From 305aebeff8795cbf03b3f117e74bb702c130ae4c Mon Sep 17 00:00:00 2001 From: Gustavo Pimentel Date: Tue, 4 Jun 2019 15:29:24 +0200 Subject: dmaengine: Add Synopsys eDMA IP version 0 debugfs support Add Synopsys eDMA IP version 0 debugfs support to assist any debug in the future. Creates a file system structure composed by folders and files that mimic the IP register map (this files are read only) to ease any debug. To enable this feature is necessary to select DEBUG_FS option on kernel configuration. Small output example: (eDMA IP version 0, unroll, 1 write + 1 read channels) % mount -t debugfs none /sys/kernel/debug/ % tree /sys/kernel/debug/dw-edma-core:0/ dw-edma/ ├── version ├── mode ├── wr_ch_cnt ├── rd_ch_cnt └── registers     ├── ctrl_data_arb_prior     ├── ctrl     ├── write     │   ├── engine_en     │   ├── doorbell     │   ├── ch_arb_weight_low     │   ├── ch_arb_weight_high     │   ├── int_status     │   ├── int_mask     │   ├── int_clear     │   ├── err_status     │   ├── done_imwr_low     │   ├── done_imwr_high     │   ├── abort_imwr_low     │   ├── abort_imwr_high     │   ├── ch01_imwr_data     │   ├── ch23_imwr_data     │   ├── ch45_imwr_data     │   ├── ch67_imwr_data     │   ├── linked_list_err_en     │   ├── engine_chgroup     │   ├── engine_hshake_cnt_low     │   ├── engine_hshake_cnt_high     │   ├── ch0_pwr_en     │   ├── ch1_pwr_en     │   ├── ch2_pwr_en     │   ├── ch3_pwr_en     │   ├── ch4_pwr_en     │   ├── ch5_pwr_en     │   ├── ch6_pwr_en     │   ├── ch7_pwr_en     │   └── channel:0     │       ├── ch_control1     │       ├── ch_control2     │       ├── transfer_size     │       ├── sar_low     │       ├── sar_high     │       ├── dar_high     │       ├── llp_low     │       └── llp_high     └── read         ├── engine_en         ├── doorbell         ├── ch_arb_weight_low         ├── ch_arb_weight_high         ├── int_status         ├── int_mask         ├── int_clear         ├── err_status_low         ├── err_status_high         ├── done_imwr_low         ├── done_imwr_high         ├── abort_imwr_low         ├── abort_imwr_high         ├── ch01_imwr_data         ├── ch23_imwr_data         ├── ch45_imwr_data         ├── ch67_imwr_data         ├── linked_list_err_en         ├── engine_chgroup         ├── engine_hshake_cnt_low         ├── engine_hshake_cnt_high         ├── ch0_pwr_en         ├── ch1_pwr_en         ├── ch2_pwr_en         ├── ch3_pwr_en         ├── ch4_pwr_en         ├── ch5_pwr_en         ├── ch6_pwr_en         ├── ch7_pwr_en         └── channel:0             ├── ch_control1             ├── ch_control2             ├── transfer_size             ├── sar_low             ├── sar_high             ├── dar_high             ├── llp_low             └── llp_high Signed-off-by: Gustavo Pimentel Cc: Vinod Koul Cc: Dan Williams Cc: Andy Shevchenko Cc: Russell King Cc: Joao Pinto Signed-off-by: Vinod Koul --- drivers/dma/dw-edma/dw-edma-v0-core.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/dma/dw-edma/dw-edma-v0-core.c') diff --git a/drivers/dma/dw-edma/dw-edma-v0-core.c b/drivers/dma/dw-edma/dw-edma-v0-core.c index a38c47312dcf..8a3180ed49a6 100644 --- a/drivers/dma/dw-edma/dw-edma-v0-core.c +++ b/drivers/dma/dw-edma/dw-edma-v0-core.c @@ -345,8 +345,10 @@ int dw_edma_v0_core_device_config(struct dw_edma_chan *chan) /* eDMA debugfs callbacks */ void dw_edma_v0_core_debugfs_on(struct dw_edma_chip *chip) { + dw_edma_v0_debugfs_on(chip); } void dw_edma_v0_core_debugfs_off(void) { + dw_edma_v0_debugfs_off(); } -- cgit v1.2.3-55-g7522