ARM: EXYNOS: Remove legacy UART initialization code

This patch removes legacy UART initialization code that was used to
set up UART platform devices when booting with ATAGS, which is not
supported on Exynos any more.
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/mach-exynos/common.c

@@ -69,7 +69,6 @@ static const char name_exynos5440[] = "EXYNOS5440";
 static void exynos4_map_io(void);
 static void exynos5_map_io(void);
 static void exynos5440_map_io(void);
-static void exynos4_init_uarts(struct s3c2410_uartcfg *cfg, int no);
 static int exynos_init(void);
 
 unsigned long xxti_f = 0, xusbxti_f = 0;
@@ -79,21 +78,18 @@ static struct cpu_table cpu_ids[] __initdata = {
 		.idcode		= EXYNOS4210_CPU_ID,
 		.idmask		= EXYNOS4_CPU_MASK,
 		.map_io		= exynos4_map_io,
-		.init_uarts	= exynos4_init_uarts,
 		.init		= exynos_init,
 		.name		= name_exynos4210,
 	}, {
 		.idcode		= EXYNOS4212_CPU_ID,
 		.idmask		= EXYNOS4_CPU_MASK,
 		.map_io		= exynos4_map_io,
-		.init_uarts	= exynos4_init_uarts,
 		.init		= exynos_init,
 		.name		= name_exynos4212,
 	}, {
 		.idcode		= EXYNOS4412_CPU_ID,
 		.idmask		= EXYNOS4_CPU_MASK,
 		.map_io		= exynos4_map_io,
-		.init_uarts	= exynos4_init_uarts,
 		.init		= exynos_init,
 		.name		= name_exynos4412,
 	}, {
@@ -602,16 +598,3 @@ static int __init exynos_init(void)
 
 	return device_register(&exynos4_dev);
 }
-
-/* uart registration process */
-
-static void __init exynos4_init_uarts(struct s3c2410_uartcfg *cfg, int no)
-{
-	struct s3c2410_uartcfg *tcfg = cfg;
-	u32 ucnt;
-
-	for (ucnt = 0; ucnt < no; ucnt++, tcfg++)
-		tcfg->has_fracval = 1;
-
-	s3c24xx_init_uartdevs("exynos4210-uart", exynos4_uart_resources, cfg, no);
-}

arch/arm/plat-samsung/init.c

@@ -87,7 +87,7 @@ void __init s3c24xx_init_clocks(int xtal)
 }
 
 /* uart management */
-
+#if IS_ENABLED(CONFIG_SAMSUNG_ATAGS)
 static int nr_uarts __initdata = 0;
 
 static struct s3c2410_uartcfg uart_cfgs[CONFIG_SERIAL_SAMSUNG_UARTS];
@@ -134,11 +134,12 @@ void __init s3c24xx_init_uarts(struct s3c2410_uartcfg *cfg, int no)
 	if (cpu == NULL)
 		return;
 
-	if (cpu->init_uarts == NULL) {
+	if (cpu->init_uarts == NULL && IS_ENABLED(CONFIG_SAMSUNG_ATAGS)) {
 		printk(KERN_ERR "s3c24xx_init_uarts: cpu has no uart init\n");
 	} else
 		(cpu->init_uarts)(cfg, no);
 }
+#endif
 
 static int __init s3c_arch_init(void)
 {
@@ -152,8 +153,9 @@ static int __init s3c_arch_init(void)
 	ret = (cpu->init)();
 	if (ret != 0)
 		return ret;
-
+#if IS_ENABLED(CONFIG_SAMSUNG_ATAGS)
 	ret = platform_add_devices(s3c24xx_uart_devs, nr_uarts);
+#endif
 	return ret;
 }