336d4615f8
At present dm/device.h includes the linux-compatible features. This requires including linux/compat.h which in turn includes a lot of headers. One of these is malloc.h which we thus end up including in every file in U-Boot. Apart from the inefficiency of this, it is problematic for sandbox which needs to use the system malloc() in some files. Move the compatibility features into a separate header file. Signed-off-by: Simon Glass <sjg@chromium.org>
111 lines
2.4 KiB
C
111 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (C) 2018 Arm Ltd
|
|
* Author: Liviu Dudau <liviu.dudau@foss.arm.com>
|
|
*
|
|
*/
|
|
#define DEBUG
|
|
#include <common.h>
|
|
#include <clk-uclass.h>
|
|
#include <dm.h>
|
|
#include <dm/device_compat.h>
|
|
#include <dm/lists.h>
|
|
#include <errno.h>
|
|
#include <misc.h>
|
|
|
|
#define CLK_FUNCTION BIT(20)
|
|
|
|
struct vexpress_osc_clk_priv {
|
|
u8 osc;
|
|
ulong rate_min;
|
|
ulong rate_max;
|
|
};
|
|
|
|
static ulong vexpress_osc_clk_get_rate(struct clk *clk)
|
|
{
|
|
int err;
|
|
u32 data;
|
|
struct udevice *vexpress_cfg = dev_get_parent(clk->dev);
|
|
struct vexpress_osc_clk_priv *priv = dev_get_priv(clk->dev);
|
|
|
|
data = CLK_FUNCTION | priv->osc;
|
|
err = misc_read(vexpress_cfg, 0, &data, sizeof(data));
|
|
if (err < 0)
|
|
return err;
|
|
|
|
return data;
|
|
}
|
|
|
|
#ifndef CONFIG_SPL_BUILD
|
|
static ulong vexpress_osc_clk_set_rate(struct clk *clk, ulong rate)
|
|
{
|
|
int err;
|
|
u32 buffer[2];
|
|
struct udevice *vexpress_cfg = dev_get_parent(clk->dev);
|
|
struct vexpress_osc_clk_priv *priv = dev_get_priv(clk->dev);
|
|
|
|
if (rate < priv->rate_min || rate > priv->rate_max)
|
|
return -EINVAL;
|
|
|
|
/*
|
|
* we are sending the parent the info about the oscillator
|
|
* and the value we want to set
|
|
*/
|
|
buffer[0] = CLK_FUNCTION | priv->osc;
|
|
buffer[1] = rate;
|
|
err = misc_write(vexpress_cfg, 0, buffer, 2 * sizeof(u32));
|
|
if (err < 0)
|
|
return err;
|
|
|
|
return rate;
|
|
}
|
|
#endif
|
|
|
|
static struct clk_ops vexpress_osc_clk_ops = {
|
|
.get_rate = vexpress_osc_clk_get_rate,
|
|
#ifndef CONFIG_SPL_BUILD
|
|
.set_rate = vexpress_osc_clk_set_rate,
|
|
#endif
|
|
};
|
|
|
|
static int vexpress_osc_clk_probe(struct udevice *dev)
|
|
{
|
|
struct vexpress_osc_clk_priv *priv = dev_get_priv(dev);
|
|
u32 values[2];
|
|
int err;
|
|
|
|
err = dev_read_u32_array(dev, "freq-range", values, 2);
|
|
if (err)
|
|
return err;
|
|
priv->rate_min = values[0];
|
|
priv->rate_max = values[1];
|
|
|
|
err = dev_read_u32_array(dev, "arm,vexpress-sysreg,func", values, 2);
|
|
if (err)
|
|
return err;
|
|
|
|
if (values[0] != 1) {
|
|
dev_err(dev, "Invalid VExpress function for clock, must be '1'");
|
|
return -EINVAL;
|
|
}
|
|
priv->osc = values[1];
|
|
debug("clk \"%s%d\", min freq %luHz, max freq %luHz\n", dev->name,
|
|
priv->osc, priv->rate_min, priv->rate_max);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct udevice_id vexpress_osc_clk_ids[] = {
|
|
{ .compatible = "arm,vexpress-osc", },
|
|
{}
|
|
};
|
|
|
|
U_BOOT_DRIVER(vexpress_osc_clk) = {
|
|
.name = "vexpress_osc_clk",
|
|
.id = UCLASS_CLK,
|
|
.of_match = vexpress_osc_clk_ids,
|
|
.ops = &vexpress_osc_clk_ops,
|
|
.priv_auto_alloc_size = sizeof(struct vexpress_osc_clk_priv),
|
|
.probe = vexpress_osc_clk_probe,
|
|
};
|