[PATCH 05/10] soc: mediatek: add subsys-base address transform function
From: Bibby Hsieh <hidden>
Date: 2019-01-29 07:33:16
Also in:
linux-devicetree, linux-mediatek, lkml
Subsystem:
arm/mediatek soc support, the rest · Maintainers:
Matthias Brugger, AngeloGioacchino Del Regno, Linus Torvalds
GCE cannot know the register base address, we store the subsys-base address relationship in the device node, and store the relationship by cmdq_register_device function. When the client pass the base address and offset into GCE API, we will get the subsys ID by this API. Signed-off-by: Bibby Hsieh <redacted> --- drivers/soc/mediatek/mtk-cmdq-helper.c | 17 +++++++++++++++++ include/linux/soc/mediatek/mtk-cmdq.h | 12 ++++++++++++ 2 files changed, 29 insertions(+)
diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
index ff9fef5..6e4b85e 100644
--- a/drivers/soc/mediatek/mtk-cmdq-helper.c
+++ b/drivers/soc/mediatek/mtk-cmdq-helper.c@@ -15,6 +15,23 @@ #define CMDQ_EOC_CMD ((u64)((CMDQ_CODE_EOC << CMDQ_OP_CODE_SHIFT)) \ << 32 | CMDQ_EOC_IRQ_EN) +u8 cmdq_subsys_base_to_id(struct cmdq_base *clt_base, u32 base) +{ + u8 i; + + if (!clt_base) + return -EINVAL; + + base = base & 0xFFFF0000; + for (i = 0; i < clt_base->count; i++) { + if (clt_base->subsys[i].base == base) + return clt_base->subsys[i].id; + } + + return -EINVAL; +} +EXPORT_SYMBOL(cmdq_subsys_base_to_id); + 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 4e88999..0c7a6ee 100644
--- a/include/linux/soc/mediatek/mtk-cmdq.h
+++ b/include/linux/soc/mediatek/mtk-cmdq.h@@ -15,6 +15,16 @@ struct cmdq_pkt; +struct cmdq_subsys { + u32 base; + u8 id; +}; + +struct cmdq_base { + struct cmdq_subsys subsys[32]; + u8 count; +}; + struct cmdq_client { spinlock_t lock; u32 pkt_cnt;
@@ -127,4 +137,6 @@ int cmdq_pkt_flush_async(struct cmdq_pkt *pkt, cmdq_async_flush_cb cb, */ int cmdq_pkt_flush(struct cmdq_pkt *pkt); +u8 cmdq_subsys_base_to_id(struct cmdq_base *clt_base, u32 base); + #endif /* __MTK_CMDQ_H__ */
--
1.9.1
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