linux-kernel - Re: [PATCH v3] firmware: xilinx: Remove zynqmp_pm_get_eemi_ops() in IS_REACHABLE(CONFIG_ZYNQMP

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Message-ID: <a84e9ebe-0099-8841-fb26-54d123fb79fb@xilinx.com>
Date:   Tue, 16 Feb 2021 07:48:09 +0100
From:   Michal Simek <michal.simek@...inx.com>
To:     Nobuhiro Iwamatsu <iwamatsu@...auri.org>, <michal.simek@...inx.com>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3] firmware: xilinx: Remove zynqmp_pm_get_eemi_ops() in
 IS_REACHABLE(CONFIG_ZYNQMP_FIRMWARE)



On 2/15/21 4:58 PM, 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>
> ---
>  v3: Update eemi.rst.
>  v2: Added the comment pointed out by Michal.  
> 
>  Documentation/driver-api/xilinx/eemi.rst | 31 ++----------------------
>  include/linux/firmware/xlnx-zynqmp.h     |  5 ----
>  2 files changed, 2 insertions(+), 34 deletions(-)
> 
> diff --git a/Documentation/driver-api/xilinx/eemi.rst b/Documentation/driver-api/xilinx/eemi.rst
> index 9dcbc6f18d75df..579cf9a407ac2f 100644
> --- a/Documentation/driver-api/xilinx/eemi.rst
> +++ b/Documentation/driver-api/xilinx/eemi.rst
> @@ -16,35 +16,8 @@ components running across different processing clusters on a chip or
>  device to communicate with a power management controller (PMC) on a
>  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);
> +Any driver who want to communicate with PMC using EEMI APIs use the

wants

> +functions provided for each function.
>  
>  IOCTL
>  ------
> diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
> index c8a18da6906e78..70e19ab34ff1ca 100644
> --- a/include/linux/firmware/xlnx-zynqmp.h
> +++ b/include/linux/firmware/xlnx-zynqmp.h
> @@ -416,11 +416,6 @@ 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;
> 

Queue for 5.13 with corrected sentence above.

Thanks,
Michal