Re: [PATCH 2/7] ASoC: mediatek: mt79xx: support audio clock control

[<Claudiu.Beznea@microchip.com>]

On 12.06.2023 13:52, Maso Hunag wrote:
> [You don't often get email from maso.huang@mediatek.com. Learn why this is important at https://aka.ms/LearnAboutSenderIdentification ]
> 
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
> 
> From: Maso Huang <maso.huang@mediatek.com>
> 
> Add audio clock wrapper and audio tuner control.
> 
> Signed-off-by: Maso Huang <maso.huang@mediatek.com>
> ---
>  sound/soc/mediatek/mt79xx/mt79xx-afe-clk.c | 123 +++++++++++++++++++++
>  sound/soc/mediatek/mt79xx/mt79xx-afe-clk.h |  18 +++
>  2 files changed, 141 insertions(+)
>  create mode 100644 sound/soc/mediatek/mt79xx/mt79xx-afe-clk.c
>  create mode 100644 sound/soc/mediatek/mt79xx/mt79xx-afe-clk.h
> 
> diff --git a/sound/soc/mediatek/mt79xx/mt79xx-afe-clk.c b/sound/soc/mediatek/mt79xx/mt79xx-afe-clk.c
> new file mode 100644
> index 000000000000..f00f0d7de861
> --- /dev/null
> +++ b/sound/soc/mediatek/mt79xx/mt79xx-afe-clk.c
> @@ -0,0 +1,123 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * mt79xx-afe-clk.c  --  MediaTek 79xx afe clock ctrl
> + *
> + * Copyright (c) 2021 MediaTek Inc.
> + * Author: Vic Wu <vic.wu@mediatek.com>
> + *         Maso Huang <maso.huang@mediatek.com>
> + */
> +
> +#include <linux/clk.h>
> +
> +#include "mt79xx-afe-common.h"
> +#include "mt79xx-afe-clk.h"
> +#include "mt79xx-reg.h"
> +
> +enum {
> +       CK_INFRA_AUD_BUS_CK = 0,
> +       CK_INFRA_AUD_26M_CK,
> +       CK_INFRA_AUD_L_CK,
> +       CK_INFRA_AUD_AUD_CK,
> +       CK_INFRA_AUD_EG2_CK,
> +       CLK_NUM
> +};
> +
> +static const char *aud_clks[CLK_NUM] = {
> +       [CK_INFRA_AUD_BUS_CK] = "aud_bus_ck",
> +       [CK_INFRA_AUD_26M_CK] = "aud_26m_ck",
> +       [CK_INFRA_AUD_L_CK] = "aud_l_ck",
> +       [CK_INFRA_AUD_AUD_CK] = "aud_aud_ck",
> +       [CK_INFRA_AUD_EG2_CK] = "aud_eg2_ck",
> +};
> +
> +int mt79xx_init_clock(struct mtk_base_afe *afe)
> +{
> +       struct mt79xx_afe_private *afe_priv = afe->platform_priv;
> +       int i;
> +
> +       afe_priv->clk = devm_kcalloc(afe->dev, CLK_NUM, sizeof(*afe_priv->clk),
> +                                    GFP_KERNEL);
> +       if (!afe_priv->clk)
> +               return -ENOMEM;
> +
> +       for (i = 0; i < CLK_NUM; i++) {
> +               afe_priv->clk[i] = devm_clk_get(afe->dev, aud_clks[i]);
> +               if (IS_ERR(afe_priv->clk[i])) {
> +                       dev_err(afe->dev, "%s(), devm_clk_get %s fail,
> +                               ret %ld\n", __func__, aud_clks[i],
> +                               PTR_ERR(afe_priv->clk[i]));
> +                       return PTR_ERR(afe_priv->clk[i]);
> +               }
> +       }

You can use devm_clk_bulk_get()

> +
> +       return 0;
> +}
> +
> +int mt79xx_afe_enable_clock(struct mtk_base_afe *afe)
> +{
> +       struct mt79xx_afe_private *afe_priv = afe->platform_priv;
> +       int ret;
> +
> +       ret = clk_prepare_enable(afe_priv->clk[CK_INFRA_AUD_BUS_CK]);
> +       if (ret) {
> +               dev_err(afe->dev, "%s(), clk_prepare_enable %s fail %d\n",
> +                       __func__, aud_clks[CK_INFRA_AUD_BUS_CK], ret);
> +               goto CK_INFRA_AUD_BUS_CK_ERR;
> +       }
> +
> +       ret = clk_prepare_enable(afe_priv->clk[CK_INFRA_AUD_26M_CK]);
> +       if (ret) {
> +               dev_err(afe->dev, "%s(), clk_prepare_enable %s fail %d\n",
> +                       __func__, aud_clks[CK_INFRA_AUD_26M_CK], ret);
> +               goto CK_INFRA_AUD_26M_ERR;
> +       }
> +
> +       ret = clk_prepare_enable(afe_priv->clk[CK_INFRA_AUD_L_CK]);
> +       if (ret) {
> +               dev_err(afe->dev, "%s(), clk_prepare_enable %s fail %d\n",
> +                       __func__, aud_clks[CK_INFRA_AUD_L_CK], ret);
> +               goto CK_INFRA_AUD_L_CK_ERR;
> +       }
> +
> +       ret = clk_prepare_enable(afe_priv->clk[CK_INFRA_AUD_AUD_CK]);
> +       if (ret) {
> +               dev_err(afe->dev, "%s clk_prepare_enable %s fail %d\n",
> +                       __func__, aud_clks[CK_INFRA_AUD_AUD_CK], ret);
> +               goto CK_INFRA_AUD_AUD_CK_ERR;
> +       }
> +
> +       ret = clk_prepare_enable(afe_priv->clk[CK_INFRA_AUD_EG2_CK]);
> +       if (ret) {
> +               dev_err(afe->dev, "%s clk_prepare_enable %s fail %d\n",
> +                       __func__, aud_clks[CK_INFRA_AUD_EG2_CK], ret);
> +               goto CK_INFRA_AUD_EG2_CK_ERR;
> +       }

And clk_bulk_prepare_enable() instead all these.

> +
> +       return 0;
> +
> +CK_INFRA_AUD_EG2_CK_ERR:
> +       clk_disable_unprepare(afe_priv->clk[CK_INFRA_AUD_AUD_CK]);
> +CK_INFRA_AUD_AUD_CK_ERR:
> +       clk_disable_unprepare(afe_priv->clk[CK_INFRA_AUD_L_CK]);
> +CK_INFRA_AUD_L_CK_ERR:
> +       clk_disable_unprepare(afe_priv->clk[CK_INFRA_AUD_26M_CK]);
> +CK_INFRA_AUD_26M_ERR:
> +       clk_disable_unprepare(afe_priv->clk[CK_INFRA_AUD_BUS_CK]);
> +CK_INFRA_AUD_BUS_CK_ERR:
> +       return ret;
> +}
> +EXPORT_SYMBOL_GPL(mt79xx_afe_enable_clock);
> +
> +int mt79xx_afe_disable_clock(struct mtk_base_afe *afe)
> +{
> +       struct mt79xx_afe_private *afe_priv = afe->platform_priv;
> +
> +       clk_disable_unprepare(afe_priv->clk[CK_INFRA_AUD_EG2_CK]);
> +       clk_disable_unprepare(afe_priv->clk[CK_INFRA_AUD_AUD_CK]);
> +       clk_disable_unprepare(afe_priv->clk[CK_INFRA_AUD_L_CK]);
> +       clk_disable_unprepare(afe_priv->clk[CK_INFRA_AUD_26M_CK]);
> +       clk_disable_unprepare(afe_priv->clk[CK_INFRA_AUD_BUS_CK]);
> +

And also clk_bulk_disable_unprepare() here.

> +       return 0;
> +}
> +EXPORT_SYMBOL_GPL(mt79xx_afe_disable_clock);
> diff --git a/sound/soc/mediatek/mt79xx/mt79xx-afe-clk.h b/sound/soc/mediatek/mt79xx/mt79xx-afe-clk.h
> new file mode 100644
> index 000000000000..bf9c3edb6922
> --- /dev/null
> +++ b/sound/soc/mediatek/mt79xx/mt79xx-afe-clk.h
> @@ -0,0 +1,18 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * mt79xx-afe-clk.h  --  MediaTek 79xx afe clock ctrl definition
> + *
> + * Copyright (c) 2021 MediaTek Inc.
> + * Author: Vic Wu <vic.wu@mediatek.com>
> + *         Maso Huang <maso.huang@mediatek.com>
> + */
> +
> +#ifndef _MT79XX_AFE_CLK_H_
> +#define _MT79XX_AFE_CLK_H_
> +
> +struct mtk_base_afe;
> +
> +int mt79xx_init_clock(struct mtk_base_afe *afe);
> +int mt79xx_afe_enable_clock(struct mtk_base_afe *afe);
> +int mt79xx_afe_disable_clock(struct mtk_base_afe *afe);
> +#endif
> --
> 2.18.0
> 
> 
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel