From fb40abe2f25336b653d3c8ee787756e4260acd4c Mon Sep 17 00:00:00 2001 From: nirim000 Date: Sat, 2 Jul 2022 19:37:02 -0400 Subject: Pca9505/6 driver (#17333) --- drivers/gpio/pca9505.h | 67 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 drivers/gpio/pca9505.h (limited to 'drivers/gpio/pca9505.h') diff --git a/drivers/gpio/pca9505.h b/drivers/gpio/pca9505.h new file mode 100644 index 0000000000..732ddb88ea --- /dev/null +++ b/drivers/gpio/pca9505.h @@ -0,0 +1,67 @@ +// Copyright 2022 nirim000 +// SPDX-License-Identifier: GPL-2.0-or-later + +#pragma once + +#include +#include + +/** + * Port ID + */ +typedef enum { + PCA9505_PORT0, + PCA9505_PORT1, + PCA9505_PORT2, + PCA9505_PORT3, + PCA9505_PORT4, +} pca9505_port_t; + +/** + * Helpers for set_config + */ +enum { + ALL_NORMAL = 0, + ALL_INVERTED = 0xFF, +}; + +/** + * Helpers for set_config + */ +enum { + ALL_OUTPUT = 0, + ALL_INPUT = 0xFF, +}; + +/** + * Helpers for set_output + */ +enum { + ALL_LOW = 0, + ALL_HIGH = 0xFF, +}; + +/** + * Init expander and any other dependent drivers + */ +void pca9505_init(uint8_t slave_addr); + +/** + * Configure input/output to a given port + */ +bool pca9505_set_config(uint8_t slave_addr, pca9505_port_t port, uint8_t conf); + +/** + * Configure polarity to a given port + */ +bool pca9505_set_polarity(uint8_t slave_addr, pca9505_port_t port, uint8_t conf); + +/** + * Write high/low to a given port + */ +bool pca9505_set_output(uint8_t slave_addr, pca9505_port_t port, uint8_t conf); + +/** + * Read state of a given port + */ +bool pca9505_readPins(uint8_t slave_addr, pca9505_port_t port, uint8_t* ret); -- cgit v1.2.3