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alistair23-linux/drivers/clk/tegra/clk-tegra-super-gen4.c
Thomas Gleixner 9952f6918d treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 201 
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms and conditions of the gnu general public license
  version 2 as published by the free software foundation this program
  is distributed in the hope 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 you should have received a copy of the gnu general
  public license along with this program if not see http www gnu org
  licenses

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 228 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Steve Winslow <swinslow@gmail.com>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190528171438.107155473@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:29:52 -07:00

265 lines
7.3 KiB
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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2012, 2013, NVIDIA CORPORATION. All rights reserved.
*/
#include <linux/io.h>
#include <linux/clk-provider.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/delay.h>
#include <linux/export.h>
#include <linux/clk/tegra.h>
#include "clk.h"
#include "clk-id.h"
#define PLLX_BASE 0xe0
#define PLLX_MISC 0xe4
#define PLLX_MISC2 0x514
#define PLLX_MISC3 0x518
#define CCLKG_BURST_POLICY 0x368
#define CCLKLP_BURST_POLICY 0x370
#define SCLK_BURST_POLICY 0x028
#define SYSTEM_CLK_RATE 0x030
#define SCLK_DIVIDER 0x2c
static DEFINE_SPINLOCK(sysrate_lock);
enum tegra_super_gen {
gen4 = 4,
gen5,
};
struct tegra_super_gen_info {
enum tegra_super_gen gen;
const char **sclk_parents;
const char **cclk_g_parents;
const char **cclk_lp_parents;
int num_sclk_parents;
int num_cclk_g_parents;
int num_cclk_lp_parents;
};
static const char *sclk_parents[] = { "clk_m", "pll_c_out1", "pll_p_out4",
"pll_p", "pll_p_out2", "unused",
"clk_32k", "pll_m_out1" };
static const char *cclk_g_parents[] = { "clk_m", "pll_c", "clk_32k", "pll_m",
"pll_p", "pll_p_out4", "unused",
"unused", "pll_x", "unused", "unused",
"unused", "unused", "unused", "unused",
"dfllCPU_out" };
static const char *cclk_lp_parents[] = { "clk_m", "pll_c", "clk_32k", "pll_m",
"pll_p", "pll_p_out4", "unused",
"unused", "pll_x", "pll_x_out0" };
static const struct tegra_super_gen_info tegra_super_gen_info_gen4 = {
.gen = gen4,
.sclk_parents = sclk_parents,
.cclk_g_parents = cclk_g_parents,
.cclk_lp_parents = cclk_lp_parents,
.num_sclk_parents = ARRAY_SIZE(sclk_parents),
.num_cclk_g_parents = ARRAY_SIZE(cclk_g_parents),
.num_cclk_lp_parents = ARRAY_SIZE(cclk_lp_parents),
};
static const char *sclk_parents_gen5[] = { "clk_m", "pll_c_out1", "pll_c4_out3",
"pll_p", "pll_p_out2", "pll_c4_out1",
"clk_32k", "pll_c4_out2" };
static const char *cclk_g_parents_gen5[] = { "clk_m", "unused", "clk_32k", "unused",
"pll_p", "pll_p_out4", "unused",
"unused", "pll_x", "unused", "unused",
"unused", "unused", "unused", "unused",
"dfllCPU_out" };
static const char *cclk_lp_parents_gen5[] = { "clk_m", "unused", "clk_32k", "unused",
"pll_p", "pll_p_out4", "unused",
"unused", "pll_x", "unused", "unused",
"unused", "unused", "unused", "unused",
"dfllCPU_out" };
static const struct tegra_super_gen_info tegra_super_gen_info_gen5 = {
.gen = gen5,
.sclk_parents = sclk_parents_gen5,
.cclk_g_parents = cclk_g_parents_gen5,
.cclk_lp_parents = cclk_lp_parents_gen5,
.num_sclk_parents = ARRAY_SIZE(sclk_parents_gen5),
.num_cclk_g_parents = ARRAY_SIZE(cclk_g_parents_gen5),
.num_cclk_lp_parents = ARRAY_SIZE(cclk_lp_parents_gen5),
};
static void __init tegra_sclk_init(void __iomem *clk_base,
struct tegra_clk *tegra_clks,
const struct tegra_super_gen_info *gen_info)
{
struct clk *clk;
struct clk **dt_clk;
/* SCLK_MUX */
dt_clk = tegra_lookup_dt_id(tegra_clk_sclk_mux, tegra_clks);
if (dt_clk) {
clk = tegra_clk_register_super_mux("sclk_mux",
gen_info->sclk_parents,
gen_info->num_sclk_parents,
CLK_SET_RATE_PARENT,
clk_base + SCLK_BURST_POLICY,
0, 4, 0, 0, NULL);
*dt_clk = clk;
/* SCLK */
dt_clk = tegra_lookup_dt_id(tegra_clk_sclk, tegra_clks);
if (dt_clk) {
clk = clk_register_divider(NULL, "sclk", "sclk_mux",
CLK_IS_CRITICAL,
clk_base + SCLK_DIVIDER, 0, 8,
0, &sysrate_lock);
*dt_clk = clk;
}
} else {
/* SCLK */
dt_clk = tegra_lookup_dt_id(tegra_clk_sclk, tegra_clks);
if (dt_clk) {
clk = tegra_clk_register_super_mux("sclk",
gen_info->sclk_parents,
gen_info->num_sclk_parents,
CLK_SET_RATE_PARENT |
CLK_IS_CRITICAL,
clk_base + SCLK_BURST_POLICY,
0, 4, 0, 0, NULL);
*dt_clk = clk;
}
}
/* HCLK */
dt_clk = tegra_lookup_dt_id(tegra_clk_hclk, tegra_clks);
if (dt_clk) {
clk = clk_register_divider(NULL, "hclk_div", "sclk", 0,
clk_base + SYSTEM_CLK_RATE, 4, 2, 0,
&sysrate_lock);
clk = clk_register_gate(NULL, "hclk", "hclk_div",
CLK_SET_RATE_PARENT | CLK_IS_CRITICAL,
clk_base + SYSTEM_CLK_RATE,
7, CLK_GATE_SET_TO_DISABLE, &sysrate_lock);
*dt_clk = clk;
}
/* PCLK */
dt_clk = tegra_lookup_dt_id(tegra_clk_pclk, tegra_clks);
if (!dt_clk)
return;
clk = clk_register_divider(NULL, "pclk_div", "hclk", 0,
clk_base + SYSTEM_CLK_RATE, 0, 2, 0,
&sysrate_lock);
clk = clk_register_gate(NULL, "pclk", "pclk_div", CLK_SET_RATE_PARENT |
CLK_IS_CRITICAL, clk_base + SYSTEM_CLK_RATE,
3, CLK_GATE_SET_TO_DISABLE, &sysrate_lock);
*dt_clk = clk;
}
static void __init tegra_super_clk_init(void __iomem *clk_base,
void __iomem *pmc_base,
struct tegra_clk *tegra_clks,
struct tegra_clk_pll_params *params,
const struct tegra_super_gen_info *gen_info)
{
struct clk *clk;
struct clk **dt_clk;
/* CCLKG */
dt_clk = tegra_lookup_dt_id(tegra_clk_cclk_g, tegra_clks);
if (dt_clk) {
if (gen_info->gen == gen5) {
clk = tegra_clk_register_super_mux("cclk_g",
gen_info->cclk_g_parents,
gen_info->num_cclk_g_parents,
CLK_SET_RATE_PARENT,
clk_base + CCLKG_BURST_POLICY,
0, 4, 8, 0, NULL);
} else {
clk = tegra_clk_register_super_mux("cclk_g",
gen_info->cclk_g_parents,
gen_info->num_cclk_g_parents,
CLK_SET_RATE_PARENT,
clk_base + CCLKG_BURST_POLICY,
0, 4, 0, 0, NULL);
}
*dt_clk = clk;
}
/* CCLKLP */
dt_clk = tegra_lookup_dt_id(tegra_clk_cclk_lp, tegra_clks);
if (dt_clk) {
if (gen_info->gen == gen5) {
clk = tegra_clk_register_super_mux("cclk_lp",
gen_info->cclk_lp_parents,
gen_info->num_cclk_lp_parents,
CLK_SET_RATE_PARENT,
clk_base + CCLKLP_BURST_POLICY,
0, 4, 8, 0, NULL);
} else {
clk = tegra_clk_register_super_mux("cclk_lp",
gen_info->cclk_lp_parents,
gen_info->num_cclk_lp_parents,
CLK_SET_RATE_PARENT,
clk_base + CCLKLP_BURST_POLICY,
TEGRA_DIVIDER_2, 4, 8, 9, NULL);
}
*dt_clk = clk;
}
tegra_sclk_init(clk_base, tegra_clks, gen_info);
#if defined(CONFIG_ARCH_TEGRA_114_SOC) || \
defined(CONFIG_ARCH_TEGRA_124_SOC) || \
defined(CONFIG_ARCH_TEGRA_210_SOC)
/* PLLX */
dt_clk = tegra_lookup_dt_id(tegra_clk_pll_x, tegra_clks);
if (!dt_clk)
return;
#if defined(CONFIG_ARCH_TEGRA_210_SOC)
if (gen_info->gen == gen5)
clk = tegra_clk_register_pllc_tegra210("pll_x", "pll_ref",
clk_base, pmc_base, CLK_IGNORE_UNUSED, params, NULL);
else
#endif
clk = tegra_clk_register_pllxc("pll_x", "pll_ref", clk_base,
pmc_base, CLK_IGNORE_UNUSED, params, NULL);
*dt_clk = clk;
/* PLLX_OUT0 */
dt_clk = tegra_lookup_dt_id(tegra_clk_pll_x_out0, tegra_clks);
if (!dt_clk)
return;
clk = clk_register_fixed_factor(NULL, "pll_x_out0", "pll_x",
CLK_SET_RATE_PARENT, 1, 2);
*dt_clk = clk;
#endif
}
void __init tegra_super_clk_gen4_init(void __iomem *clk_base,
void __iomem *pmc_base,
struct tegra_clk *tegra_clks,
struct tegra_clk_pll_params *params)
{
tegra_super_clk_init(clk_base, pmc_base, tegra_clks, params,
&tegra_super_gen_info_gen4);
}
void __init tegra_super_clk_gen5_init(void __iomem *clk_base,
void __iomem *pmc_base,
struct tegra_clk *tegra_clks,
struct tegra_clk_pll_params *params)
{
tegra_super_clk_init(clk_base, pmc_base, tegra_clks, params,
&tegra_super_gen_info_gen5);
}
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