aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/ar71xx/patches-3.2/505-MIPS-ath79-add-ath79_gpio_function_select.patch
blob: 6b09fc0a9bc6570b0c3b8b433aba116789d53ebd (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
--- a/arch/mips/ath79/common.h
+++ b/arch/mips/ath79/common.h
@@ -26,6 +26,7 @@ void ath79_ddr_wb_flush(unsigned int reg
 void ath79_gpio_function_enable(u32 mask);
 void ath79_gpio_function_disable(u32 mask);
 void ath79_gpio_function_setup(u32 set, u32 clear);
+void ath79_gpio_output_select(unsigned gpio, u8 val);
 void ath79_gpio_init(void);
 
 #endif /* __ATH79_COMMON_H */
--- a/arch/mips/ath79/gpio.c
+++ b/arch/mips/ath79/gpio.c
@@ -184,6 +184,34 @@ void ath79_gpio_function_setup(u32 set,
 	spin_unlock_irqrestore(&ath79_gpio_lock, flags);
 }
 
+void __init ath79_gpio_output_select(unsigned gpio, u8 val)
+{
+	void __iomem *base = ath79_gpio_base;
+	unsigned long flags;
+	unsigned int reg;
+	u32 t, s;
+
+	BUG_ON(!soc_is_ar934x());
+
+	if (gpio >= AR934X_GPIO_COUNT)
+		return;
+
+	reg = AR934X_GPIO_REG_OUT_FUNC0 + 4 * (gpio / 4);
+	s = 8 * (gpio % 4);
+
+	spin_lock_irqsave(&ath79_gpio_lock, flags);
+
+	t = __raw_readl(base + reg);
+	t &= ~(0xff << s);
+	t |= val << s;
+	__raw_writel(t, base + reg);
+
+	/* flush write */
+	(void) __raw_readl(base + reg);
+
+	spin_unlock_irqrestore(&ath79_gpio_lock, flags);
+}
+
 void __init ath79_gpio_init(void)
 {
 	int err;