[U-Boot] [PATCH v2 1/2] arm: serial: Add debug UART capability to the pl01x driver

[Sergey Temerkhanov]

This patch adds an ability to use pl01x as a debug UART. It must
be configured like other types of debug UARTs

Signed-off-by: Sergey Temerkhanov <s.temerkhanov at gmail.com>
Signed-off-by: Radha Mohan Chintakuntla <rchintakuntla at cavium.com>

---

Changes in v2:
- Broke down into 2 patches
- Minor changes to accomodate Kconfig options

 drivers/serial/serial_pl01x.c | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/drivers/serial/serial_pl01x.c b/drivers/serial/serial_pl01x.c
index e6ceaa1..e83a44c 100644
--- a/drivers/serial/serial_pl01x.c
+++ b/drivers/serial/serial_pl01x.c
@@ -391,3 +391,31 @@ U_BOOT_DRIVER(serial_pl01x) = {
 };
 
 #endif
+
+#if defined(CONFIG_DEBUG_UART_PL010) || defined(CONFIG_DEBUG_UART_PL011)
+
+#include <debug_uart.h>
+
+void debug_uart_init(void)
+{
+#ifndef CONFIG_DEBUG_UART_SKIP_INIT
+	struct pl01x_regs *regs = (struct pl01x_regs *)CONFIG_DEBUG_UART_BASE;
+	enum pl01x_type type = CONFIG_IS_ENABLED(DEBUG_UART_PL011) ?
+				TYPE_PL011 : TYPE_PL010;
+
+	pl01x_generic_serial_init(regs, type);
+	pl01x_generic_setbrg(regs, type,
+			     CONFIG_DEBUG_UART_CLOCK, CONFIG_BAUDRATE);
+#endif
+}
+
+static inline void _debug_uart_putc(int ch)
+{
+	struct pl01x_regs *regs = (struct pl01x_regs *)CONFIG_DEBUG_UART_BASE;
+
+	pl01x_putc(regs, ch);
+}
+
+DEBUG_UART_FUNCS
+
+#endif
-- 
2.2.0