From: Matthias Brugger <matthias.bgg@gmail.com>
To: Yong Wu <yong.wu@mediatek.com>, Joerg Roedel <joro@8bytes.org>,
Robin Murphy <robin.murphy@arm.com>,
Rob Herring <robh+dt@kernel.org>
Cc: Evan Green <evgreen@chromium.org>, Tomasz Figa <tfiga@google.com>,
Will Deacon <will.deacon@arm.com>,
linux-mediatek@lists.infradead.org, srv_heupstream@mediatek.com,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
iommu@lists.linux-foundation.org, yingjoe.chen@mediatek.com,
youlin.pei@mediatek.com, Nicolas Boichat <drinkcat@chromium.org>,
anan.sun@mediatek.com, Matthias Kaehlcke <mka@chromium.org>
Subject: Re: [PATCH v7 15/21] memory: mtk-smi: Invoke pm runtime_callback to enable clocks
Date: Mon, 17 Jun 2019 18:13:56 +0200 [thread overview]
Message-ID: <719e0d71-a9e1-4cb2-0efb-0cdddc65e036@gmail.com> (raw)
In-Reply-To: <1560169080-27134-16-git-send-email-yong.wu@mediatek.com>
On 10/06/2019 14:17, Yong Wu wrote:
> This patch only move the clk_prepare_enable and config_port into the
> runtime suspend/resume callback. It doesn't change the code content
> and sequence.
>
> This is a preparing patch for adjusting SMI_BUS_SEL for mt8183.
> (SMI_BUS_SEL need to be restored after smi-common resume every time.)
> Also it gives a chance to get rid of mtk_smi_larb_get/put which could
> be a next topic.
>
> CC: Matthias Brugger <matthias.bgg@gmail.com>
> Signed-off-by: Yong Wu <yong.wu@mediatek.com>
> Reviewed-by: Evan Green <evgreen@chromium.org>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
> ---
> drivers/memory/mtk-smi.c | 113 ++++++++++++++++++++++++++++++-----------------
> 1 file changed, 72 insertions(+), 41 deletions(-)
>
> diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c
> index a430721..9790801 100644
> --- a/drivers/memory/mtk-smi.c
> +++ b/drivers/memory/mtk-smi.c
> @@ -86,17 +86,13 @@ struct mtk_smi_larb { /* larb: local arbiter */
> u32 *mmu;
> };
>
> -static int mtk_smi_enable(const struct mtk_smi *smi)
> +static int mtk_smi_clk_enable(const struct mtk_smi *smi)
> {
> int ret;
>
> - ret = pm_runtime_get_sync(smi->dev);
> - if (ret < 0)
> - return ret;
> -
> ret = clk_prepare_enable(smi->clk_apb);
> if (ret)
> - goto err_put_pm;
> + return ret;
>
> ret = clk_prepare_enable(smi->clk_smi);
> if (ret)
> @@ -118,59 +114,28 @@ static int mtk_smi_enable(const struct mtk_smi *smi)
> clk_disable_unprepare(smi->clk_smi);
> err_disable_apb:
> clk_disable_unprepare(smi->clk_apb);
> -err_put_pm:
> - pm_runtime_put_sync(smi->dev);
> return ret;
> }
>
> -static void mtk_smi_disable(const struct mtk_smi *smi)
> +static void mtk_smi_clk_disable(const struct mtk_smi *smi)
> {
> clk_disable_unprepare(smi->clk_gals1);
> clk_disable_unprepare(smi->clk_gals0);
> clk_disable_unprepare(smi->clk_smi);
> clk_disable_unprepare(smi->clk_apb);
> - pm_runtime_put_sync(smi->dev);
> }
>
> int mtk_smi_larb_get(struct device *larbdev)
> {
> - struct mtk_smi_larb *larb = dev_get_drvdata(larbdev);
> - const struct mtk_smi_larb_gen *larb_gen = larb->larb_gen;
> - struct mtk_smi *common = dev_get_drvdata(larb->smi_common_dev);
> - int ret;
> + int ret = pm_runtime_get_sync(larbdev);
>
> - /* Enable the smi-common's power and clocks */
> - ret = mtk_smi_enable(common);
> - if (ret)
> - return ret;
> -
> - /* Enable the larb's power and clocks */
> - ret = mtk_smi_enable(&larb->smi);
> - if (ret) {
> - mtk_smi_disable(common);
> - return ret;
> - }
> -
> - /* Configure the iommu info for this larb */
> - larb_gen->config_port(larbdev);
> -
> - return 0;
> + return (ret < 0) ? ret : 0;
> }
> EXPORT_SYMBOL_GPL(mtk_smi_larb_get);
>
> void mtk_smi_larb_put(struct device *larbdev)
> {
> - struct mtk_smi_larb *larb = dev_get_drvdata(larbdev);
> - struct mtk_smi *common = dev_get_drvdata(larb->smi_common_dev);
> -
> - /*
> - * Don't de-configure the iommu info for this larb since there may be
> - * several modules in this larb.
> - * The iommu info will be reset after power off.
> - */
> -
> - mtk_smi_disable(&larb->smi);
> - mtk_smi_disable(common);
> + pm_runtime_put_sync(larbdev);
> }
> EXPORT_SYMBOL_GPL(mtk_smi_larb_put);
>
> @@ -385,12 +350,52 @@ static int mtk_smi_larb_remove(struct platform_device *pdev)
> return 0;
> }
>
> +static int __maybe_unused mtk_smi_larb_resume(struct device *dev)
> +{
> + struct mtk_smi_larb *larb = dev_get_drvdata(dev);
> + const struct mtk_smi_larb_gen *larb_gen = larb->larb_gen;
> + int ret;
> +
> + /* Power on smi-common. */
> + ret = pm_runtime_get_sync(larb->smi_common_dev);
> + if (ret < 0) {
> + dev_err(dev, "Failed to pm get for smi-common(%d).\n", ret);
> + return ret;
> + }
> +
> + ret = mtk_smi_clk_enable(&larb->smi);
> + if (ret < 0) {
> + dev_err(dev, "Failed to enable clock(%d).\n", ret);
> + pm_runtime_put_sync(larb->smi_common_dev);
> + return ret;
> + }
> +
> + /* Configure the basic setting for this larb */
> + larb_gen->config_port(dev);
> +
> + return 0;
> +}
> +
> +static int __maybe_unused mtk_smi_larb_suspend(struct device *dev)
> +{
> + struct mtk_smi_larb *larb = dev_get_drvdata(dev);
> +
> + mtk_smi_clk_disable(&larb->smi);
> + pm_runtime_put_sync(larb->smi_common_dev);
> + return 0;
> +}
> +
> +static const struct dev_pm_ops smi_larb_pm_ops = {
> + SET_RUNTIME_PM_OPS(mtk_smi_larb_suspend, mtk_smi_larb_resume, NULL)
> +};
> +
> static struct platform_driver mtk_smi_larb_driver = {
> .probe = mtk_smi_larb_probe,
> .remove = mtk_smi_larb_remove,
> .driver = {
> .name = "mtk-smi-larb",
> .of_match_table = mtk_smi_larb_of_ids,
> + .pm = &smi_larb_pm_ops,
> }
> };
>
> @@ -489,12 +494,38 @@ static int mtk_smi_common_remove(struct platform_device *pdev)
> return 0;
> }
>
> +static int __maybe_unused mtk_smi_common_resume(struct device *dev)
> +{
> + struct mtk_smi *common = dev_get_drvdata(dev);
> + int ret;
> +
> + ret = mtk_smi_clk_enable(common);
> + if (ret) {
> + dev_err(common->dev, "Failed to enable clock(%d).\n", ret);
> + return ret;
> + }
> + return 0;
> +}
> +
> +static int __maybe_unused mtk_smi_common_suspend(struct device *dev)
> +{
> + struct mtk_smi *common = dev_get_drvdata(dev);
> +
> + mtk_smi_clk_disable(common);
> + return 0;
> +}
> +
> +static const struct dev_pm_ops smi_common_pm_ops = {
> + SET_RUNTIME_PM_OPS(mtk_smi_common_suspend, mtk_smi_common_resume, NULL)
> +};
> +
> static struct platform_driver mtk_smi_common_driver = {
> .probe = mtk_smi_common_probe,
> .remove = mtk_smi_common_remove,
> .driver = {
> .name = "mtk-smi-common",
> .of_match_table = mtk_smi_common_of_ids,
> + .pm = &smi_common_pm_ops,
> }
> };
>
>
next prev parent reply other threads:[~2019-06-17 16:14 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-10 12:17 [PATCH v7 00/21] MT8183 IOMMU SUPPORT Yong Wu
2019-06-10 12:17 ` [PATCH v7 01/21] dt-bindings: mediatek: Add binding for mt8183 IOMMU and SMI Yong Wu
2019-06-10 12:17 ` [PATCH v7 02/21] iommu/mediatek: Use a struct as the platform data Yong Wu
2019-06-10 12:17 ` [PATCH v7 03/21] memory: mtk-smi: Use a general config_port interface Yong Wu
2019-06-10 12:17 ` [PATCH v7 04/21] memory: mtk-smi: Use a struct for the platform data for smi-common Yong Wu
2019-06-10 12:17 ` [PATCH v7 05/21] iommu/io-pgtable-arm-v7s: Add paddr_to_iopte and iopte_to_paddr helpers Yong Wu
2019-06-10 12:17 ` [PATCH v7 06/21] iommu/io-pgtable-arm-v7s: Extend MediaTek 4GB Mode Yong Wu
2019-06-10 12:17 ` [PATCH v7 07/21] iommu/mediatek: Add bclk can be supported optionally Yong Wu
2019-06-15 19:18 ` Matthias Brugger
2019-06-10 12:17 ` [PATCH v7 08/21] iommu/mediatek: Add larb-id remapped support Yong Wu
2019-06-17 9:25 ` Matthias Brugger
2019-06-10 12:17 ` [PATCH v7 09/21] iommu/mediatek: Refine protect memory definition Yong Wu
2019-06-17 9:59 ` Matthias Brugger
2019-06-10 12:17 ` [PATCH v7 10/21] iommu/mediatek: Move reset_axi into plat_data Yong Wu
2019-06-17 10:19 ` Matthias Brugger
2019-06-10 12:17 ` [PATCH v7 11/21] iommu/mediatek: Move vld_pa_rng " Yong Wu
2019-06-17 10:27 ` Matthias Brugger
2019-06-10 12:17 ` [PATCH v7 12/21] memory: mtk-smi: Add gals support Yong Wu
2019-06-17 15:43 ` Matthias Brugger
2019-06-10 12:17 ` [PATCH v7 13/21] iommu/mediatek: Add mt8183 IOMMU support Yong Wu
2019-06-17 15:51 ` Matthias Brugger
2019-06-10 12:17 ` [PATCH v7 14/21] iommu/mediatek: Add mmu1 support Yong Wu
2019-06-17 15:58 ` Matthias Brugger
2019-06-18 6:19 ` Tomasz Figa
2019-06-18 12:09 ` Yong Wu
2019-06-18 14:05 ` Tomasz Figa
2019-06-10 12:17 ` [PATCH v7 15/21] memory: mtk-smi: Invoke pm runtime_callback to enable clocks Yong Wu
2019-06-17 16:13 ` Matthias Brugger [this message]
2019-06-10 12:17 ` [PATCH v7 16/21] memory: mtk-smi: Add bus_sel for mt8183 Yong Wu
2019-06-13 8:20 ` Pi-Hsun Shih
2019-06-17 16:28 ` Matthias Brugger
2019-06-17 16:23 ` Matthias Brugger
2019-06-18 12:10 ` Yong Wu
2019-06-18 21:07 ` Matthias Brugger
[not found] ` <CANdKZ0d873PJ2u=Hn_aUJBu3dDiNyueVwBv94-VXHGLJBvAbGg@mail.gmail.com>
2019-06-20 9:35 ` Matthias Brugger
2019-06-20 11:38 ` Matthias Brugger
2019-06-21 3:57 ` Pi-Hsun Shih
2019-06-10 12:17 ` [PATCH v7 17/21] memory: mtk-smi: Get rid of need_larbid Yong Wu
2019-06-18 13:45 ` Matthias Brugger
2019-06-20 13:59 ` Yong Wu
2019-06-10 12:17 ` [PATCH v7 18/21] iommu/mediatek: Fix VLD_PA_RNG register backup when suspend Yong Wu
2019-06-17 16:30 ` Matthias Brugger
2019-06-10 12:17 ` [PATCH v7 19/21] iommu/mediatek: Rename enable_4GB to dram_is_4gb Yong Wu
2019-06-18 16:06 ` Matthias Brugger
2019-06-20 13:59 ` Yong Wu
2019-06-21 10:10 ` Matthias Brugger
2019-06-22 2:42 ` Yong Wu
2019-06-10 12:17 ` [PATCH v7 20/21] iommu/mediatek: Fix iova_to_phys PA start for 4GB mode Yong Wu
2019-06-18 16:35 ` Matthias Brugger
2019-06-20 14:00 ` Yong Wu
2019-06-10 12:18 ` [PATCH v7 21/21] iommu/mediatek: Switch to SPDX license identifier Yong Wu
2019-06-17 16:33 ` Matthias Brugger
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