[PATCH v10 02/12] dmaengine: qcom: bam_dma: Extend the driver's device match data
From: Bartosz Golaszewski <hidden>
Date: 2025-12-19 10:08:30
Also in:
dmaengine, linux-arm-msm, linux-crypto, linux-doc, lkml
Subsystem:
arm/qualcomm mailing list, dma generic offload engine subsystem, the rest · Maintainers:
Vinod Koul, Linus Torvalds
From: Bartosz Golaszewski <redacted> In preparation for supporting the pipe locking feature flag, extend the amount of information we can carry in device match data: create a separate structure and make the register information one of its fields. This way, in subsequent patches, it will be just a matter of adding a new field to the device data. Reviewed-by: Dmitry Baryshkov <lumag@kernel.org> Signed-off-by: Bartosz Golaszewski <redacted> Signed-off-by: Bartosz Golaszewski <redacted> --- drivers/dma/qcom/bam_dma.c | 28 ++++++++++++++++++++++------ 1 file changed, 22 insertions(+), 6 deletions(-)
diff --git a/drivers/dma/qcom/bam_dma.c b/drivers/dma/qcom/bam_dma.c
index bcd8de9a9a12621a36b49c31bff96f474468be06..6f78e6b1674a0ff3deef4c3d1892a978555b3807 100644
--- a/drivers/dma/qcom/bam_dma.c
+++ b/drivers/dma/qcom/bam_dma.c@@ -112,6 +112,10 @@ struct reg_offset_data { unsigned int pipe_mult, evnt_mult, ee_mult; }; +struct bam_device_data { + const struct reg_offset_data *reg_info; +}; + static const struct reg_offset_data bam_v1_3_reg_info[] = { [BAM_CTRL] = { 0x0F80, 0x00, 0x00, 0x00 }, [BAM_REVISION] = { 0x0F84, 0x00, 0x00, 0x00 },
@@ -141,6 +145,10 @@ static const struct reg_offset_data bam_v1_3_reg_info[] = { [BAM_P_FIFO_SIZES] = { 0x1020, 0x00, 0x40, 0x00 }, }; +static const struct bam_device_data bam_v1_3_data = { + .reg_info = bam_v1_3_reg_info, +}; + static const struct reg_offset_data bam_v1_4_reg_info[] = { [BAM_CTRL] = { 0x0000, 0x00, 0x00, 0x00 }, [BAM_REVISION] = { 0x0004, 0x00, 0x00, 0x00 },
@@ -170,6 +178,10 @@ static const struct reg_offset_data bam_v1_4_reg_info[] = { [BAM_P_FIFO_SIZES] = { 0x1820, 0x00, 0x1000, 0x00 }, }; +static const struct bam_device_data bam_v1_4_data = { + .reg_info = bam_v1_4_reg_info, +}; + static const struct reg_offset_data bam_v1_7_reg_info[] = { [BAM_CTRL] = { 0x00000, 0x00, 0x00, 0x00 }, [BAM_REVISION] = { 0x01000, 0x00, 0x00, 0x00 },
@@ -199,6 +211,10 @@ static const struct reg_offset_data bam_v1_7_reg_info[] = { [BAM_P_FIFO_SIZES] = { 0x13820, 0x00, 0x1000, 0x00 }, }; +static const struct bam_device_data bam_v1_7_data = { + .reg_info = bam_v1_7_reg_info, +}; + /* BAM CTRL */ #define BAM_SW_RST BIT(0) #define BAM_EN BIT(1)
@@ -392,7 +408,7 @@ struct bam_device { bool powered_remotely; u32 active_channels; - const struct reg_offset_data *layout; + const struct bam_device_data *dev_data; struct clk *bamclk; int irq;
@@ -410,7 +426,7 @@ struct bam_device { static inline void __iomem *bam_addr(struct bam_device *bdev, u32 pipe, enum bam_reg reg) { - const struct reg_offset_data r = bdev->layout[reg]; + const struct reg_offset_data r = bdev->dev_data->reg_info[reg]; return bdev->regs + r.base_offset + r.pipe_mult * pipe +
@@ -1211,9 +1227,9 @@ static void bam_channel_init(struct bam_device *bdev, struct bam_chan *bchan, } static const struct of_device_id bam_of_match[] = { - { .compatible = "qcom,bam-v1.3.0", .data = &bam_v1_3_reg_info }, - { .compatible = "qcom,bam-v1.4.0", .data = &bam_v1_4_reg_info }, - { .compatible = "qcom,bam-v1.7.0", .data = &bam_v1_7_reg_info }, + { .compatible = "qcom,bam-v1.3.0", .data = &bam_v1_3_data }, + { .compatible = "qcom,bam-v1.4.0", .data = &bam_v1_4_data }, + { .compatible = "qcom,bam-v1.7.0", .data = &bam_v1_7_data }, {} };
@@ -1237,7 +1253,7 @@ static int bam_dma_probe(struct platform_device *pdev) return -ENODEV; } - bdev->layout = match->data; + bdev->dev_data = match->data; bdev->regs = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(bdev->regs))
--
2.47.3