/* * Copyright 2009-2010 Pengutronix * Uwe Kleine-Koenig * * loosely based on an earlier driver that has * Copyright 2009 Pengutronix, Sascha Hauer * * This program is free software; you can redistribute it and/or modify it under * the terms of the GNU General Public License version 2 as published by the * Free Software Foundation. */ #include #include #include #include #include #include #include #include struct mc13xxx { struct spi_device *spidev; struct mutex lock; int irq; irq_handler_t irqhandler[MC13XXX_NUM_IRQ]; void *irqdata[MC13XXX_NUM_IRQ]; int adcflags; }; #define MC13XXX_IRQSTAT0 0 #define MC13XXX_IRQSTAT0_ADCDONEI (1 << 0) #define MC13XXX_IRQSTAT0_ADCBISDONEI (1 << 1) #define MC13XXX_IRQSTAT0_TSI (1 << 2) #define MC13783_IRQSTAT0_WHIGHI (1 << 3) #define MC13783_IRQSTAT0_WLOWI (1 << 4) #define MC13XXX_IRQSTAT0_CHGDETI (1 << 6) #define MC13783_IRQSTAT0_CHGOVI (1 << 7) #define MC13XXX_IRQSTAT0_CHGREVI (1 << 8) #define MC13XXX_IRQSTAT0_CHGSHORTI (1 << 9) #define MC13XXX_IRQSTAT0_CCCVI (1 << 10) #define MC13XXX_IRQSTAT0_CHGCURRI (1 << 11) #define MC13XXX_IRQSTAT0_BPONI (1 << 12) #define MC13XXX_IRQSTAT0_LOBATLI (1 << 13) #define MC13XXX_IRQSTAT0_LOBATHI (1 << 14) #define MC13783_IRQSTAT0_UDPI (1 << 15) #define MC13783_IRQSTAT0_USBI (1 << 16) #define MC13783_IRQSTAT0_IDI (1 << 19) #define MC13783_IRQSTAT0_SE1I (1 << 21) #define MC13783_IRQSTAT0_CKDETI (1 << 22) #define MC13783_IRQSTAT0_UDMI (1 << 23) #define MC13XXX_IRQMASK0 1 #define MC13XXX_IRQMASK0_ADCDONEM MC13XXX_IRQSTAT0_ADCDONEI #define MC13XXX_IRQMASK0_ADCBISDONEM MC13XXX_IRQSTAT0_ADCBISDONEI #define MC13XXX_IRQMASK0_TSM MC13XXX_IRQSTAT0_TSI #define MC13783_IRQMASK0_WHIGHM MC13783_IRQSTAT0_WHIGHI #define MC13783_IRQMASK0_WLOWM MC13783_IRQSTAT0_WLOWI #define MC13XXX_IRQMASK0_CHGDETM MC13XXX_IRQSTAT0_CHGDETI #define MC13783_IRQMASK0_CHGOVM MC13783_IRQSTAT0_CHGOVI #define MC13XXX_IRQMASK0_CHGREVM MC13XXX_IRQSTAT0_CHGREVI #define MC13XXX_IRQMASK0_CHGSHORTM MC13XXX_IRQSTAT0_CHGSHORTI #define MC13XXX_IRQMASK0_CCCVM MC13XXX_IRQSTAT0_CCCVI #define MC13XXX_IRQMASK0_CHGCURRM MC13XXX_IRQSTAT0_CHGCURRI #define MC13XXX_IRQMASK0_BPONM MC13XXX_IRQSTAT0_BPONI #define MC13XXX_IRQMASK0_LOBATLM MC13XXX_IRQSTAT0_LOBATLI #define MC13XXX_IRQMASK0_LOBATHM MC13XXX_IRQSTAT0_LOBATHI #define MC13783_IRQMASK0_UDPM MC13783_IRQSTAT0_UDPI #define MC13783_IRQMASK0_USBM MC13783_IRQSTAT0_USBI #define MC13783_IRQMASK0_IDM MC13783_IRQSTAT0_IDI #define MC13783_IRQMASK0_SE1M MC13783_IRQSTAT0_SE1I #define MC13783_IRQMASK0_CKDETM MC13783_IRQSTAT0_CKDETI #define MC13783_IRQMASK0_UDMM MC13783_IRQSTAT0_UDMI #define MC13XXX_IRQSTAT1 3 #define MC13XXX_IRQSTAT1_1HZI (1 << 0) #define MC13XXX_IRQSTAT1_TODAI (1 << 1) #define MC13783_IRQSTAT1_ONOFD1I (1 << 3) #define MC13783_IRQSTAT1_ONOFD2I (1 << 4) #define MC13783_IRQSTAT1_ONOFD3I (1 << 5) #define MC13XXX_IRQSTAT1_SYSRSTI (1 << 6) #define MC13XXX_IRQSTAT1_RTCRSTI (1 << 7) #define MC13XXX_IRQSTAT1_PCI (1 << 8) #define MC13XXX_IRQSTAT1_WARMI (1 << 9) #define MC13XXX_IRQSTAT1_MEMHLDI (1 << 10) #define MC13783_IRQSTAT1_PWRRDYI (1 << 11) #define MC13XXX_IRQSTAT1_THWARNLI (1 << 12) #define MC13XXX_IRQSTAT1_THWARNHI (1 << 13) #define MC13XXX_IRQSTAT1_CLKI (1 << 14) #define MC13783_IRQSTAT1_SEMAFI (1 << 15) #define MC13783_IRQSTAT1_MC2BI (1 << 17) #define MC13783_IRQSTAT1_HSDETI (1 << 18) #define MC13783_IRQSTAT1_HSLI (1 << 19) #define MC13783_IRQSTAT1_ALSPTHI (1 << 20) #define MC13783_IRQSTAT1_AHSSHORTI (1 << 21) #define MC13XXX_IRQMASK1 4 #define MC13XXX_IRQMASK1_1HZM MC13XXX_IRQSTAT1_1HZI #define MC13XXX_IRQMASK1_TODAM MC13XXX_IRQSTAT1_TODAI #define MC13783_IRQMASK1_ONOFD1M MC13783_IRQSTAT1_ONOFD1I #define MC13783_IRQMASK1_ONOFD2M MC13783_IRQSTAT1_ONOFD2I #define MC13783_IRQMASK1_ONOFD3M MC13783_IRQSTAT1_ONOFD3I #define MC13XXX_IRQMASK1_SYSRSTM MC13XXX_IRQSTAT1_SYSRSTI #define MC13XXX_IRQMASK1_RTCRSTM MC13XXX_IRQSTAT1_RTCRSTI #define MC13XXX_IRQMASK1_PCM MC13XXX_IRQSTAT1_PCI #define MC13XXX_IRQMASK1_WARMM MC13XXX_IRQSTAT1_WARMI #define MC13XXX_IRQMASK1_MEMHLDM MC13XXX_IRQSTAT1_MEMHLDI #define MC13783_IRQMASK1_PWRRDYM MC13783_IRQSTAT1_PWRRDYI #define MC13XXX_IRQMASK1_THWARNLM MC13XXX_IRQSTAT1_THWARNLI #define MC13XXX_IRQMASK1_THWARNHM MC13XXX_IRQSTAT1_THWARNHI #define MC13XXX_IRQMASK1_CLKM MC13XXX_IRQSTAT1_CLKI #define MC13783_IRQMASK1_SEMAFM MC13783_IRQSTAT1_SEMAFI #define MC13783_IRQMASK1_MC2BM MC13783_IRQSTAT1_MC2BI #define MC13783_IRQMASK1_HSDETM MC13783_IRQSTAT1_HSDETI #define MC13783_IRQMASK1_HSLM MC13783_IRQSTAT1_HSLI #define MC13783_IRQMASK1_ALSPTHM MC13783_IRQSTAT1_ALSPTHI #define MC13783_IRQMASK1_AHSSHORTM MC13783_IRQSTAT1_AHSSHORTI #define MC13XXX_REVISION 7 #define MC13XXX_REVISION_REVMETAL (0x07 << 0) #define MC13XXX_REVISION_REVFULL (0x03 << 3) #define MC13XXX_REVISION_ICID (0x07 << 6) #define MC13XXX_REVISION_FIN (0x03 << 9) #define MC13XXX_REVISION_FAB (0x03 << 11) #define MC13XXX_REVISION_ICIDCODE (0x3f << 13) #define MC13XXX_ADC1 44 #define MC13XXX_ADC1_ADEN (1 << 0) #define MC13XXX_ADC1_RAND (1 << 1) #define MC13XXX_ADC1_ADSEL (1 << 3) #define MC13XXX_ADC1_ASC (1 << 20) #define MC13XXX_ADC1_ADTRIGIGN (1 << 21) #define MC13XXX_ADC2 45 #define MC13XXX_NUMREGS 0x3f void mc13xxx_lock(struct mc13xxx *mc13xxx) { if (!mutex_trylock(&mc13xxx->lock)) { dev_dbg(&mc13xxx->spidev->dev, "wait for %s from %pf\n", __func__, __builtin_return_address(0)); mutex_lock(&mc13xxx->lock); } dev_dbg(&mc13xxx->spidev->dev, "%s from %pf\n", __func__, __builtin_return_address(0)); } EXPORT_SYMBOL(mc13xxx_lock); void mc13xxx_unlock(struct mc13xxx *mc13xxx) { dev_dbg(&mc13xxx->spidev->dev, "%s from %pf\n", __func__, __builtin_return_address(0)); mutex_unlock(&mc13xxx->lock); } EXPORT_SYMBOL(mc13xxx_unlock); #define MC13XXX_REGOFFSET_SHIFT 25 int mc13xxx_reg_read(struct mc13xxx *mc13xxx, unsigned int offset, u32 *val) { struct spi_transfer t; struct spi_message m; int ret; BUG_ON(!mutex_is_locked(&mc13xxx->lock)); if (offset > MC13XXX_NUMREGS) return -EINVAL; *val = offset << MC13XXX_REGOFFSET_SHIFT; memset(&t, 0, sizeof(t)); t.tx_buf = val; t.rx_buf = val; t.len = sizeof(u32); spi_message_init(&m); spi_message_add_tail(&t, &m); ret = spi_sync(mc13xxx->spidev, &m); /* error in message.status implies error return from spi_sync */ BUG_ON(!ret && m.status); if (ret) return ret; *val &= 0xffffff; dev_vdbg(&mc13xxx->spidev->dev, "[0x%02x] -> 0x%06x\n", offset, *val); return 0; } EXPORT_SYMBOL(mc13xxx_reg_read); int mc13xxx_reg_write(struct mc13xxx *mc13xxx, unsigned int offset, u32 val) { u32 buf; struct spi_transfer t; struct spi_message m; int ret; BUG_ON(!mutex_is_locked(&mc13xxx->lock)); dev_vdbg(&mc13xxx->spidev->dev, "[0x%02x] <- 0x%06x\n", offset, val); if (offset > MC13XXX_NUMREGS || val > 0xffffff) return -EINVAL; buf = 1 << 31 | offset << MC13XXX_REGOFFSET_SHIFT | val; memset(&t, 0, sizeof(t)); t.tx_buf = &buf; t.rx_buf = &buf; t.len = sizeof(u32); spi_message_init(&m); spi_message_add_tail(&t, &m); ret = spi_sync(mc13xxx->spidev, &m); BUG_ON(!ret && m.status); if (ret) return ret; return 0; } EXPORT_SYMBOL(mc13xxx_reg_write); int mc13xxx_reg_rmw(struct mc13xxx *mc13xxx, unsigned int offset, u32 mask, u32 val) { int ret; u32 valread; BUG_ON(val & ~mask); ret = mc13xxx_reg_read(mc13xxx, offset, &valread); if (ret) return ret; valread = (valread & ~mask) | val; return mc13xxx_reg_write(mc13xxx, offset, valread); } EXPORT_SYMBOL(mc13xxx_reg_rmw); int mc13xxx_irq_mask(struct mc13xxx *mc13xxx, int irq) { int ret; unsigned int offmask = irq < 24 ? MC13XXX_IRQMASK0 : MC13XXX_IRQMASK1; u32 irqbit = 1 << (irq < 24 ? irq : irq - 24); u32 mask; if (irq < 0 || irq >= MC13XXX_NUM_IRQ) return -EINVAL; ret = mc13xxx_reg_read(mc13xxx, offmask, &mask); if (ret) return ret; if (mask & irqbit) /* already masked */ return 0; return mc13xxx_reg_write(mc13xxx, offmask, mask | irqbit); } EXPORT_SYMBOL(mc13xxx_irq_mask); int mc13xxx_irq_unmask(struct mc13xxx *mc13xxx, int irq) { int ret; unsigned int offmask = irq < 24 ? MC13XXX_IRQMASK0 : MC13XXX_IRQMASK1; u32 irqbit = 1 << (irq < 24 ? irq : irq - 24); u32 mask; if (irq < 0 || irq >= MC13XXX_NUM_IRQ) return -EINVAL; ret = mc13xxx_reg_read(mc13xxx, offmask, &mask); if (ret) return ret; if (!(mask & irqbit)) /* already unmasked */ return 0; return mc13xxx_reg_write(mc13xxx, offmask, mask & ~irqbit); } EXPORT_SYMBOL(mc13xxx_irq_unmask); int mc13xxx_irq_status(struct mc13xxx *mc13xxx, int irq, int *enabled, int *pending) { int ret; unsigned int offmask = irq < 24 ? MC13XXX_IRQMASK0 : MC13XXX_IRQMASK1; unsigned int offstat = irq < 24 ? MC13XXX_IRQSTAT0 : MC13XXX_IRQSTAT1; u32 irqbit = 1 << (irq < 24 ? irq : irq - 24); if (irq < 0 || irq >= MC13XXX_NUM_IRQ) return -EINVAL; if (enabled) { u32 mask; ret = mc13xxx_reg_read(mc13xxx, offmask, &mask); if (ret) return ret; *enabled = mask & irqbit; } if (pending) { u32 stat; ret = mc13xxx_reg_read(mc13xxx, offstat, &stat); if (ret) return ret; *pending = stat & irqbit; } return 0; } EXPORT_SYMBOL(mc13xxx_irq_status); int mc13xxx_irq_ack(struct mc13xxx *mc13xxx, int irq) { unsigned int offstat = irq < 24 ? MC13XXX_IRQSTAT0 : MC13XXX_IRQSTAT1; unsigned int val = 1 << (irq < 24 ? irq : irq - 24); BUG_ON(irq < 0 || irq >= MC13XXX_NUM_IRQ); return mc13xxx_reg_write(mc13xxx, offstat, val); } EXPORT_SYMBOL(mc13xxx_irq_ack); int mc13xxx_irq_request_nounmask(struct mc13xxx *mc13xxx, int irq, irq_handler_t handler, const char *name, void *dev) { BUG_ON(!mutex_is_locked(&mc13xxx->lock)); BUG_ON(!handler); if (irq < 0 || irq >= MC13XXX_NUM_IRQ) return -EINVAL; if (mc13xxx->irqhandler[irq]) return -EBUSY; mc13xxx->irqhandler[irq] = handler; mc13xxx->irqdata[irq] = dev; return 0; } EXPORT_SYMBOL(mc13xxx_irq_request_nounmask); int mc13xxx_irq_request(struct mc13xxx *mc13xxx, int irq, irq_handler_t handler, const char *name, void *dev) { int ret; ret = mc13xxx_irq_request_nounmask(mc13xxx, irq, handler, name, dev); if (ret) return ret; ret = mc13xxx_irq_unmask(mc13xxx, irq); if (ret) { mc13xxx->irqhandler[irq] = NULL; mc13xxx->irqdata[irq] = NULL; return ret; } return 0; } EXPORT_SYMBOL(mc13xxx_irq_request); int mc13xxx_irq_free(struct mc13xxx *mc13xxx, int irq, void *dev) { int ret; BUG_ON(!mutex_is_locked(&mc13xxx->lock)); if (irq < 0 || irq >= MC13XXX_NUM_IRQ || !mc13xxx->irqhandler[irq] || mc13xxx->irqdata[irq] != dev) return -EINVAL; ret = mc13xxx_irq_mask(mc13xxx, irq); if (ret) return ret; mc13xxx->irqhandler[irq] = NULL; mc13xxx->irqdata[irq] = NULL; return 0; } EXPORT_SYMBOL(mc13xxx_irq_free); static inline irqreturn_t mc13xxx_irqhandler(struct mc13xxx *mc13xxx, int irq) { return mc13xxx->irqhandler[irq](irq, mc13xxx->irqdata[irq]); } /* * returns: number of handled irqs or negative error * locking: holds mc13xxx->lock */ static int mc13xxx_irq_handle(struct mc13xxx *mc13xxx, unsigned int offstat, unsigned int offmask, int baseirq) { u32 stat, mask; int ret = mc13xxx_reg_read(mc13xxx, offstat, &stat); int num_handled = 0; if (ret) return ret; ret = mc13xxx_reg_read(mc13xxx, offmask, &mask); if (ret) return ret; while (stat & ~mask) { int irq = __ffs(stat & ~mask); stat &= ~(1 << irq); if (likely(mc13xxx->irqhandler[baseirq + irq])) { irqreturn_t handled; handled = mc13xxx_irqhandler(mc13xxx, baseirq + irq); if (handled == IRQ_HANDLED) num_handled++; } else { dev_err(&mc13xxx->spidev->dev, "BUG: irq %u but no handler\n", baseirq + irq); mask |= 1 << irq; ret = mc13xxx_reg_write(mc13xxx, offmask, mask); } } return num_handled; } static irqreturn_t mc13xxx_irq_thread(int irq, void *data) { struct mc13xxx *mc13xxx = data; irqreturn_t ret; int handled = 0; mc13xxx_lock(mc13xxx); ret = mc13xxx_irq_handle(mc13xxx, MC13XXX_IRQSTAT0, MC13XXX_IRQMASK0, 0); if (ret > 0) handled = 1; ret = mc13xxx_irq_handle(mc13xxx, MC13XXX_IRQSTAT1, MC13XXX_IRQMASK1, 24); if (ret > 0) handled = 1; mc13xxx_unlock(mc13xxx); return IRQ_RETVAL(handled); } enum mc13xxx_id { MC13XXX_ID_MC13783, MC13XXX_ID_MC13892, MC13XXX_ID_INVALID, }; static const char *mc13xxx_chipname[] = { [MC13XXX_ID_MC13783] = "mc13783", [MC13XXX_ID_MC13892] = "mc13892", }; #define maskval(reg, mask) (((reg) & (mask)) >> __ffs(mask)) static int mc13xxx_identify(struct mc13xxx *mc13xxx, enum mc13xxx_id *id) { u32 icid; u32 revision; const char *name; int ret; ret = mc13xxx_reg_read(mc13xxx, 46, &icid); if (ret) return ret; icid = (icid >> 6) & 0x7; switch (icid) { case 2: *id = MC13XXX_ID_MC13783; name = "mc13783"; break; case 7: *id = MC13XXX_ID_MC13892; name = "mc13892"; break; default: *id = MC13XXX_ID_INVALID; break; } if (*id == MC13XXX_ID_MC13783 || *id == MC13XXX_ID_MC13892) { ret = mc13xxx_reg_read(mc13xxx, MC13XXX_REVISION, &revision); if (ret) return ret; dev_info(&mc13xxx->spidev->dev, "%s: rev: %d.%d, " "fin: %d, fab: %d, icid: %d/%d\n", mc13xxx_chipname[*id], maskval(revision, MC13XXX_REVISION_REVFULL), maskval(revision, MC13XXX_REVISION_REVMETAL), maskval(revision, MC13XXX_REVISION_FIN), maskval(revision, MC13XXX_REVISION_FAB), maskval(revision, MC13XXX_REVISION_ICID), maskval(revision, MC13XXX_REVISION_ICIDCODE)); } if (*id != MC13XXX_ID_INVALID) { const struct spi_device_id *devid = spi_get_device_id(mc13xxx->spidev); if (!devid || devid->driver_data != *id) dev_warn(&mc13xxx->spidev->dev, "device id doesn't " "match auto detection!\n"); } return 0; } static const char *mc13xxx_get_chipname(struct mc13xxx *mc13xxx) { const struct spi_device_id *devid = spi_get_device_id(mc13xxx->spidev); if (!devid) return NULL; return mc13xxx_chipname[devid->driver_data]; } int mc13xxx_get_flags(struct mc13xxx *mc13xxx) { struct mc13xxx_platform_data *pdata = dev_get_platdata(&mc13xxx->spidev->dev); return pdata->flags; } EXPORT_SYMBOL(mc13xxx_get_flags); #define MC13XXX_ADC1_CHAN0_SHIFT 5 #define MC13XXX_ADC1_CHAN1_SHIFT 8 struct mc13xxx_adcdone_data { struct mc13xxx *mc13xxx; struct completion done; }; static irqreturn_t mc13xxx_handler_adcdone(int irq, void *data) { struct mc13xxx_adcdone_data *adcdone_data = data; mc13xxx_irq_ack(adcdone_data->mc13xxx, irq); complete_all(&adcdone_data->done); return IRQ_HANDLED; } #define MC13XXX_ADC_WORKING (1 << 0) int mc13xxx_adc_do_conversion(struct mc13xxx *mc13xxx, unsigned int mode, unsigned int channel, unsigned int *sample) { u32 adc0, adc1, old_adc0; int i, ret; struct mc13xxx_adcdone_data adcdone_data = { .mc13xxx = mc13xxx, }; init_completion(&adcdone_data.done); dev_dbg(&mc13xxx->spidev->dev, "%s\n", __func__); mc13xxx_lock(mc13xxx); if (mc13xxx->adcflags & MC13XXX_ADC_WORKING) { ret = -EBUSY; goto out; } mc13xxx->adcflags |= MC13XXX_ADC_WORKING; mc13xxx_reg_read(mc13xxx, MC13XXX_ADC0, &old_adc0); adc0 = MC13XXX_ADC0_ADINC1 | MC13XXX_ADC0_ADINC2; adc1 = MC13XXX_ADC1_ADEN | MC13XXX_ADC1_ADTRIGIGN | MC13XXX_ADC1_ASC; if (channel > 7) adc1 |= MC13XXX_ADC1_ADSEL; switch (mode) { case MC13XXX_ADC_MODE_TS: adc0 |= MC13XXX_ADC0_ADREFEN | MC13XXX_ADC0_TSMOD0 | MC13XXX_ADC0_TSMOD1; adc1 |= 4 << MC13XXX_ADC1_CHAN1_SHIFT; break; case MC13XXX_ADC_MODE_SINGLE_CHAN: adc0 |= old_adc0 & MC13XXX_ADC0_CONFIG_MASK; adc1 |= (channel & 0x7) << MC13XXX_ADC1_CHAN0_SHIFT; adc1 |= MC13XXX_ADC1_RAND; break; case MC13XXX_ADC_MODE_MULT_CHAN: adc0 |= old_adc0 & MC13XXX_ADC0_CONFIG_MASK; adc1 |= 4 << MC13XXX_ADC1_CHAN1_SHIFT; break; default: mc13xxx_unlock(mc13xxx); return -EINVAL; } dev_dbg(&mc13xxx->spidev->dev, "%s: request irq\n", __func__); mc13xxx_irq_request(mc13xxx, MC13XXX_IRQ_ADCDONE, mc13xxx_handler_adcdone, __func__, &adcdone_data); mc13xxx_irq_ack(mc13xxx, MC13XXX_IRQ_ADCDONE); mc13xxx_reg_write(mc13xxx, MC13XXX_ADC0, adc0); mc13xxx_reg_write(mc13xxx, MC13XXX_ADC1, adc1); mc13xxx_unlock(mc13xxx); ret = wait_for_completion_interruptible_timeout(&adcdone_data.done, HZ); if (!ret) ret = -ETIMEDOUT; mc13xxx_lock(mc13xxx); mc13xxx_irq_free(mc13xxx, MC13XXX_IRQ_ADCDONE, &adcdone_data); if (ret > 0) for (i = 0; i < 4; ++i) { ret = mc13xxx_reg_read(mc13xxx, MC13XXX_ADC2, &sample[i]); if (ret) break; } if (mode == MC13XXX_ADC_MODE_TS) /* restore TSMOD */ mc13xxx_reg_write(mc13xxx, MC13XXX_ADC0, old_adc0); mc13xxx->adcflags &= ~MC13XXX_ADC_WORKING; out: mc13xxx_unlock(mc13xxx); return ret; } EXPORT_SYMBOL_GPL(mc13xxx_adc_do_conversion); static int mc13xxx_add_subdevice_pdata(struct mc13xxx *mc13xxx, const char *format, void *pdata, size_t pdata_size) { char buf[30]; const char *name = mc13xxx_get_chipname(mc13xxx); struct mfd_cell cell = { .platform_data = pdata, .pdata_size = pdata_size, }; /* there is no asnprintf in the kernel :-( */ if (snprintf(buf, sizeof(buf), format, name) > sizeof(buf)) return -E2BIG; cell.name = kmemdup(buf, strlen(buf) + 1, GFP_KERNEL); if (!cell.name) return -ENOMEM; return mfd_add_devices(&mc13xxx->spidev->dev, -1, &cell, 1, NULL, 0); } static int mc13xxx_add_subdevice(struct mc13xxx *mc13xxx, const char *format) { return mc13xxx_add_subdevice_pdata(mc13xxx, format, NULL, 0); } static int mc13xxx_probe(struct spi_device *spi) { struct mc13xxx *mc13xxx; struct mc13xxx_platform_data *pdata = dev_get_platdata(&spi->dev); enum mc13xxx_id id; int ret; if (!pdata) { dev_err(&spi->dev, "invalid platform data\n"); return -EINVAL; } mc13xxx = kzalloc(sizeof(*mc13xxx), GFP_KERNEL); if (!mc13xxx) return -ENOMEM; dev_set_drvdata(&spi->dev, mc13xxx); spi->mode = SPI_MODE_0 | SPI_CS_HIGH; spi->bits_per_word = 32; spi_setup(spi); mc13xxx->spidev = spi; mutex_init(&mc13xxx->lock); mc13xxx_lock(mc13xxx); ret = mc13xxx_identify(mc13xxx, &id); if (ret || id == MC13XXX_ID_INVALID) goto err_revision; /* mask all irqs */ ret = mc13xxx_reg_write(mc13xxx, MC13XXX_IRQMASK0, 0x00ffffff); if (ret) goto err_mask; ret = mc13xxx_reg_write(mc13xxx, MC13XXX_IRQMASK1, 0x00ffffff); if (ret) goto err_mask; ret = request_threaded_irq(spi->irq, NULL, mc13xxx_irq_thread, IRQF_ONESHOT | IRQF_TRIGGER_HIGH, "mc13xxx", mc13xxx); if (ret) { err_mask: err_revision: mc13xxx_unlock(mc13xxx); dev_set_drvdata(&spi->dev, NULL); kfree(mc13xxx); return ret; } mc13xxx_unlock(mc13xxx); if (pdata->flags & MC13XXX_USE_ADC) mc13xxx_add_subdevice(mc13xxx, "%s-adc"); if (pdata->flags & MC13XXX_USE_CODEC) mc13xxx_add_subdevice(mc13xxx, "%s-codec"); mc13xxx_add_subdevice_pdata(mc13xxx, "%s-regulator", &pdata->regulators, sizeof(pdata->regulators)); if (pdata->flags & MC13XXX_USE_RTC) mc13xxx_add_subdevice(mc13xxx, "%s-rtc"); if (pdata->flags & MC13XXX_USE_TOUCHSCREEN) mc13xxx_add_subdevice(mc13xxx, "%s-ts"); if (pdata->leds) mc13xxx_add_subdevice_pdata(mc13xxx, "%s-led", pdata->leds, sizeof(*pdata->leds)); if (pdata->buttons) mc13xxx_add_subdevice_pdata(mc13xxx, "%s-pwrbutton", pdata->buttons, sizeof(*pdata->buttons)); return 0; } static int __devexit mc13xxx_remove(struct spi_device *spi) { struct mc13xxx *mc13xxx = dev_get_drvdata(&spi->dev); free_irq(mc13xxx->spidev->irq, mc13xxx); mfd_remove_devices(&spi->dev); kfree(mc13xxx); return 0; } static const struct spi_device_id mc13xxx_device_id[] = { { .name = "mc13783", .driver_data = MC13XXX_ID_MC13783, }, { .name = "mc13892", .driver_data = MC13XXX_ID_MC13892, }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(spi, mc13xxx_device_id); static struct spi_driver mc13xxx_driver = { .id_table = mc13xxx_device_id, .driver = { .name = "mc13xxx", .owner = THIS_MODULE, }, .probe = mc13xxx_probe, .remove = __devexit_p(mc13xxx_remove), }; static int __init mc13xxx_init(void) { return spi_register_driver(&mc13xxx_driver); } subsys_initcall(mc13xxx_init); static void __exit mc13xxx_exit(void) { spi_unregister_driver(&mc13xxx_driver); } module_exit(mc13xxx_exit); MODULE_DESCRIPTION("Core driver for Freescale MC13XXX PMIC"); MODULE_AUTHOR("Uwe Kleine-Koenig "); MODULE_LICENSE("GPL v2");