gpio: atmel: Add the PIO4 driver support

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index 0000000..8bb4b12
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2015 Atmel Corporation.
+ *		      Wenyou Yang <[email protected]>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __ATMEL_PIO4_H
+#define __ATMEL_PIO4_H
+
+#ifndef __ASSEMBLY__
+
+struct atmel_pio4_port {
+	u32 mskr;		/* 0x00 PIO Mask Register */
+	u32 cfgr;		/* 0x04 PIO Configuration Register */
+	u32 pdsr;		/* 0x08 PIO Pin Data Status Register */
+	u32 locksr;		/* 0x0C PIO Lock Status Register */
+	u32 sodr;		/* 0x10 PIO Set Output Data Register */
+	u32 codr;		/* 0x14 PIO Clear Output Data Register */
+	u32 odsr;		/* 0x18 PIO Output Data Status Register */
+	u32 reserved0;
+	u32 ier;		/* 0x20 PIO Interrupt Enable Register */
+	u32 idr;		/* 0x24 PIO Interrupt Disable Register */
+	u32 imr;		/* 0x28 PIO Interrupt Mask Register */
+	u32 isr;		/* 0x2C PIO Interrupt Status Register */
+	u32 reserved1[3];
+	u32 iofr;		/* 0x3C PIO I/O Freeze Register */
+};
+
+#endif
+
+#define AT91_PIO_PORTA		0x0
+#define AT91_PIO_PORTB		0x1
+#define AT91_PIO_PORTC		0x2
+#define AT91_PIO_PORTD		0x3
+
+int atmel_pio4_set_gpio(u32 port, u32 pin, u32 use_pullup);
+int atmel_pio4_set_a_periph(u32 port, u32 pin, u32 use_pullup);
+int atmel_pio4_set_b_periph(u32 port, u32 pin, u32 use_pullup);
+int atmel_pio4_set_c_periph(u32 port, u32 pin, u32 use_pullup);
+int atmel_pio4_set_d_periph(u32 port, u32 pin, u32 use_pullup);
+int atmel_pio4_set_e_periph(u32 port, u32 pin, u32 use_pullup);
+int atmel_pio4_set_f_periph(u32 port, u32 pin, u32 use_pullup);
+int atmel_pio4_set_g_periph(u32 port, u32 pin, u32 use_pullup);
+int atmel_pio4_set_pio_output(u32 port, u32 pin, u32 value);
+int atmel_pio4_get_pio_input(u32 port, u32 pin);
+
+#endif

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