DMA config is incorrect, because of it DMA transfer is never issued and tegra20_fuse_read() always returns 0x0. Signed-off-by: Dmitry Osipenko <digetx@xxxxxxxxx> --- drivers/soc/tegra/fuse/fuse-tegra.c | 1 + drivers/soc/tegra/fuse/fuse-tegra20.c | 3 ++- 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/soc/tegra/fuse/fuse-tegra.c b/drivers/soc/tegra/fuse/fuse-tegra.c index b7c552e3133c..73a3a2c74021 100644 --- a/drivers/soc/tegra/fuse/fuse-tegra.c +++ b/drivers/soc/tegra/fuse/fuse-tegra.c @@ -132,6 +132,7 @@ static int tegra_fuse_probe(struct platform_device *pdev) /* take over the memory region from the early initialization */ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + fuse->phys = res->start; fuse->base = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(fuse->base)) return PTR_ERR(fuse->base); diff --git a/drivers/soc/tegra/fuse/fuse-tegra20.c b/drivers/soc/tegra/fuse/fuse-tegra20.c index 294413a969a0..a33f48c06771 100644 --- a/drivers/soc/tegra/fuse/fuse-tegra20.c +++ b/drivers/soc/tegra/fuse/fuse-tegra20.c @@ -59,7 +59,7 @@ static u32 tegra20_fuse_read(struct tegra_fuse *fuse, unsigned int offset) mutex_lock(&fuse->apbdma.lock); - fuse->apbdma.config.src_addr = fuse->apbdma.phys + FUSE_BEGIN + offset; + fuse->apbdma.config.src_addr = fuse->phys + FUSE_BEGIN + offset; err = dmaengine_slave_config(fuse->apbdma.chan, &fuse->apbdma.config); if (err) @@ -119,6 +119,7 @@ static int tegra20_fuse_probe(struct tegra_fuse *fuse) fuse->apbdma.config.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; fuse->apbdma.config.src_maxburst = 1; fuse->apbdma.config.dst_maxburst = 1; + fuse->apbdma.config.direction = DMA_DEV_TO_MEM; init_completion(&fuse->apbdma.wait); mutex_init(&fuse->apbdma.lock); -- 2.14.1 -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
