linux-kernel - Re: [PATCH 1/2] reset: Add API to count number of reset available with device

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Date:   Fri, 10 Mar 2017 20:10:20 +0530
From:   Vivek Gautam <vivek.gautam@...eaurora.org>
To:     Felipe Balbi <balbi@...nel.org>, p.zabel@...gutronix.de
Cc:     Greg KH <gregkh@...uxfoundation.org>,
        Linux USB Mailing List <linux-usb@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        linux-arm-msm@...r.kernel.org,
        Vivek Gautam <vivek.gautam@...eaurora.org>
Subject: Re: [PATCH 1/2] reset: Add API to count number of reset available
 with device

Hi Philipp,


On Wed, Feb 22, 2017 at 10:54 AM, Vivek Gautam
<vivek.gautam@...eaurora.org> wrote:
> Count number of reset phandles available with the device node
> to know the resets a given device has.
>
> Cc: Philipp Zabel <p.zabel@...gutronix.de>
> Signed-off-by: Vivek Gautam <vivek.gautam@...eaurora.org>
> ---

Any thoughts on this change?
A small addition that seems useful.

>
> Based on torvald's master branch.
>
>  include/linux/reset.h | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
>
> diff --git a/include/linux/reset.h b/include/linux/reset.h
> index 5daff15722d3..88f63a640153 100644
> --- a/include/linux/reset.h
> +++ b/include/linux/reset.h
> @@ -2,6 +2,7 @@
>  #define _LINUX_RESET_H_
>
>  #include <linux/device.h>
> +#include <linux/of.h>
>
>  struct reset_control;
>
> @@ -234,6 +235,21 @@ static inline struct reset_control *of_reset_control_get_shared_by_index(
>  }
>
>  /**
> + * of_reset_control_get_count - Count number of resets available with a device
> + * @node: device to be reset by the controller
> + */
> +static inline unsigned int of_reset_control_get_count(struct device_node *node)
> +{
> +       int count;
> +
> +       count = of_count_phandle_with_args(node, "resets", "#reset-cells");
> +       if (count < 0)
> +               return 0;
> +
> +       return count;
> +}
> +
> +/**
>   * devm_reset_control_get_exclusive - resource managed
>   *                                    reset_control_get_exclusive()
>   * @dev: device to be reset by the controller
> --
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Regards
Vivek
-- 
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project