Re: [PATCH v7 6/9] clk: starfive: Add StarFive JH7110 Video-Output clock driver

Xingyu Wu
2023-07-13T02:18:07Z

On 2023/7/13 2:08, Emil Renner Berthing wrote:
> On Wed, 12 Jul 2023 at 11:22, Xingyu Wu <xingyu.wu@starfivetech.com> wrote:
>>
>> Add driver for the StarFive JH7110 Video-Output clock controller.
>> And these clock controllers should power on and enable the clocks from
>> SYSCRG first before registering.
>>
>> Reviewed-by: Hal Feng <hal.feng@starfivetech.com>
>> Signed-off-by: Xingyu Wu <xingyu.wu@starfivetech.com>
>> ---
>> drivers/clk/starfive/Kconfig | 8 +
>> drivers/clk/starfive/Makefile | 1 +
>> .../clk/starfive/clk-starfive-jh7110-vout.c | 239 ++++++++++++++++++
>> 3 files changed, 248 insertions(+)
>> create mode 100644 drivers/clk/starfive/clk-starfive-jh7110-vout.c
>>
>> diff --git a/drivers/clk/starfive/Kconfig b/drivers/clk/starfive/Kconfig
>> index 13b4d08cbcd2..3fa983eb7d32 100644
>> --- a/drivers/clk/starfive/Kconfig
>> +++ b/drivers/clk/starfive/Kconfig
>> @@ -55,3 +55,11 @@ config CLK_STARFIVE_JH7110_ISP
>> help
>> Say yes here to support the Image-Signal-Process clock controller
>> on the StarFive JH7110 SoC.
>> +
>> +config CLK_STARFIVE_JH7110_VOUT
>> + tristate "StarFive JH7110 Video-Output clock support"
>> + depends on CLK_STARFIVE_JH7110_SYS && JH71XX_PMU
>> + default m if ARCH_STARFIVE
>> + help
>> + Say yes here to support the Video-Output clock controller
>> + on the StarFive JH7110 SoC.
>> diff --git a/drivers/clk/starfive/Makefile b/drivers/clk/starfive/Makefile
>> index 76fb9f8d628b..841377e45bb6 100644
>> --- a/drivers/clk/starfive/Makefile
>> +++ b/drivers/clk/starfive/Makefile
>> @@ -8,3 +8,4 @@ obj-$(CONFIG_CLK_STARFIVE_JH7110_SYS) += clk-starfive-jh7110-sys.o
>> obj-$(CONFIG_CLK_STARFIVE_JH7110_AON) += clk-starfive-jh7110-aon.o
>> obj-$(CONFIG_CLK_STARFIVE_JH7110_STG) += clk-starfive-jh7110-stg.o
>> obj-$(CONFIG_CLK_STARFIVE_JH7110_ISP) += clk-starfive-jh7110-isp.o
>> +obj-$(CONFIG_CLK_STARFIVE_JH7110_VOUT) += clk-starfive-jh7110-vout.o
>> diff --git a/drivers/clk/starfive/clk-starfive-jh7110-vout.c b/drivers/clk/starfive/clk-starfive-jh7110-vout.c
>> new file mode 100644
>> index 000000000000..743840e03d81
>> --- /dev/null
>> +++ b/drivers/clk/starfive/clk-starfive-jh7110-vout.c
>> @@ -0,0 +1,239 @@
>> +// 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 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 top_sysclk *top = dev_get_drvdata(dev);
>> +
>> + return clk_bulk_prepare_enable(top->top_clks_num, top->top_clks);
>> +}
>> +#endif
>
> nit: you could move this #endif down below jh7110_voutcrg_pm_ops, and then do
>
> .pm = pm_ptr(&jh7110_voutcrg_pm_ops),
>
> In any case
> Reviewed-by: Emil Renner Berthing <emil.renner.berthing@canonical.com>

Will fix in both VOUTCRG and ISPCEG drivers. Thanks.

Best regards,
Xingyu Wu

>
>> +static const struct dev_pm_ops jh7110_voutcrg_pm_ops = {
>> + SET_RUNTIME_PM_OPS(jh7110_voutcrg_suspend, jh7110_voutcrg_resume, NULL)
>> +};
>> +
>> +static int jh7110_voutcrg_probe(struct platform_device *pdev)
>> +{
>> + struct jh71x0_clk_priv *priv;
>> + struct 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 = &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");
>> --