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36 lines
939 B
36 lines
939 B
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef LINUX_SPI_MAX7301_H |
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#define LINUX_SPI_MAX7301_H |
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#include <linux/gpio.h> |
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/* |
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* Some registers must be read back to modify. |
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* To save time we cache them here in memory |
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*/ |
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struct max7301 { |
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struct mutex lock; |
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u8 port_config[8]; /* field 0 is unused */ |
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u32 out_level; /* cached output levels */ |
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u32 input_pullup_active; |
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struct gpio_chip chip; |
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struct device *dev; |
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int (*write)(struct device *dev, unsigned int reg, unsigned int val); |
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int (*read)(struct device *dev, unsigned int reg); |
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}; |
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struct max7301_platform_data { |
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/* number assigned to the first GPIO */ |
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unsigned base; |
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/* |
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* bitmask controlling the pullup configuration, |
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* |
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* _note_ the 4 lowest bits are unused, because the first 4 |
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* ports of the controller are not used, too. |
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*/ |
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u32 input_pullup_active; |
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}; |
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extern int __max730x_remove(struct device *dev); |
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extern int __max730x_probe(struct max7301 *ts); |
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#endif
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