mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-12 21:57:43 +00:00
551b62b1e4
For the individual CCU drivers to be built as modules, the ops structs, helper functions, and callback registration functions must be exported. These symbols are intended for use only by the adjacent CCU drivers, so export them into the SUNXI_CCU namespace. of_sunxi_ccu_probe is not exported because it is only used by built-in OF clock providers. Signed-off-by: Samuel Holland <samuel@sholland.org> Signed-off-by: Maxime Ripard <maxime@cerno.tech> Link: https://lore.kernel.org/r/20211119033338.25486-2-samuel@sholland.org
144 lines
3.4 KiB
C
144 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Copyright (C) 2016 Maxime Ripard
|
|
* Maxime Ripard <maxime.ripard@free-electrons.com>
|
|
*/
|
|
|
|
#include <linux/clk-provider.h>
|
|
#include <linux/io.h>
|
|
|
|
#include "ccu_gate.h"
|
|
#include "ccu_div.h"
|
|
|
|
static unsigned long ccu_div_round_rate(struct ccu_mux_internal *mux,
|
|
struct clk_hw *parent,
|
|
unsigned long *parent_rate,
|
|
unsigned long rate,
|
|
void *data)
|
|
{
|
|
struct ccu_div *cd = data;
|
|
|
|
if (cd->common.features & CCU_FEATURE_FIXED_POSTDIV)
|
|
rate *= cd->fixed_post_div;
|
|
|
|
rate = divider_round_rate_parent(&cd->common.hw, parent,
|
|
rate, parent_rate,
|
|
cd->div.table, cd->div.width,
|
|
cd->div.flags);
|
|
|
|
if (cd->common.features & CCU_FEATURE_FIXED_POSTDIV)
|
|
rate /= cd->fixed_post_div;
|
|
|
|
return rate;
|
|
}
|
|
|
|
static void ccu_div_disable(struct clk_hw *hw)
|
|
{
|
|
struct ccu_div *cd = hw_to_ccu_div(hw);
|
|
|
|
return ccu_gate_helper_disable(&cd->common, cd->enable);
|
|
}
|
|
|
|
static int ccu_div_enable(struct clk_hw *hw)
|
|
{
|
|
struct ccu_div *cd = hw_to_ccu_div(hw);
|
|
|
|
return ccu_gate_helper_enable(&cd->common, cd->enable);
|
|
}
|
|
|
|
static int ccu_div_is_enabled(struct clk_hw *hw)
|
|
{
|
|
struct ccu_div *cd = hw_to_ccu_div(hw);
|
|
|
|
return ccu_gate_helper_is_enabled(&cd->common, cd->enable);
|
|
}
|
|
|
|
static unsigned long ccu_div_recalc_rate(struct clk_hw *hw,
|
|
unsigned long parent_rate)
|
|
{
|
|
struct ccu_div *cd = hw_to_ccu_div(hw);
|
|
unsigned long val;
|
|
u32 reg;
|
|
|
|
reg = readl(cd->common.base + cd->common.reg);
|
|
val = reg >> cd->div.shift;
|
|
val &= (1 << cd->div.width) - 1;
|
|
|
|
parent_rate = ccu_mux_helper_apply_prediv(&cd->common, &cd->mux, -1,
|
|
parent_rate);
|
|
|
|
val = divider_recalc_rate(hw, parent_rate, val, cd->div.table,
|
|
cd->div.flags, cd->div.width);
|
|
|
|
if (cd->common.features & CCU_FEATURE_FIXED_POSTDIV)
|
|
val /= cd->fixed_post_div;
|
|
|
|
return val;
|
|
}
|
|
|
|
static int ccu_div_determine_rate(struct clk_hw *hw,
|
|
struct clk_rate_request *req)
|
|
{
|
|
struct ccu_div *cd = hw_to_ccu_div(hw);
|
|
|
|
return ccu_mux_helper_determine_rate(&cd->common, &cd->mux,
|
|
req, ccu_div_round_rate, cd);
|
|
}
|
|
|
|
static int ccu_div_set_rate(struct clk_hw *hw, unsigned long rate,
|
|
unsigned long parent_rate)
|
|
{
|
|
struct ccu_div *cd = hw_to_ccu_div(hw);
|
|
unsigned long flags;
|
|
unsigned long val;
|
|
u32 reg;
|
|
|
|
parent_rate = ccu_mux_helper_apply_prediv(&cd->common, &cd->mux, -1,
|
|
parent_rate);
|
|
|
|
if (cd->common.features & CCU_FEATURE_FIXED_POSTDIV)
|
|
rate *= cd->fixed_post_div;
|
|
|
|
val = divider_get_val(rate, parent_rate, cd->div.table, cd->div.width,
|
|
cd->div.flags);
|
|
|
|
spin_lock_irqsave(cd->common.lock, flags);
|
|
|
|
reg = readl(cd->common.base + cd->common.reg);
|
|
reg &= ~GENMASK(cd->div.width + cd->div.shift - 1, cd->div.shift);
|
|
|
|
writel(reg | (val << cd->div.shift),
|
|
cd->common.base + cd->common.reg);
|
|
|
|
spin_unlock_irqrestore(cd->common.lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static u8 ccu_div_get_parent(struct clk_hw *hw)
|
|
{
|
|
struct ccu_div *cd = hw_to_ccu_div(hw);
|
|
|
|
return ccu_mux_helper_get_parent(&cd->common, &cd->mux);
|
|
}
|
|
|
|
static int ccu_div_set_parent(struct clk_hw *hw, u8 index)
|
|
{
|
|
struct ccu_div *cd = hw_to_ccu_div(hw);
|
|
|
|
return ccu_mux_helper_set_parent(&cd->common, &cd->mux, index);
|
|
}
|
|
|
|
const struct clk_ops ccu_div_ops = {
|
|
.disable = ccu_div_disable,
|
|
.enable = ccu_div_enable,
|
|
.is_enabled = ccu_div_is_enabled,
|
|
|
|
.get_parent = ccu_div_get_parent,
|
|
.set_parent = ccu_div_set_parent,
|
|
|
|
.determine_rate = ccu_div_determine_rate,
|
|
.recalc_rate = ccu_div_recalc_rate,
|
|
.set_rate = ccu_div_set_rate,
|
|
};
|
|
EXPORT_SYMBOL_NS_GPL(ccu_div_ops, SUNXI_CCU);
|