diff --git a/br-ext-chip-ingenic/board/t31/kernel/patches/0009-optional-disable-jz-gmac.patch b/br-ext-chip-ingenic/board/t31/kernel/patches/0009-optional-disable-jz-gmac.patch
new file mode 100644
index 00000000..cf86ac15
--- /dev/null
+++ b/br-ext-chip-ingenic/board/t31/kernel/patches/0009-optional-disable-jz-gmac.patch
@@ -0,0 +1,71 @@
+--- a/arch/mips/xburst/soc-t31/common/gpio.c
++++ b/arch/mips/xburst/soc-t31/common/gpio.c
+@@ -85,6 +85,7 @@
+ #endif
+ extern int __init gpio_customized_init(void);
+ extern void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume);
++extern int disable_gmac;
+ 
+ struct jzgpio_state {
+ 	unsigned int pxint;
+@@ -972,6 +973,15 @@
+ 			break;
+ 		}
+ 
++		if (!strcmp(g->name,"gmac_pb") && disable_gmac){
++			pr_info("Skipping GMAC GPIO setup\n");
++			continue;
++		}
++		if (!strcmp(g->name,"msc1-pB") && !disable_gmac){
++			pr_info("Skipping MSC1_PB GPIO setup\n");
++			continue;
++		}
++
+ 		jz = &jz_gpio_chips[g->port];
+ 		if (GPIO_AS_FUNC(g->func)) {
+ 			if(jz->dev_map[0] & g->pins) {
+--- a/arch/mips/xburst/soc-t31/common/platform.c
++++ b/arch/mips/xburst/soc-t31/common/platform.c
+@@ -1032,6 +1032,16 @@
+ 	*size = ispmem_size;
+ }
+ 
++int disable_gmac = 0;
++EXPORT_SYMBOL(disable_gmac);
++
++static int __init extras_parse(char *str)
++{
++	disable_gmac = 1;
++	return 0;
++}
++__setup("nogmac", extras_parse);
++
+ #ifndef CONFIG_PROC_FS
+ #error NOT config procfs
+ #endif
+--- a/drivers/net/ethernet/ingenic/jz_mac_v13.c
++++ b/drivers/net/ethernet/ingenic/jz_mac_v13.c
+@@ -2392,8 +2392,11 @@
+ 
+ #define JZ_GMAC_BASE 0xb34b0000
+ 
++extern int disable_gmac;
++
+ static int __init jz_mac_init(void)
+ {
++if (!disable_gmac){
+ #ifndef CONFIG_MDIO_GPIO
+ 	int ret;
+ #endif
+@@ -2420,6 +2423,11 @@
+ 
+ #endif
+ }
++else{
++	pr_info("JZ GMAC disabled\n");
++	return -ENODEV;
++}
++}
+ 
+ module_init(jz_mac_init);
+ 
diff --git a/br-ext-chip-ingenic/board/t31/kernel/t31.generic.config b/br-ext-chip-ingenic/board/t31/kernel/t31.generic.config
index c4c9148c..d4d5b072 100644
--- a/br-ext-chip-ingenic/board/t31/kernel/t31.generic.config
+++ b/br-ext-chip-ingenic/board/t31/kernel/t31.generic.config
@@ -1436,12 +1436,12 @@ CONFIG_JZMMC_V12_MMC0=y
 # CONFIG_JZMMC_V12_MMC0_PA_4BIT is not set
 # CONFIG_JZMMC_V12_MMC0_PA_8BIT is not set
 CONFIG_JZMMC_V12_MMC0_PB_4BIT=y
-CONFIG_MMC0_MAX_FREQ=24000000
+CONFIG_MMC0_MAX_FREQ=48000000
 # CONFIG_MMC0_PIO_MODE is not set
 CONFIG_JZMMC_V12_MMC1=y
 # CONFIG_JZMMC_V12_MMC1_PD_4BIT is not set
-# CONFIG_JZMMC_V12_MMC1_PB_4BIT is not set
-CONFIG_JZMMC_V12_MMC1_PC_4BIT=y
+CONFIG_JZMMC_V12_MMC1_PB_4BIT=y
+# CONFIG_JZMMC_V12_MMC1_PC_4BIT is not set
 CONFIG_MMC1_MAX_FREQ=24000000
 # CONFIG_MMC1_PIO_MODE is not set
 # CONFIG_JZMMC_V12_MMC2 is not set