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/*
* Hi3519 Clock Driver
*
* Copyright (c) 2015-2016 HiSilicon Technologies Co., Ltd.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <dt-bindings/clock/hi3519-clock.h>
#include <linux/clk-provider.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include "clk.h"
#include "reset.h"
#define HI3519_INNER_CLK_OFFSET 64
#define HI3519_FIXED_24M 65
#define HI3519_FIXED_50M 66
#define HI3519_FIXED_75M 67
#define HI3519_FIXED_125M 68
#define HI3519_FIXED_150M 69
#define HI3519_FIXED_200M 70
#define HI3519_FIXED_250M 71
#define HI3519_FIXED_300M 72
#define HI3519_FIXED_400M 73
#define HI3519_FMC_MUX 74
#define HI3519_NR_CLKS 128
struct hi3519_crg_data {
struct hisi_clock_data *clk_data;
struct hisi_reset_controller *rstc;
};
static const struct hisi_fixed_rate_clock hi3519_fixed_rate_clks[] = {
{ HI3519_FIXED_24M, "24m", NULL, 0, 24000000, },
{ HI3519_FIXED_50M, "50m", NULL, 0, 50000000, },
{ HI3519_FIXED_75M, "75m", NULL, 0, 75000000, },
{ HI3519_FIXED_125M, "125m", NULL, 0, 125000000, },
{ HI3519_FIXED_150M, "150m", NULL, 0, 150000000, },
{ HI3519_FIXED_200M, "200m", NULL, 0, 200000000, },
{ HI3519_FIXED_250M, "250m", NULL, 0, 250000000, },
{ HI3519_FIXED_300M, "300m", NULL, 0, 300000000, },
{ HI3519_FIXED_400M, "400m", NULL, 0, 400000000, },
};
static const char *const fmc_mux_p[] = {
"24m", "75m", "125m", "150m", "200m", "250m", "300m", "400m", };
static u32 fmc_mux_table[] = {0, 1, 2, 3, 4, 5, 6, 7};
static const struct hisi_mux_clock hi3519_mux_clks[] = {
{ HI3519_FMC_MUX, "fmc_mux", fmc_mux_p, ARRAY_SIZE(fmc_mux_p),
CLK_SET_RATE_PARENT, 0xc0, 2, 3, 0, fmc_mux_table, },
};
static const struct hisi_gate_clock hi3519_gate_clks[] = {
{ HI3519_FMC_CLK, "clk_fmc", "fmc_mux",
CLK_SET_RATE_PARENT, 0xc0, 1, 0, },
{ HI3519_UART0_CLK, "clk_uart0", "24m",
CLK_SET_RATE_PARENT, 0xe4, 20, 0, },
{ HI3519_UART1_CLK, "clk_uart1", "24m",
CLK_SET_RATE_PARENT, 0xe4, 21, 0, },
{ HI3519_UART2_CLK, "clk_uart2", "24m",
CLK_SET_RATE_PARENT, 0xe4, 22, 0, },
{ HI3519_UART3_CLK, "clk_uart3", "24m",
CLK_SET_RATE_PARENT, 0xe4, 23, 0, },
{ HI3519_UART4_CLK, "clk_uart4", "24m",
CLK_SET_RATE_PARENT, 0xe4, 24, 0, },
{ HI3519_SPI0_CLK, "clk_spi0", "50m",
CLK_SET_RATE_PARENT, 0xe4, 16, 0, },
{ HI3519_SPI1_CLK, "clk_spi1", "50m",
CLK_SET_RATE_PARENT, 0xe4, 17, 0, },
{ HI3519_SPI2_CLK, "clk_spi2", "50m",
CLK_SET_RATE_PARENT, 0xe4, 18, 0, },
};
static struct hisi_clock_data *hi3519_clk_register(struct platform_device *pdev)
{
struct hisi_clock_data *clk_data;
int ret;
clk_data = hisi_clk_alloc(pdev, HI3519_NR_CLKS);
if (!clk_data)
return ERR_PTR(-ENOMEM);
ret = hisi_clk_register_fixed_rate(hi3519_fixed_rate_clks,
ARRAY_SIZE(hi3519_fixed_rate_clks),
clk_data);
if (ret)
return ERR_PTR(ret);
ret = hisi_clk_register_mux(hi3519_mux_clks,
ARRAY_SIZE(hi3519_mux_clks),
clk_data);
if (ret)
goto unregister_fixed_rate;
ret = hisi_clk_register_gate(hi3519_gate_clks,
ARRAY_SIZE(hi3519_gate_clks),
clk_data);
if (ret)
goto unregister_mux;
ret = of_clk_add_provider(pdev->dev.of_node,
of_clk_src_onecell_get, &clk_data->clk_data);
if (ret)
goto unregister_gate;
return clk_data;
unregister_fixed_rate:
hisi_clk_unregister_fixed_rate(hi3519_fixed_rate_clks,
ARRAY_SIZE(hi3519_fixed_rate_clks),
clk_data);
unregister_mux:
hisi_clk_unregister_mux(hi3519_mux_clks,
ARRAY_SIZE(hi3519_mux_clks),
clk_data);
unregister_gate:
hisi_clk_unregister_gate(hi3519_gate_clks,
ARRAY_SIZE(hi3519_gate_clks),
clk_data);
return ERR_PTR(ret);
}
static void hi3519_clk_unregister(struct platform_device *pdev)
{
struct hi3519_crg_data *crg = platform_get_drvdata(pdev);
of_clk_del_provider(pdev->dev.of_node);
hisi_clk_unregister_gate(hi3519_gate_clks,
ARRAY_SIZE(hi3519_mux_clks),
crg->clk_data);
hisi_clk_unregister_mux(hi3519_mux_clks,
ARRAY_SIZE(hi3519_mux_clks),
crg->clk_data);
hisi_clk_unregister_fixed_rate(hi3519_fixed_rate_clks,
ARRAY_SIZE(hi3519_fixed_rate_clks),
crg->clk_data);
}
static int hi3519_clk_probe(struct platform_device *pdev)
{
struct hi3519_crg_data *crg;
crg = devm_kmalloc(&pdev->dev, sizeof(*crg), GFP_KERNEL);
if (!crg)
return -ENOMEM;
crg->rstc = hisi_reset_init(pdev);
if (!crg->rstc)
return -ENOMEM;
crg->clk_data = hi3519_clk_register(pdev);
if (IS_ERR(crg->clk_data)) {
hisi_reset_exit(crg->rstc);
return PTR_ERR(crg->clk_data);
}
platform_set_drvdata(pdev, crg);
return 0;
}
static int hi3519_clk_remove(struct platform_device *pdev)
{
struct hi3519_crg_data *crg = platform_get_drvdata(pdev);
hisi_reset_exit(crg->rstc);
hi3519_clk_unregister(pdev);
return 0;
}
static const struct of_device_id hi3519_clk_match_table[] = {
{ .compatible = "hisilicon,hi3519-crg" },
{ }
};
MODULE_DEVICE_TABLE(of, hi3519_clk_match_table);
static struct platform_driver hi3519_clk_driver = {
.probe = hi3519_clk_probe,
.remove = hi3519_clk_remove,
.driver = {
.name = "hi3519-clk",
.of_match_table = hi3519_clk_match_table,
},
};
static int __init hi3519_clk_init(void)
{
return platform_driver_register(&hi3519_clk_driver);
}
core_initcall(hi3519_clk_init);
static void __exit hi3519_clk_exit(void)
{
platform_driver_unregister(&hi3519_clk_driver);
}
module_exit(hi3519_clk_exit);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("HiSilicon Hi3519 Clock Driver");
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