On Tue, Aug 18, 2015 at 02:49:15PM +0100, Jon Hunter wrote: > +#define AHUB_TO_MEMORY 2 > +#define MEMORY_TO_AHUB 4 namespace this aptly as well > +static void tegra_adma_stop(struct tegra_dma_channel *tdc) > +{ > + u32 status; > + > + /* TODO: Do we need to disable interrupts here? */ when? > +static void tegra_adma_start(struct tegra_dma_channel *tdc, > + struct tegra_dma_sg_req *sg_req) > +{ > + struct tegra_adma_chan_regs *ch_regs = &sg_req->adma_ch_regs; > + > + /* Update transfer done count for position calculation */ > + tdc->adma_ch_regs.tc = ch_regs->tc; > + tdc_write(tdc, ADMA_CH_TC, ch_regs->tc); > + tdc_write(tdc, ADMA_CH_CTRL, ch_regs->ctrl); > + tdc_write(tdc, ADMA_CH_LOWER_SOURCE_ADDR, ch_regs->src_ptr); > + tdc_write(tdc, ADMA_CH_LOWER_TARGET_ADDR, ch_regs->tgt_ptr); > + tdc_write(tdc, ADMA_CH_AHUB_FIFO_CTRL, ch_regs->ahub_fifo_ctrl); > + tdc_write(tdc, ADMA_CH_CONFIG, ch_regs->config); empty line here please > +static int tegra_adma_get_xfer_params(struct tegra_dma_channel *tdc, > + struct tegra_adma_chan_regs *ch_regs, > + enum dma_transfer_direction direction) > +{ > + u32 burst_size, ctrl, ctrl_mask, slave_id, fifo_mask, fifo_shift; > + > + ch_regs->ahub_fifo_ctrl = tdc_read(tdc, ADMA_CH_AHUB_FIFO_CTRL); > + ch_regs->config = tdc_read(tdc, ADMA_CH_CONFIG); > + ch_regs->ctrl = tdc_read(tdc, ADMA_CH_CTRL); > + slave_id = tdc->dma_sconfig.slave_id; > + > + switch (direction) { > + case DMA_MEM_TO_DEV: > + burst_size = fls(tdc->dma_sconfig.dst_maxburst); > + ctrl_mask = ADMA_CH_CTRL_TX_REQUEST_SELECT_MASK; > + ctrl = MEMORY_TO_AHUB << ADMA_CH_CTRL_TRANSFER_DIRECTION_SHIFT; > + ctrl |= slave_id << ADMA_CH_CTRL_TX_REQUEST_SELECT_SHIFT; > + fifo_mask = ADMA_CH_AHUB_FIFO_CTRL_TX_FIFO_SIZE_MASK; > + fifo_shift = ADMA_CH_AHUB_FIFO_CTRL_TX_FIFO_SIZE_SHIFT; > + break; Empty line here pls > + case DMA_DEV_TO_MEM: > + burst_size = fls(tdc->dma_sconfig.src_maxburst); > + ctrl_mask = ADMA_CH_CTRL_RX_REQUEST_SELECT_MASK; > + ctrl = AHUB_TO_MEMORY << ADMA_CH_CTRL_TRANSFER_DIRECTION_SHIFT; > + ctrl |= slave_id << ADMA_CH_CTRL_RX_REQUEST_SELECT_SHIFT; > + fifo_mask = ADMA_CH_AHUB_FIFO_CTRL_RX_FIFO_SIZE_MASK; > + fifo_shift = ADMA_CH_AHUB_FIFO_CTRL_RX_FIFO_SIZE_SHIFT; > + break; here too... > + default: > + dev_err(tdc2dev(tdc), "Dma direction is not supported\n"); > + return -EINVAL; > + } > + > + if (!burst_size || burst_size > ADMA_BURSTSIZE_16) > + burst_size = ADMA_BURSTSIZE_16; > + > + ch_regs->ahub_fifo_ctrl &= ~fifo_mask; > + ch_regs->ahub_fifo_ctrl |= ADMA_FIFO_DEFAULT_SIZE << fifo_shift; > + ch_regs->config &= ~ADMA_CH_CONFIG_BURST_SIZE_MASK; > + ch_regs->config |= burst_size << ADMA_CH_CONFIG_BURST_SIZE_SHIFT; > + ch_regs->ctrl &= ~(ctrl_mask | ADMA_CH_CTRL_TRANSFER_DIRECTION_MASK); > + ch_regs->ctrl |= ctrl; > + > + return -EINVAL; ?? > +static int tegra_adma_pm_suspend(struct device *dev) > +{ > + struct tegra_dma *tdma = dev_get_drvdata(dev); > + int i; > + int ret; > + > + ret = pm_runtime_get_sync(dev); why is this required :) > +static int tegra_adma_pm_resume(struct device *dev) > +{ > + struct tegra_dma *tdma = dev_get_drvdata(dev); > + int i; > + int ret; > + > + ret = pm_runtime_get_sync(dev); and this -- ~Vinod -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html