diff options
Diffstat (limited to 'drivers/spi/spi.c')
| -rw-r--r-- | drivers/spi/spi.c | 84 |
1 files changed, 76 insertions, 8 deletions
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index a5f53de813d3..11454d5aef95 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -123,6 +123,28 @@ SPI_STATISTICS_SHOW(bytes, "%llu"); SPI_STATISTICS_SHOW(bytes_rx, "%llu"); SPI_STATISTICS_SHOW(bytes_tx, "%llu"); +#define SPI_STATISTICS_TRANSFER_BYTES_HISTO(index, number) \ + SPI_STATISTICS_SHOW_NAME(transfer_bytes_histo##index, \ + "transfer_bytes_histo_" number, \ + transfer_bytes_histo[index], "%lu") +SPI_STATISTICS_TRANSFER_BYTES_HISTO(0, "0-1"); +SPI_STATISTICS_TRANSFER_BYTES_HISTO(1, "2-3"); +SPI_STATISTICS_TRANSFER_BYTES_HISTO(2, "4-7"); +SPI_STATISTICS_TRANSFER_BYTES_HISTO(3, "8-15"); +SPI_STATISTICS_TRANSFER_BYTES_HISTO(4, "16-31"); +SPI_STATISTICS_TRANSFER_BYTES_HISTO(5, "32-63"); +SPI_STATISTICS_TRANSFER_BYTES_HISTO(6, "64-127"); +SPI_STATISTICS_TRANSFER_BYTES_HISTO(7, "128-255"); +SPI_STATISTICS_TRANSFER_BYTES_HISTO(8, "256-511"); +SPI_STATISTICS_TRANSFER_BYTES_HISTO(9, "512-1023"); +SPI_STATISTICS_TRANSFER_BYTES_HISTO(10, "1024-2047"); +SPI_STATISTICS_TRANSFER_BYTES_HISTO(11, "2048-4095"); +SPI_STATISTICS_TRANSFER_BYTES_HISTO(12, "4096-8191"); +SPI_STATISTICS_TRANSFER_BYTES_HISTO(13, "8192-16383"); +SPI_STATISTICS_TRANSFER_BYTES_HISTO(14, "16384-32767"); +SPI_STATISTICS_TRANSFER_BYTES_HISTO(15, "32768-65535"); +SPI_STATISTICS_TRANSFER_BYTES_HISTO(16, "65536+"); + static struct attribute *spi_dev_attrs[] = { &dev_attr_modalias.attr, NULL, @@ -143,6 +165,23 @@ static struct attribute *spi_device_statistics_attrs[] = { &dev_attr_spi_device_bytes.attr, &dev_attr_spi_device_bytes_rx.attr, &dev_attr_spi_device_bytes_tx.attr, + &dev_attr_spi_device_transfer_bytes_histo0.attr, + &dev_attr_spi_device_transfer_bytes_histo1.attr, + &dev_attr_spi_device_transfer_bytes_histo2.attr, + &dev_attr_spi_device_transfer_bytes_histo3.attr, + &dev_attr_spi_device_transfer_bytes_histo4.attr, + &dev_attr_spi_device_transfer_bytes_histo5.attr, + &dev_attr_spi_device_transfer_bytes_histo6.attr, + &dev_attr_spi_device_transfer_bytes_histo7.attr, + &dev_attr_spi_device_transfer_bytes_histo8.attr, + &dev_attr_spi_device_transfer_bytes_histo9.attr, + &dev_attr_spi_device_transfer_bytes_histo10.attr, + &dev_attr_spi_device_transfer_bytes_histo11.attr, + &dev_attr_spi_device_transfer_bytes_histo12.attr, + &dev_attr_spi_device_transfer_bytes_histo13.attr, + &dev_attr_spi_device_transfer_bytes_histo14.attr, + &dev_attr_spi_device_transfer_bytes_histo15.attr, + &dev_attr_spi_device_transfer_bytes_histo16.attr, NULL, }; @@ -168,6 +207,23 @@ static struct attribute *spi_master_statistics_attrs[] = { &dev_attr_spi_master_bytes.attr, &dev_attr_spi_master_bytes_rx.attr, &dev_attr_spi_master_bytes_tx.attr, + &dev_attr_spi_master_transfer_bytes_histo0.attr, + &dev_attr_spi_master_transfer_bytes_histo1.attr, + &dev_attr_spi_master_transfer_bytes_histo2.attr, + &dev_attr_spi_master_transfer_bytes_histo3.attr, + &dev_attr_spi_master_transfer_bytes_histo4.attr, + &dev_attr_spi_master_transfer_bytes_histo5.attr, + &dev_attr_spi_master_transfer_bytes_histo6.attr, + &dev_attr_spi_master_transfer_bytes_histo7.attr, + &dev_attr_spi_master_transfer_bytes_histo8.attr, + &dev_attr_spi_master_transfer_bytes_histo9.attr, + &dev_attr_spi_master_transfer_bytes_histo10.attr, + &dev_attr_spi_master_transfer_bytes_histo11.attr, + &dev_attr_spi_master_transfer_bytes_histo12.attr, + &dev_attr_spi_master_transfer_bytes_histo13.attr, + &dev_attr_spi_master_transfer_bytes_histo14.attr, + &dev_attr_spi_master_transfer_bytes_histo15.attr, + &dev_attr_spi_master_transfer_bytes_histo16.attr, NULL, }; @@ -186,10 +242,15 @@ void spi_statistics_add_transfer_stats(struct spi_statistics *stats, struct spi_master *master) { unsigned long flags; + int l2len = min(fls(xfer->len), SPI_STATISTICS_HISTO_SIZE) - 1; + + if (l2len < 0) + l2len = 0; spin_lock_irqsave(&stats->lock, flags); stats->transfers++; + stats->transfer_bytes_histo[l2len]++; stats->bytes += xfer->len; if ((xfer->tx_buf) && @@ -270,15 +331,24 @@ EXPORT_SYMBOL_GPL(spi_bus_type); static int spi_drv_probe(struct device *dev) { const struct spi_driver *sdrv = to_spi_driver(dev->driver); + struct spi_device *spi = to_spi_device(dev); int ret; ret = of_clk_set_defaults(dev->of_node, false); if (ret) return ret; + if (dev->of_node) { + spi->irq = of_irq_get(dev->of_node, 0); + if (spi->irq == -EPROBE_DEFER) + return -EPROBE_DEFER; + if (spi->irq < 0) + spi->irq = 0; + } + ret = dev_pm_domain_attach(dev, true); if (ret != -EPROBE_DEFER) { - ret = sdrv->probe(to_spi_device(dev)); + ret = sdrv->probe(spi); if (ret) dev_pm_domain_detach(dev, true); } @@ -597,7 +667,7 @@ static void spi_set_cs(struct spi_device *spi, bool enable) if (spi->mode & SPI_CS_HIGH) enable = !enable; - if (spi->cs_gpio >= 0) + if (gpio_is_valid(spi->cs_gpio)) gpio_set_value(spi->cs_gpio, !enable); else if (spi->master->set_cs) spi->master->set_cs(spi, !enable); @@ -1433,9 +1503,6 @@ of_register_spi_device(struct spi_master *master, struct device_node *nc) } spi->max_speed_hz = value; - /* IRQ */ - spi->irq = irq_of_parse_and_map(nc, 0); - /* Store a pointer to the node in the device structure */ of_node_get(nc); spi->dev.of_node = nc; @@ -1949,7 +2016,7 @@ static int __spi_validate_bits_per_word(struct spi_master *master, u8 bits_per_w int spi_setup(struct spi_device *spi) { unsigned bad_bits, ugly_bits; - int status = 0; + int status; /* check mode to prevent that DUAL and QUAD set at the same time */ @@ -1986,8 +2053,9 @@ int spi_setup(struct spi_device *spi) if (!spi->bits_per_word) spi->bits_per_word = 8; - if (__spi_validate_bits_per_word(spi->master, spi->bits_per_word)) - return -EINVAL; + status = __spi_validate_bits_per_word(spi->master, spi->bits_per_word); + if (status) + return status; if (!spi->max_speed_hz) spi->max_speed_hz = spi->master->max_speed_hz; |