e9a0130879
Change-Id: I40f8b4c7cbc55e16929b1f40d18bb5a9c19845da Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/29289 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Patrick Georgi <pgeorgi@google.com>
70 lines
1.8 KiB
C
70 lines
1.8 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2018 Siemens AG
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <device/i2c_bus.h>
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#include <device/device.h>
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#include "pca9538.h"
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#include "chip.h"
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/* This function can be used from outside the chip driver to read input. */
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uint8_t pca9538_read_input(void)
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{
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struct device *dev = pca9538_get_dev();
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if (!dev)
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return 0;
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else
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return (uint8_t)(i2c_dev_readb_at(dev, INPUT_REG));
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}
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/* This function can be used from outside the chip driver to set output. */
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void pca9538_set_output(uint8_t val)
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{
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struct device *dev = pca9538_get_dev();
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if (dev)
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i2c_dev_writeb_at(dev, OUTPUT_REG, val);
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}
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static void pca9538_init(struct device *dev)
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{
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struct drivers_i2c_pca9538_config *config = dev->chip_info;
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if (!config)
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return;
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/* Set up registers as requested in devicetree. */
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i2c_dev_writeb_at(dev, INPUT_INVERT_REG, config->invert);
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i2c_dev_writeb_at(dev, OUTPUT_REG, config->out_val);
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i2c_dev_writeb_at(dev, IO_CONFIG_REG, config->in_out);
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}
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static struct device_operations pca9538_ops = {
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.read_resources = DEVICE_NOOP,
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.set_resources = DEVICE_NOOP,
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.enable_resources = DEVICE_NOOP,
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.init = pca9538_init,
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.final = DEVICE_NOOP
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};
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static void pca9538_enable(struct device *dev)
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{
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dev->ops = &pca9538_ops;
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}
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struct chip_operations drivers_i2c_pca9538_ops = {
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CHIP_NAME("PCA9538")
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.enable_dev = pca9538_enable
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};
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