summaryrefslogtreecommitdiff
path: root/include/linux/spi/max7301.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/linux/spi/max7301.h')
-rw-r--r--include/linux/spi/max7301.h35
1 files changed, 35 insertions, 0 deletions
diff --git a/include/linux/spi/max7301.h b/include/linux/spi/max7301.h
new file mode 100644
index 000000000..bcaa2f762
--- /dev/null
+++ b/include/linux/spi/max7301.h
@@ -0,0 +1,35 @@
+#ifndef LINUX_SPI_MAX7301_H
+#define LINUX_SPI_MAX7301_H
+
+#include <linux/gpio.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 int __max730x_remove(struct device *dev);
+extern int __max730x_probe(struct max7301 *ts);
+#endif