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Tue, 16 Apr 2019 17:30:17 +0800 From: Stu Hsieh To: Mauro Carvalho Chehab , Rob Herring , CK Hu Subject: [PATCH v2 03/15] [media] mtk-mipicsi: add pm function Date: Tue, 16 Apr 2019 17:30:03 +0800 Message-ID: <1555407015-18130-4-git-send-email-stu.hsieh@mediatek.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1555407015-18130-1-git-send-email-stu.hsieh@mediatek.com> References: <1555407015-18130-1-git-send-email-stu.hsieh@mediatek.com> MIME-Version: 1.0 X-TM-SNTS-SMTP: 48967CEB63FF91E327FD0A2DCBA22904CA4C750A69FB2313E50D2B42E8D872CA2000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190416_103142_698880_1D21F705 X-CRM114-Status: GOOD ( 18.21 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , devicetree@vger.kernel.org, srv_heupstream@mediatek.com, linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org, Stu Hsieh , Matthias Brugger , linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org This patch add PM function to enable/disable clk and larb. Signed-off-by: Stu Hsieh --- .../media/platform/mtk-mipicsi/mtk_mipicsi.c | 80 +++++++++++++++++++ 1 file changed, 80 insertions(+) diff --git a/drivers/media/platform/mtk-mipicsi/mtk_mipicsi.c b/drivers/media/platform/mtk-mipicsi/mtk_mipicsi.c index e26bebe17fe5..ec4f6b503b32 100644 --- a/drivers/media/platform/mtk-mipicsi/mtk_mipicsi.c +++ b/drivers/media/platform/mtk-mipicsi/mtk_mipicsi.c @@ -464,6 +464,85 @@ static struct soc_camera_host_ops mtk_soc_camera_host_ops = { .set_bus_param = mtk_mipicsi_set_bus_param, }; +static int mtk_mipicsi_pm_suspend(struct device *dev) +{ + struct soc_camera_host *ici = to_soc_camera_host(dev); + struct mtk_mipicsi_dev *mipicsi = NULL; + int ret = 0; + int i = 0; + + mipicsi = container_of(ici, struct mtk_mipicsi_dev, soc_host); + if (mipicsi->soc_host.icd != NULL) { + struct v4l2_subdev *sd = + soc_camera_to_subdev(mipicsi->soc_host.icd); + + ret = v4l2_subdev_call(sd, core, s_power, 0); + if (ret == -ENOIOCTLCMD) + ret = 0; + } + + /* close digtal and analog clock */ + for (i = 0; i < mipicsi->clk_num; ++i) + clk_disable_unprepare(mipicsi->clk[i]); + + if (mipicsi->larb_pdev != NULL) + mtk_smi_larb_put(mipicsi->larb_pdev); + + return ret; +} + +static int mtk_mipicsi_suspend(struct device *dev) +{ + if (pm_runtime_suspended(dev)) + return 0; + + return mtk_mipicsi_pm_suspend(dev); +} + +static int mtk_mipicsi_pm_resume(struct device *dev) +{ + struct soc_camera_host *ici = to_soc_camera_host(dev); + struct mtk_mipicsi_dev *mipicsi = + container_of(ici, struct mtk_mipicsi_dev, soc_host); + int ret = 0; + int i = 0; + + if (mipicsi->soc_host.icd != NULL) { + struct v4l2_subdev *sd = + soc_camera_to_subdev(mipicsi->soc_host.icd); + + ret = v4l2_subdev_call(sd, core, s_power, 1); + if (ret == -ENOIOCTLCMD) + ret = 0; + } + + if (mipicsi->larb_pdev != NULL) { + ret = mtk_smi_larb_get(mipicsi->larb_pdev); + if (ret != 0) + return ret; + } + + /* enable digtal clock */ + for (i = 0; i < mipicsi->clk_num; ++i) + (void)clk_prepare_enable(mipicsi->clk[i]); + + return ret; +} + +static int mtk_mipicsi_resume(struct device *dev) +{ + if (pm_runtime_suspended(dev)) + return 0; + + return mtk_mipicsi_pm_resume(dev); +} + +static const struct dev_pm_ops mtk_mipicsi_pm = { + SET_SYSTEM_SLEEP_PM_OPS(mtk_mipicsi_suspend, mtk_mipicsi_resume) + SET_RUNTIME_PM_OPS(mtk_mipicsi_pm_suspend, + mtk_mipicsi_pm_resume, NULL) +}; + static int seninf_mux_camsv_node_parse(struct mtk_mipicsi_dev *mipicsi, int index) { @@ -756,6 +835,7 @@ static const struct of_device_id mtk_mipicsi_of_match[] = { static struct platform_driver mtk_mipicsi_driver = { .driver = { .name = MTK_MIPICSI_DRV_NAME, + .pm = &mtk_mipicsi_pm, .of_match_table = of_match_ptr(mtk_mipicsi_of_match), }, .probe = mtk_mipicsi_probe, -- 2.18.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel