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gpio: Add DM GPIO driver for Marvell MVEBU

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This patch adds a DM GPIO driver for the Marvell MVEBU SoCs. There are
other non-DM drivers that might be used on these platforms. But this
patch creates a new DM driver. Which will be used by all Armada XP/38x
boards. Other MVEBU SoC (Kirkwood / Orion) may follow once they
support DM as well.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Dirk Eibach <dirk.eibach@gdsys.cc>
Cc: Phil Sutter <phil@nwl.cc>
Cc: Kevin Smith <kevin.smith@elecsyscorp.com>
Cc: Luka Perkov <luka.perkov@sartura.hr>
Cc: Tom Rini <trini@konsulko.com>
Reviewed-by: Kevin Smith <kevin.smith@elecsyscorp.com>
Tested-by: Kevin Smith <kevin.smith@elecsyscorp.com>
Signed-off-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Stefan Roese 2016-02-12 13:46:50 +01:00
parent 44876bf9e8
commit 704d9a645e
3 changed files with 127 additions and 0 deletions
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7
drivers/gpio/Kconfig
View file

@ -105,4 +105,11 @@ config PIC32_GPIO
help
Say yes here to support Microchip PIC32 GPIOs.
config MVEBU_GPIO
bool "Marvell MVEBU GPIO driver"
depends on DM_GPIO && ARCH_MVEBU
default y
help
Say yes here to support Marvell MVEBU (Armada XP/38x) GPIOs.
endmenu

1
drivers/gpio/Makefile
View file

@ -49,3 +49,4 @@ obj-$(CONFIG_ZYNQ_GPIO) += zynq_gpio.o
obj-$(CONFIG_VYBRID_GPIO) += vybrid_gpio.o
obj-$(CONFIG_HIKEY_GPIO) += hi6220_gpio.o
obj-$(CONFIG_PIC32_GPIO) += pic32_gpio.o
obj-$(CONFIG_MVEBU_GPIO) += mvebu_gpio.o

119
drivers/gpio/mvebu_gpio.c Normal file
View file

@ -0,0 +1,119 @@
/*
* Copyright (C) 2016 Stefan Roese <sr@denx.de>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <asm/gpio.h>
#include <asm/io.h>
#include <errno.h>
DECLARE_GLOBAL_DATA_PTR;
#define MVEBU_GPIOS_PER_BANK 32
struct mvebu_gpio_regs {
u32 data_out;
u32 io_conf;
u32 blink_en;
u32 in_pol;
u32 data_in;
};
struct mvebu_gpio_priv {
struct mvebu_gpio_regs *regs;
char name[2];
};
static int mvebu_gpio_direction_input(struct udevice *dev, unsigned int gpio)
{
struct mvebu_gpio_priv *priv = dev_get_priv(dev);
struct mvebu_gpio_regs *regs = priv->regs;
setbits_le32(&regs->io_conf, BIT(gpio));
return 0;
}
static int mvebu_gpio_direction_output(struct udevice *dev, unsigned gpio,
int value)
{
struct mvebu_gpio_priv *priv = dev_get_priv(dev);
struct mvebu_gpio_regs *regs = priv->regs;
clrbits_le32(&regs->io_conf, BIT(gpio));
return 0;
}
static int mvebu_gpio_get_function(struct udevice *dev, unsigned gpio)
{
struct mvebu_gpio_priv *priv = dev_get_priv(dev);
struct mvebu_gpio_regs *regs = priv->regs;
u32 val;
val = readl(&regs->io_conf) & BIT(gpio);
if (val)
return GPIOF_INPUT;
else
return GPIOF_OUTPUT;
}
static int mvebu_gpio_set_value(struct udevice *dev, unsigned gpio,
int value)
{
struct mvebu_gpio_priv *priv = dev_get_priv(dev);
struct mvebu_gpio_regs *regs = priv->regs;
if (value)
setbits_le32(&regs->data_out, BIT(gpio));
else
clrbits_le32(&regs->data_out, BIT(gpio));
return 0;
}
static int mvebu_gpio_get_value(struct udevice *dev, unsigned gpio)
{
struct mvebu_gpio_priv *priv = dev_get_priv(dev);
struct mvebu_gpio_regs *regs = priv->regs;
return !!(readl(&regs->data_in) & BIT(gpio));
}
static int mvebu_gpio_probe(struct udevice *dev)
{
struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
struct mvebu_gpio_priv *priv = dev_get_priv(dev);
priv->regs = (struct mvebu_gpio_regs *)dev_get_addr(dev);
uc_priv->gpio_count = MVEBU_GPIOS_PER_BANK;
priv->name[0] = 'A' + dev->req_seq;
uc_priv->bank_name = priv->name;
return 0;
}
static const struct dm_gpio_ops mvebu_gpio_ops = {
.direction_input = mvebu_gpio_direction_input,
.direction_output = mvebu_gpio_direction_output,
.get_function = mvebu_gpio_get_function,
.get_value = mvebu_gpio_get_value,
.set_value = mvebu_gpio_set_value,
};
static const struct udevice_id mvebu_gpio_ids[] = {
{ .compatible = "marvell,orion-gpio" },
{ }
};
U_BOOT_DRIVER(gpio_mvebu) = {
.name = "gpio_mvebu",
.id = UCLASS_GPIO,
.of_match = mvebu_gpio_ids,
.ops = &mvebu_gpio_ops,
.probe = mvebu_gpio_probe,
.priv_auto_alloc_size = sizeof(struct mvebu_gpio_priv),
};