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Message-ID: <20190820084932.22282-12-bibby.hsieh@mediatek.com>
Date: Tue, 20 Aug 2019 16:49:31 +0800
From: Bibby Hsieh <bibby.hsieh@...iatek.com>
To: Jassi Brar <jassisinghbrar@...il.com>,
Matthias Brugger <matthias.bgg@...il.com>,
Rob Herring <robh+dt@...nel.org>, CK HU <ck.hu@...iatek.com>
CC: Daniel Kurtz <djkurtz@...omium.org>,
Sascha Hauer <s.hauer@...gutronix.de>,
<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-mediatek@...ts.infradead.org>,
<srv_heupstream@...iatek.com>,
Sascha Hauer <kernel@...gutronix.de>,
Philipp Zabel <p.zabel@...gutronix.de>,
Nicolas Boichat <drinkcat@...omium.org>,
YT Shen <yt.shen@...iatek.com>,
Daoyuan Huang <daoyuan.huang@...iatek.com>,
Jiaguang Zhang <jiaguang.zhang@...iatek.com>,
Dennis-YC Hsieh <dennis-yc.hsieh@...iatek.com>,
Houlong Wei <houlong.wei@...iatek.com>,
<ginny.chen@...iatek.com>, Bibby Hsieh <bibby.hsieh@...iatek.com>
Subject: [RESEND, PATCH v13 11/12] soc: mediatek: cmdq: add cmdq_dev_get_client_reg function
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@...iatek.com>
Reviewed-by: CK Hu <ck.hu@...iatek.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 c53f8476c68d..80f75a1075b4 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..02ddd60b212f 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 client
+ * @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 parsing 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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