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d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commitc8ffd1356d, reversing changes made to2ee6f3a5f7. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
112 lines
2.6 KiB
C
112 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Faraday Technology's FTGPIO010 controller.
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*/
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#include <common.h>
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#include <dm.h>
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#include <asm/io.h>
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#include <asm/gpio.h>
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struct ftgpio010_regs {
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u32 out;
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u32 in;
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u32 direction; // 1 - output
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u32 reserved;
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u32 set;
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u32 clear;
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};
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struct ftgpio010_plat {
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struct ftgpio010_regs __iomem *regs;
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};
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static int ftgpio010_direction_input(struct udevice *dev, unsigned int pin)
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{
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struct ftgpio010_plat *plat = dev_get_plat(dev);
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struct ftgpio010_regs *const regs = plat->regs;
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clrbits_le32(®s->direction, 1 << pin);
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return 0;
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}
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static int ftgpio010_direction_output(struct udevice *dev, unsigned int pin,
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int val)
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{
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struct ftgpio010_plat *plat = dev_get_plat(dev);
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struct ftgpio010_regs *const regs = plat->regs;
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/* change the data first, then the direction. to avoid glitch */
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out_le32(val ? ®s->set : ®s->clear, 1 << pin);
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setbits_le32(®s->direction, 1 << pin);
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return 0;
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}
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static int ftgpio010_get_value(struct udevice *dev, unsigned int pin)
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{
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struct ftgpio010_plat *plat = dev_get_plat(dev);
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struct ftgpio010_regs *const regs = plat->regs;
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return in_le32(®s->in) >> pin & 1;
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}
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static int ftgpio010_set_value(struct udevice *dev, unsigned int pin, int val)
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{
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struct ftgpio010_plat *plat = dev_get_plat(dev);
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struct ftgpio010_regs *const regs = plat->regs;
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out_le32(val ? ®s->set : ®s->clear, 1 << pin);
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return 0;
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}
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static int ftgpio010_get_function(struct udevice *dev, unsigned int pin)
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{
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struct ftgpio010_plat *plat = dev_get_plat(dev);
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struct ftgpio010_regs *const regs = plat->regs;
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if (in_le32(®s->direction) >> pin & 1)
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return GPIOF_OUTPUT;
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return GPIOF_INPUT;
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}
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static int ftgpio010_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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uc_priv->gpio_count = ofnode_read_u32_default(dev_ofnode(dev),
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"nr-gpios", 32);
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return 0;
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}
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static int ftgpio010_of_to_plat(struct udevice *dev)
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{
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struct ftgpio010_plat *plat = dev_get_plat(dev);
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plat->regs = dev_read_addr_ptr(dev);
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return 0;
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}
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static const struct dm_gpio_ops ftgpio010_ops = {
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.direction_input = ftgpio010_direction_input,
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.direction_output = ftgpio010_direction_output,
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.get_value = ftgpio010_get_value,
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.set_value = ftgpio010_set_value,
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.get_function = ftgpio010_get_function,
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};
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static const struct udevice_id ftgpio010_ids[] = {
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{ .compatible = "faraday,ftgpio010" },
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{ }
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};
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U_BOOT_DRIVER(ftgpio010) = {
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.name = "ftgpio010",
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.id = UCLASS_GPIO,
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.of_match = ftgpio010_ids,
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.ops = &ftgpio010_ops,
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.of_to_plat = ftgpio010_of_to_plat,
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.plat_auto = sizeof(struct ftgpio010_plat),
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.probe = ftgpio010_probe,
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};
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