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>

diff --git a/arch/mips/ath79/dev-common.c b/arch/mips/ath79/dev-common.c
index 3b82e325bebfbe552e07cedb1b30a66ba6eb90be..f4956f809072e37f975ee1dd2ac9d3885c425422 100644 (file)
--- 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 = {