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From: Bibby Hsieh <bibby.hsieh@mediatek.com>
To: Jassi Brar <jassisinghbrar@gmail.com>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	Rob Herring <robh+dt@kernel.org>, CK HU <ck.hu@mediatek.com>
Cc: devicetree@vger.kernel.org,
	Nicolas Boichat <drinkcat@chromium.org>,
	Philipp Zabel <p.zabel@pengutronix.de>,
	srv_heupstream@mediatek.com,
	Daoyuan Huang <daoyuan.huang@mediatek.com>,
	Sascha Hauer <s.hauer@pengutronix.de>,
	linux-kernel@vger.kernel.org, Daniel Kurtz <djkurtz@chromium.org>,
	Dennis-YC Hsieh <dennis-yc.hsieh@mediatek.com>,
	linux-mediatek@lists.infradead.org,
	Houlong Wei <houlong.wei@mediatek.com>,
	Sascha Hauer <kernel@pengutronix.de>,
	YT Shen <yt.shen@mediatek.com>,
	Jiaguang Zhang <jiaguang.zhang@mediatek.com>,
	Bibby Hsieh <bibby.hsieh@mediatek.com>,
	linux-arm-kernel@lists.infradead.org, ginny.chen@mediatek.com
Subject: [PATCH v12 11/12] soc: mediatek: cmdq: add cmdq_dev_get_client_reg function
Date: Mon, 19 Aug 2019 10:53:58 +0800
Message-ID: <20190819025359.11381-12-bibby.hsieh@mediatek.com> (raw)
In-Reply-To: <20190819025359.11381-1-bibby.hsieh@mediatek.com>

GCE cannot know the register base address, this function
can help cmdq client to get the cmdq_client_reg structure.

Signed-off-by: Bibby Hsieh <bibby.hsieh@mediatek.com>
---
 drivers/soc/mediatek/mtk-cmdq-helper.c | 29 ++++++++++++++++++++++++++
 include/linux/soc/mediatek/mtk-cmdq.h  | 21 +++++++++++++++++++
 2 files changed, 50 insertions(+)

diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
index 340a92a254e5..1bed07362b7a 100644
--- a/drivers/soc/mediatek/mtk-cmdq-helper.c
+++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
@@ -27,6 +27,35 @@ struct cmdq_instruction {
 	u8 op;
 };
 
+int cmdq_dev_get_client_reg(struct device *dev,
+			    struct cmdq_client_reg *client_reg, int idx)
+{
+	struct of_phandle_args spec;
+	int err;
+
+	if (!client_reg)
+		return -ENOENT;
+
+	err = of_parse_phandle_with_fixed_args(dev->of_node,
+					       "mediatek,gce-client-reg",
+					       3, idx, &spec);
+	if (err < 0) {
+		dev_err(dev,
+			"error %d can't parse gce-client-reg property (%d)",
+			err, idx);
+
+		return err;
+	}
+
+	client_reg->subsys = (u8)spec.args[0];
+	client_reg->offset = (u16)spec.args[1];
+	client_reg->size = (u16)spec.args[2];
+	of_node_put(spec.np);
+
+	return 0;
+}
+EXPORT_SYMBOL(cmdq_dev_get_client_reg);
+
 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 a345870a6d10..6215d4fc4ba3 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_client_reg {
+	u8 subsys;
+	u16 offset;
+	u16 size;
+};
+
 struct cmdq_client {
 	spinlock_t lock;
 	u32 pkt_cnt;
@@ -24,6 +30,21 @@ struct cmdq_client {
 	u32 timeout_ms; /* in unit of microsecond */
 };
 
+/**
+ * cmdq_dev_get_client_reg() - parse cmdq client reg from the device
+ *			       node of CMDQ client
+ * @dev:	device of CMDQ mailbox clienti
+ * @client_reg: CMDQ client reg pointer
+ * @idx:	the index of desired reg
+ *
+ * Return: 0 for success; else the error code is returned
+ *
+ * Help CMDQ client pasing the cmdq client reg
+ * from the device node of CMDQ client.
+ */
+int cmdq_dev_get_client_reg(struct device *dev,
+			    struct cmdq_client_reg *client_reg, int idx);
+
 /**
  * cmdq_mbox_create() - create CMDQ mailbox client and channel
  * @dev:	device of CMDQ mailbox client
-- 
2.18.0


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  parent reply index

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-19  2:53 [PATCH v12 00/12] support gce on mt8183 platform Bibby Hsieh
2019-08-19  2:53 ` [PATCH v12 01/12] dt-binding: gce: remove thread-num property Bibby Hsieh
2019-08-19  2:53 ` [PATCH v12 02/12] dt-binding: gce: add gce header file for mt8183 Bibby Hsieh
2019-08-19  2:53 ` [PATCH v12 03/12] dt-binding: gce: add binding for gce client reg property Bibby Hsieh
2019-08-19  2:53 ` [PATCH v12 04/12] mailbox: mediatek: cmdq: move the CMDQ_IRQ_MASK into cmdq driver data Bibby Hsieh
2019-08-19  2:53 ` [PATCH v12 05/12] mailbox: mediatek: cmdq: support mt8183 gce function Bibby Hsieh
2019-08-19  2:53 ` [PATCH v12 06/12] soc: mediatek: cmdq: clear the event in cmdq initial flow Bibby Hsieh
2019-08-19  2:53 ` [PATCH v12 07/12] soc: mediatek: cmdq: reorder the parameter Bibby Hsieh
2019-08-19  2:53 ` [PATCH v12 08/12] soc: mediatek: cmdq: change the type of input parameter Bibby Hsieh
2019-08-19  2:53 ` [PATCH v12 09/12] soc: mediatek: cmdq: define the instruction struct Bibby Hsieh
2019-08-19 17:00   ` houlong wei
2019-08-19  2:53 ` [PATCH v12 10/12] soc: mediatek: cmdq: add polling function Bibby Hsieh
2019-08-19  2:53 ` Bibby Hsieh [this message]
2019-08-19  3:13   ` [PATCH v12 11/12] soc: mediatek: cmdq: add cmdq_dev_get_client_reg function CK Hu
2019-08-19 17:24   ` houlong wei
2019-08-19  2:53 ` [PATCH v12 12/12] arm64: dts: add gce node for mt8183 Bibby Hsieh

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