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/*
* Copyright (c) 2017 Icenowy Zheng <icenowy@aosc.io>
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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.
*/
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/reset.h>
#include "ccu_common.h"
#include "ccu_div.h"
#include "ccu_gate.h"
#include "ccu_reset.h"
#include "ccu-sun8i-de2.h"
static SUNXI_CCU_GATE(bus_mixer0_clk, "bus-mixer0", "bus-de",
0x04, BIT(0), 0);
static SUNXI_CCU_GATE(bus_mixer1_clk, "bus-mixer1", "bus-de",
0x04, BIT(1), 0);
static SUNXI_CCU_GATE(bus_wb_clk, "bus-wb", "bus-de",
0x04, BIT(2), 0);
static SUNXI_CCU_GATE(mixer0_clk, "mixer0", "mixer0-div",
0x00, BIT(0), CLK_SET_RATE_PARENT);
static SUNXI_CCU_GATE(mixer1_clk, "mixer1", "mixer1-div",
0x00, BIT(1), CLK_SET_RATE_PARENT);
static SUNXI_CCU_GATE(wb_clk, "wb", "wb-div",
0x00, BIT(2), CLK_SET_RATE_PARENT);
static SUNXI_CCU_M(mixer0_div_clk, "mixer0-div", "de", 0x0c, 0, 4,
CLK_SET_RATE_PARENT);
static SUNXI_CCU_M(mixer1_div_clk, "mixer1-div", "de", 0x0c, 4, 4,
CLK_SET_RATE_PARENT);
static SUNXI_CCU_M(wb_div_clk, "wb-div", "de", 0x0c, 8, 4,
CLK_SET_RATE_PARENT);
static struct ccu_common *sun8i_a83t_de2_clks[] = {
&mixer0_clk.common,
&mixer1_clk.common,
&wb_clk.common,
&bus_mixer0_clk.common,
&bus_mixer1_clk.common,
&bus_wb_clk.common,
&mixer0_div_clk.common,
&mixer1_div_clk.common,
&wb_div_clk.common,
};
static struct ccu_common *sun8i_v3s_de2_clks[] = {
&mixer0_clk.common,
&wb_clk.common,
&bus_mixer0_clk.common,
&bus_wb_clk.common,
&mixer0_div_clk.common,
&wb_div_clk.common,
};
static struct clk_hw_onecell_data sun8i_a83t_de2_hw_clks = {
.hws = {
[CLK_MIXER0] = &mixer0_clk.common.hw,
[CLK_MIXER1] = &mixer1_clk.common.hw,
[CLK_WB] = &wb_clk.common.hw,
[CLK_BUS_MIXER0] = &bus_mixer0_clk.common.hw,
[CLK_BUS_MIXER1] = &bus_mixer1_clk.common.hw,
[CLK_BUS_WB] = &bus_wb_clk.common.hw,
[CLK_MIXER0_DIV] = &mixer0_div_clk.common.hw,
[CLK_MIXER1_DIV] = &mixer1_div_clk.common.hw,
[CLK_WB_DIV] = &wb_div_clk.common.hw,
},
.num = CLK_NUMBER,
};
static struct clk_hw_onecell_data sun8i_v3s_de2_hw_clks = {
.hws = {
[CLK_MIXER0] = &mixer0_clk.common.hw,
[CLK_WB] = &wb_clk.common.hw,
[CLK_BUS_MIXER0] = &bus_mixer0_clk.common.hw,
[CLK_BUS_WB] = &bus_wb_clk.common.hw,
[CLK_MIXER0_DIV] = &mixer0_div_clk.common.hw,
[CLK_WB_DIV] = &wb_div_clk.common.hw,
},
.num = CLK_NUMBER,
};
static struct ccu_reset_map sun8i_a83t_de2_resets[] = {
[RST_MIXER0] = { 0x08, BIT(0) },
/*
* For A83T, H3 and R40, mixer1 reset line is shared with wb, so
* only RST_WB is exported here.
* For V3s there's just no mixer1, so it also shares this struct.
*/
[RST_WB] = { 0x08, BIT(2) },
};
static struct ccu_reset_map sun50i_a64_de2_resets[] = {
[RST_MIXER0] = { 0x08, BIT(0) },
[RST_MIXER1] = { 0x08, BIT(1) },
[RST_WB] = { 0x08, BIT(2) },
};
static const struct sunxi_ccu_desc sun8i_a83t_de2_clk_desc = {
.ccu_clks = sun8i_a83t_de2_clks,
.num_ccu_clks = ARRAY_SIZE(sun8i_a83t_de2_clks),
.hw_clks = &sun8i_a83t_de2_hw_clks,
.resets = sun8i_a83t_de2_resets,
.num_resets = ARRAY_SIZE(sun8i_a83t_de2_resets),
};
static const struct sunxi_ccu_desc sun50i_a64_de2_clk_desc = {
.ccu_clks = sun8i_a83t_de2_clks,
.num_ccu_clks = ARRAY_SIZE(sun8i_a83t_de2_clks),
.hw_clks = &sun8i_a83t_de2_hw_clks,
.resets = sun50i_a64_de2_resets,
.num_resets = ARRAY_SIZE(sun50i_a64_de2_resets),
};
static const struct sunxi_ccu_desc sun8i_v3s_de2_clk_desc = {
.ccu_clks = sun8i_v3s_de2_clks,
.num_ccu_clks = ARRAY_SIZE(sun8i_v3s_de2_clks),
.hw_clks = &sun8i_v3s_de2_hw_clks,
.resets = sun8i_a83t_de2_resets,
.num_resets = ARRAY_SIZE(sun8i_a83t_de2_resets),
};
static int sunxi_de2_clk_probe(struct platform_device *pdev)
{
struct resource *res;
struct clk *bus_clk, *mod_clk;
struct reset_control *rstc;
void __iomem *reg;
const struct sunxi_ccu_desc *ccu_desc;
int ret;
ccu_desc = of_device_get_match_data(&pdev->dev);
if (!ccu_desc)
return -EINVAL;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
reg = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(reg))
return PTR_ERR(reg);
bus_clk = devm_clk_get(&pdev->dev, "bus");
if (IS_ERR(bus_clk)) {
ret = PTR_ERR(bus_clk);
if (ret != -EPROBE_DEFER)
dev_err(&pdev->dev, "Couldn't get bus clk: %d\n", ret);
return ret;
}
mod_clk = devm_clk_get(&pdev->dev, "mod");
if (IS_ERR(mod_clk)) {
ret = PTR_ERR(mod_clk);
if (ret != -EPROBE_DEFER)
dev_err(&pdev->dev, "Couldn't get mod clk: %d\n", ret);
return ret;
}
rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL);
if (IS_ERR(rstc)) {
ret = PTR_ERR(rstc);
if (ret != -EPROBE_DEFER)
dev_err(&pdev->dev,
"Couldn't get reset control: %d\n", ret);
return ret;
}
/* The clocks need to be enabled for us to access the registers */
ret = clk_prepare_enable(bus_clk);
if (ret) {
dev_err(&pdev->dev, "Couldn't enable bus clk: %d\n", ret);
return ret;
}
ret = clk_prepare_enable(mod_clk);
if (ret) {
dev_err(&pdev->dev, "Couldn't enable mod clk: %d\n", ret);
goto err_disable_bus_clk;
}
/* The reset control needs to be asserted for the controls to work */
ret = reset_control_deassert(rstc);
if (ret) {
dev_err(&pdev->dev,
"Couldn't deassert reset control: %d\n", ret);
goto err_disable_mod_clk;
}
ret = sunxi_ccu_probe(pdev->dev.of_node, reg, ccu_desc);
if (ret)
goto err_assert_reset;
return 0;
err_assert_reset:
reset_control_assert(rstc);
err_disable_mod_clk:
clk_disable_unprepare(mod_clk);
err_disable_bus_clk:
clk_disable_unprepare(bus_clk);
return ret;
}
static const struct of_device_id sunxi_de2_clk_ids[] = {
{
.compatible = "allwinner,sun8i-a83t-de2-clk",
.data = &sun8i_a83t_de2_clk_desc,
},
{
.compatible = "allwinner,sun8i-v3s-de2-clk",
.data = &sun8i_v3s_de2_clk_desc,
},
{
.compatible = "allwinner,sun50i-h5-de2-clk",
.data = &sun50i_a64_de2_clk_desc,
},
/*
* The Allwinner A64 SoC needs some bit to be poke in syscon to make
* DE2 really working.
* So there's currently no A64 compatible here.
* H5 shares the same reset line with A64, so here H5 is using the
* clock description of A64.
*/
{ }
};
static struct platform_driver sunxi_de2_clk_driver = {
.probe = sunxi_de2_clk_probe,
.driver = {
.name = "sunxi-de2-clks",
.of_match_table = sunxi_de2_clk_ids,
},
};
builtin_platform_driver(sunxi_de2_clk_driver);
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