xen/arm: debug-exynos4210: Remove early_uart_init

The function early_uart_init contains specific initialization for the
Arndale Board 5250.

Usually U-boot as already setup the UART correctly (ie. clock, baud rate...)
so we don't have to do again.

Futhermore, this code won't work on new platform such as the Arndale Octa.

Signed-off-by: Julien Grall <julien.grall@linaro.org>
Cc: HyonYoung Choi <commani@gmail.com>
Cc: Meng Xu <xumengpanda@gmail.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>

diff --git a/xen/arch/arm/Rules.mk b/xen/arch/arm/Rules.mk
index c551afbf47cc7b2f00a7253c79917b44dfb994d0..8d5624b21cee13f9dae61fbdece068f372cfae66 100644 (file)
--- a/xen/arch/arm/Rules.mk
+++ b/xen/arch/arm/Rules.mk
@@ -53,7 +53,6 @@ EARLY_UART_BASE_ADDRESS := 0x1c090000
 endif
 ifeq ($(CONFIG_EARLY_PRINTK), exynos5250)
 EARLY_PRINTK_INC := exynos4210
-EARLY_PRINTK_INIT_UART := y
 EARLY_PRINTK_BAUD := 115200
 EARLY_UART_BASE_ADDRESS := 0x12c20000
 endif

diff --git a/xen/arch/arm/arm32/debug-exynos4210.inc b/xen/arch/arm/arm32/debug-exynos4210.inc
index 39f2db360b14c1c18b49b35ec9ea494e91b17b51..752942de0d2e1a2cf8d49c8e96d676ba63d02feb 100644 (file)
--- a/xen/arch/arm/arm32/debug-exynos4210.inc
+++ b/xen/arch/arm/arm32/debug-exynos4210.inc
@@ -18,38 +18,6 @@
 
 #include <asm/exynos4210-uart.h>
 
-/* Exynos 5 UART initialization
- * rb: register which contains the UART base address
- * rc: scratch register 1
- * rd: scratch register 2 */
-.macro early_uart_init rb rc rd
-        /* init clock */
-        ldr   \rc, =0x10020000
-        /* select MPLL (800MHz) source clock */
-        ldr   \rd, [\rc, #0x250]
-        and   \rd, \rd, #(~(0xf<<8))
-        orr   \rd, \rd, #(0x6<<8)
-        str   \rd, [\rc, #0x250]
-        /* ratio 800/(7+1) */
-        ldr   \rd, [\rc, #0x558]
-        and   \rd, \rd, #(~(0xf<<8))
-        orr   \rd, \rd, #(0x7<<8)
-        str   \rd, [\rc, #0x558]
-
-        mov   \rc, #(100000000 / EARLY_PRINTK_BAUD % 16)
-        str   \rc, [\rb, #UFRACVAL]     /* -> UFRACVAL (Baud divisor fraction) */
-        mov   \rc, #(100000000 / EARLY_PRINTK_BAUD / 16 - 1)
-        str   \rc, [\rb, #UBRDIV]       /* -> UBRDIV (Baud divisor integer) */
-        mov   \rc, #3                   /* 8n1 */
-        str   \rc, [\rb, #ULCON]        /* -> (Line control) */
-        ldr   \rc, =UCON_TX_IRQ         /* TX IRQMODE */
-        str   \rc, [\rb, #UCON]         /* -> (Control Register) */
-        mov   \rc, #0x0
-        str   \rc, [\rb, #UFCON]        /* disable FIFO */
-        mov   \rc, #0x0
-        str   \rc, [\rb, #UMCON]        /* no auto flow control */
-.endm
-
 /* Exynos 5 UART wait UART to be ready to transmit
  * rb: register which contains the UART base address
  * rc: scratch register */