linux-kernel - Re: [RESEND PATCH 3/8] mfd: cros_ec: Instantiate sub-devices from device tree

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Date:	Sat, 25 Apr 2015 18:34:37 -0700
From:	Gwendal Grignou <gwendal@...omium.org>
To:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>
Cc:	Olof Johansson <olof@...om.net>, Lee Jones <lee.jones@...aro.org>,
	Doug Anderson <dianders@...omium.org>,
	Bill Richardson <wfrichar@...omium.org>,
	Simon Glass <sjg@...gle.com>,
	Stephen Barber <smbarber@...omium.org>,
	Filipe Brandenburger <filbranden@...gle.com>,
	Todd Broch <tbroch@...omium.org>,
	linux-samsung-soc@...r.kernel.org,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [RESEND PATCH 3/8] mfd: cros_ec: Instantiate sub-devices from
 device tree

Reviewed-by: Gwendal Grignou <gwendal@...omium.org>
Tested-by: Gwendal Grignou <gwendal@...omium.org>

On Mon, Apr 6, 2015 at 9:15 AM, Javier Martinez Canillas
<javier.martinez@...labora.co.uk> wrote:
> From: Todd Broch <tbroch@...omium.org>
>
> If the EC device tree node has sub-nodes, try to instantiate them as
> MFD sub-devices.  We can configure the EC features provided by the board.
>
> Signed-off-by: Todd Broch <tbroch@...omium.org>
> Signed-off-by: Javier Martinez Canillas <javier.martinez@...labora.co.uk>
> ---
>  drivers/mfd/cros_ec.c | 22 +++++++++++-----------
>  1 file changed, 11 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/mfd/cros_ec.c b/drivers/mfd/cros_ec.c
> index c4aecc6f8373..8aa83b91e25c 100644
> --- a/drivers/mfd/cros_ec.c
> +++ b/drivers/mfd/cros_ec.c
> @@ -17,6 +17,7 @@
>   * battery charging and regulator control, firmware update.
>   */
>
> +#include <linux/of_platform.h>
>  #include <linux/interrupt.h>
>  #include <linux/slab.h>
>  #include <linux/module.h>
> @@ -109,18 +110,8 @@ EXPORT_SYMBOL(cros_ec_cmd_xfer);
>
>  static const struct mfd_cell cros_devs[] = {
>         {
> -               .name = "cros-ec-keyb",
> -               .id = 1,
> -               .of_compatible = "google,cros-ec-keyb",
> -       },
> -       {
> -               .name = "cros-ec-i2c-tunnel",
> -               .id = 2,
> -               .of_compatible = "google,cros-ec-i2c-tunnel",
> -       },
> -       {
>                 .name = "cros-ec-ctl",
> -               .id = 3,
> +               .id = 1,
>         },
>  };
>
> @@ -150,6 +141,15 @@ int cros_ec_register(struct cros_ec_device *ec_dev)
>                 return err;
>         }
>
> +#ifdef CONFIG_OF
> +       err = of_platform_populate(dev->of_node, NULL, NULL, dev);
> +       if (err) {
> +               mfd_remove_devices(dev);
> +               dev_err(dev, "Failed to register sub-devices\n");
> +               return err;
> +       }
> +#endif
> +
>         dev_info(dev, "Chrome EC device registered\n");
>
>         return 0;
> --
> 2.1.4
>
--
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