mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-16 09:48:16 +00:00
77224320f0
The behaviour of dev_read_addr_size() is surprising as it does not handle #address-cells and #size-cells but instead hardcodes the values based on sizeof(fdt_addr_t). This is different from dev_read_addr_size_index() and dev_read_addr_size_name() both of which do read the cell sizes from the device tree. Since dev_read_addr_size() is only used by a single driver and this driver is broken when CONFIG_FDT_64BIT does not match the address size in the device tree, fix the function to behave like all of the other similarly named functions. Drop the property name argument as the only caller passes "reg" and this is the expected property name matching the other similarly named functions. Signed-off-by: John Keeping <john@metanate.com> Reviewed-by: Simon Glass <sjg@chromium.org> Tested-by: Simon Glass <sjg@chromium.org> # chromebook_jerry Tested-by: Simon Glass <sjg@chromium.org> # chromebook_bob
151 lines
3.7 KiB
C
151 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* (C) Copyright 2017 Rockchip Electronics Co., Ltd
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <log.h>
|
|
#include <malloc.h>
|
|
#include <reset-uclass.h>
|
|
#include <linux/bitops.h>
|
|
#include <linux/io.h>
|
|
#include <asm/arch-rockchip/hardware.h>
|
|
#include <dm/device-internal.h>
|
|
#include <dm/lists.h>
|
|
/*
|
|
* Each reg has 16 bits reset signal for devices
|
|
* Note: Not including rk2818 and older SoCs
|
|
*/
|
|
#define ROCKCHIP_RESET_NUM_IN_REG 16
|
|
|
|
struct rockchip_reset_priv {
|
|
void __iomem *base;
|
|
const int *lut;
|
|
/* Rockchip reset reg locate at cru controller */
|
|
u32 reset_reg_offset;
|
|
/* Rockchip reset reg number */
|
|
u32 reset_reg_num;
|
|
};
|
|
|
|
static int rockchip_reset_request(struct reset_ctl *reset_ctl)
|
|
{
|
|
struct rockchip_reset_priv *priv = dev_get_priv(reset_ctl->dev);
|
|
unsigned long id = reset_ctl->id;
|
|
|
|
if (priv->lut)
|
|
id = priv->lut[id];
|
|
|
|
debug("%s(reset_ctl=%p) (dev=%p, id=%lu) (reg_num=%d)\n", __func__,
|
|
reset_ctl, reset_ctl->dev, id, priv->reset_reg_num);
|
|
|
|
if (id / ROCKCHIP_RESET_NUM_IN_REG >= priv->reset_reg_num)
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rockchip_reset_assert(struct reset_ctl *reset_ctl)
|
|
{
|
|
struct rockchip_reset_priv *priv = dev_get_priv(reset_ctl->dev);
|
|
unsigned long id = reset_ctl->id;
|
|
int bank, offset;
|
|
|
|
if (priv->lut)
|
|
id = priv->lut[id];
|
|
|
|
bank = id / ROCKCHIP_RESET_NUM_IN_REG;
|
|
offset = id % ROCKCHIP_RESET_NUM_IN_REG;
|
|
|
|
debug("%s(reset_ctl=%p) (dev=%p, id=%lu) (reg_addr=%p)\n", __func__,
|
|
reset_ctl, reset_ctl->dev, id, priv->base + (bank * 4));
|
|
|
|
rk_setreg(priv->base + (bank * 4), BIT(offset));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rockchip_reset_deassert(struct reset_ctl *reset_ctl)
|
|
{
|
|
struct rockchip_reset_priv *priv = dev_get_priv(reset_ctl->dev);
|
|
unsigned long id = reset_ctl->id;
|
|
int bank, offset;
|
|
|
|
if (priv->lut)
|
|
id = priv->lut[id];
|
|
|
|
bank = id / ROCKCHIP_RESET_NUM_IN_REG;
|
|
offset = id % ROCKCHIP_RESET_NUM_IN_REG;
|
|
|
|
debug("%s(reset_ctl=%p) (dev=%p, id=%lu) (reg_addr=%p)\n", __func__,
|
|
reset_ctl, reset_ctl->dev, id, priv->base + (bank * 4));
|
|
|
|
rk_clrreg(priv->base + (bank * 4), BIT(offset));
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct reset_ops rockchip_reset_ops = {
|
|
.request = rockchip_reset_request,
|
|
.rst_assert = rockchip_reset_assert,
|
|
.rst_deassert = rockchip_reset_deassert,
|
|
};
|
|
|
|
static int rockchip_reset_probe(struct udevice *dev)
|
|
{
|
|
struct rockchip_reset_priv *priv = dev_get_priv(dev);
|
|
fdt_addr_t addr;
|
|
fdt_size_t size;
|
|
|
|
addr = dev_read_addr_size(dev, &size);
|
|
if (addr == FDT_ADDR_T_NONE)
|
|
return -EINVAL;
|
|
|
|
if ((priv->reset_reg_offset == 0) && (priv->reset_reg_num == 0))
|
|
return -EINVAL;
|
|
|
|
addr += priv->reset_reg_offset;
|
|
priv->base = ioremap(addr, size);
|
|
|
|
debug("%s(base=%p) (reg_offset=%x, reg_num=%d)\n", __func__,
|
|
priv->base, priv->reset_reg_offset, priv->reset_reg_num);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int rockchip_reset_bind_lut(struct udevice *pdev,
|
|
const int *lookup_table,
|
|
u32 reg_offset,
|
|
u32 reg_number)
|
|
{
|
|
struct udevice *rst_dev;
|
|
struct rockchip_reset_priv *priv;
|
|
int ret;
|
|
|
|
ret = device_bind_driver_to_node(pdev, "rockchip_reset", "reset",
|
|
dev_ofnode(pdev), &rst_dev);
|
|
if (ret) {
|
|
debug("Warning: No rockchip reset driver: ret=%d\n", ret);
|
|
return ret;
|
|
}
|
|
priv = malloc(sizeof(struct rockchip_reset_priv));
|
|
priv->reset_reg_offset = reg_offset;
|
|
priv->reset_reg_num = reg_number;
|
|
priv->lut = lookup_table;
|
|
dev_set_priv(rst_dev, priv);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int rockchip_reset_bind(struct udevice *pdev, u32 reg_offset, u32 reg_number)
|
|
{
|
|
return rockchip_reset_bind_lut(pdev, NULL, reg_offset, reg_number);
|
|
}
|
|
|
|
U_BOOT_DRIVER(rockchip_reset) = {
|
|
.name = "rockchip_reset",
|
|
.id = UCLASS_RESET,
|
|
.probe = rockchip_reset_probe,
|
|
.ops = &rockchip_reset_ops,
|
|
.priv_auto = sizeof(struct rockchip_reset_priv),
|
|
};
|