linux-kernel - Re: [PATCH V4 1/2] firmware: imx: add dummy functions

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Message-ID: <a5134838-53d4-97f0-d126-b94164871763@nxp.com>
Date:   Thu, 20 Feb 2020 07:44:20 +0000
From:   Daniel Baluta <daniel.baluta@....com>
To:     Peng Fan <peng.fan@....com>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>
CC:     "festevam@...il.com" <festevam@...il.com>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        dl-linux-imx <linux-imx@....com>,
        "olof@...om.net" <olof@...om.net>,
        Aisheng Dong <aisheng.dong@....com>,
        Leonard Crestez <leonard.crestez@....com>,
        Abel Vesa <abel.vesa@....com>,
        "krzk@...nel.org" <krzk@...nel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "daniel.baluta@...il.com" <daniel.baluta@...il.com>
Subject: Re: [PATCH V4 1/2] firmware: imx: add dummy functions

On 20.02.2020 08:24, Peng Fan wrote:
> From: Peng Fan <peng.fan@....com>
>
> IMX_SCU_SOC could be enabled with COMPILE_TEST, however there is
> no dummy functions when CONFIG_IMX_SCU not defined. Then there
> will be build failure.
>
> So add dummy functions to avoid build failure for COMPILE_TEST
>
> Signed-off-by: Peng Fan <peng.fan@....com>
> ---
>   include/linux/firmware/imx/ipc.h      | 13 +++++++++++++
>   include/linux/firmware/imx/sci.h      | 22 ++++++++++++++++++++++
>   include/linux/firmware/imx/svc/misc.h | 19 +++++++++++++++++++
>   3 files changed, 54 insertions(+)
>
> diff --git a/include/linux/firmware/imx/ipc.h b/include/linux/firmware/imx/ipc.h
> index 6312c8cb084a..30475082f472 100644
> --- a/include/linux/firmware/imx/ipc.h
> +++ b/include/linux/firmware/imx/ipc.h
> @@ -35,6 +35,7 @@ struct imx_sc_rpc_msg {
>   	uint8_t func;
>   };
>   
> +#ifdef CONFIG_IMX_SCU
>   /*
>    * This is an function to send an RPC message over an IPC channel.
>    * It is called by client-side SCFW API function shims.
> @@ -56,4 +57,16 @@ int imx_scu_call_rpc(struct imx_sc_ipc *ipc, void *msg, bool have_resp);
>    * @return Returns an error code (0 = success, failed if < 0)
>    */
>   int imx_scu_get_handle(struct imx_sc_ipc **ipc);
> +#else
> +static inline int imx_scu_call_rpc(struct imx_sc_ipc *ipc, void *msg,
> +				   bool have_resp)
> +{
> +	return -ENOTSUPP;
> +}
> +
> +static inline int imx_scu_get_handle(struct imx_sc_ipc **ipc)
> +{
> +	return -ENOTSUPP;
> +}
> +#endif
>   #endif /* _SC_IPC_H */
> diff --git a/include/linux/firmware/imx/sci.h b/include/linux/firmware/imx/sci.h
> index 17ba4e405129..7ea875b186e3 100644
> --- a/include/linux/firmware/imx/sci.h
> +++ b/include/linux/firmware/imx/sci.h
> @@ -16,8 +16,30 @@
>   #include <linux/firmware/imx/svc/misc.h>
>   #include <linux/firmware/imx/svc/pm.h>
>   
> +#ifdef CONFIG_IMX_SCU
>   int imx_scu_enable_general_irq_channel(struct device *dev);
>   int imx_scu_irq_register_notifier(struct notifier_block *nb);
>   int imx_scu_irq_unregister_notifier(struct notifier_block *nb);
>   int imx_scu_irq_group_enable(u8 group, u32 mask, u8 enable);
> +#else
> +static inline int imx_scu_enable_general_irq_channel(struct device *dev)
> +{
> +	return -ENOTSUPP;
> +}
> +
> +static inline int imx_scu_irq_register_notifier(struct notifier_block *nb)
> +{
> +	return -ENOTSUPP;
> +}
> +
> +static inline int imx_scu_irq_unregister_notifier(struct notifier_block *nb)
> +{
> +	return -ENOTSUPP;
> +}
> +
> +static inline int imx_scu_irq_group_enable(u8 group, u32 mask, u8 enable)
> +{
> +	return -ENOTSUPP;
> +}
> +#endif
>   #endif /* _SC_SCI_H */
> diff --git a/include/linux/firmware/imx/svc/misc.h b/include/linux/firmware/imx/svc/misc.h
> index 031dd4d3c766..3f4a0f526b73 100644
> --- a/include/linux/firmware/imx/svc/misc.h
> +++ b/include/linux/firmware/imx/svc/misc.h
> @@ -46,6 +46,7 @@ enum imx_misc_func {
>    * Control Functions
>    */
>   
> +#ifdef CONFIG_IMX_SCU
>   int imx_sc_misc_set_control(struct imx_sc_ipc *ipc, u32 resource,
>   			    u8 ctrl, u32 val);
>   
> @@ -54,5 +55,23 @@ int imx_sc_misc_get_control(struct imx_sc_ipc *ipc, u32 resource,
>   
>   int imx_sc_pm_cpu_start(struct imx_sc_ipc *ipc, u32 resource,
>   			bool enable, u64 phys_addr);
> +#else
Functions for dummy case below should be static inline.
> +int imx_sc_misc_set_control(struct imx_sc_ipc *ipc, u32 resource,
> +			    u8 ctrl, u32 val)
> +{
> +	return -ENOTSUPP;
> +}
> +
> +int imx_sc_misc_get_control(struct imx_sc_ipc *ipc, u32 resource,
> +			    u8 ctrl, u32 *val)
> +{
> +	return -ENOTSUPP;
> +}
>   
> +int imx_sc_pm_cpu_start(struct imx_sc_ipc *ipc, u32 resource,
> +			bool enable, u64 phys_addr)
> +{
> +	return -ENOTSUPP;
> +}
> +#endif
>   #endif /* _SC_MISC_API_H */