ARM: samsung: allow serial driver to be disabled

If CONFIG_SERIAL_SAMSUNG is disabled, we run into build errors
with some samsung platforms. This adds a couple of #ifdef
statements to hopefully deal with this more gracefully.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Cc: Tomasz Figa <tomasz.figa@gmail.com>
Cc: Ben Dooks <ben-linux@fluff.org>

3 files changed, 19 insertions, 3 deletions

diff --git a/arch/arm/mach-s3c64xx/irq-pm.c b/arch/arm/mach-s3c64xx/irq-pm.c
index 1649c0d1c1b8..ddf65583a5d8 100644
--- a/arch/arm/mach-s3c64xx/irq-pm.c
+++ b/arch/arm/mach-s3c64xx/irq-pm.c
@@ -55,7 +55,13 @@ static struct irq_grp_save {
         u32     mask;
 } eint_grp_save[5];
 
-static u32 irq_uart_mask[CONFIG_SERIAL_SAMSUNG_UARTS];
+#ifndef CONFIG_SERIAL_SAMSUNG_UARTS
+#define SERIAL_SAMSUNG_UARTS 0
+#else
+#define SERIAL_SAMSUNG_UARTS CONFIG_SERIAL_SAMSUNG_UARTS
+#endif
+
+static u32 irq_uart_mask[SERIAL_SAMSUNG_UARTS];
 
 static int s3c64xx_irq_pm_suspend(void)
 {
@@ -66,7 +72,7 @@ static int s3c64xx_irq_pm_suspend(void)
 
         s3c_pm_do_save(irq_save, ARRAY_SIZE(irq_save));
 
-        for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++)
+        for (i = 0; i < SERIAL_SAMSUNG_UARTS; i++)
                 irq_uart_mask[i] = __raw_readl(S3C_VA_UARTx(i) + S3C64XX_UINTM);
 
         for (i = 0; i < ARRAY_SIZE(eint_grp_save); i++, grp++) {
@@ -87,7 +93,7 @@ static void s3c64xx_irq_pm_resume(void)
 
         s3c_pm_do_restore(irq_save, ARRAY_SIZE(irq_save));
 
-        for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++)
+        for (i = 0; i < SERIAL_SAMSUNG_UARTS; i++)
                 __raw_writel(irq_uart_mask[i], S3C_VA_UARTx(i) + S3C64XX_UINTM);
 
         for (i = 0; i < ARRAY_SIZE(eint_grp_save); i++, grp++) {
diff --git a/arch/arm/mach-s5p64x0/irq-pm.c b/arch/arm/mach-s5p64x0/irq-pm.c
index 3e6f2456ee9d..d5f0fd66b635 100644
--- a/arch/arm/mach-s5p64x0/irq-pm.c
+++ b/arch/arm/mach-s5p64x0/irq-pm.c
@@ -34,7 +34,9 @@ static struct irq_grp_save {
         u32     mask;
 } eint_grp_save[4];
 
+#ifdef CONFIG_SERIAL_SAMSUNG
 static u32 irq_uart_mask[CONFIG_SERIAL_SAMSUNG_UARTS];
+#endif
 
 static int s5p64x0_irq_pm_suspend(void)
 {
@@ -45,8 +47,10 @@ static int s5p64x0_irq_pm_suspend(void)
 
         s3c_pm_do_save(irq_save, ARRAY_SIZE(irq_save));
 
+#ifdef CONFIG_SERIAL_SAMSUNG
         for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++)
                 irq_uart_mask[i] = __raw_readl(S3C_VA_UARTx(i) + S3C64XX_UINTM);
+#endif
 
         for (i = 0; i < ARRAY_SIZE(eint_grp_save); i++, grp++) {
                 grp->con = __raw_readl(S5P64X0_EINT12CON + (i * 4));
@@ -66,8 +70,10 @@ static void s5p64x0_irq_pm_resume(void)
 
         s3c_pm_do_restore(irq_save, ARRAY_SIZE(irq_save));
 
+#ifdef CONFIG_SERIAL_SAMSUNG
         for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++)
                 __raw_writel(irq_uart_mask[i], S3C_VA_UARTx(i) + S3C64XX_UINTM);
+#endif
 
         for (i = 0; i < ARRAY_SIZE(eint_grp_save); i++, grp++) {
                 __raw_writel(grp->con, S5P64X0_EINT12CON + (i * 4));
diff --git a/arch/arm/plat-samsung/init.c b/arch/arm/plat-samsung/init.c
index aa9511b6914a..a30df396ca34 100644
--- a/arch/arm/plat-samsung/init.c
+++ b/arch/arm/plat-samsung/init.c
@@ -97,7 +97,9 @@ void __init s3c24xx_init_clocks(int xtal)
 #if IS_ENABLED(CONFIG_SAMSUNG_ATAGS)
 static int nr_uarts __initdata = 0;
 
+#ifdef CONFIG_SERIAL_SAMSUNG_UARTS
 static struct s3c2410_uartcfg uart_cfgs[CONFIG_SERIAL_SAMSUNG_UARTS];
+#endif
 
 /* s3c24xx_init_uartdevs
  *
@@ -112,6 +114,7 @@ void __init s3c24xx_init_uartdevs(char *name,
                                   struct s3c24xx_uart_resources *res,
                                   struct s3c2410_uartcfg *cfg, int no)
 {
+#ifdef CONFIG_SERIAL_SAMSUNG_UARTS
         struct platform_device *platdev;
         struct s3c2410_uartcfg *cfgptr = uart_cfgs;
         struct s3c24xx_uart_resources *resp;
@@ -134,6 +137,7 @@ void __init s3c24xx_init_uartdevs(char *name,
         }
 
         nr_uarts = no;
+#endif
 }
 
 void __init s3c24xx_init_uarts(struct s3c2410_uartcfg *cfg, int no)