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author | Tom Rini <trini@konsulko.com> | 2022-04-04 10:45:33 -0400 |
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committer | Tom Rini <trini@konsulko.com> | 2022-04-04 10:48:44 -0400 |
commit | 01f1ab67f38882dc7665a0a6eca4bbeba6d84f81 (patch) | |
tree | 31b1febefe82731d94571f7442877c039efb602c /drivers/gpio/gpio_slg7xl45106.c | |
parent | e4b6ebd3de982ae7185dbf689a030e73fd06e0d2 (diff) | |
parent | 8221c52d88fbe84ca9692dc23827e21403c952e8 (diff) | |
download | u-boot-01f1ab67f38882dc7665a0a6eca4bbeba6d84f81.zip u-boot-01f1ab67f38882dc7665a0a6eca4bbeba6d84f81.tar.gz u-boot-01f1ab67f38882dc7665a0a6eca4bbeba6d84f81.tar.bz2 |
Merge branch 'next'
Signed-off-by: Tom Rini <trini@konsulko.com>
Diffstat (limited to 'drivers/gpio/gpio_slg7xl45106.c')
-rw-r--r-- | drivers/gpio/gpio_slg7xl45106.c | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/drivers/gpio/gpio_slg7xl45106.c b/drivers/gpio/gpio_slg7xl45106.c new file mode 100644 index 0000000..2cbf748 --- /dev/null +++ b/drivers/gpio/gpio_slg7xl45106.c @@ -0,0 +1,115 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * slg7xl45106_i2c_gpo driver + * + * Copyright (C) 2021 Xilinx, Inc. + */ + +#include <common.h> +#include <errno.h> +#include <asm/io.h> +#include <asm/gpio.h> +#include <dm.h> +#include <i2c.h> +#include <asm/arch/hardware.h> + +#define SLG7XL45106_REG 0xdb + +static int slg7xl45106_i2c_gpo_direction_input(struct udevice *dev, + unsigned int offset) +{ + return 0; +} + +static int slg7xl45106_i2c_gpo_xlate(struct udevice *dev, + struct gpio_desc *desc, + struct ofnode_phandle_args *args) +{ + desc->offset = (unsigned int)args->args[0]; + + return 0; +} + +static int slg7xl45106_i2c_gpo_set_value(struct udevice *dev, + unsigned int offset, int value) +{ + int ret; + u8 val; + + ret = dm_i2c_read(dev, SLG7XL45106_REG, &val, 1); + if (ret) + return ret; + + if (value) + val |= BIT(offset); + else + val &= ~BIT(offset); + + return dm_i2c_write(dev, SLG7XL45106_REG, &val, 1); +} + +static int slg7xl45106_i2c_gpo_direction_output(struct udevice *dev, + unsigned int offset, int value) +{ + return slg7xl45106_i2c_gpo_set_value(dev, offset, value); +} + +static int slg7xl45106_i2c_gpo_get_value(struct udevice *dev, + unsigned int offset) +{ + int ret; + u8 val; + + ret = dm_i2c_read(dev, SLG7XL45106_REG, &val, 1); + if (ret) + return ret; + + return !!(val & BIT(offset)); +} + +static int slg7xl45106_i2c_gpo_get_function(struct udevice *dev, + unsigned int offset) +{ + return GPIOF_OUTPUT; +} + +static const struct dm_gpio_ops slg7xl45106_i2c_gpo_ops = { + .direction_input = slg7xl45106_i2c_gpo_direction_input, + .direction_output = slg7xl45106_i2c_gpo_direction_output, + .get_value = slg7xl45106_i2c_gpo_get_value, + .set_value = slg7xl45106_i2c_gpo_set_value, + .get_function = slg7xl45106_i2c_gpo_get_function, + .xlate = slg7xl45106_i2c_gpo_xlate, +}; + +static int slg7xl45106_i2c_gpo_probe(struct udevice *dev) +{ + struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev); + const void *label_ptr; + + label_ptr = dev_read_prop(dev, "label", NULL); + if (label_ptr) { + uc_priv->bank_name = strdup(label_ptr); + if (!uc_priv->bank_name) + return -ENOMEM; + } else { + uc_priv->bank_name = dev->name; + } + + uc_priv->gpio_count = 8; + + return 0; +} + +static const struct udevice_id slg7xl45106_i2c_gpo_ids[] = { + { .compatible = "dlg,slg7xl45106",}, + { } +}; + +U_BOOT_DRIVER(slg7xl45106_i2c_gpo) = { + .name = "slg7xl45106_i2c_gpo", + .id = UCLASS_GPIO, + .ops = &slg7xl45106_i2c_gpo_ops, + .of_match = slg7xl45106_i2c_gpo_ids, + .probe = slg7xl45106_i2c_gpo_probe, +}; |