniphier_serial __iomem *port;
- priv->membase = map_sysmem(plat->base, sizeof(struct uniphier_serial));
-
- if (!priv->membase)
+ port = map_sysmem(plat->base, sizeof(struct uniphier_serial));
+ if (!port)
return -ENOMEM;
+ priv->membase = port;
+
+ tmp = readl(&port->lcr_mcr);
+ tmp &= ~LCR_MASK;
+ tmp |= UART_LCR_WLEN8 << LCR_SHIFT;
+ writel(tmp, &port->lcr_mcr);
+
return 0;
}
--
1.9.1
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