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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@mediatek.com>
Reviewed-by: CK Hu <ck.hu@mediatek.com>
Reviewed-by: Houlong Wei <houlong.wei@mediatek.com>
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
This commit is contained in:
Bibby Hsieh 2019-11-21 09:54:09 +08:00 committed by Matthias Brugger
parent b2ff2356bf
commit d412f18c9b
2 changed files with 50 additions and 0 deletions
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29
drivers/soc/mediatek/mtk-cmdq-helper.c
View File

@ -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);

21
include/linux/soc/mediatek/mtk-cmdq.h
View File

@ -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