lkml.org 
[lkml]   [2019]   [Jun]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v8 11/12] soc: mediatek: cmdq: add cmdq_dev_get_client_reg function
Date
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 | 24 ++++++++++++++++++++++++
include/linux/soc/mediatek/mtk-cmdq.h | 20 ++++++++++++++++++++
2 files changed, 44 insertions(+)

diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
index 70ad4d806fac..fac4d33fd520 100644
--- a/drivers/soc/mediatek/mtk-cmdq-helper.c
+++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
@@ -27,6 +27,30 @@ 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;
+
+ if (!client_reg)
+ return -EINVAL;
+
+ 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 (%d)", idx);
+
+ return -EINVAL;
+ }
+
+ client_reg->subsys = spec.args[0];
+ client_reg->offset = spec.args[1];
+ client_reg->size = 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..2e2a2274c231 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;
@@ -142,4 +148,18 @@ 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_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);
+
#endif /* __MTK_CMDQ_H__ */
--
2.18.0
\
 
 \ /
  Last update: 2019-06-12 10:55    [W:0.044 / U:3.296 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site