[PATCH] ARM: stm32mp: define stm32_serial_putc for use with pbl_set_putc

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

Unlike other debug_ll headers, such as i.MX's or AT91, the STM32MP1 header
only defined PUTC_LL, but no function suitable for use with
pbl_set_putc.

Remedy that, so PBL entry points can benefit from CONFIG_PBL_CONSOLE and
while at it, add the missing header that defines BIT().

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 include/mach/stm32mp/debug_ll.h | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/include/mach/stm32mp/debug_ll.h b/include/mach/stm32mp/debug_ll.h
index 03bb60a239c1..0d88910c1375 100644
--- a/include/mach/stm32mp/debug_ll.h
+++ b/include/mach/stm32mp/debug_ll.h
@@ -5,6 +5,7 @@
 
 #include <io.h>
 #include <mach/stm32mp/stm32.h>
+#include <linux/bitops.h>
 
 #define DEBUG_LL_UART_ADDR	STM32_UART4_BASE
 
@@ -18,13 +19,18 @@
 
 #define USART_ISR_TXE	BIT(7)
 
-static inline void PUTC_LL(int c)
+static inline void stm32_serial_putc(void *ctx, int c)
 {
-	void __iomem *base = IOMEM(DEBUG_LL_UART_ADDR);
+	void __iomem *base = IOMEM(ctx);
 
 	writel(c, base + TDR_OFFSET);
 
 	while ((readl(base + ISR_OFFSET) & USART_ISR_TXE) == 0);
 }
 
+static inline void PUTC_LL(int c)
+{
+	stm32_serial_putc(IOMEM(DEBUG_LL_UART_ADDR), c);
+}
+
 #endif /* __MACH_STM32MP1_DEBUG_LL_H */
-- 
2.39.2