arm: serial: Add debug UART capability to the pl01x driver

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@gmail.com>
Signed-off-by: Radha Mohan Chintakuntla <rchintakuntla@cavium.com>
[trini: Update for _debug_uart_init change]
Acked-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Rini <trini@konsulko.com>

diff --git a/drivers/serial/serial_pl01x.c b/drivers/serial/serial_pl01x.c
index 3a5c1d0eaabcd514752eb6c139af95ce17dd0bcc..552c945264c8d549c6da6fbbb311beb188fcb66c 100644 (file)
--- a/drivers/serial/serial_pl01x.c
+++ b/drivers/serial/serial_pl01x.c
@@ -367,3 +367,31 @@ U_BOOT_DRIVER(serial_pl01x) = {
 };
 
 #endif
+
+#if defined(CONFIG_DEBUG_UART_PL010) || defined(CONFIG_DEBUG_UART_PL011)
+
+#include <debug_uart.h>
+
+static 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