diff options
Diffstat (limited to 'drivers/spi/spi-ppc4xx.c')
| -rw-r--r-- | drivers/spi/spi-ppc4xx.c | 43 |
1 files changed, 14 insertions, 29 deletions
diff --git a/drivers/spi/spi-ppc4xx.c b/drivers/spi/spi-ppc4xx.c index 98ec53285fc..80b8408ac3e 100644 --- a/drivers/spi/spi-ppc4xx.c +++ b/drivers/spi/spi-ppc4xx.c @@ -24,13 +24,13 @@ */ #include <linux/module.h> -#include <linux/init.h> #include <linux/sched.h> #include <linux/slab.h> #include <linux/errno.h> #include <linux/wait.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> #include <linux/of_platform.h> -#include <linux/of_spi.h> #include <linux/of_gpio.h> #include <linux/interrupt.h> #include <linux/delay.h> @@ -102,7 +102,7 @@ struct spi_ppc4xx_regs { u8 dummy; /* * Clock divisor modulus register - * This uses the follwing formula: + * This uses the following formula: * SCPClkOut = OPBCLK/(4(CDM + 1)) * or * CDM = (OPBCLK/4*SCPClkOut) - 1 @@ -191,18 +191,12 @@ static int spi_ppc4xx_setupxfer(struct spi_device *spi, struct spi_transfer *t) speed = min(t->speed_hz, spi->max_speed_hz); } - if (bits_per_word != 8) { - dev_err(&spi->dev, "invalid bits-per-word (%d)\n", - bits_per_word); - return -EINVAL; - } - if (!speed || (speed > spi->max_speed_hz)) { dev_err(&spi->dev, "invalid speed_hz (%d)\n", speed); return -EINVAL; } - /* Write new configration */ + /* Write new configuration */ out_8(&hw->regs->mode, cs->mode); /* Set the clock */ @@ -230,12 +224,6 @@ static int spi_ppc4xx_setup(struct spi_device *spi) { struct spi_ppc4xx_cs *cs = spi->controller_state; - if (spi->bits_per_word != 8) { - dev_err(&spi->dev, "invalid bits-per-word (%d)\n", - spi->bits_per_word); - return -EINVAL; - } - if (!spi->max_speed_hz) { dev_err(&spi->dev, "invalid max_speed_hz (must be non-zero)\n"); return -EINVAL; @@ -390,7 +378,7 @@ static void free_gpios(struct ppc4xx_spi *hw) /* * platform_device layer stuff... */ -static int __init spi_ppc4xx_of_probe(struct platform_device *op) +static int spi_ppc4xx_of_probe(struct platform_device *op) { struct ppc4xx_spi *hw; struct spi_master *master; @@ -407,9 +395,9 @@ static int __init spi_ppc4xx_of_probe(struct platform_device *op) if (master == NULL) return -ENOMEM; master->dev.of_node = np; - dev_set_drvdata(dev, master); + platform_set_drvdata(op, master); hw = spi_master_get_devdata(master); - hw->master = spi_master_get(master); + hw->master = master; hw->dev = dev; init_completion(&hw->done); @@ -420,7 +408,7 @@ static int __init spi_ppc4xx_of_probe(struct platform_device *op) * This includes both "null" gpio's and real ones. */ num_gpios = of_gpio_count(np); - if (num_gpios) { + if (num_gpios > 0) { int i; hw->gpios = kzalloc(sizeof(int) * num_gpios, GFP_KERNEL); @@ -466,16 +454,14 @@ static int __init spi_ppc4xx_of_probe(struct platform_device *op) bbp->use_dma = 0; bbp->master->setup = spi_ppc4xx_setup; bbp->master->cleanup = spi_ppc4xx_cleanup; - - /* Allocate bus num dynamically. */ - bbp->master->bus_num = -1; + bbp->master->bits_per_word_mask = SPI_BPW_MASK(8); /* the spi->mode bits understood by this driver: */ bbp->master->mode_bits = SPI_CPHA | SPI_CPOL | SPI_CS_HIGH | SPI_LSB_FIRST; /* this many pins in all GPIO controllers */ - bbp->master->num_chipselect = num_gpios; + bbp->master->num_chipselect = num_gpios > 0 ? num_gpios : 0; /* Get the clock for the OPB */ opbnp = of_find_compatible_node(NULL, NULL, "ibm,opb"); @@ -557,24 +543,23 @@ request_mem_error: free_gpios: free_gpios(hw); free_master: - dev_set_drvdata(dev, NULL); spi_master_put(master); dev_err(dev, "initialization failed\n"); return ret; } -static int __exit spi_ppc4xx_of_remove(struct platform_device *op) +static int spi_ppc4xx_of_remove(struct platform_device *op) { - struct spi_master *master = dev_get_drvdata(&op->dev); + struct spi_master *master = platform_get_drvdata(op); struct ppc4xx_spi *hw = spi_master_get_devdata(master); spi_bitbang_stop(&hw->bitbang); - dev_set_drvdata(&op->dev, NULL); release_mem_region(hw->mapbase, hw->mapsize); free_irq(hw->irqnum, hw); iounmap(hw->regs); free_gpios(hw); + spi_master_put(master); return 0; } @@ -587,7 +572,7 @@ MODULE_DEVICE_TABLE(of, spi_ppc4xx_of_match); static struct platform_driver spi_ppc4xx_of_driver = { .probe = spi_ppc4xx_of_probe, - .remove = __exit_p(spi_ppc4xx_of_remove), + .remove = spi_ppc4xx_of_remove, .driver = { .name = DRIVER_NAME, .owner = THIS_MODULE, |