diff options
| author | Dennis YC Hsieh <dennis-yc.hsieh@mediatek.com> | 2020-07-07 23:45:09 +0800 |
|---|---|---|
| committer | Matthias Brugger <matthias.bgg@gmail.com> | 2020-09-25 17:27:34 +0200 |
| commit | d3b04aab06fbc33ddea15725f3ff1667c9717929 (patch) | |
| tree | cd9560e836070ade38f6a9b02ec51256aa39e2ea /include/linux/soc/mediatek | |
| parent | 11c7842d41c82eb3551a0606ccba89ac33318b62 (diff) | |
| download | lwn-d3b04aab06fbc33ddea15725f3ff1667c9717929.tar.gz lwn-d3b04aab06fbc33ddea15725f3ff1667c9717929.zip | |
soc: mediatek: cmdq: add read_s function
Add read_s function in cmdq helper functions which support read value from
register or dma physical address into gce internal register.
Signed-off-by: Dennis YC Hsieh <dennis-yc.hsieh@mediatek.com>
Link: https://lore.kernel.org/r/1594136714-11650-5-git-send-email-dennis-yc.hsieh@mediatek.com
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
Diffstat (limited to 'include/linux/soc/mediatek')
| -rw-r--r-- | include/linux/soc/mediatek/mtk-cmdq.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h index 53230341bf94..cd7ec714344e 100644 --- a/include/linux/soc/mediatek/mtk-cmdq.h +++ b/include/linux/soc/mediatek/mtk-cmdq.h @@ -104,6 +104,18 @@ int cmdq_pkt_write(struct cmdq_pkt *pkt, u8 subsys, u16 offset, u32 value); int cmdq_pkt_write_mask(struct cmdq_pkt *pkt, u8 subsys, u16 offset, u32 value, u32 mask); +/* + * cmdq_pkt_read_s() - append read_s command to the CMDQ packet + * @pkt: the CMDQ packet + * @high_addr_reg_idx: internal register ID which contains high address of pa + * @addr_low: low address of pa + * @reg_idx: the CMDQ internal register ID to cache read data + * + * Return: 0 for success; else the error code is returned + */ +int cmdq_pkt_read_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx, u16 addr_low, + u16 reg_idx); + /** * cmdq_pkt_write_s() - append write_s command to the CMDQ packet * @pkt: the CMDQ packet |