diff options
author | Lukas Wunner <lukas@wunner.de> | 2019-05-13 16:48:39 +0200 |
---|---|---|
committer | Mark Brown <broonie@kernel.org> | 2019-05-22 13:22:18 +0100 |
commit | 5f336ea53b6b4a6de313aa84e996cd1b6f23cbf0 (patch) | |
tree | 52642487726bed398d5b05096cd1f77def75d042 /drivers/spi | |
parent | 97266c4d05345f9b500d10c3caa1070249e895e7 (diff) | |
download | linux-5f336ea53b6b4a6de313aa84e996cd1b6f23cbf0.tar.gz linux-5f336ea53b6b4a6de313aa84e996cd1b6f23cbf0.tar.bz2 linux-5f336ea53b6b4a6de313aa84e996cd1b6f23cbf0.zip |
spi: bcm2835: Replace spi_master by spi_controller
Commit 8caab75fd2c2 ('spi: Generalize SPI "master" to "controller"')
changed the "spi_master" nomenclature to "spi_controller", necessitating
a conversion of all drivers.
Perform this conversion for the BCM2835 SPI driver.
No functional change intended.
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Cc: Frank Pavlic <f.pavlic@kunbus.de>
Cc: Martin Sperl <kernel@martin.sperl.org>
Cc: Noralf Trønnes <noralf@tronnes.org>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi')
-rw-r--r-- | drivers/spi/spi-bcm2835.c | 191 |
1 files changed, 96 insertions, 95 deletions
diff --git a/drivers/spi/spi-bcm2835.c b/drivers/spi/spi-bcm2835.c index f87a023a445a..1c34a7bcdb7f 100644 --- a/drivers/spi/spi-bcm2835.c +++ b/drivers/spi/spi-bcm2835.c @@ -318,9 +318,9 @@ static inline void bcm2835_wr_fifo_blind(struct bcm2835_spi *bs, int count) } } -static void bcm2835_spi_reset_hw(struct spi_master *master) +static void bcm2835_spi_reset_hw(struct spi_controller *ctlr) { - struct bcm2835_spi *bs = spi_master_get_devdata(master); + struct bcm2835_spi *bs = spi_controller_get_devdata(ctlr); u32 cs = bcm2835_rd(bs, BCM2835_SPI_CS); /* Disable SPI interrupts and transfer */ @@ -339,8 +339,8 @@ static void bcm2835_spi_reset_hw(struct spi_master *master) static irqreturn_t bcm2835_spi_interrupt(int irq, void *dev_id) { - struct spi_master *master = dev_id; - struct bcm2835_spi *bs = spi_master_get_devdata(master); + struct spi_controller *ctlr = dev_id; + struct bcm2835_spi *bs = spi_controller_get_devdata(ctlr); u32 cs = bcm2835_rd(bs, BCM2835_SPI_CS); /* @@ -362,20 +362,20 @@ static irqreturn_t bcm2835_spi_interrupt(int irq, void *dev_id) if (!bs->rx_len) { /* Transfer complete - reset SPI HW */ - bcm2835_spi_reset_hw(master); + bcm2835_spi_reset_hw(ctlr); /* wake up the framework */ - complete(&master->xfer_completion); + complete(&ctlr->xfer_completion); } return IRQ_HANDLED; } -static int bcm2835_spi_transfer_one_irq(struct spi_master *master, +static int bcm2835_spi_transfer_one_irq(struct spi_controller *ctlr, struct spi_device *spi, struct spi_transfer *tfr, u32 cs, bool fifo_empty) { - struct bcm2835_spi *bs = spi_master_get_devdata(master); + struct bcm2835_spi *bs = spi_controller_get_devdata(ctlr); /* update usage statistics */ bs->count_transfer_irq++; @@ -401,7 +401,7 @@ static int bcm2835_spi_transfer_one_irq(struct spi_master *master, /** * bcm2835_spi_transfer_prologue() - transfer first few bytes without DMA - * @master: SPI master + * @ctlr: SPI master controller * @tfr: SPI transfer * @bs: BCM2835 SPI controller * @cs: CS register @@ -445,7 +445,7 @@ static int bcm2835_spi_transfer_one_irq(struct spi_master *master, * be transmitted in 32-bit width to ensure that the following DMA transfer can * pick up the residue in the RX FIFO in ungarbled form. */ -static void bcm2835_spi_transfer_prologue(struct spi_master *master, +static void bcm2835_spi_transfer_prologue(struct spi_controller *ctlr, struct spi_transfer *tfr, struct bcm2835_spi *bs, u32 cs) @@ -486,9 +486,9 @@ static void bcm2835_spi_transfer_prologue(struct spi_master *master, bcm2835_wr_fifo_count(bs, bs->rx_prologue); bcm2835_wait_tx_fifo_empty(bs); bcm2835_rd_fifo_count(bs, bs->rx_prologue); - bcm2835_spi_reset_hw(master); + bcm2835_spi_reset_hw(ctlr); - dma_sync_single_for_device(master->dma_rx->device->dev, + dma_sync_single_for_device(ctlr->dma_rx->device->dev, sg_dma_address(&tfr->rx_sg.sgl[0]), bs->rx_prologue, DMA_FROM_DEVICE); @@ -552,11 +552,11 @@ static void bcm2835_spi_undo_prologue(struct bcm2835_spi *bs) static void bcm2835_spi_dma_done(void *data) { - struct spi_master *master = data; - struct bcm2835_spi *bs = spi_master_get_devdata(master); + struct spi_controller *ctlr = data; + struct bcm2835_spi *bs = spi_controller_get_devdata(ctlr); /* reset fifo and HW */ - bcm2835_spi_reset_hw(master); + bcm2835_spi_reset_hw(ctlr); /* and terminate tx-dma as we do not have an irq for it * because when the rx dma will terminate and this callback @@ -564,15 +564,15 @@ static void bcm2835_spi_dma_done(void *data) * situation otherwise... */ if (cmpxchg(&bs->dma_pending, true, false)) { - dmaengine_terminate_async(master->dma_tx); + dmaengine_terminate_async(ctlr->dma_tx); bcm2835_spi_undo_prologue(bs); } /* and mark as completed */; - complete(&master->xfer_completion); + complete(&ctlr->xfer_completion); } -static int bcm2835_spi_prepare_sg(struct spi_master *master, +static int bcm2835_spi_prepare_sg(struct spi_controller *ctlr, struct spi_transfer *tfr, bool is_tx) { @@ -587,14 +587,14 @@ static int bcm2835_spi_prepare_sg(struct spi_master *master, if (is_tx) { dir = DMA_MEM_TO_DEV; - chan = master->dma_tx; + chan = ctlr->dma_tx; nents = tfr->tx_sg.nents; sgl = tfr->tx_sg.sgl; flags = 0 /* no tx interrupt */; } else { dir = DMA_DEV_TO_MEM; - chan = master->dma_rx; + chan = ctlr->dma_rx; nents = tfr->rx_sg.nents; sgl = tfr->rx_sg.sgl; flags = DMA_PREP_INTERRUPT; @@ -607,7 +607,7 @@ static int bcm2835_spi_prepare_sg(struct spi_master *master, /* set callback for rx */ if (!is_tx) { desc->callback = bcm2835_spi_dma_done; - desc->callback_param = master; + desc->callback_param = ctlr; } /* submit it to DMA-engine */ @@ -616,12 +616,12 @@ static int bcm2835_spi_prepare_sg(struct spi_master *master, return dma_submit_error(cookie); } -static int bcm2835_spi_transfer_one_dma(struct spi_master *master, +static int bcm2835_spi_transfer_one_dma(struct spi_controller *ctlr, struct spi_device *spi, struct spi_transfer *tfr, u32 cs) { - struct bcm2835_spi *bs = spi_master_get_devdata(master); + struct bcm2835_spi *bs = spi_controller_get_devdata(ctlr); int ret; /* update usage statistics */ @@ -631,15 +631,15 @@ static int bcm2835_spi_transfer_one_dma(struct spi_master *master, * Transfer first few bytes without DMA if length of first TX or RX * sglist entry is not a multiple of 4 bytes (hardware limitation). */ - bcm2835_spi_transfer_prologue(master, tfr, bs, cs); + bcm2835_spi_transfer_prologue(ctlr, tfr, bs, cs); /* setup tx-DMA */ - ret = bcm2835_spi_prepare_sg(master, tfr, true); + ret = bcm2835_spi_prepare_sg(ctlr, tfr, true); if (ret) goto err_reset_hw; /* start TX early */ - dma_async_issue_pending(master->dma_tx); + dma_async_issue_pending(ctlr->dma_tx); /* mark as dma pending */ bs->dma_pending = 1; @@ -655,27 +655,27 @@ static int bcm2835_spi_transfer_one_dma(struct spi_master *master, * mapping of the rx buffers still takes place * this saves 10us or more. */ - ret = bcm2835_spi_prepare_sg(master, tfr, false); + ret = bcm2835_spi_prepare_sg(ctlr, tfr, false); if (ret) { /* need to reset on errors */ - dmaengine_terminate_sync(master->dma_tx); + dmaengine_terminate_sync(ctlr->dma_tx); bs->dma_pending = false; goto err_reset_hw; } /* start rx dma late */ - dma_async_issue_pending(master->dma_rx); + dma_async_issue_pending(ctlr->dma_rx); /* wait for wakeup in framework */ return 1; err_reset_hw: - bcm2835_spi_reset_hw(master); + bcm2835_spi_reset_hw(ctlr); bcm2835_spi_undo_prologue(bs); return ret; } -static bool bcm2835_spi_can_dma(struct spi_master *master, +static bool bcm2835_spi_can_dma(struct spi_controller *ctlr, struct spi_device *spi, struct spi_transfer *tfr) { @@ -687,21 +687,21 @@ static bool bcm2835_spi_can_dma(struct spi_master *master, return true; } -static void bcm2835_dma_release(struct spi_master *master) +static void bcm2835_dma_release(struct spi_controller *ctlr) { - if (master->dma_tx) { - dmaengine_terminate_sync(master->dma_tx); - dma_release_channel(master->dma_tx); - master->dma_tx = NULL; + if (ctlr->dma_tx) { + dmaengine_terminate_sync(ctlr->dma_tx); + dma_release_channel(ctlr->dma_tx); + ctlr->dma_tx = NULL; } - if (master->dma_rx) { - dmaengine_terminate_sync(master->dma_rx); - dma_release_channel(master->dma_rx); - master->dma_rx = NULL; + if (ctlr->dma_rx) { + dmaengine_terminate_sync(ctlr->dma_rx); + dma_release_channel(ctlr->dma_rx); + ctlr->dma_rx = NULL; } } -static void bcm2835_dma_init(struct spi_master *master, struct device *dev) +static void bcm2835_dma_init(struct spi_controller *ctlr, struct device *dev) { struct dma_slave_config slave_config; const __be32 *addr; @@ -709,7 +709,7 @@ static void bcm2835_dma_init(struct spi_master *master, struct device *dev) int ret; /* base address in dma-space */ - addr = of_get_address(master->dev.of_node, 0, NULL, NULL); + addr = of_get_address(ctlr->dev.of_node, 0, NULL, NULL); if (!addr) { dev_err(dev, "could not get DMA-register address - not using dma mode\n"); goto err; @@ -717,13 +717,13 @@ static void bcm2835_dma_init(struct spi_master *master, struct device *dev) dma_reg_base = be32_to_cpup(addr); /* get tx/rx dma */ - master->dma_tx = dma_request_slave_channel(dev, "tx"); - if (!master->dma_tx) { + ctlr->dma_tx = dma_request_slave_channel(dev, "tx"); + if (!ctlr->dma_tx) { dev_err(dev, "no tx-dma configuration found - not using dma mode\n"); goto err; } - master->dma_rx = dma_request_slave_channel(dev, "rx"); - if (!master->dma_rx) { + ctlr->dma_rx = dma_request_slave_channel(dev, "rx"); + if (!ctlr->dma_rx) { dev_err(dev, "no rx-dma configuration found - not using dma mode\n"); goto err_release; } @@ -733,7 +733,7 @@ static void bcm2835_dma_init(struct spi_master *master, struct device *dev) slave_config.dst_addr = (u32)(dma_reg_base + BCM2835_SPI_FIFO); slave_config.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; - ret = dmaengine_slave_config(master->dma_tx, &slave_config); + ret = dmaengine_slave_config(ctlr->dma_tx, &slave_config); if (ret) goto err_config; @@ -741,14 +741,14 @@ static void bcm2835_dma_init(struct spi_master *master, struct device *dev) slave_config.src_addr = (u32)(dma_reg_base + BCM2835_SPI_FIFO); slave_config.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; - ret = dmaengine_slave_config(master->dma_rx, &slave_config); + ret = dmaengine_slave_config(ctlr->dma_rx, &slave_config); if (ret) goto err_config; /* all went well, so set can_dma */ - master->can_dma = bcm2835_spi_can_dma; + ctlr->can_dma = bcm2835_spi_can_dma; /* need to do TX AND RX DMA, so we need dummy buffers */ - master->flags = SPI_MASTER_MUST_RX | SPI_MASTER_MUST_TX; + ctlr->flags = SPI_CONTROLLER_MUST_RX | SPI_CONTROLLER_MUST_TX; return; @@ -756,17 +756,17 @@ err_config: dev_err(dev, "issue configuring dma: %d - not using DMA mode\n", ret); err_release: - bcm2835_dma_release(master); + bcm2835_dma_release(ctlr); err: return; } -static int bcm2835_spi_transfer_one_poll(struct spi_master *master, +static int bcm2835_spi_transfer_one_poll(struct spi_controller *ctlr, struct spi_device *spi, struct spi_transfer *tfr, u32 cs) { - struct bcm2835_spi *bs = spi_master_get_devdata(master); + struct bcm2835_spi *bs = spi_controller_get_devdata(ctlr); unsigned long timeout; /* update usage statistics */ @@ -805,22 +805,22 @@ static int bcm2835_spi_transfer_one_poll(struct spi_master *master, /* update usage statistics */ bs->count_transfer_irq_after_polling++; - return bcm2835_spi_transfer_one_irq(master, spi, + return bcm2835_spi_transfer_one_irq(ctlr, spi, tfr, cs, false); } } /* Transfer complete - reset SPI HW */ - bcm2835_spi_reset_hw(master); + bcm2835_spi_reset_hw(ctlr); /* and return without waiting for completion */ return 0; } -static int bcm2835_spi_transfer_one(struct spi_master *master, +static int bcm2835_spi_transfer_one(struct spi_controller *ctlr, struct spi_device *spi, struct spi_transfer *tfr) { - struct bcm2835_spi *bs = spi_master_get_devdata(master); + struct bcm2835_spi *bs = spi_controller_get_devdata(ctlr); unsigned long spi_hz, clk_hz, cdiv, spi_used_hz; unsigned long hz_per_byte, byte_limit; u32 cs = bcm2835_rd(bs, BCM2835_SPI_CS); @@ -874,34 +874,34 @@ static int bcm2835_spi_transfer_one(struct spi_master *master, /* run in polling mode for short transfers */ if (tfr->len < byte_limit) - return bcm2835_spi_transfer_one_poll(master, spi, tfr, cs); + return bcm2835_spi_transfer_one_poll(ctlr, spi, tfr, cs); /* run in dma mode if conditions are right * Note that unlike poll or interrupt mode DMA mode does not have * this 1 idle clock cycle pattern but runs the spi clock without gaps */ - if (master->can_dma && bcm2835_spi_can_dma(master, spi, tfr)) - return bcm2835_spi_transfer_one_dma(master, spi, tfr, cs); + if (ctlr->can_dma && bcm2835_spi_can_dma(ctlr, spi, tfr)) + return bcm2835_spi_transfer_one_dma(ctlr, spi, tfr, cs); /* run in interrupt-mode */ - return bcm2835_spi_transfer_one_irq(master, spi, tfr, cs, true); + return bcm2835_spi_transfer_one_irq(ctlr, spi, tfr, cs, true); } -static int bcm2835_spi_prepare_message(struct spi_master *master, +static int bcm2835_spi_prepare_message(struct spi_controller *ctlr, struct spi_message *msg) { struct spi_device *spi = msg->spi; - struct bcm2835_spi *bs = spi_master_get_devdata(master); + struct bcm2835_spi *bs = spi_controller_get_devdata(ctlr); u32 cs = bcm2835_rd(bs, BCM2835_SPI_CS); int ret; - if (master->can_dma) { + if (ctlr->can_dma) { /* * DMA transfers are limited to 16 bit (0 to 65535 bytes) by * the SPI HW due to DLEN. Split up transfers (32-bit FIFO * aligned) if the limit is exceeded. */ - ret = spi_split_transfers_maxsize(master, msg, 65532, + ret = spi_split_transfers_maxsize(ctlr, msg, 65532, GFP_KERNEL | GFP_DMA); if (ret) return ret; @@ -919,19 +919,19 @@ static int bcm2835_spi_prepare_message(struct spi_master *master, return 0; } -static void bcm2835_spi_handle_err(struct spi_master *master, +static void bcm2835_spi_handle_err(struct spi_controller *ctlr, struct spi_message *msg) { - struct bcm2835_spi *bs = spi_master_get_devdata(master); + struct bcm2835_spi *bs = spi_controller_get_devdata(ctlr); /* if an error occurred and we have an active dma, then terminate */ if (cmpxchg(&bs->dma_pending, true, false)) { - dmaengine_terminate_sync(master->dma_tx); - dmaengine_terminate_sync(master->dma_rx); + dmaengine_terminate_sync(ctlr->dma_tx); + dmaengine_terminate_sync(ctlr->dma_rx); bcm2835_spi_undo_prologue(bs); } /* and reset */ - bcm2835_spi_reset_hw(master); + bcm2835_spi_reset_hw(ctlr); } static int chip_match_name(struct gpio_chip *chip, void *data) @@ -988,67 +988,68 @@ static int bcm2835_spi_setup(struct spi_device *spi) static int bcm2835_spi_probe(struct platform_device *pdev) { - struct spi_master *master; + struct spi_controller *ctlr; struct bcm2835_spi *bs; struct resource *res; int err; - master = spi_alloc_master(&pdev->dev, sizeof(*bs)); - if (!master) + ctlr = spi_alloc_master(&pdev->dev, sizeof(*bs)); + if (!ctlr) return -ENOMEM; - platform_set_drvdata(pdev, master); + platform_set_drvdata(pdev, ctlr); - master->mode_bits = BCM2835_SPI_MODE_BITS; - master->bits_per_word_mask = SPI_BPW_MASK(8); - master->num_chipselect = 3; - master->setup = bcm2835_spi_setup; - master->transfer_one = bcm2835_spi_transfer_one; - master->handle_err = bcm2835_spi_handle_err; - master->prepare_message = bcm2835_spi_prepare_message; - master->dev.of_node = pdev->dev.of_node; + ctlr->mode_bits = BCM2835_SPI_MODE_BITS; + ctlr->bits_per_word_mask = SPI_BPW_MASK(8); + ctlr->num_chipselect = 3; + ctlr->setup = bcm2835_spi_setup; + ctlr->transfer_one = bcm2835_spi_transfer_one; + ctlr->handle_err = bcm2835_spi_handle_err; + ctlr->prepare_message = bcm2835_spi_prepare_message; + ctlr->dev.of_node = pdev->dev.of_node; - bs = spi_master_get_devdata(master); + bs = spi_controller_get_devdata(ctlr); res = platform_get_resource(pdev, IORESOURCE_MEM, 0); bs->regs = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(bs->regs)) { err = PTR_ERR(bs->regs); - goto out_master_put; + goto out_controller_put; } bs->clk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(bs->clk)) { err = PTR_ERR(bs->clk); dev_err(&pdev->dev, "could not get clk: %d\n", err); - goto out_master_put; + goto out_controller_put; } bs->irq = platform_get_irq(pdev, 0); if (bs->irq <= 0) { dev_err(&pdev->dev, "could not get IRQ: %d\n", bs->irq); err = bs->irq ? bs->irq : -ENODEV; - goto out_master_put; + goto out_controller_put; } clk_prepare_enable(bs->clk); - bcm2835_dma_init(master, &pdev->dev); + bcm2835_dma_init(ctlr, &pdev->dev); /* initialise the hardware with the default polarities */ bcm2835_wr(bs, BCM2835_SPI_CS, BCM2835_SPI_CS_CLEAR_RX | BCM2835_SPI_CS_CLEAR_TX); err = devm_request_irq(&pdev->dev, bs->irq, bcm2835_spi_interrupt, 0, - dev_name(&pdev->dev), master); + dev_name(&pdev->dev), ctlr); if (err) { dev_err(&pdev->dev, "could not request IRQ: %d\n", err); goto out_clk_disable; } - err = devm_spi_register_master(&pdev->dev, master); + err = devm_spi_register_controller(&pdev->dev, ctlr); if (err) { - dev_err(&pdev->dev, "could not register SPI master: %d\n", err); + dev_err(&pdev->dev, "could not register SPI controller: %d\n", + err); goto out_clk_disable; } @@ -1058,15 +1059,15 @@ static int bcm2835_spi_probe(struct platform_device *pdev) out_clk_disable: clk_disable_unprepare(bs->clk); -out_master_put: - spi_master_put(master); +out_controller_put: + spi_controller_put(ctlr); return err; } static int bcm2835_spi_remove(struct platform_device *pdev) { - struct spi_master *master = platform_get_drvdata(pdev); - struct bcm2835_spi *bs = spi_master_get_devdata(master); + struct spi_controller *ctlr = platform_get_drvdata(pdev); + struct bcm2835_spi *bs = spi_controller_get_devdata(ctlr); bcm2835_debugfs_remove(bs); @@ -1076,7 +1077,7 @@ static int bcm2835_spi_remove(struct platform_device *pdev) clk_disable_unprepare(bs->clk); - bcm2835_dma_release(master); + bcm2835_dma_release(ctlr); return 0; } |