From: Bibby Hsieh <bibby.hsieh@mediatek.com>
To: Matthias Brugger <matthias.bgg@gmail.com>,
Rob Herring <robh+dt@kernel.org>, CK HU <ck.hu@mediatek.com>
Cc: <devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-mediatek@lists.infradead.org>,
<srv_heupstream@mediatek.com>,
Nicolas Boichat <drinkcat@chromium.org>,
Dennis-YC Hsieh <dennis-yc.hsieh@mediatek.com>,
Bibby Hsieh <bibby.hsieh@mediatek.com>
Subject: [PATCH v17 5/6] soc: mediatek: cmdq: add cmdq_dev_get_client_reg function
Date: Thu, 21 Nov 2019 09:54:09 +0800 [thread overview]
Message-ID: <20191121015410.18852-6-bibby.hsieh@mediatek.com> (raw)
In-Reply-To: <20191121015410.18852-1-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>
Reviewed-by: CK Hu <ck.hu@mediatek.com>
Reviewed-by: Houlong Wei <houlong.wei@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 9094fda5a8fe..9add0fd5fa6c 100644
--- a/drivers/soc/mediatek/mtk-cmdq-helper.c
+++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
@@ -28,6 +28,35 @@ 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 92bd5b5c6341..a74c1d5acdf3 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
next prev parent reply other threads:[~2019-11-21 1:54 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-21 1:54 [PATCH v17 0/6] support gce on mt8183 platform Bibby Hsieh
2019-11-21 1:54 ` [PATCH v17 1/6] soc: mediatek: cmdq: fixup wrong input order of write api Bibby Hsieh
2019-11-22 8:05 ` CK Hu
2019-11-21 1:54 ` [PATCH v17 2/6] soc: mediatek: cmdq: remove OR opertaion from err return Bibby Hsieh
2019-12-11 18:26 ` Matthias Brugger
2019-11-21 1:54 ` [PATCH v17 3/6] soc: mediatek: cmdq: define the instruction struct Bibby Hsieh
2019-11-22 8:30 ` CK Hu
2019-12-11 18:39 ` Matthias Brugger
2019-11-21 1:54 ` [PATCH v17 4/6] soc: mediatek: cmdq: add polling function Bibby Hsieh
2019-11-22 8:36 ` CK Hu
2019-12-14 21:45 ` Matthias Brugger
2019-11-21 1:54 ` Bibby Hsieh [this message]
2019-12-14 21:57 ` [PATCH v17 5/6] soc: mediatek: cmdq: add cmdq_dev_get_client_reg function Matthias Brugger
2019-11-21 1:54 ` [PATCH v17 6/6] arm64: dts: add gce node for mt8183 Bibby Hsieh
2019-12-11 18:56 ` Matthias Brugger
2019-12-11 22:09 ` [PATCH v17 0/6] support gce on mt8183 platform Nicolas Boichat
2019-12-12 7:49 ` Matthias Brugger
2019-12-12 9:47 ` Bibby Hsieh
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