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Merge git://git.denx.de/u-boot-i2c
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commit
c977226840
1 changed files with 39 additions and 1 deletions
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@ -1,5 +1,6 @@
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/*
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* Copyright (C) 2015 - 2016 Xilinx, Inc.
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* Copyright (C) 2017 National Instruments Corp
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* Written by Michal Simek
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*
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* SPDX-License-Identifier: GPL-2.0+
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@ -9,7 +10,8 @@
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#include <dm.h>
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#include <errno.h>
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#include <i2c.h>
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#include <asm/gpio.h>
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#include <asm-generic/gpio.h>
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DECLARE_GLOBAL_DATA_PTR;
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@ -30,6 +32,7 @@ struct chip_desc {
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struct pca954x_priv {
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u32 addr; /* I2C mux address */
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u32 width; /* I2C mux width - number of busses */
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struct gpio_desc gpio_mux_reset;
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};
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static const struct chip_desc chips[] = {
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@ -105,10 +108,45 @@ static int pca954x_ofdata_to_platdata(struct udevice *dev)
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return 0;
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}
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static int pca954x_probe(struct udevice *dev)
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{
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if (IS_ENABLED(CONFIG_DM_GPIO)) {
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struct pca954x_priv *priv = dev_get_priv(dev);
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int err;
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err = gpio_request_by_name(dev, "reset-gpios", 0,
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&priv->gpio_mux_reset, GPIOD_IS_OUT);
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/* it's optional so only bail if we get a real error */
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if (err && (err != -ENOENT))
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return err;
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/* dm will take care of polarity */
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if (dm_gpio_is_valid(&priv->gpio_mux_reset))
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dm_gpio_set_value(&priv->gpio_mux_reset, 0);
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}
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return 0;
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}
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static int pca954x_remove(struct udevice *dev)
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{
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if (IS_ENABLED(CONFIG_DM_GPIO)) {
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struct pca954x_priv *priv = dev_get_priv(dev);
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if (dm_gpio_is_valid(&priv->gpio_mux_reset))
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dm_gpio_free(dev, &priv->gpio_mux_reset);
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}
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return 0;
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}
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U_BOOT_DRIVER(pca954x) = {
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.name = "pca954x",
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.id = UCLASS_I2C_MUX,
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.of_match = pca954x_ids,
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.probe = pca954x_probe,
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.remove = pca954x_remove,
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.ops = &pca954x_ops,
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.ofdata_to_platdata = pca954x_ofdata_to_platdata,
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.priv_auto_alloc_size = sizeof(struct pca954x_priv),
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