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SubjectRe: [PATCH v3 7/7] clk: mediatek: Add MediaTek Helio X10 MT6795 clock drivers
Date
Hi Angelo,

> Add the clock drivers for the entire clock tree of MediaTek Helio X10
> MT6795, including system clocks (apmixedsys, infracfg, pericfg, topckgen)
> and multimedia clocks (mmsys, mfg, vdecsys, vencsys).
>
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
> ---
> drivers/clk/mediatek/Kconfig | 37 ++
> drivers/clk/mediatek/Makefile | 6 +
> drivers/clk/mediatek/clk-mt6795-apmixedsys.c | 157 +++++
> drivers/clk/mediatek/clk-mt6795-infracfg.c | 148 +++++
> drivers/clk/mediatek/clk-mt6795-mfg.c | 50 ++
> drivers/clk/mediatek/clk-mt6795-mm.c | 106 ++++
> drivers/clk/mediatek/clk-mt6795-pericfg.c | 160 +++++
> drivers/clk/mediatek/clk-mt6795-topckgen.c | 610 +++++++++++++++++++
> drivers/clk/mediatek/clk-mt6795-vdecsys.c | 55 ++
> drivers/clk/mediatek/clk-mt6795-vencsys.c | 50 ++
> 10 files changed, 1379 insertions(+)
> create mode 100644 drivers/clk/mediatek/clk-mt6795-apmixedsys.c
> create mode 100644 drivers/clk/mediatek/clk-mt6795-infracfg.c
> create mode 100644 drivers/clk/mediatek/clk-mt6795-mfg.c
> create mode 100644 drivers/clk/mediatek/clk-mt6795-mm.c
> create mode 100644 drivers/clk/mediatek/clk-mt6795-pericfg.c
> create mode 100644 drivers/clk/mediatek/clk-mt6795-topckgen.c
> create mode 100644 drivers/clk/mediatek/clk-mt6795-vdecsys.c
> create mode 100644 drivers/clk/mediatek/clk-mt6795-vencsys.c
>
> diff --git a/drivers/clk/mediatek/Kconfig b/drivers/clk/mediatek/Kconfig
> index d5936cfb3bee..da8142dff3c3 100644
> --- a/drivers/clk/mediatek/Kconfig
> +++ b/drivers/clk/mediatek/Kconfig
> @@ -259,6 +259,43 @@ config COMMON_CLK_MT6779_AUDSYS
> help
> This driver supports Mediatek MT6779 audsys clocks.
>
> +config COMMON_CLK_MT6795
> + tristate "Clock driver for MediaTek MT6795"
> + depends on ARCH_MEDIATEK || COMPILE_TEST
> + select COMMON_CLK_MEDIATEK
> + default ARCH_MEDIATEK
> + help
> + This driver supports MediaTek MT6795 basic clocks and clocks
> + required for various peripherals found on MediaTek.
> +
> +config COMMON_CLK_MT6795_MFGCFG
> + tristate "Clock driver for MediaTek MT6795 mfgcfg"
> + depends on COMMON_CLK_MT6795
> + default COMMON_CLK_MT6795
> + help
> + This driver supports MediaTek MT6795 mfgcfg clocks.
> +
> +config COMMON_CLK_MT6795_MMSYS
> + tristate "Clock driver for MediaTek MT6795 mmsys"

snip...

> + { /* sentinel */ }
> +};
> +
> +static int clk_mt6795_infracfg_probe(struct platform_device *pdev)
> +{
> + struct clk_hw_onecell_data *clk_data;
> + struct device_node *node = pdev->dev.of_node;
> + void __iomem *base;
> + int ret;
> +
> + base = devm_platform_ioremap_resource(pdev, 0);
> + if (IS_ERR(base))
> + return PTR_ERR(base);
> +
> + clk_data = mtk_alloc_clk_data(CLK_INFRA_NR_CLK);
> + if (!clk_data)
> + return -ENOMEM;
> +
> + ret = mtk_register_reset_controller_with_dev(&pdev->dev, &clk_rst_desc);
> + if (ret)
> + goto free_clk_data;
> +
> + ret = mtk_clk_register_gates(node, infra_gates, ARRAY_SIZE(infra_gates), clk_data);
> + if (ret)
> + goto free_clk_data;

While checking the error path, I learned that
mtk_register_reset_controller_with_dev uses devm_reset_controller_register and it will
be unregister the reset automatically if probe failed.

Thanks for this patch!

Reviewed-by: Miles Chen <miles.chen@mediatek.com>


thanks,
Miles

> +
> + ret = mtk_clk_register_cpumuxes(node, cpu_muxes, ARRAY_SIZE(cpu_muxes), clk_data);
> + if (ret)
> + goto unregister_gates;
> +
> + ret = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
> + if (ret)
> + goto unregister_cpumuxes;
> +
> + return 0;
> +
> +unregister_cpumuxes:
> + mtk_clk_unregister_cpumuxes(cpu_muxes, ARRAY_SIZE(cpu_muxes), clk_data);
> +unregister_gates:
> + mtk_clk_unregister_gates(infra_gates, ARRAY_SIZE(infra_gates), clk_data);
> +free_clk_data:
> + mtk_free_clk_data(clk_data);
> + return ret;
> +}
> +
> +static int clk_mt6795_infracfg_remove(struct platform_device *pdev)
> +{

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