From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bibby Hsieh Subject: [PATCH v5 10/12] soc: mediatek: cmdq: add cmdq_dev_get_subsys function Date: Tue, 7 May 2019 16:13:53 +0800 Message-ID: <20190507081355.52630-11-bibby.hsieh@mediatek.com> References: <20190507081355.52630-1-bibby.hsieh@mediatek.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20190507081355.52630-1-bibby.hsieh-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+glpam-linux-mediatek=m.gmane.org-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org To: Jassi Brar , Matthias Brugger , Rob Herring , CK HU Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Nicolas Boichat , Philipp Zabel , srv_heupstream-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org, Daoyuan Huang , Sascha Hauer , linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Dennis-YC Hsieh , kendrick.hsu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org, linux-mediatek-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, Houlong Wei , Sascha Hauer , Frederic Chen , Jiaguang Zhang , Bibby Hsieh , linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, ginny.chen-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org List-Id: linux-mediatek@lists.infradead.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 | 25 +++++++++++++++++++++++++ include/linux/soc/mediatek/mtk-cmdq.h | 18 ++++++++++++++++++ 2 files changed, 43 insertions(+) diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c index 716f8c4f207b..00636ec995e8 100644 --- a/drivers/soc/mediatek/mtk-cmdq-helper.c +++ b/drivers/soc/mediatek/mtk-cmdq-helper.c @@ -27,6 +27,31 @@ struct cmdq_instruction { u8 op; }; +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-client-reg", + "#subsys-cells", idx, &spec)) { + dev_err(dev, "can't parse gce-client-reg property"); + + return (struct cmdq_subsys *)-ENODEV; + } + + subsys->id = spec.args[0]; + subsys->offset = spec.args[1]; + subsys->size = spec.args[2]; + 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 0651a0bffa54..574006c5cd76 100644 --- a/include/linux/soc/mediatek/mtk-cmdq.h +++ b/include/linux/soc/mediatek/mtk-cmdq.h @@ -15,6 +15,12 @@ struct cmdq_pkt; +struct cmdq_subsys { + u8 id; + u16 offset; + u16 size; +}; + struct cmdq_client { spinlock_t lock; u32 pkt_cnt; @@ -142,4 +148,16 @@ 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__ */ -- 2.18.0