mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-20 08:58:52 +09:00
![Dario Binacchi](/assets/img/avatar_default.png)
The module defines a duplicate uclass driver for UCLASS_SIMPLE_BUS, but it is not allowed. This breaks of-platdata and makes the result non-deterministic. The driver does not need to be an uclass driver, so lets remove it. I had turned it into an uclass driver because I thought wrongly it had to call the dm_scan_fdt_dev routine to work properly, but some tests on the board have shown otherwise. Signed-off-by: Dario Binacchi <dariobin@libero.it> Reviewed-by: Simon Glass <sjg@chromium.org>
161 lines
3.1 KiB
C
161 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Texas Instruments sysc interconnect target driver
|
|
*
|
|
* Copyright (C) 2020 Dario Binacchi <dariobin@libero.it>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <clk.h>
|
|
#include <dm.h>
|
|
#include <dm/device_compat.h>
|
|
|
|
enum ti_sysc_clocks {
|
|
TI_SYSC_FCK,
|
|
TI_SYSC_ICK,
|
|
TI_SYSC_MAX_CLOCKS,
|
|
};
|
|
|
|
static const char *const clock_names[] = {"fck", "ick"};
|
|
|
|
struct ti_sysc_priv {
|
|
int clocks_count;
|
|
struct clk clocks[TI_SYSC_MAX_CLOCKS];
|
|
};
|
|
|
|
static const struct udevice_id ti_sysc_ids[] = {
|
|
{.compatible = "ti,sysc-omap2"},
|
|
{.compatible = "ti,sysc-omap4"},
|
|
{.compatible = "ti,sysc-omap4-simple"},
|
|
{.compatible = "ti,sysc-omap3430-sr"},
|
|
{.compatible = "ti,sysc-omap3630-sr"},
|
|
{.compatible = "ti,sysc-omap4-sr"},
|
|
{.compatible = "ti,sysc-omap3-sham"},
|
|
{.compatible = "ti,sysc-omap-aes"},
|
|
{.compatible = "ti,sysc-mcasp"},
|
|
{.compatible = "ti,sysc-usb-host-fs"},
|
|
{}
|
|
};
|
|
|
|
static int ti_sysc_get_one_clock(struct udevice *dev, enum ti_sysc_clocks index)
|
|
{
|
|
struct ti_sysc_priv *priv = dev_get_priv(dev);
|
|
const char *name;
|
|
int err;
|
|
|
|
switch (index) {
|
|
case TI_SYSC_FCK:
|
|
break;
|
|
case TI_SYSC_ICK:
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
name = clock_names[index];
|
|
|
|
err = clk_get_by_name(dev, name, &priv->clocks[index]);
|
|
if (err) {
|
|
if (err == -ENODATA)
|
|
return 0;
|
|
|
|
dev_err(dev, "failed to get %s clock\n", name);
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ti_sysc_put_clocks(struct udevice *dev)
|
|
{
|
|
struct ti_sysc_priv *priv = dev_get_priv(dev);
|
|
int err;
|
|
|
|
err = clk_release_all(priv->clocks, priv->clocks_count);
|
|
if (err)
|
|
dev_err(dev, "failed to release all clocks\n");
|
|
|
|
return err;
|
|
}
|
|
|
|
static int ti_sysc_get_clocks(struct udevice *dev)
|
|
{
|
|
struct ti_sysc_priv *priv = dev_get_priv(dev);
|
|
int i, err;
|
|
|
|
for (i = 0; i < TI_SYSC_MAX_CLOCKS; i++) {
|
|
err = ti_sysc_get_one_clock(dev, i);
|
|
if (!err)
|
|
priv->clocks_count++;
|
|
else if (err != -ENOENT)
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ti_sysc_child_post_remove(struct udevice *dev)
|
|
{
|
|
struct ti_sysc_priv *priv = dev_get_priv(dev->parent);
|
|
int i, err;
|
|
|
|
for (i = 0; i < priv->clocks_count; i++) {
|
|
err = clk_disable(&priv->clocks[i]);
|
|
if (err) {
|
|
dev_err(dev->parent, "failed to disable %s clock\n",
|
|
clock_names[i]);
|
|
return err;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ti_sysc_child_pre_probe(struct udevice *dev)
|
|
{
|
|
struct ti_sysc_priv *priv = dev_get_priv(dev->parent);
|
|
int i, err;
|
|
|
|
for (i = 0; i < priv->clocks_count; i++) {
|
|
err = clk_enable(&priv->clocks[i]);
|
|
if (err) {
|
|
dev_err(dev->parent, "failed to enable %s clock\n",
|
|
clock_names[i]);
|
|
return err;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ti_sysc_remove(struct udevice *dev)
|
|
{
|
|
return ti_sysc_put_clocks(dev);
|
|
}
|
|
|
|
static int ti_sysc_probe(struct udevice *dev)
|
|
{
|
|
int err;
|
|
|
|
err = ti_sysc_get_clocks(dev);
|
|
if (err)
|
|
goto clocks_err;
|
|
|
|
return 0;
|
|
|
|
clocks_err:
|
|
ti_sysc_put_clocks(dev);
|
|
return err;
|
|
}
|
|
|
|
U_BOOT_DRIVER(ti_sysc) = {
|
|
.name = "ti_sysc",
|
|
.id = UCLASS_SIMPLE_BUS,
|
|
.of_match = ti_sysc_ids,
|
|
.probe = ti_sysc_probe,
|
|
.remove = ti_sysc_remove,
|
|
.child_pre_probe = ti_sysc_child_pre_probe,
|
|
.child_post_remove = ti_sysc_child_post_remove,
|
|
.priv_auto = sizeof(struct ti_sysc_priv)
|
|
};
|