1 files changed, 36 insertions, 0 deletions
diff --git a/include/linux/spi/max7301.h b/include/linux/spi/max7301.h
new file mode 100644
index 000000000..e392c5375
--- /dev/null
+++ b/include/linux/spi/max7301.h
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef LINUX_SPI_MAX7301_H
+#define LINUX_SPI_MAX7301_H
+
+#include <linux/gpio/driver.h>
+
+/*
+ * Some registers must be read back to modify.
+ * To save time we cache them here in memory
+ */
+struct max7301 {
+	struct mutex	lock;
+	u8		port_config[8];	/* field 0 is unused */
+	u32		out_level;	/* cached output levels */
+	u32		input_pullup_active;
+	struct gpio_chip chip;
+	struct device *dev;
+	int (*write)(struct device *dev, unsigned int reg, unsigned int val);
+	int (*read)(struct device *dev, unsigned int reg);
+};
+
+struct max7301_platform_data {
+	/* number assigned to the first GPIO */
+	unsigned	base;
+	/*
+	 * bitmask controlling the pullup configuration,
+	 *
+	 * _note_ the 4 lowest bits are unused, because the first 4
+	 * ports of the controller are not used, too.
+	 */
+	u32		input_pullup_active;
+};
+
+extern void __max730x_remove(struct device *dev);
+extern int __max730x_probe(struct max7301 *ts);
+#endif