From: Mathieu Poirier <mathieu.poirier@linaro.org>
To: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Cc: andersson@kernel.org, matthias.bgg@gmail.com,
tinghan.shen@mediatek.com, linux-remoteproc@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org, wenst@chromium.org,
kernel@collabora.com
Subject: Re: [PATCH] remoteproc: mediatek: Refactor single core check and fix retrocompatibility
Date: Thu, 21 Sep 2023 06:51:29 -0600 [thread overview]
Message-ID: <ZQw8UdZ9vhsrggky@p14s> (raw)
In-Reply-To: <20230919092336.51007-1-angelogioacchino.delregno@collabora.com>
On Tue, Sep 19, 2023 at 11:23:36AM +0200, AngeloGioacchino Del Regno wrote:
> In older devicetrees we had the ChromeOS EC in a node called "cros-ec"
> instead of the newer "cros-ec-rpmsg", but this driver is now checking
> only for the latter, breaking compatibility with those.
>
> Besides, we can check if the SCP is single or dual core by simply
> walking through the children of the main SCP node and checking if
> if there's more than one "mediatek,scp-core" compatible node.
>
> Fixes: 1fdbf0cdde98 ("remoteproc: mediatek: Probe SCP cluster on multi-core SCP")
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> ---
> drivers/remoteproc/mtk_scp.c | 18 +++++++-----------
> 1 file changed, 7 insertions(+), 11 deletions(-)
>
Applied.
Thanks,
Mathieu
> diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
> index ea227b566c54..a35409eda0cf 100644
> --- a/drivers/remoteproc/mtk_scp.c
> +++ b/drivers/remoteproc/mtk_scp.c
> @@ -1144,29 +1144,25 @@ static int scp_add_multi_core(struct platform_device *pdev,
> return ret;
> }
>
> -static int scp_is_single_core(struct platform_device *pdev)
> +static bool scp_is_single_core(struct platform_device *pdev)
> {
> struct device *dev = &pdev->dev;
> struct device_node *np = dev_of_node(dev);
> struct device_node *child;
> + int num_cores = 0;
>
> - child = of_get_next_available_child(np, NULL);
> - if (!child)
> - return dev_err_probe(dev, -ENODEV, "No child node\n");
> + for_each_child_of_node(np, child)
> + if (of_device_is_compatible(child, "mediatek,scp-core"))
> + num_cores++;
>
> - of_node_put(child);
> - return of_node_name_eq(child, "cros-ec-rpmsg");
> + return num_cores < 2;
> }
>
> static int scp_cluster_init(struct platform_device *pdev, struct mtk_scp_of_cluster *scp_cluster)
> {
> int ret;
>
> - ret = scp_is_single_core(pdev);
> - if (ret < 0)
> - return ret;
> -
> - if (ret)
> + if (scp_is_single_core(pdev))
> ret = scp_add_single_core(pdev, scp_cluster);
> else
> ret = scp_add_multi_core(pdev, scp_cluster);
> --
> 2.42.0
>
prev parent reply other threads:[~2023-09-21 21:02 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-19 9:23 [PATCH] remoteproc: mediatek: Refactor single core check and fix retrocompatibility AngeloGioacchino Del Regno
2023-09-20 13:28 ` Mathieu Poirier
2023-09-20 15:03 ` Laura Nao
2023-09-21 4:09 ` Chen-Yu Tsai
2023-09-21 7:17 ` AngeloGioacchino Del Regno
2023-09-21 12:51 ` Mathieu Poirier [this message]
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