[PATCH v8 09/23] soc: mediatek: Support reset bit mapping in mmsys driver

Hsiao Chien Sung
2023-10-16T10:40:59Z

- Reset ID must starts from 0 and be consecutive, but
the reset bits in our hardware design is not continuous,
some bits are left unused, we need a map to solve the problem
- Use old style 1-to-1 mapping if .rst_tb is not defined

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Hsiao Chien Sung <shawn.sung@mediatek.com>
---
drivers/soc/mediatek/mtk-mmsys.c | 9 +++++++++
drivers/soc/mediatek/mtk-mmsys.h | 3 +++
2 files changed, 12 insertions(+)

diff --git a/drivers/soc/mediatek/mtk-mmsys.c b/drivers/soc/mediatek/mtk-mmsys.c
index b1db09e19905..3a7108eefe9d 100644
--- a/drivers/soc/mediatek/mtk-mmsys.c
+++ b/drivers/soc/mediatek/mtk-mmsys.c
@@ -314,6 +314,15 @@ static int mtk_mmsys_reset_update(struct reset_controller_dev *rcdev, unsigned l
u32 offset;
u32 reg;

+ if (mmsys->data->rst_tb) {
+ if (id >= mmsys->data->num_resets) {
+ dev_err(rcdev->dev, "Invalid reset ID: %lu (>=%u)\n",
+ id, mmsys->data->num_resets);
+ return -EINVAL;
+ }
+ id = mmsys->data->rst_tb[id];
+ }
+
offset = (id / MMSYS_SW_RESET_PER_REG) * sizeof(u32);
id = id % MMSYS_SW_RESET_PER_REG;
reg = mmsys->data->sw0_rst_offset + offset;
diff --git a/drivers/soc/mediatek/mtk-mmsys.h b/drivers/soc/mediatek/mtk-mmsys.h
index 49851bc7aa9e..c90419c96a7d 100644
--- a/drivers/soc/mediatek/mtk-mmsys.h
+++ b/drivers/soc/mediatek/mtk-mmsys.h
@@ -78,6 +78,8 @@
#define DSI_SEL_IN_RDMA 0x1
#define DSI_SEL_IN_MASK 0x1

+#define MMSYS_RST_NR(bank, bit) (((bank) * 32) + (bit))
+
struct mtk_mmsys_routes {
u32 from_comp;
u32 to_comp;
@@ -119,6 +121,7 @@ struct mtk_mmsys_driver_data {
const struct mtk_mmsys_routes *routes;
const unsigned int num_routes;
const u16 sw0_rst_offset;
+ const u8 *rst_tb;
const u32 num_resets;
const bool is_vppsys;
const u8 vsync_len;
--
2.18.0