[U-Boot] [PATCH 03/11] serial: atmel_usart: Use fixed clock value in SPL version

[Stefan Roese <sr@denx.de>]

This patch adds an alterative SPL version of atmel_serial_enable_clk().
This enables the usage of this driver without full clock support (in
drivers and DT nodes). This saves some space in the SPL image.

If some boards need a different clock than the one provided with this
patch, then support for this needs to be added later.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Heiko Schocher <hs@denx.de>
Cc: Andreas Bießmann <andreas@biessmann.org>
Cc: Eugen Hristev <eugen.hristev@microchip.com>
---
 drivers/serial/atmel_usart.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/serial/atmel_usart.c b/drivers/serial/atmel_usart.c
index aa8cdff840..049172baef 100644
--- a/drivers/serial/atmel_usart.c
+++ b/drivers/serial/atmel_usart.c
@@ -218,6 +218,17 @@ static const struct dm_serial_ops atmel_serial_ops = {
 	.setbrg = atmel_serial_setbrg,
 };
 
+#ifdef CONFIG_SPL_BUILD
+static int atmel_serial_enable_clk(struct udevice *dev)
+{
+	struct atmel_serial_priv *priv = dev_get_priv(dev);
+
+	/* Use fixed clock value in SPL */
+	priv->usart_clk_rate = 132096000;
+
+	return 0;
+}
+#else
 static int atmel_serial_enable_clk(struct udevice *dev)
 {
 	struct atmel_serial_priv *priv = dev_get_priv(dev);
@@ -245,6 +256,7 @@ static int atmel_serial_enable_clk(struct udevice *dev)
 
 	return 0;
 }
+#endif
 
 static int atmel_serial_probe(struct udevice *dev)
 {
-- 
2.21.0