From: Yong Wu <yong.wu@mediatek.com>
To: Matthias Brugger <matthias.bgg@gmail.com>,
Joerg Roedel <joro@8bytes.org>, Rob Herring <robh+dt@kernel.org>
Cc: Evan Green <evgreen@chromium.org>,
Robin Murphy <robin.murphy@arm.com>,
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>,
<yong.wu@mediatek.com>, <youlin.pei@mediatek.com>,
Nicolas Boichat <drinkcat@chromium.org>, <anan.sun@mediatek.com>
Subject: [PATCH v2 04/12] memory: mtk-smi: Add device-link between smi-larb and smi-common
Date: Mon, 10 Jun 2019 20:55:05 +0800 [thread overview]
Message-ID: <1560171313-28299-5-git-send-email-yong.wu@mediatek.com> (raw)
In-Reply-To: <1560171313-28299-1-git-send-email-yong.wu@mediatek.com>
Normally, If the smi-larb HW need work, we should enable the smi-common
HW power and clock firstly.
This patch adds device-link between the smi-larb dev and the smi-common
dev. then If pm_runtime_get_sync(smi-larb-dev), the pm_runtime_get_sync
(smi-common-dev) will be called automatically.
CC: Matthias Brugger <matthias.bgg@gmail.com>
Suggested-by: Tomasz Figa <tfiga@chromium.org>
Signed-off-by: Yong Wu <yong.wu@mediatek.com>
---
drivers/memory/mtk-smi.c | 17 ++++++++---------
1 file changed, 8 insertions(+), 9 deletions(-)
diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c
index 9688341..98b1180 100644
--- a/drivers/memory/mtk-smi.c
+++ b/drivers/memory/mtk-smi.c
@@ -271,6 +271,7 @@ static int mtk_smi_larb_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct device_node *smi_node;
struct platform_device *smi_pdev;
+ struct device_link *link;
larb = devm_kzalloc(dev, sizeof(*larb), GFP_KERNEL);
if (!larb)
@@ -310,6 +311,13 @@ static int mtk_smi_larb_probe(struct platform_device *pdev)
if (!platform_get_drvdata(smi_pdev))
return -EPROBE_DEFER;
larb->smi_common_dev = &smi_pdev->dev;
+ link = device_link_add(dev, larb->smi_common_dev,
+ DL_FLAG_PM_RUNTIME |
+ DL_FLAG_AUTOREMOVE_CONSUMER);
+ if (!link) {
+ dev_err(dev, "Unable to link smi-common dev\n");
+ return -ENODEV;
+ }
} else {
dev_err(dev, "Failed to get the smi_common device\n");
return -EINVAL;
@@ -333,17 +341,9 @@ static int __maybe_unused mtk_smi_larb_resume(struct device *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;
}
@@ -358,7 +358,6 @@ 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;
}
--
1.9.1
next prev parent reply other threads:[~2019-06-10 12:56 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-10 12:55 [PATCH v2 00/12] Clean up "mediatek,larb" after adding device_link Yong Wu
2019-06-10 12:55 ` [PATCH v2 01/12] dt-binding: mediatek: Get rid of mediatek,larb for multimedia HW Yong Wu
2019-06-10 12:55 ` [PATCH v2 02/12] iommu/mediatek: Add probe_defer for smi-larb Yong Wu
2019-06-19 13:52 ` Matthias Brugger
2019-06-22 2:42 ` Yong Wu
2019-06-10 12:55 ` [PATCH v2 03/12] iommu/mediatek: Add device_link between the consumer and the larb devices Yong Wu
2019-06-10 12:55 ` Yong Wu [this message]
2019-06-10 12:55 ` [PATCH v2 05/12] media: mtk-jpeg: Get rid of mtk_smi_larb_get/put Yong Wu
2019-06-20 15:20 ` Matthias Brugger
2019-06-22 2:42 ` Yong Wu
2019-06-10 12:55 ` [PATCH v2 06/12] media: mtk-mdp: " Yong Wu
2019-06-10 12:55 ` [PATCH v2 07/12] media: mtk-vcodec: " Yong Wu
2019-06-10 12:55 ` [PATCH v2 08/12] drm/mediatek: " Yong Wu
2019-06-18 6:35 ` CK Hu
2019-06-18 12:14 ` Yong Wu
2019-06-10 12:55 ` [PATCH v2 09/12] memory: mtk-smi: " Yong Wu
2019-06-10 12:55 ` [PATCH v2 10/12] iommu/mediatek: Use builtin_platform_driver Yong Wu
2019-06-10 12:55 ` [PATCH v2 11/12] arm: dts: mediatek: Get rid of mediatek,larb for MM nodes Yong Wu
2019-06-10 12:55 ` [PATCH v2 12/12] arm64: " Yong Wu
2019-07-23 2:31 ` [PATCH v2 00/12] Clean up "mediatek,larb" after adding device_link CK Hu
2019-07-27 7:51 ` Yong Wu
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