diff options
Diffstat (limited to 'drivers/spi/spi-pxa2xx.c')
| -rw-r--r-- | drivers/spi/spi-pxa2xx.c | 57 |
1 files changed, 32 insertions, 25 deletions
diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c index 2eb06ee0b326..7765b1999537 100644 --- a/drivers/spi/spi-pxa2xx.c +++ b/drivers/spi/spi-pxa2xx.c @@ -546,8 +546,17 @@ static irqreturn_t ssp_int(int irq, void *dev_id) if (pm_runtime_suspended(&drv_data->pdev->dev)) return IRQ_NONE; - sccr1_reg = read_SSCR1(reg); + /* + * If the device is not yet in RPM suspended state and we get an + * interrupt that is meant for another device, check if status bits + * are all set to one. That means that the device is already + * powered off. + */ status = read_SSSR(reg); + if (status == ~0) + return IRQ_NONE; + + sccr1_reg = read_SSCR1(reg); /* Ignore possible writes if we don't need to write */ if (!(sccr1_reg & SSCR1_TIE)) @@ -564,8 +573,8 @@ static irqreturn_t ssp_int(int irq, void *dev_id) write_SSTO(0, reg); write_SSSR_CS(drv_data, drv_data->clear_sr); - dev_err(&drv_data->pdev->dev, "bad message state " - "in interrupt handler\n"); + dev_err(&drv_data->pdev->dev, + "bad message state in interrupt handler\n"); /* Never fail */ return IRQ_HANDLED; @@ -642,8 +651,8 @@ static void pump_transfers(unsigned long data) if (message->is_dma_mapped || transfer->rx_dma || transfer->tx_dma) { dev_err(&drv_data->pdev->dev, - "pump_transfers: mapped transfer length " - "of %u is greater than %d\n", + "pump_transfers: mapped transfer length of " + "%u is greater than %d\n", transfer->len, MAX_DMA_LEN); message->status = -EINVAL; giveback(drv_data); @@ -651,11 +660,10 @@ static void pump_transfers(unsigned long data) } /* warn ... we force this to PIO mode */ - if (printk_ratelimit()) - dev_warn(&message->spi->dev, "pump_transfers: " - "DMA disabled for transfer length %ld " - "greater than %d\n", - (long)drv_data->len, MAX_DMA_LEN); + dev_warn_ratelimited(&message->spi->dev, + "pump_transfers: DMA disabled for transfer length %ld " + "greater than %d\n", + (long)drv_data->len, MAX_DMA_LEN); } /* Setup the transfer state based on the type of transfer */ @@ -717,11 +725,8 @@ static void pump_transfers(unsigned long data) message->spi, bits, &dma_burst, &dma_thresh)) - if (printk_ratelimit()) - dev_warn(&message->spi->dev, - "pump_transfers: " - "DMA burst size reduced to " - "match bits_per_word\n"); + dev_warn_ratelimited(&message->spi->dev, + "pump_transfers: DMA burst size reduced to match bits_per_word\n"); } cr0 = clk_div @@ -845,8 +850,8 @@ static int setup_cs(struct spi_device *spi, struct chip_data *chip, if (gpio_is_valid(chip_info->gpio_cs)) { err = gpio_request(chip_info->gpio_cs, "SPI_CS"); if (err) { - dev_err(&spi->dev, "failed to request chip select " - "GPIO%d\n", chip_info->gpio_cs); + dev_err(&spi->dev, "failed to request chip select GPIO%d\n", + chip_info->gpio_cs); return err; } @@ -890,8 +895,8 @@ static int setup(struct spi_device *spi) if (drv_data->ssp_type == CE4100_SSP) { if (spi->chip_select > 4) { - dev_err(&spi->dev, "failed setup: " - "cs number must not be > 4.\n"); + dev_err(&spi->dev, + "failed setup: cs number must not be > 4.\n"); kfree(chip); return -EINVAL; } @@ -947,8 +952,8 @@ static int setup(struct spi_device *spi) spi->bits_per_word, &chip->dma_burst_size, &chip->dma_threshold)) { - dev_warn(&spi->dev, "in setup: DMA burst size reduced " - "to match bits_per_word\n"); + dev_warn(&spi->dev, + "in setup: DMA burst size reduced to match bits_per_word\n"); } } @@ -1068,6 +1073,8 @@ pxa2xx_spi_acpi_get_pdata(struct platform_device *pdev) static struct acpi_device_id pxa2xx_spi_acpi_match[] = { { "INT33C0", 0 }, { "INT33C1", 0 }, + { "INT3430", 0 }, + { "INT3431", 0 }, { "80860F0E", 0 }, { }, }; @@ -1196,7 +1203,7 @@ static int pxa2xx_spi_probe(struct platform_device *pdev) /* Register with the SPI framework */ platform_set_drvdata(pdev, drv_data); - status = spi_register_master(master); + status = devm_spi_register_master(&pdev->dev, master); if (status != 0) { dev_err(&pdev->dev, "problem registering spi master\n"); goto out_error_clock_enabled; @@ -1248,9 +1255,6 @@ static int pxa2xx_spi_remove(struct platform_device *pdev) /* Release SSP */ pxa_ssp_free(ssp); - /* Disconnect from the SPI framework */ - spi_unregister_master(drv_data->master); - return 0; } @@ -1289,6 +1293,9 @@ static int pxa2xx_spi_resume(struct device *dev) /* Enable the SSP clock */ clk_prepare_enable(ssp->clk); + /* Restore LPSS private register bits */ + lpss_ssp_setup(drv_data); + /* Start the queue running */ status = spi_master_resume(drv_data->master); if (status != 0) { |