mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-18 01:03:05 +00:00
508e1aa58c
There is a unused variable ret, due to which we are getting sparse warning as below. warning: variable 'ret' set but not used [-Wunused-but-set-variable]. Return ret incase of error. Signed-off-by: Algapally Santosh Sagar <santoshsagar.algapally@amd.com> Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma@amd.com> Link: https://lore.kernel.org/r/20230120053617.32463-3-ashok.reddy.soma@amd.com Signed-off-by: Michal Simek <michal.simek@amd.com>
156 lines
3.3 KiB
C
156 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* ZynqMP GPIO modepin driver
|
|
*
|
|
* Copyright (C) 2021 Xilinx, Inc.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <errno.h>
|
|
#include <asm/io.h>
|
|
#include <asm/gpio.h>
|
|
#include <dm.h>
|
|
#include <asm/arch/hardware.h>
|
|
#include <zynqmp_firmware.h>
|
|
|
|
#define OUTEN(pin) (BIT(0) << (pin))
|
|
#define INVAL(pin) (BIT(4) << (pin))
|
|
#define OUTVAL(pin) (BIT(8) << (pin))
|
|
|
|
#define ZYNQMP_CRL_APB_BOOTPIN_CTRL_MASK 0xF0F
|
|
#define ZYNQMP_CRL_APB_BOOT_PIN_CTRL (ZYNQMP_CRL_APB_BASEADDR + \
|
|
(0x250U))
|
|
|
|
static int get_gpio_modepin(u32 *ret_payload)
|
|
{
|
|
return xilinx_pm_request(PM_MMIO_READ, ZYNQMP_CRL_APB_BOOT_PIN_CTRL,
|
|
0, 0, 0, ret_payload);
|
|
}
|
|
|
|
static int set_gpio_modepin(int val)
|
|
{
|
|
return xilinx_pm_request(PM_MMIO_WRITE, ZYNQMP_CRL_APB_BOOT_PIN_CTRL,
|
|
ZYNQMP_CRL_APB_BOOTPIN_CTRL_MASK,
|
|
val, 0, NULL);
|
|
}
|
|
|
|
static int modepin_gpio_direction_input(struct udevice *dev,
|
|
unsigned int offset)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int modepin_gpio_set_value(struct udevice *dev, unsigned int offset,
|
|
int value)
|
|
{
|
|
u32 ret_payload[PAYLOAD_ARG_CNT];
|
|
u32 out_val = 0;
|
|
int ret;
|
|
|
|
ret = get_gpio_modepin(ret_payload);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (value)
|
|
out_val = OUTVAL(offset) | ret_payload[1];
|
|
else
|
|
out_val = ~OUTVAL(offset) & ret_payload[1];
|
|
|
|
return set_gpio_modepin(out_val);
|
|
}
|
|
|
|
static int modepin_gpio_direction_output(struct udevice *dev,
|
|
unsigned int offset, int value)
|
|
{
|
|
u32 ret_payload[PAYLOAD_ARG_CNT];
|
|
u32 out_en = 0;
|
|
int ret;
|
|
|
|
ret = get_gpio_modepin(ret_payload);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (value)
|
|
out_en = OUTEN(offset) | ret_payload[1];
|
|
else
|
|
out_en = ~OUTEN(offset) & ret_payload[1];
|
|
|
|
ret = set_gpio_modepin(out_en);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return modepin_gpio_set_value(dev, offset, value);
|
|
}
|
|
|
|
static int modepin_gpio_xlate(struct udevice *dev, struct gpio_desc *desc,
|
|
struct ofnode_phandle_args *args)
|
|
{
|
|
desc->offset = args->args[0];
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int modepin_gpio_get_value(struct udevice *dev, unsigned int offset)
|
|
{
|
|
u32 ret_payload[PAYLOAD_ARG_CNT];
|
|
int ret;
|
|
|
|
ret = get_gpio_modepin(ret_payload);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return (INVAL(offset) & ret_payload[1]) ? 1 : 0;
|
|
}
|
|
|
|
static int modepin_gpio_get_function(struct udevice *dev, unsigned int offset)
|
|
{
|
|
u32 ret_payload[PAYLOAD_ARG_CNT];
|
|
int ret;
|
|
|
|
ret = get_gpio_modepin(ret_payload);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return (OUTEN(offset) & ret_payload[1]) ? GPIOF_OUTPUT : GPIOF_INPUT;
|
|
}
|
|
|
|
static const struct dm_gpio_ops modepin_gpio_ops = {
|
|
.direction_input = modepin_gpio_direction_input,
|
|
.direction_output = modepin_gpio_direction_output,
|
|
.get_value = modepin_gpio_get_value,
|
|
.set_value = modepin_gpio_set_value,
|
|
.get_function = modepin_gpio_get_function,
|
|
.xlate = modepin_gpio_xlate,
|
|
};
|
|
|
|
static int modepin_gpio_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 = 4;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct udevice_id modepin_gpio_ids[] = {
|
|
{ .compatible = "xlnx,zynqmp-gpio-modepin",},
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(modepin_gpio) = {
|
|
.name = "modepin_gpio",
|
|
.id = UCLASS_GPIO,
|
|
.ops = &modepin_gpio_ops,
|
|
.of_match = modepin_gpio_ids,
|
|
.probe = modepin_gpio_probe,
|
|
};
|