c942fddf87
Based on 3 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version [author] [kishon] [vijay] [abraham] [i] [kishon]@[ti] [com] this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version [author] [graeme] [gregory] [gg]@[slimlogic] [co] [uk] [author] [kishon] [vijay] [abraham] [i] [kishon]@[ti] [com] [based] [on] [twl6030]_[usb] [c] [author] [hema] [hk] [hemahk]@[ti] [com] this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1105 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.202006027@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
89 lines
2.1 KiB
C
89 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Copyright (C) 2016 Socionext Inc.
|
|
* Author: Masahiro Yamada <yamada.masahiro@socionext.com>
|
|
*/
|
|
|
|
#include <linux/clk-provider.h>
|
|
#include <linux/device.h>
|
|
#include <linux/regmap.h>
|
|
|
|
#include "clk-uniphier.h"
|
|
|
|
struct uniphier_clk_gate {
|
|
struct clk_hw hw;
|
|
struct regmap *regmap;
|
|
unsigned int reg;
|
|
unsigned int bit;
|
|
};
|
|
|
|
#define to_uniphier_clk_gate(_hw) \
|
|
container_of(_hw, struct uniphier_clk_gate, hw)
|
|
|
|
static int uniphier_clk_gate_endisable(struct clk_hw *hw, int enable)
|
|
{
|
|
struct uniphier_clk_gate *gate = to_uniphier_clk_gate(hw);
|
|
|
|
return regmap_write_bits(gate->regmap, gate->reg, BIT(gate->bit),
|
|
enable ? BIT(gate->bit) : 0);
|
|
}
|
|
|
|
static int uniphier_clk_gate_enable(struct clk_hw *hw)
|
|
{
|
|
return uniphier_clk_gate_endisable(hw, 1);
|
|
}
|
|
|
|
static void uniphier_clk_gate_disable(struct clk_hw *hw)
|
|
{
|
|
if (uniphier_clk_gate_endisable(hw, 0) < 0)
|
|
pr_warn("failed to disable clk\n");
|
|
}
|
|
|
|
static int uniphier_clk_gate_is_enabled(struct clk_hw *hw)
|
|
{
|
|
struct uniphier_clk_gate *gate = to_uniphier_clk_gate(hw);
|
|
unsigned int val;
|
|
|
|
if (regmap_read(gate->regmap, gate->reg, &val) < 0)
|
|
pr_warn("is_enabled() may return wrong result\n");
|
|
|
|
return !!(val & BIT(gate->bit));
|
|
}
|
|
|
|
static const struct clk_ops uniphier_clk_gate_ops = {
|
|
.enable = uniphier_clk_gate_enable,
|
|
.disable = uniphier_clk_gate_disable,
|
|
.is_enabled = uniphier_clk_gate_is_enabled,
|
|
};
|
|
|
|
struct clk_hw *uniphier_clk_register_gate(struct device *dev,
|
|
struct regmap *regmap,
|
|
const char *name,
|
|
const struct uniphier_clk_gate_data *data)
|
|
{
|
|
struct uniphier_clk_gate *gate;
|
|
struct clk_init_data init;
|
|
int ret;
|
|
|
|
gate = devm_kzalloc(dev, sizeof(*gate), GFP_KERNEL);
|
|
if (!gate)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
init.name = name;
|
|
init.ops = &uniphier_clk_gate_ops;
|
|
init.flags = data->parent_name ? CLK_SET_RATE_PARENT : 0;
|
|
init.parent_names = data->parent_name ? &data->parent_name : NULL;
|
|
init.num_parents = data->parent_name ? 1 : 0;
|
|
|
|
gate->regmap = regmap;
|
|
gate->reg = data->reg;
|
|
gate->bit = data->bit;
|
|
gate->hw.init = &init;
|
|
|
|
ret = devm_clk_hw_register(dev, &gate->hw);
|
|
if (ret)
|
|
return ERR_PTR(ret);
|
|
|
|
return &gate->hw;
|
|
}
|