static int ezx_pcap_probe(struct spi_device *spi) { struct pcap_platform_data *pdata = dev_get_platdata(&spi->dev); struct pcap_chip *pcap; int i, adc_irq; int ret = -ENODEV; /* platform data is required */ if (!pdata) goto ret; pcap = devm_kzalloc(&spi->dev, sizeof(*pcap), GFP_KERNEL); if (!pcap) { ret = -ENOMEM; goto ret; } mutex_init(&pcap->io_mutex); mutex_init(&pcap->adc_mutex); INIT_WORK(&pcap->isr_work, pcap_isr_work); INIT_WORK(&pcap->msr_work, pcap_msr_work); spi_set_drvdata(spi, pcap); /* setup spi */ spi->bits_per_word = 32; spi->mode = SPI_MODE_0 | (pdata->config & PCAP_CS_AH ? SPI_CS_HIGH : 0); ret = spi_setup(spi); if (ret) goto ret; pcap->spi = spi; /* setup irq */ pcap->irq_base = pdata->irq_base; pcap->workqueue = create_singlethread_workqueue("pcapd"); if (!pcap->workqueue) { ret = -ENOMEM; dev_err(&spi->dev, "can't create pcap thread\n"); goto ret; } /* redirect interrupts to AP, except adcdone2 */ if (!(pdata->config & PCAP_SECOND_PORT)) ezx_pcap_write(pcap, PCAP_REG_INT_SEL, (1 << PCAP_IRQ_ADCDONE2)); /* setup irq chip */ for (i = pcap->irq_base; i < (pcap->irq_base + PCAP_NIRQS); i++) { irq_set_chip_and_handler(i, &pcap_irq_chip, handle_simple_irq); irq_set_chip_data(i, pcap); #ifdef CONFIG_ARM set_irq_flags(i, IRQF_VALID); #else irq_set_noprobe(i); #endif } /* mask/ack all PCAP interrupts */ ezx_pcap_write(pcap, PCAP_REG_MSR, PCAP_MASK_ALL_INTERRUPT); ezx_pcap_write(pcap, PCAP_REG_ISR, PCAP_CLEAR_INTERRUPT_REGISTER); pcap->msr = PCAP_MASK_ALL_INTERRUPT; irq_set_irq_type(spi->irq, IRQ_TYPE_EDGE_RISING); irq_set_handler_data(spi->irq, pcap); irq_set_chained_handler(spi->irq, pcap_irq_handler); irq_set_irq_wake(spi->irq, 1); /* ADC */ adc_irq = pcap_to_irq(pcap, (pdata->config & PCAP_SECOND_PORT) ? PCAP_IRQ_ADCDONE2 : PCAP_IRQ_ADCDONE); ret = devm_request_irq(&spi->dev, adc_irq, pcap_adc_irq, 0, "ADC", pcap); if (ret) goto free_irqchip; /* setup subdevs */ for (i = 0; i < pdata->num_subdevs; i++) { ret = pcap_add_subdev(pcap, &pdata->subdevs[i]); if (ret) goto remove_subdevs; } /* board specific quirks */ if (pdata->init) pdata->init(pcap); return 0; remove_subdevs: device_for_each_child(&spi->dev, NULL, pcap_remove_subdev); free_irqchip: for (i = pcap->irq_base; i < (pcap->irq_base + PCAP_NIRQS); i++) irq_set_chip_and_handler(i, NULL, NULL); /* destroy_workqueue: */ destroy_workqueue(pcap->workqueue); ret: return ret; }
static int __devinit ezx_pcap_probe(struct spi_device *spi) { struct pcap_platform_data *pdata = spi->dev.platform_data; struct pcap_chip *pcap; int i, adc_irq; int ret = -ENODEV; if (!pdata) goto ret; pcap = kzalloc(sizeof(*pcap), GFP_KERNEL); if (!pcap) { ret = -ENOMEM; goto ret; } mutex_init(&pcap->io_mutex); mutex_init(&pcap->adc_mutex); INIT_WORK(&pcap->isr_work, pcap_isr_work); INIT_WORK(&pcap->msr_work, pcap_msr_work); dev_set_drvdata(&spi->dev, pcap); spi->bits_per_word = 32; spi->mode = SPI_MODE_0 | (pdata->config & PCAP_CS_AH ? SPI_CS_HIGH : 0); ret = spi_setup(spi); if (ret) goto free_pcap; pcap->spi = spi; pcap->irq_base = pdata->irq_base; pcap->workqueue = create_singlethread_workqueue("pcapd"); if (!pcap->workqueue) { dev_err(&spi->dev, "cant create pcap thread\n"); goto free_pcap; } if (!(pdata->config & PCAP_SECOND_PORT)) ezx_pcap_write(pcap, PCAP_REG_INT_SEL, (1 << PCAP_IRQ_ADCDONE2)); for (i = pcap->irq_base; i < (pcap->irq_base + PCAP_NIRQS); i++) { set_irq_chip_and_handler(i, &pcap_irq_chip, handle_simple_irq); set_irq_chip_data(i, pcap); #ifdef CONFIG_ARM set_irq_flags(i, IRQF_VALID); #else set_irq_noprobe(i); #endif } ezx_pcap_write(pcap, PCAP_REG_MSR, PCAP_MASK_ALL_INTERRUPT); ezx_pcap_write(pcap, PCAP_REG_ISR, PCAP_CLEAR_INTERRUPT_REGISTER); pcap->msr = PCAP_MASK_ALL_INTERRUPT; set_irq_type(spi->irq, IRQ_TYPE_EDGE_RISING); set_irq_data(spi->irq, pcap); set_irq_chained_handler(spi->irq, pcap_irq_handler); set_irq_wake(spi->irq, 1); adc_irq = pcap_to_irq(pcap, (pdata->config & PCAP_SECOND_PORT) ? PCAP_IRQ_ADCDONE2 : PCAP_IRQ_ADCDONE); ret = request_irq(adc_irq, pcap_adc_irq, 0, "ADC", pcap); if (ret) goto free_irqchip; for (i = 0; i < pdata->num_subdevs; i++) { ret = pcap_add_subdev(pcap, &pdata->subdevs[i]); if (ret) goto remove_subdevs; } if (pdata->init) pdata->init(pcap); return 0; remove_subdevs: device_for_each_child(&spi->dev, NULL, pcap_remove_subdev); free_irq(adc_irq, pcap); free_irqchip: for (i = pcap->irq_base; i < (pcap->irq_base + PCAP_NIRQS); i++) set_irq_chip_and_handler(i, NULL, NULL); destroy_workqueue(pcap->workqueue); free_pcap: kfree(pcap); ret: return ret; }