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// SPDX-License-Identifier: GPL-2.0
/*
* StarFive JH7110 Video-Output Clock Driver
*
* Copyright (C) 2022-2023 StarFive Technology Co., Ltd.
*/
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/reset.h>
#include <dt-bindings/clock/starfive,jh7110-crg.h>
#include "clk-starfive-jh7110.h"
/* external clocks */
#define JH7110_VOUTCLK_VOUT_SRC (JH7110_VOUTCLK_END + 0)
#define JH7110_VOUTCLK_VOUT_TOP_AHB (JH7110_VOUTCLK_END + 1)
#define JH7110_VOUTCLK_VOUT_TOP_AXI (JH7110_VOUTCLK_END + 2)
#define JH7110_VOUTCLK_VOUT_TOP_HDMITX0_MCLK (JH7110_VOUTCLK_END + 3)
#define JH7110_VOUTCLK_I2STX0_BCLK (JH7110_VOUTCLK_END + 4)
#define JH7110_VOUTCLK_HDMITX0_PIXELCLK (JH7110_VOUTCLK_END + 5)
#define JH7110_VOUTCLK_EXT_END (JH7110_VOUTCLK_END + 6)
static struct clk_bulk_data jh7110_vout_top_clks[] = {
{ .id = "vout_src" },
{ .id = "vout_top_ahb" }
};
static const struct jh71x0_clk_data jh7110_voutclk_data[] = {
/* divider */
JH71X0__DIV(JH7110_VOUTCLK_APB, "apb", 8, JH7110_VOUTCLK_VOUT_TOP_AHB),
JH71X0__DIV(JH7110_VOUTCLK_DC8200_PIX, "dc8200_pix", 63, JH7110_VOUTCLK_VOUT_SRC),
JH71X0__DIV(JH7110_VOUTCLK_DSI_SYS, "dsi_sys", 31, JH7110_VOUTCLK_VOUT_SRC),
JH71X0__DIV(JH7110_VOUTCLK_TX_ESC, "tx_esc", 31, JH7110_VOUTCLK_VOUT_TOP_AHB),
/* dc8200 */
JH71X0_GATE(JH7110_VOUTCLK_DC8200_AXI, "dc8200_axi", 0, JH7110_VOUTCLK_VOUT_TOP_AXI),
JH71X0_GATE(JH7110_VOUTCLK_DC8200_CORE, "dc8200_core", 0, JH7110_VOUTCLK_VOUT_TOP_AXI),
JH71X0_GATE(JH7110_VOUTCLK_DC8200_AHB, "dc8200_ahb", 0, JH7110_VOUTCLK_VOUT_TOP_AHB),
JH71X0_GMUX(JH7110_VOUTCLK_DC8200_PIX0, "dc8200_pix0", 0, 2,
JH7110_VOUTCLK_DC8200_PIX,
JH7110_VOUTCLK_HDMITX0_PIXELCLK),
JH71X0_GMUX(JH7110_VOUTCLK_DC8200_PIX1, "dc8200_pix1", 0, 2,
JH7110_VOUTCLK_DC8200_PIX,
JH7110_VOUTCLK_HDMITX0_PIXELCLK),
/* LCD */
JH71X0_GMUX(JH7110_VOUTCLK_DOM_VOUT_TOP_LCD, "dom_vout_top_lcd", 0, 2,
JH7110_VOUTCLK_DC8200_PIX0,
JH7110_VOUTCLK_DC8200_PIX1),
/* dsiTx */
JH71X0_GATE(JH7110_VOUTCLK_DSITX_APB, "dsiTx_apb", 0, JH7110_VOUTCLK_DSI_SYS),
JH71X0_GATE(JH7110_VOUTCLK_DSITX_SYS, "dsiTx_sys", 0, JH7110_VOUTCLK_DSI_SYS),
JH71X0_GMUX(JH7110_VOUTCLK_DSITX_DPI, "dsiTx_dpi", 0, 2,
JH7110_VOUTCLK_DC8200_PIX,
JH7110_VOUTCLK_HDMITX0_PIXELCLK),
JH71X0_GATE(JH7110_VOUTCLK_DSITX_TXESC, "dsiTx_txesc", 0, JH7110_VOUTCLK_TX_ESC),
/* mipitx DPHY */
JH71X0_GATE(JH7110_VOUTCLK_MIPITX_DPHY_TXESC, "mipitx_dphy_txesc", 0,
JH7110_VOUTCLK_TX_ESC),
/* hdmi */
JH71X0_GATE(JH7110_VOUTCLK_HDMI_TX_MCLK, "hdmi_tx_mclk", 0,
JH7110_VOUTCLK_VOUT_TOP_HDMITX0_MCLK),
JH71X0_GATE(JH7110_VOUTCLK_HDMI_TX_BCLK, "hdmi_tx_bclk", 0,
JH7110_VOUTCLK_I2STX0_BCLK),
JH71X0_GATE(JH7110_VOUTCLK_HDMI_TX_SYS, "hdmi_tx_sys", 0, JH7110_VOUTCLK_APB),
};
static int jh7110_vout_top_rst_init(struct jh71x0_clk_priv *priv)
{
struct reset_control *top_rst;
/* The reset should be shared and other Vout modules will use its. */
top_rst = devm_reset_control_get_shared(priv->dev, NULL);
if (IS_ERR(top_rst))
return dev_err_probe(priv->dev, PTR_ERR(top_rst), "failed to get top reset\n");
return reset_control_deassert(top_rst);
}
static struct clk_hw *jh7110_voutclk_get(struct of_phandle_args *clkspec, void *data)
{
struct jh71x0_clk_priv *priv = data;
unsigned int idx = clkspec->args[0];
if (idx < JH7110_VOUTCLK_END)
return &priv->reg[idx].hw;
return ERR_PTR(-EINVAL);
}
#ifdef CONFIG_PM
static int jh7110_voutcrg_suspend(struct device *dev)
{
struct jh7110_top_sysclk *top = dev_get_drvdata(dev);
clk_bulk_disable_unprepare(top->top_clks_num, top->top_clks);
return 0;
}
static int jh7110_voutcrg_resume(struct device *dev)
{
struct jh7110_top_sysclk *top = dev_get_drvdata(dev);
return clk_bulk_prepare_enable(top->top_clks_num, top->top_clks);
}
static const struct dev_pm_ops jh7110_voutcrg_pm_ops = {
RUNTIME_PM_OPS(jh7110_voutcrg_suspend, jh7110_voutcrg_resume, NULL)
};
#endif
static int jh7110_voutcrg_probe(struct platform_device *pdev)
{
struct jh71x0_clk_priv *priv;
struct jh7110_top_sysclk *top;
unsigned int idx;
int ret;
priv = devm_kzalloc(&pdev->dev,
struct_size(priv, reg, JH7110_VOUTCLK_END),
GFP_KERNEL);
if (!priv)
return -ENOMEM;
top = devm_kzalloc(&pdev->dev, sizeof(*top), GFP_KERNEL);
if (!top)
return -ENOMEM;
spin_lock_init(&priv->rmw_lock);
priv->dev = &pdev->dev;
priv->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(priv->base))
return PTR_ERR(priv->base);
top->top_clks = jh7110_vout_top_clks;
top->top_clks_num = ARRAY_SIZE(jh7110_vout_top_clks);
ret = devm_clk_bulk_get(priv->dev, top->top_clks_num, top->top_clks);
if (ret)
return dev_err_probe(priv->dev, ret, "failed to get top clocks\n");
dev_set_drvdata(priv->dev, top);
/* enable power domain and clocks */
pm_runtime_enable(priv->dev);
ret = pm_runtime_get_sync(priv->dev);
if (ret < 0)
return dev_err_probe(priv->dev, ret, "failed to turn on power\n");
ret = jh7110_vout_top_rst_init(priv);
if (ret)
goto err_exit;
for (idx = 0; idx < JH7110_VOUTCLK_END; idx++) {
u32 max = jh7110_voutclk_data[idx].max;
struct clk_parent_data parents[4] = {};
struct clk_init_data init = {
.name = jh7110_voutclk_data[idx].name,
.ops = starfive_jh71x0_clk_ops(max),
.parent_data = parents,
.num_parents =
((max & JH71X0_CLK_MUX_MASK) >> JH71X0_CLK_MUX_SHIFT) + 1,
.flags = jh7110_voutclk_data[idx].flags,
};
struct jh71x0_clk *clk = &priv->reg[idx];
unsigned int i;
const char *fw_name[JH7110_VOUTCLK_EXT_END - JH7110_VOUTCLK_END] = {
"vout_src",
"vout_top_ahb",
"vout_top_axi",
"vout_top_hdmitx0_mclk",
"i2stx0_bclk",
"hdmitx0_pixelclk"
};
for (i = 0; i < init.num_parents; i++) {
unsigned int pidx = jh7110_voutclk_data[idx].parents[i];
if (pidx < JH7110_VOUTCLK_END)
parents[i].hw = &priv->reg[pidx].hw;
else if (pidx < JH7110_VOUTCLK_EXT_END)
parents[i].fw_name = fw_name[pidx - JH7110_VOUTCLK_END];
}
clk->hw.init = &init;
clk->idx = idx;
clk->max_div = max & JH71X0_CLK_DIV_MASK;
ret = devm_clk_hw_register(&pdev->dev, &clk->hw);
if (ret)
goto err_exit;
}
ret = devm_of_clk_add_hw_provider(&pdev->dev, jh7110_voutclk_get, priv);
if (ret)
goto err_exit;
ret = jh7110_reset_controller_register(priv, "rst-vo", 4);
if (ret)
goto err_exit;
return 0;
err_exit:
pm_runtime_put_sync(priv->dev);
pm_runtime_disable(priv->dev);
return ret;
}
static int jh7110_voutcrg_remove(struct platform_device *pdev)
{
pm_runtime_put_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);
return 0;
}
static const struct of_device_id jh7110_voutcrg_match[] = {
{ .compatible = "starfive,jh7110-voutcrg" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, jh7110_voutcrg_match);
static struct platform_driver jh7110_voutcrg_driver = {
.probe = jh7110_voutcrg_probe,
.remove = jh7110_voutcrg_remove,
.driver = {
.name = "clk-starfive-jh7110-vout",
.of_match_table = jh7110_voutcrg_match,
.pm = pm_ptr(&jh7110_voutcrg_pm_ops),
},
};
module_platform_driver(jh7110_voutcrg_driver);
MODULE_AUTHOR("Xingyu Wu <xingyu.wu@starfivetech.com>");
MODULE_DESCRIPTION("StarFive JH7110 Video-Output clock driver");
MODULE_LICENSE("GPL");
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