u-boot/drivers/clk/clk_boston.c
Masahiro Yamada 9b643e312d treewide: replace with error() with pr_err()
U-Boot widely uses error() as a bit noisier variant of printf().

This macro causes name conflict with the following line in
include/linux/compiler-gcc.h:

  # define __compiletime_error(message) __attribute__((error(message)))

This prevents us from using __compiletime_error(), and makes it
difficult to fully sync BUILD_BUG macros with Linux.  (Notice
Linux's BUILD_BUG_ON_MSG is implemented by using compiletime_assert().)

Let's convert error() into now treewide-available pr_err().

Done with the help of Coccinelle, excluing tools/ directory.

The semantic patch I used is as follows:

// <smpl>
@@@@
-error
+pr_err
 (...)
// </smpl>

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
[trini: Re-run Coccinelle]
Signed-off-by: Tom Rini <trini@konsulko.com>
2017-10-04 11:59:44 -04:00

97 lines
2.1 KiB
C

/*
* Copyright (C) 2016 Imagination Technologies
*
* SPDX-License-Identifier: GPL-2.0
*/
#include <common.h>
#include <clk-uclass.h>
#include <dm.h>
#include <dt-bindings/clock/boston-clock.h>
#include <regmap.h>
#include <syscon.h>
struct clk_boston {
struct regmap *regmap;
};
#define BOSTON_PLAT_MMCMDIV 0x30
# define BOSTON_PLAT_MMCMDIV_CLK0DIV (0xff << 0)
# define BOSTON_PLAT_MMCMDIV_INPUT (0xff << 8)
# define BOSTON_PLAT_MMCMDIV_MUL (0xff << 16)
# define BOSTON_PLAT_MMCMDIV_CLK1DIV (0xff << 24)
static uint32_t ext_field(uint32_t val, uint32_t mask)
{
return (val & mask) >> (ffs(mask) - 1);
}
static ulong clk_boston_get_rate(struct clk *clk)
{
struct clk_boston *state = dev_get_platdata(clk->dev);
uint32_t in_rate, mul, div;
uint mmcmdiv;
int err;
err = regmap_read(state->regmap, BOSTON_PLAT_MMCMDIV, &mmcmdiv);
if (err)
return 0;
in_rate = ext_field(mmcmdiv, BOSTON_PLAT_MMCMDIV_INPUT);
mul = ext_field(mmcmdiv, BOSTON_PLAT_MMCMDIV_MUL);
switch (clk->id) {
case BOSTON_CLK_SYS:
div = ext_field(mmcmdiv, BOSTON_PLAT_MMCMDIV_CLK0DIV);
break;
case BOSTON_CLK_CPU:
div = ext_field(mmcmdiv, BOSTON_PLAT_MMCMDIV_CLK1DIV);
break;
default:
return 0;
}
return (in_rate * mul * 1000000) / div;
}
const struct clk_ops clk_boston_ops = {
.get_rate = clk_boston_get_rate,
};
static int clk_boston_ofdata_to_platdata(struct udevice *dev)
{
struct clk_boston *state = dev_get_platdata(dev);
struct udevice *syscon;
int err;
err = uclass_get_device_by_phandle(UCLASS_SYSCON, dev,
"regmap", &syscon);
if (err) {
pr_err("unable to find syscon device\n");
return err;
}
state->regmap = syscon_get_regmap(syscon);
if (!state->regmap) {
pr_err("unable to find regmap\n");
return -ENODEV;
}
return 0;
}
static const struct udevice_id clk_boston_match[] = {
{
.compatible = "img,boston-clock",
},
{ /* sentinel */ }
};
U_BOOT_DRIVER(clk_boston) = {
.name = "boston_clock",
.id = UCLASS_CLK,
.of_match = clk_boston_match,
.ofdata_to_platdata = clk_boston_ofdata_to_platdata,
.platdata_auto_alloc_size = sizeof(struct clk_boston),
.ops = &clk_boston_ops,
};