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Diffstat (limited to 'arch/sh/boards/mach-sdk7786/gpio.c')
-rw-r--r--arch/sh/boards/mach-sdk7786/gpio.c46
1 files changed, 46 insertions, 0 deletions
diff --git a/arch/sh/boards/mach-sdk7786/gpio.c b/arch/sh/boards/mach-sdk7786/gpio.c
new file mode 100644
index 0000000000..c4587d1013
--- /dev/null
+++ b/arch/sh/boards/mach-sdk7786/gpio.c
@@ -0,0 +1,46 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * SDK7786 FPGA USRGPIR Support.
+ *
+ * Copyright (C) 2010 Paul Mundt
+ */
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/gpio/driver.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/spinlock.h>
+#include <linux/io.h>
+#include <mach/fpga.h>
+
+#define NR_FPGA_GPIOS 8
+
+static const char *usrgpir_gpio_names[NR_FPGA_GPIOS] = {
+ "in0", "in1", "in2", "in3", "in4", "in5", "in6", "in7",
+};
+
+static int usrgpir_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
+{
+ /* always in */
+ return 0;
+}
+
+static int usrgpir_gpio_get(struct gpio_chip *chip, unsigned gpio)
+{
+ return !!(fpga_read_reg(USRGPIR) & (1 << gpio));
+}
+
+static struct gpio_chip usrgpir_gpio_chip = {
+ .label = "sdk7786-fpga",
+ .names = usrgpir_gpio_names,
+ .direction_input = usrgpir_gpio_direction_input,
+ .get = usrgpir_gpio_get,
+ .base = -1, /* don't care */
+ .ngpio = NR_FPGA_GPIOS,
+};
+
+static int __init usrgpir_gpio_setup(void)
+{
+ return gpiochip_add_data(&usrgpir_gpio_chip, NULL);
+}
+device_initcall(usrgpir_gpio_setup);