mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-27 03:05:21 +07:00
70c0d36462
Use direct function call instead of eemi ops for clock set/get parent. Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com> Signed-off-by: Jolly Shah <jolly.shah@xilinx.com> Link: https://lore.kernel.org/r/1587761887-4279-11-git-send-email-jolly.shah@xilinx.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
139 lines
3.3 KiB
C
139 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Zynq UltraScale+ MPSoC mux
|
|
*
|
|
* Copyright (C) 2016-2018 Xilinx
|
|
*/
|
|
|
|
#include <linux/clk-provider.h>
|
|
#include <linux/slab.h>
|
|
#include "clk-zynqmp.h"
|
|
|
|
/*
|
|
* DOC: basic adjustable multiplexer clock that cannot gate
|
|
*
|
|
* Traits of this clock:
|
|
* prepare - clk_prepare only ensures that parents are prepared
|
|
* enable - clk_enable only ensures that parents are enabled
|
|
* rate - rate is only affected by parent switching. No clk_set_rate support
|
|
* parent - parent is adjustable through clk_set_parent
|
|
*/
|
|
|
|
/**
|
|
* struct zynqmp_clk_mux - multiplexer clock
|
|
*
|
|
* @hw: handle between common and hardware-specific interfaces
|
|
* @flags: hardware-specific flags
|
|
* @clk_id: Id of clock
|
|
*/
|
|
struct zynqmp_clk_mux {
|
|
struct clk_hw hw;
|
|
u8 flags;
|
|
u32 clk_id;
|
|
};
|
|
|
|
#define to_zynqmp_clk_mux(_hw) container_of(_hw, struct zynqmp_clk_mux, hw)
|
|
|
|
/**
|
|
* zynqmp_clk_mux_get_parent() - Get parent of clock
|
|
* @hw: handle between common and hardware-specific interfaces
|
|
*
|
|
* Return: Parent index
|
|
*/
|
|
static u8 zynqmp_clk_mux_get_parent(struct clk_hw *hw)
|
|
{
|
|
struct zynqmp_clk_mux *mux = to_zynqmp_clk_mux(hw);
|
|
const char *clk_name = clk_hw_get_name(hw);
|
|
u32 clk_id = mux->clk_id;
|
|
u32 val;
|
|
int ret;
|
|
|
|
ret = zynqmp_pm_clock_getparent(clk_id, &val);
|
|
|
|
if (ret)
|
|
pr_warn_once("%s() getparent failed for clock: %s, ret = %d\n",
|
|
__func__, clk_name, ret);
|
|
|
|
return val;
|
|
}
|
|
|
|
/**
|
|
* zynqmp_clk_mux_set_parent() - Set parent of clock
|
|
* @hw: handle between common and hardware-specific interfaces
|
|
* @index: Parent index
|
|
*
|
|
* Return: 0 on success else error+reason
|
|
*/
|
|
static int zynqmp_clk_mux_set_parent(struct clk_hw *hw, u8 index)
|
|
{
|
|
struct zynqmp_clk_mux *mux = to_zynqmp_clk_mux(hw);
|
|
const char *clk_name = clk_hw_get_name(hw);
|
|
u32 clk_id = mux->clk_id;
|
|
int ret;
|
|
|
|
ret = zynqmp_pm_clock_setparent(clk_id, index);
|
|
|
|
if (ret)
|
|
pr_warn_once("%s() set parent failed for clock: %s, ret = %d\n",
|
|
__func__, clk_name, ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct clk_ops zynqmp_clk_mux_ops = {
|
|
.get_parent = zynqmp_clk_mux_get_parent,
|
|
.set_parent = zynqmp_clk_mux_set_parent,
|
|
.determine_rate = __clk_mux_determine_rate,
|
|
};
|
|
|
|
static const struct clk_ops zynqmp_clk_mux_ro_ops = {
|
|
.get_parent = zynqmp_clk_mux_get_parent,
|
|
};
|
|
|
|
/**
|
|
* zynqmp_clk_register_mux() - Register a mux table with the clock
|
|
* framework
|
|
* @name: Name of this clock
|
|
* @clk_id: Id of this clock
|
|
* @parents: Name of this clock's parents
|
|
* @num_parents: Number of parents
|
|
* @nodes: Clock topology node
|
|
*
|
|
* Return: clock hardware of the registered clock mux
|
|
*/
|
|
struct clk_hw *zynqmp_clk_register_mux(const char *name, u32 clk_id,
|
|
const char * const *parents,
|
|
u8 num_parents,
|
|
const struct clock_topology *nodes)
|
|
{
|
|
struct zynqmp_clk_mux *mux;
|
|
struct clk_hw *hw;
|
|
struct clk_init_data init;
|
|
int ret;
|
|
|
|
mux = kzalloc(sizeof(*mux), GFP_KERNEL);
|
|
if (!mux)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
init.name = name;
|
|
if (nodes->type_flag & CLK_MUX_READ_ONLY)
|
|
init.ops = &zynqmp_clk_mux_ro_ops;
|
|
else
|
|
init.ops = &zynqmp_clk_mux_ops;
|
|
init.flags = nodes->flag;
|
|
init.parent_names = parents;
|
|
init.num_parents = num_parents;
|
|
mux->flags = nodes->type_flag;
|
|
mux->hw.init = &init;
|
|
mux->clk_id = clk_id;
|
|
|
|
hw = &mux->hw;
|
|
ret = clk_hw_register(NULL, hw);
|
|
if (ret) {
|
|
kfree(hw);
|
|
hw = ERR_PTR(ret);
|
|
}
|
|
|
|
return hw;
|
|
}
|