From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bibby Hsieh Subject: [PATCH v2 09/10] soc: mediatek: cmdq: add cmdq_dev_get_subsys function Date: Wed, 6 Mar 2019 17:50:34 +0800 Message-ID: <1551865835-50974-10-git-send-email-bibby.hsieh@mediatek.com> References: <1551865835-50974-1-git-send-email-bibby.hsieh@mediatek.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1551865835-50974-1-git-send-email-bibby.hsieh@mediatek.com> Sender: linux-kernel-owner@vger.kernel.org To: Jassi Brar , Matthias Brugger , Rob Herring , CK HU Cc: Daniel Kurtz , Sascha Hauer , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, srv_heupstream@mediatek.com, Sascha Hauer , Philipp Zabel , Nicolas Boichat , Bibby Hsieh , YT Shen , Daoyuan Huang , Jiaguang Zhang , Dennis-YC Hsieh , Houlong Wei , ginny.chen@mediatek.com, kendrick.hsu@mediatek.com, Frederic Chen List-Id: devicetree@vger.kernel.org GCE cannot know the register base address, this function can help cmdq client to get the relationship of subsys and register base address. Signed-off-by: Bibby Hsieh --- drivers/soc/mediatek/mtk-cmdq-helper.c | 24 ++++++++++++++++++++++++ include/linux/soc/mediatek/mtk-cmdq.h | 17 +++++++++++++++++ 2 files changed, 41 insertions(+) diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c index 71c167c..0a9609e 100644 --- a/drivers/soc/mediatek/mtk-cmdq-helper.c +++ b/drivers/soc/mediatek/mtk-cmdq-helper.c @@ -47,6 +47,30 @@ static void cmdq_pkt_instr_encoder(struct cmdq_pkt *pkt, s16 arg_c, s16 arg_b, pkt->cmd_buf_size += CMDQ_INST_SIZE; } +struct cmdq_subsys *cmdq_dev_get_subsys(struct device *dev, int idx) +{ + struct cmdq_subsys *subsys; + struct of_phandle_args spec; + + subsys = devm_kzalloc(dev, sizeof(*subsys), GFP_KERNEL); + if (!subsys) + return NULL; + + if (of_parse_phandle_with_args(dev->of_node, "mediatek,gce-subsys", + "#subsys-cells", idx, &spec)) { + dev_err(dev, "can't parse gce-subsys property"); + + return -ENODEV; + } + + subsys->base = spec.args[0]; + subsys->id = spec.args[1]; + of_node_put(spec.np); + + return subsys; +} +EXPORT_SYMBOL(cmdq_dev_get_subsys); + static void cmdq_client_timeout(struct timer_list *t) { struct cmdq_client *client = from_timer(client, t, timer); diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h index 0651a0b..e39ba1e 100644 --- a/include/linux/soc/mediatek/mtk-cmdq.h +++ b/include/linux/soc/mediatek/mtk-cmdq.h @@ -15,6 +15,11 @@ struct cmdq_pkt; +struct cmdq_subsys { + u32 base; + u8 id; +}; + struct cmdq_client { spinlock_t lock; u32 pkt_cnt; @@ -142,4 +147,16 @@ int cmdq_pkt_flush_async(struct cmdq_pkt *pkt, cmdq_async_flush_cb cb, */ int cmdq_pkt_flush(struct cmdq_pkt *pkt); +/** + * cmdq_dev_get_subsys() - parse sub system from the device node of CMDQ client + * @dev: device of CMDQ mailbox client + * @idx: the index of desired subsys + * + * Return: CMDQ subsys pointer + * + * Help CMDQ client pasing the sub system number + * from the device node of CMDQ client. + */ +struct cmdq_subsys *cmdq_dev_get_subsys(struct device *dev, int idx); + #endif /* __MTK_CMDQ_H__ */ -- 1.9.1