From: Matthias Brugger <matthias.bgg@gmail.com>
To: Enric Balletbo i Serra <enric.balletbo@collabora.com>,
linux-kernel@vger.kernel.org
Cc: drinkcat@chromium.org, weiyi.lu@mediatek.com,
fparent@baylibre.com, Matthias Brugger <mbrugger@suse.com>,
linux-mediatek@lists.infradead.org, hsinyi@chromium.org,
Collabora Kernel ML <kernel@collabora.com>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2 08/12] soc: mediatek: pm-domains: Add subsystem clocks
Date: Fri, 2 Oct 2020 11:04:49 +0200 [thread overview]
Message-ID: <d6d132ba-1ce1-f537-57ba-4b6bed784b48@gmail.com> (raw)
In-Reply-To: <20201001160154.3587848-9-enric.balletbo@collabora.com>
On 01/10/2020 18:01, Enric Balletbo i Serra wrote:
> From: Matthias Brugger <mbrugger@suse.com>
>
> For the bus protection operations, some subsystem clocks need to be enabled
> before releasing the protection. This patch identifies the subsystem clocks
> by it's name.
>
> Suggested-by: Weiyi Lu <weiyi.lu@mediatek.com>
> [Adapted the patch to the mtk-pm-domains driver]
> Signed-off-by: Matthias Brugger <mbrugger@suse.com>
> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
> ---
>
> Changes in v2:
> - Use dev_err_probe if getting clocks fails, so an error is not printed
> if is deferred.
>
> drivers/soc/mediatek/mtk-pm-domains.c | 89 ++++++++++++++++++++++-----
> 1 file changed, 75 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/soc/mediatek/mtk-pm-domains.c b/drivers/soc/mediatek/mtk-pm-domains.c
> index e0a52d489fea..2075072f16da 100644
> --- a/drivers/soc/mediatek/mtk-pm-domains.c
> +++ b/drivers/soc/mediatek/mtk-pm-domains.c
[...]
>
> + for (i = 0; i < pd->num_subsys_clks; i++) {
> + struct clk *clk = of_clk_get(node, i + clk_ind);
> +
> + if (IS_ERR(clk)) {
> + ret = PTR_ERR(clk);
> + dev_err_probe(scpsys->dev, PTR_ERR(clk),
> + "%pOFn: failed to get clk at index %d: %d\n",
> + node, i + clk_ind, ret);
> + goto err_put_subsys_clocks;
> + }
> +
> + pd->subsys_clks[i].clk = clk;
> + }
> +
> + ret = clk_bulk_prepare(pd->num_subsys_clks, pd->subsys_clks);
> + if (ret)
> + goto err_put_subsys_clocks;
> +
Not sure if it really matters, but logically we should prepare the basic clocks
before we prepare the subsystem clocks. And fix the error handling accordingly.
Regards,
Matthias
> ret = clk_bulk_prepare(pd->num_clks, pd->clks);
> if (ret)
> - goto err_put_clocks;
> + goto err_unprepare_subsys_clocks;
>
> /*
> * Initially turn on all domains to make the domains usable
> @@ -462,6 +513,12 @@ static int scpsys_add_one_domain(struct scpsys *scpsys, struct device_node *node
>
> err_unprepare_clocks:
> clk_bulk_unprepare(pd->num_clks, pd->clks);
> +err_unprepare_subsys_clocks:
> + clk_bulk_unprepare(pd->num_subsys_clks, pd->subsys_clks);
> +err_put_subsys_clocks:
> + clk_bulk_put(pd->num_subsys_clks, pd->subsys_clks);
> + devm_kfree(scpsys->dev, pd->subsys_clks);
> + pd->num_subsys_clks = 0;
> err_put_clocks:
> clk_bulk_put(pd->num_clks, pd->clks);
> devm_kfree(scpsys->dev, pd->clks);
> @@ -541,6 +598,10 @@ static void scpsys_remove_one_domain(struct scpsys_domain *pd)
> clk_bulk_unprepare(pd->num_clks, pd->clks);
> clk_bulk_put(pd->num_clks, pd->clks);
> pd->num_clks = 0;
> +
> + clk_bulk_unprepare(pd->num_subsys_clks, pd->subsys_clks);
> + clk_bulk_put(pd->num_subsys_clks, pd->subsys_clks);
> + pd->num_subsys_clks = 0;
> }
>
> static void scpsys_domain_cleanup(struct scpsys *scpsys)
>
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next prev parent reply other threads:[~2020-10-02 9:06 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-01 16:01 [PATCH v2 00/12] soc: mediatek: pm-domains: Add new driver for SCPSYS power domains controller Enric Balletbo i Serra
2020-10-01 16:01 ` [PATCH v2 01/12] dt-bindings: power: Add bindings for the Mediatek " Enric Balletbo i Serra
2020-10-01 16:01 ` [PATCH v2 02/12] soc: mediatek: Add MediaTek SCPSYS power domains Enric Balletbo i Serra
2020-10-05 1:39 ` Nicolas Boichat
2020-10-26 15:17 ` Enric Balletbo i Serra
2020-10-27 0:19 ` Nicolas Boichat
2020-10-27 16:25 ` Enric Balletbo i Serra
2020-10-28 1:13 ` Nicolas Boichat
2020-10-30 10:29 ` Enric Balletbo i Serra
2020-10-30 12:44 ` Nicolas Boichat
2020-10-01 16:01 ` [PATCH v2 03/12] arm64: dts: mediatek: Add mt8173 power domain controller Enric Balletbo i Serra
2020-10-01 16:01 ` [PATCH v2 04/12] soc: mediatek: pm-domains: Add bus protection protocol Enric Balletbo i Serra
2020-10-01 16:01 ` [PATCH v2 05/12] soc: mediatek: pm_domains: Make bus protection generic Enric Balletbo i Serra
2020-10-01 16:01 ` [PATCH v2 06/12] soc: mediatek: pm-domains: Add SMI block as bus protection block Enric Balletbo i Serra
2020-10-02 8:56 ` Matthias Brugger
2020-10-05 1:48 ` Nicolas Boichat
2020-10-05 10:28 ` Matthias Brugger
2020-10-26 15:18 ` Enric Balletbo i Serra
2020-10-26 15:18 ` Enric Balletbo i Serra
2020-10-01 16:01 ` [PATCH v2 07/12] soc: mediatek: pm-domains: Add extra sram control Enric Balletbo i Serra
2020-10-02 9:24 ` Matthias Brugger
2020-10-01 16:01 ` [PATCH v2 08/12] soc: mediatek: pm-domains: Add subsystem clocks Enric Balletbo i Serra
2020-10-02 9:04 ` Matthias Brugger [this message]
2020-10-26 15:17 ` Enric Balletbo i Serra
2020-10-01 16:01 ` [PATCH v2 09/12] soc: mediatek: pm-domains: Allow bus protection to ignore clear ack Enric Balletbo i Serra
2020-10-01 16:01 ` [PATCH v2 10/12] dt-bindings: power: Add MT8183 power domains Enric Balletbo i Serra
2020-10-01 16:01 ` [PATCH v2 11/12] soc: mediatek: pm-domains: Add support for mt8183 Enric Balletbo i Serra
2020-10-01 16:01 ` [PATCH v2 12/12] arm64: dts: mediatek: Add mt8183 power domains controller Enric Balletbo i Serra
2020-10-02 9:11 ` Matthias Brugger
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