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e949e78948
In current slg7xl45106 gpio driver xlate() function we are not updating gpio flags from DT. Read the given flag from DT and update the gpio desc flags variable with required gpio direction state. Signed-off-by: T Karthik Reddy <t.karthik.reddy@xilinx.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com> Link: https://lore.kernel.org/r/a8d7b4799337bd99f61ace509889f02b192a9414.1648631275.git.michal.simek@xilinx.com
117 lines
2.5 KiB
C
117 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* slg7xl45106_i2c_gpo driver
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*
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* Copyright (C) 2021 Xilinx, Inc.
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*/
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#include <common.h>
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#include <errno.h>
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#include <asm/io.h>
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#include <asm/gpio.h>
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#include <dm.h>
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#include <i2c.h>
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#include <dt-bindings/gpio/gpio.h>
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#include <asm/arch/hardware.h>
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#define SLG7XL45106_REG 0xdb
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static int slg7xl45106_i2c_gpo_direction_input(struct udevice *dev,
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unsigned int offset)
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{
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return 0;
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}
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static int slg7xl45106_i2c_gpo_xlate(struct udevice *dev,
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struct gpio_desc *desc,
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struct ofnode_phandle_args *args)
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{
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desc->offset = (unsigned int)args->args[0];
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desc->flags = (args->args[1] & GPIO_ACTIVE_LOW ? GPIOD_ACTIVE_LOW : 0);
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return 0;
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}
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static int slg7xl45106_i2c_gpo_set_value(struct udevice *dev,
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unsigned int offset, int value)
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{
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int ret;
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u8 val;
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ret = dm_i2c_read(dev, SLG7XL45106_REG, &val, 1);
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if (ret)
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return ret;
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if (value)
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val |= BIT(offset);
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else
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val &= ~BIT(offset);
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return dm_i2c_write(dev, SLG7XL45106_REG, &val, 1);
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}
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static int slg7xl45106_i2c_gpo_direction_output(struct udevice *dev,
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unsigned int offset, int value)
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{
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return slg7xl45106_i2c_gpo_set_value(dev, offset, value);
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}
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static int slg7xl45106_i2c_gpo_get_value(struct udevice *dev,
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unsigned int offset)
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{
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int ret;
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u8 val;
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ret = dm_i2c_read(dev, SLG7XL45106_REG, &val, 1);
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if (ret)
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return ret;
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return !!(val & BIT(offset));
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}
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static int slg7xl45106_i2c_gpo_get_function(struct udevice *dev,
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unsigned int offset)
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{
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return GPIOF_OUTPUT;
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}
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static const struct dm_gpio_ops slg7xl45106_i2c_gpo_ops = {
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.direction_input = slg7xl45106_i2c_gpo_direction_input,
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.direction_output = slg7xl45106_i2c_gpo_direction_output,
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.get_value = slg7xl45106_i2c_gpo_get_value,
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.set_value = slg7xl45106_i2c_gpo_set_value,
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.get_function = slg7xl45106_i2c_gpo_get_function,
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.xlate = slg7xl45106_i2c_gpo_xlate,
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};
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static int slg7xl45106_i2c_gpo_probe(struct udevice *dev)
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{
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struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
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const void *label_ptr;
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label_ptr = dev_read_prop(dev, "label", NULL);
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if (label_ptr) {
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uc_priv->bank_name = strdup(label_ptr);
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if (!uc_priv->bank_name)
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return -ENOMEM;
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} else {
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uc_priv->bank_name = dev->name;
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}
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uc_priv->gpio_count = 8;
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return 0;
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}
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static const struct udevice_id slg7xl45106_i2c_gpo_ids[] = {
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{ .compatible = "dlg,slg7xl45106",},
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{ }
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};
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U_BOOT_DRIVER(slg7xl45106_i2c_gpo) = {
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.name = "slg7xl45106_i2c_gpo",
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.id = UCLASS_GPIO,
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.ops = &slg7xl45106_i2c_gpo_ops,
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.of_match = slg7xl45106_i2c_gpo_ids,
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.probe = slg7xl45106_i2c_gpo_probe,
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};
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