diff options
| -rw-r--r-- | arch/arm/plat-omap/mcbsp.c | 48 |
1 files changed, 25 insertions, 23 deletions
diff --git a/arch/arm/plat-omap/mcbsp.c b/arch/arm/plat-omap/mcbsp.c index b63a7209b41c..ee60ab68251d 100644 --- a/arch/arm/plat-omap/mcbsp.c +++ b/arch/arm/plat-omap/mcbsp.c @@ -1161,25 +1161,31 @@ static DEVICE_ATTR(prop, 0644, prop##_show, prop##_store); THRESHOLD_PROP_BUILDER(max_tx_thres); THRESHOLD_PROP_BUILDER(max_rx_thres); +static const char *dma_op_modes[] = { + "element", "threshold", "frame", +}; + static ssize_t dma_op_mode_show(struct device *dev, struct device_attribute *attr, char *buf) { struct omap_mcbsp *mcbsp = dev_get_drvdata(dev); - int dma_op_mode; + int dma_op_mode, i = 0; + ssize_t len = 0; + const char * const *s; spin_lock_irq(&mcbsp->lock); dma_op_mode = mcbsp->dma_op_mode; spin_unlock_irq(&mcbsp->lock); - return sprintf(buf, "current mode: %d\n" - "possible mode values are:\n" - "%d - %s\n" - "%d - %s\n" - "%d - %s\n", - dma_op_mode, - MCBSP_DMA_MODE_ELEMENT, "element mode", - MCBSP_DMA_MODE_THRESHOLD, "threshold mode", - MCBSP_DMA_MODE_FRAME, "frame mode"); + for (s = &dma_op_modes[i]; i < ARRAY_SIZE(dma_op_modes); s++, i++) { + if (dma_op_mode == i) + len += sprintf(buf + len, "[%s] ", *s); + else + len += sprintf(buf + len, "%s ", *s); + } + len += sprintf(buf + len, "\n"); + + return len; } static ssize_t dma_op_mode_store(struct device *dev, @@ -1187,26 +1193,22 @@ static ssize_t dma_op_mode_store(struct device *dev, const char *buf, size_t size) { struct omap_mcbsp *mcbsp = dev_get_drvdata(dev); - unsigned long val; - int status; + const char * const *s; + int i = 0; - status = strict_strtoul(buf, 0, &val); - if (status) - return status; + for (s = &dma_op_modes[i]; i < ARRAY_SIZE(dma_op_modes); s++, i++) + if (sysfs_streq(buf, *s)) + break; - spin_lock_irq(&mcbsp->lock); + if (i == ARRAY_SIZE(dma_op_modes)) + return -EINVAL; + spin_lock_irq(&mcbsp->lock); if (!mcbsp->free) { size = -EBUSY; goto unlock; } - - if (val > MCBSP_DMA_MODE_FRAME || val < MCBSP_DMA_MODE_ELEMENT) { - size = -EINVAL; - goto unlock; - } - - mcbsp->dma_op_mode = val; + mcbsp->dma_op_mode = i; unlock: spin_unlock_irq(&mcbsp->lock); |