diff options
Diffstat (limited to 'drivers/mfd/stm32-timers.c')
| -rw-r--r-- | drivers/mfd/stm32-timers.c | 32 |
1 files changed, 23 insertions, 9 deletions
diff --git a/drivers/mfd/stm32-timers.c b/drivers/mfd/stm32-timers.c index efcd4b980c94..add603359124 100644 --- a/drivers/mfd/stm32-timers.c +++ b/drivers/mfd/stm32-timers.c @@ -167,10 +167,11 @@ static void stm32_timers_get_arr_size(struct stm32_timers *ddata) regmap_write(ddata->regmap, TIM_ARR, 0x0); } -static void stm32_timers_dma_probe(struct device *dev, +static int stm32_timers_dma_probe(struct device *dev, struct stm32_timers *ddata) { int i; + int ret = 0; char name[4]; init_completion(&ddata->dma.completion); @@ -179,14 +180,23 @@ static void stm32_timers_dma_probe(struct device *dev, /* Optional DMA support: get valid DMA channel(s) or NULL */ for (i = STM32_TIMERS_DMA_CH1; i <= STM32_TIMERS_DMA_CH4; i++) { snprintf(name, ARRAY_SIZE(name), "ch%1d", i + 1); - ddata->dma.chans[i] = dma_request_slave_channel(dev, name); + ddata->dma.chans[i] = dma_request_chan(dev, name); } - ddata->dma.chans[STM32_TIMERS_DMA_UP] = - dma_request_slave_channel(dev, "up"); - ddata->dma.chans[STM32_TIMERS_DMA_TRIG] = - dma_request_slave_channel(dev, "trig"); - ddata->dma.chans[STM32_TIMERS_DMA_COM] = - dma_request_slave_channel(dev, "com"); + ddata->dma.chans[STM32_TIMERS_DMA_UP] = dma_request_chan(dev, "up"); + ddata->dma.chans[STM32_TIMERS_DMA_TRIG] = dma_request_chan(dev, "trig"); + ddata->dma.chans[STM32_TIMERS_DMA_COM] = dma_request_chan(dev, "com"); + + for (i = STM32_TIMERS_DMA_CH1; i < STM32_TIMERS_MAX_DMAS; i++) { + if (IS_ERR(ddata->dma.chans[i])) { + /* Save the first error code to return */ + if (PTR_ERR(ddata->dma.chans[i]) != -ENODEV && !ret) + ret = PTR_ERR(ddata->dma.chans[i]); + + ddata->dma.chans[i] = NULL; + } + } + + return ret; } static void stm32_timers_dma_remove(struct device *dev, @@ -230,7 +240,11 @@ static int stm32_timers_probe(struct platform_device *pdev) stm32_timers_get_arr_size(ddata); - stm32_timers_dma_probe(dev, ddata); + ret = stm32_timers_dma_probe(dev, ddata); + if (ret) { + stm32_timers_dma_remove(dev, ddata); + return ret; + } platform_set_drvdata(pdev, ddata); |