MIPS: ath79: register UART device for the AR933X SoCs

The AR933X SoCs does not have a 8250 compatible UART, they
are using a different UART core. Register a different platform
device for the different UART.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Cc: linux-mips@linux-mips.org
Cc: Kathy Giori <kgiori@qca.qualcomm.com>
Cc: "Luis R.  Rodriguez" <rodrigue@qca.qualcomm.com>
Patchwork: https://patchwork.linux-mips.org/patch/2528/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 36 insertions, 2 deletions

diff --git a/arch/mips/ath79/dev-common.c b/arch/mips/ath79/dev-common.c
index 3b82e325bebf..f4956f809072 100644
--- a/arch/mips/ath79/dev-common.c
+++ b/arch/mips/ath79/dev-common.c
@@ -20,6 +20,7 @@
 
 #include <asm/mach-ath79/ath79.h>
 #include <asm/mach-ath79/ar71xx_regs.h>
+#include <asm/mach-ath79/ar933x_uart_platform.h>
 #include "common.h"
 #include "dev-common.h"
 
@@ -54,6 +55,30 @@ static struct platform_device ath79_uart_device = {
         },
 };
 
+static struct resource ar933x_uart_resources[] = {
+        {
+                .start  = AR933X_UART_BASE,
+                .end    = AR933X_UART_BASE + AR71XX_UART_SIZE - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+        {
+                .start  = ATH79_MISC_IRQ_UART,
+                .end    = ATH79_MISC_IRQ_UART,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static struct ar933x_uart_platform_data ar933x_uart_data;
+static struct platform_device ar933x_uart_device = {
+        .name           = "ar933x-uart",
+        .id             = -1,
+        .resource       = ar933x_uart_resources,
+        .num_resources  = ARRAY_SIZE(ar933x_uart_resources),
+        .dev = {
+                .platform_data  = &ar933x_uart_data,
+        },
+};
+
 void __init ath79_register_uart(void)
 {
         struct clk *clk;
@@ -62,8 +87,17 @@ void __init ath79_register_uart(void)
         if (IS_ERR(clk))
                 panic("unable to get UART clock, err=%ld", PTR_ERR(clk));
 
-        ath79_uart_data[0].uartclk = clk_get_rate(clk);
-        platform_device_register(&ath79_uart_device);
+        if (soc_is_ar71xx() ||
+            soc_is_ar724x() ||
+            soc_is_ar913x()) {
+                ath79_uart_data[0].uartclk = clk_get_rate(clk);
+                platform_device_register(&ath79_uart_device);
+        } else if (soc_is_ar933x()) {
+                ar933x_uart_data.uartclk = clk_get_rate(clk);
+                platform_device_register(&ar933x_uart_device);
+        } else {
+                BUG();
+        }
 }
 
 static struct platform_device ath79_wdt_device = {