linux-kernel - Re: [PATCH v2] firmware: xilinx: Remove zynqmp_pm_get_eemi_ops() in IS_REACHABLE(CONFIG_ZYNQMP

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Message-ID: <81880da7-3a9d-cb6b-1391-b8f59fcd1a37@xilinx.com>
Date:   Fri, 12 Feb 2021 13:53:01 +0100
From:   Michal Simek <michal.simek@...inx.com>
To:     Nobuhiro Iwamatsu <iwamatsu@...auri.org>, <michal.simek@...inx.com>
CC:     <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v2] firmware: xilinx: Remove zynqmp_pm_get_eemi_ops() in
 IS_REACHABLE(CONFIG_ZYNQMP_FIRMWARE)



On 2/12/21 12:23 AM, Nobuhiro Iwamatsu wrote:
> zynqmp_pm_get_eemi_ops() was removed in commit 4db8180ffe7c: "Firmware: xilinx:
> Remove eemi ops for fpga related APIs", but not in IS_REACHABLE(CONFIG_ZYNQMP_FIRMWARE).
> Any driver who want to communicate with PMC using EEMI APIs use the functions provided
> for each function.
> This removed zynqmp_pm_get_eemi_ops() in IS_REACHABLE(CONFIG_ZYNQMP_FIRMWARE), and also
> modify the documentation for this driver.
> 
> Fixes: 4db8180ffe7c ("firmware: xilinx: Remove eemi ops for fpga related APIs")
> Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@...auri.org>
> ---
>  v2: Added the comment pointed out by Michal. 
> 
>  Documentation/driver-api/xilinx/eemi.rst | 27 +-----------------------
>  include/linux/firmware/xlnx-zynqmp.h     |  5 -----
>  2 files changed, 1 insertion(+), 31 deletions(-)
> 
> diff --git a/Documentation/driver-api/xilinx/eemi.rst b/Documentation/driver-api/xilinx/eemi.rst
> index 9dcbc6f18d75df..53416d25d309a8 100644
> --- a/Documentation/driver-api/xilinx/eemi.rst
> +++ b/Documentation/driver-api/xilinx/eemi.rst
> @@ -19,32 +19,7 @@ device to issue or respond to power management requests.
>  EEMI ops is a structure containing all eemi APIs supported by Zynq MPSoC.
>  The zynqmp-firmware driver maintain all EEMI APIs in zynqmp_eemi_ops
>  structure. Any driver who want to communicate with PMC using EEMI APIs
> -can call zynqmp_pm_get_eemi_ops().
> -
> -Example of EEMI ops::
> -
> -	/* zynqmp-firmware driver maintain all EEMI APIs */
> -	struct zynqmp_eemi_ops {
> -		int (*get_api_version)(u32 *version);
> -		int (*query_data)(struct zynqmp_pm_query_data qdata, u32 *out);
> -	};
> -
> -	static const struct zynqmp_eemi_ops eemi_ops = {
> -		.get_api_version = zynqmp_pm_get_api_version,
> -		.query_data = zynqmp_pm_query_data,
> -	};
> -
> -Example of EEMI ops usage::
> -
> -	static const struct zynqmp_eemi_ops *eemi_ops;
> -	u32 ret_payload[PAYLOAD_ARG_CNT];
> -	int ret;
> -
> -	eemi_ops = zynqmp_pm_get_eemi_ops();
> -	if (IS_ERR(eemi_ops))
> -		return PTR_ERR(eemi_ops);
> -
> -	ret = eemi_ops->query_data(qdata, ret_payload);
> +use the functions provided for each function.
>  
>  IOCTL
>  ------
> diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
> index 2a0da841c942f6..4ef77deaf7918c 100644
> --- a/include/linux/firmware/xlnx-zynqmp.h
> +++ b/include/linux/firmware/xlnx-zynqmp.h
> @@ -355,11 +355,6 @@ int zynqmp_pm_read_pggs(u32 index, u32 *value);
>  int zynqmp_pm_system_shutdown(const u32 type, const u32 subtype);
>  int zynqmp_pm_set_boot_health_status(u32 value);
>  #else
> -static inline struct zynqmp_eemi_ops *zynqmp_pm_get_eemi_ops(void)
> -{
> -	return ERR_PTR(-ENODEV);
> -}
> -
>  static inline int zynqmp_pm_get_api_version(u32 *version)
>  {
>  	return -ENODEV;
> 

I can't see any difference compare to v1. Don't you forget to commit
your changes?

Thanks,
Michal