https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: 64570fbc14f8d7cb3fe3995f20e26bc25ce4b2cc authored by Linus Torvalds on 11 October 2021, 00:01:59 UTC
Linux 5.15-rc5
Linux 5.15-rc5
Tip revision: 64570fb
owl-gate.c
// SPDX-License-Identifier: GPL-2.0+
//
// OWL gate clock driver
//
// Copyright (c) 2014 Actions Semi Inc.
// Author: David Liu <liuwei@actions-semi.com>
//
// Copyright (c) 2018 Linaro Ltd.
// Author: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
#include <linux/clk-provider.h>
#include <linux/regmap.h>
#include "owl-gate.h"
void owl_gate_set(const struct owl_clk_common *common,
const struct owl_gate_hw *gate_hw, bool enable)
{
int set = gate_hw->gate_flags & CLK_GATE_SET_TO_DISABLE ? 1 : 0;
u32 reg;
set ^= enable;
regmap_read(common->regmap, gate_hw->reg, ®);
if (set)
reg |= BIT(gate_hw->bit_idx);
else
reg &= ~BIT(gate_hw->bit_idx);
regmap_write(common->regmap, gate_hw->reg, reg);
}
static void owl_gate_disable(struct clk_hw *hw)
{
struct owl_gate *gate = hw_to_owl_gate(hw);
struct owl_clk_common *common = &gate->common;
owl_gate_set(common, &gate->gate_hw, false);
}
static int owl_gate_enable(struct clk_hw *hw)
{
struct owl_gate *gate = hw_to_owl_gate(hw);
struct owl_clk_common *common = &gate->common;
owl_gate_set(common, &gate->gate_hw, true);
return 0;
}
int owl_gate_clk_is_enabled(const struct owl_clk_common *common,
const struct owl_gate_hw *gate_hw)
{
u32 reg;
regmap_read(common->regmap, gate_hw->reg, ®);
if (gate_hw->gate_flags & CLK_GATE_SET_TO_DISABLE)
reg ^= BIT(gate_hw->bit_idx);
return !!(reg & BIT(gate_hw->bit_idx));
}
static int owl_gate_is_enabled(struct clk_hw *hw)
{
struct owl_gate *gate = hw_to_owl_gate(hw);
struct owl_clk_common *common = &gate->common;
return owl_gate_clk_is_enabled(common, &gate->gate_hw);
}
const struct clk_ops owl_gate_ops = {
.disable = owl_gate_disable,
.enable = owl_gate_enable,
.is_enabled = owl_gate_is_enabled,
};