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513 lines
13 KiB
513 lines
13 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright 2009-2010 Pengutronix |
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* Uwe Kleine-Koenig <[email protected]> |
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* |
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* loosely based on an earlier driver that has |
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* Copyright 2009 Pengutronix, Sascha Hauer <[email protected]> |
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*/ |
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#include <linux/module.h> |
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#include <linux/of.h> |
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#include <linux/of_device.h> |
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#include <linux/platform_device.h> |
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#include <linux/mfd/core.h> |
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#include "mc13xxx.h" |
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#define MC13XXX_IRQSTAT0 0 |
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#define MC13XXX_IRQMASK0 1 |
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#define MC13XXX_IRQSTAT1 3 |
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#define MC13XXX_IRQMASK1 4 |
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#define MC13XXX_REVISION 7 |
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#define MC13XXX_REVISION_REVMETAL (0x07 << 0) |
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#define MC13XXX_REVISION_REVFULL (0x03 << 3) |
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#define MC13XXX_REVISION_ICID (0x07 << 6) |
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#define MC13XXX_REVISION_FIN (0x03 << 9) |
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#define MC13XXX_REVISION_FAB (0x03 << 11) |
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#define MC13XXX_REVISION_ICIDCODE (0x3f << 13) |
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#define MC34708_REVISION_REVMETAL (0x07 << 0) |
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#define MC34708_REVISION_REVFULL (0x07 << 3) |
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#define MC34708_REVISION_FIN (0x07 << 6) |
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#define MC34708_REVISION_FAB (0x07 << 9) |
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#define MC13XXX_PWRCTRL 15 |
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#define MC13XXX_PWRCTRL_WDIRESET (1 << 12) |
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#define MC13XXX_ADC1 44 |
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#define MC13XXX_ADC1_ADEN (1 << 0) |
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#define MC13XXX_ADC1_RAND (1 << 1) |
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#define MC13XXX_ADC1_ADSEL (1 << 3) |
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#define MC13XXX_ADC1_ASC (1 << 20) |
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#define MC13XXX_ADC1_ADTRIGIGN (1 << 21) |
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#define MC13XXX_ADC2 45 |
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void mc13xxx_lock(struct mc13xxx *mc13xxx) |
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{ |
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if (!mutex_trylock(&mc13xxx->lock)) { |
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dev_dbg(mc13xxx->dev, "wait for %s from %ps\n", |
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__func__, __builtin_return_address(0)); |
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mutex_lock(&mc13xxx->lock); |
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} |
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dev_dbg(mc13xxx->dev, "%s from %ps\n", |
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__func__, __builtin_return_address(0)); |
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} |
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EXPORT_SYMBOL(mc13xxx_lock); |
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void mc13xxx_unlock(struct mc13xxx *mc13xxx) |
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{ |
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dev_dbg(mc13xxx->dev, "%s from %ps\n", |
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__func__, __builtin_return_address(0)); |
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mutex_unlock(&mc13xxx->lock); |
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} |
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EXPORT_SYMBOL(mc13xxx_unlock); |
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int mc13xxx_reg_read(struct mc13xxx *mc13xxx, unsigned int offset, u32 *val) |
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{ |
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int ret; |
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ret = regmap_read(mc13xxx->regmap, offset, val); |
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dev_vdbg(mc13xxx->dev, "[0x%02x] -> 0x%06x\n", offset, *val); |
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return ret; |
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} |
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EXPORT_SYMBOL(mc13xxx_reg_read); |
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int mc13xxx_reg_write(struct mc13xxx *mc13xxx, unsigned int offset, u32 val) |
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{ |
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dev_vdbg(mc13xxx->dev, "[0x%02x] <- 0x%06x\n", offset, val); |
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if (val >= BIT(24)) |
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return -EINVAL; |
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return regmap_write(mc13xxx->regmap, offset, val); |
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} |
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EXPORT_SYMBOL(mc13xxx_reg_write); |
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int mc13xxx_reg_rmw(struct mc13xxx *mc13xxx, unsigned int offset, |
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u32 mask, u32 val) |
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{ |
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BUG_ON(val & ~mask); |
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dev_vdbg(mc13xxx->dev, "[0x%02x] <- 0x%06x (mask: 0x%06x)\n", |
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offset, val, mask); |
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return regmap_update_bits(mc13xxx->regmap, offset, mask, val); |
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} |
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EXPORT_SYMBOL(mc13xxx_reg_rmw); |
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int mc13xxx_irq_mask(struct mc13xxx *mc13xxx, int irq) |
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{ |
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int virq = regmap_irq_get_virq(mc13xxx->irq_data, irq); |
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disable_irq_nosync(virq); |
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return 0; |
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} |
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EXPORT_SYMBOL(mc13xxx_irq_mask); |
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int mc13xxx_irq_unmask(struct mc13xxx *mc13xxx, int irq) |
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{ |
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int virq = regmap_irq_get_virq(mc13xxx->irq_data, irq); |
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enable_irq(virq); |
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return 0; |
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} |
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EXPORT_SYMBOL(mc13xxx_irq_unmask); |
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int mc13xxx_irq_status(struct mc13xxx *mc13xxx, int irq, |
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int *enabled, int *pending) |
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{ |
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int ret; |
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unsigned int offmask = irq < 24 ? MC13XXX_IRQMASK0 : MC13XXX_IRQMASK1; |
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unsigned int offstat = irq < 24 ? MC13XXX_IRQSTAT0 : MC13XXX_IRQSTAT1; |
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u32 irqbit = 1 << (irq < 24 ? irq : irq - 24); |
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if (irq < 0 || irq >= ARRAY_SIZE(mc13xxx->irqs)) |
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return -EINVAL; |
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if (enabled) { |
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u32 mask; |
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ret = mc13xxx_reg_read(mc13xxx, offmask, &mask); |
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if (ret) |
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return ret; |
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*enabled = mask & irqbit; |
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} |
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if (pending) { |
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u32 stat; |
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ret = mc13xxx_reg_read(mc13xxx, offstat, &stat); |
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if (ret) |
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return ret; |
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*pending = stat & irqbit; |
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} |
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return 0; |
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} |
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EXPORT_SYMBOL(mc13xxx_irq_status); |
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int mc13xxx_irq_request(struct mc13xxx *mc13xxx, int irq, |
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irq_handler_t handler, const char *name, void *dev) |
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{ |
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int virq = regmap_irq_get_virq(mc13xxx->irq_data, irq); |
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return devm_request_threaded_irq(mc13xxx->dev, virq, NULL, handler, |
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IRQF_ONESHOT, name, dev); |
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} |
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EXPORT_SYMBOL(mc13xxx_irq_request); |
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int mc13xxx_irq_free(struct mc13xxx *mc13xxx, int irq, void *dev) |
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{ |
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int virq = regmap_irq_get_virq(mc13xxx->irq_data, irq); |
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devm_free_irq(mc13xxx->dev, virq, dev); |
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return 0; |
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} |
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EXPORT_SYMBOL(mc13xxx_irq_free); |
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#define maskval(reg, mask) (((reg) & (mask)) >> __ffs(mask)) |
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static void mc13xxx_print_revision(struct mc13xxx *mc13xxx, u32 revision) |
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{ |
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dev_info(mc13xxx->dev, "%s: rev: %d.%d, " |
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"fin: %d, fab: %d, icid: %d/%d\n", |
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mc13xxx->variant->name, |
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maskval(revision, MC13XXX_REVISION_REVFULL), |
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maskval(revision, MC13XXX_REVISION_REVMETAL), |
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maskval(revision, MC13XXX_REVISION_FIN), |
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maskval(revision, MC13XXX_REVISION_FAB), |
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maskval(revision, MC13XXX_REVISION_ICID), |
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maskval(revision, MC13XXX_REVISION_ICIDCODE)); |
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} |
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static void mc34708_print_revision(struct mc13xxx *mc13xxx, u32 revision) |
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{ |
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dev_info(mc13xxx->dev, "%s: rev %d.%d, fin: %d, fab: %d\n", |
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mc13xxx->variant->name, |
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maskval(revision, MC34708_REVISION_REVFULL), |
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maskval(revision, MC34708_REVISION_REVMETAL), |
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maskval(revision, MC34708_REVISION_FIN), |
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maskval(revision, MC34708_REVISION_FAB)); |
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} |
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/* These are only exported for mc13xxx-i2c and mc13xxx-spi */ |
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struct mc13xxx_variant mc13xxx_variant_mc13783 = { |
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.name = "mc13783", |
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.print_revision = mc13xxx_print_revision, |
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}; |
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EXPORT_SYMBOL_GPL(mc13xxx_variant_mc13783); |
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struct mc13xxx_variant mc13xxx_variant_mc13892 = { |
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.name = "mc13892", |
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.print_revision = mc13xxx_print_revision, |
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}; |
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EXPORT_SYMBOL_GPL(mc13xxx_variant_mc13892); |
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struct mc13xxx_variant mc13xxx_variant_mc34708 = { |
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.name = "mc34708", |
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.print_revision = mc34708_print_revision, |
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}; |
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EXPORT_SYMBOL_GPL(mc13xxx_variant_mc34708); |
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static const char *mc13xxx_get_chipname(struct mc13xxx *mc13xxx) |
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{ |
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return mc13xxx->variant->name; |
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} |
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int mc13xxx_get_flags(struct mc13xxx *mc13xxx) |
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{ |
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return mc13xxx->flags; |
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} |
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EXPORT_SYMBOL(mc13xxx_get_flags); |
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#define MC13XXX_ADC1_CHAN0_SHIFT 5 |
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#define MC13XXX_ADC1_CHAN1_SHIFT 8 |
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#define MC13783_ADC1_ATO_SHIFT 11 |
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#define MC13783_ADC1_ATOX (1 << 19) |
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struct mc13xxx_adcdone_data { |
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struct mc13xxx *mc13xxx; |
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struct completion done; |
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}; |
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static irqreturn_t mc13xxx_handler_adcdone(int irq, void *data) |
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{ |
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struct mc13xxx_adcdone_data *adcdone_data = data; |
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complete_all(&adcdone_data->done); |
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return IRQ_HANDLED; |
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} |
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#define MC13XXX_ADC_WORKING (1 << 0) |
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int mc13xxx_adc_do_conversion(struct mc13xxx *mc13xxx, unsigned int mode, |
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unsigned int channel, u8 ato, bool atox, |
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unsigned int *sample) |
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{ |
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u32 adc0, adc1, old_adc0; |
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int i, ret; |
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struct mc13xxx_adcdone_data adcdone_data = { |
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.mc13xxx = mc13xxx, |
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}; |
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init_completion(&adcdone_data.done); |
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dev_dbg(mc13xxx->dev, "%s\n", __func__); |
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mc13xxx_lock(mc13xxx); |
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if (mc13xxx->adcflags & MC13XXX_ADC_WORKING) { |
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ret = -EBUSY; |
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goto out; |
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} |
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mc13xxx->adcflags |= MC13XXX_ADC_WORKING; |
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ret = mc13xxx_reg_read(mc13xxx, MC13XXX_ADC0, &old_adc0); |
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if (ret) |
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goto out; |
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adc0 = MC13XXX_ADC0_ADINC1 | MC13XXX_ADC0_ADINC2 | |
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MC13XXX_ADC0_CHRGRAWDIV; |
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adc1 = MC13XXX_ADC1_ADEN | MC13XXX_ADC1_ADTRIGIGN | MC13XXX_ADC1_ASC; |
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/* |
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* Channels mapped through ADIN7: |
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* 7 - General purpose ADIN7 |
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* 16 - UID |
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* 17 - Die temperature |
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*/ |
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if (channel > 7 && channel < 16) { |
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adc1 |= MC13XXX_ADC1_ADSEL; |
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} else if (channel == 16) { |
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adc0 |= MC13XXX_ADC0_ADIN7SEL_UID; |
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channel = 7; |
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} else if (channel == 17) { |
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adc0 |= MC13XXX_ADC0_ADIN7SEL_DIE; |
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channel = 7; |
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} |
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switch (mode) { |
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case MC13XXX_ADC_MODE_TS: |
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adc0 |= MC13XXX_ADC0_ADREFEN | MC13XXX_ADC0_TSMOD0 | |
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MC13XXX_ADC0_TSMOD1; |
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adc1 |= 4 << MC13XXX_ADC1_CHAN1_SHIFT; |
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break; |
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case MC13XXX_ADC_MODE_SINGLE_CHAN: |
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adc0 |= old_adc0 & MC13XXX_ADC0_CONFIG_MASK; |
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adc1 |= (channel & 0x7) << MC13XXX_ADC1_CHAN0_SHIFT; |
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adc1 |= MC13XXX_ADC1_RAND; |
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break; |
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case MC13XXX_ADC_MODE_MULT_CHAN: |
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adc0 |= old_adc0 & MC13XXX_ADC0_CONFIG_MASK; |
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adc1 |= 4 << MC13XXX_ADC1_CHAN1_SHIFT; |
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break; |
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default: |
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mc13xxx_unlock(mc13xxx); |
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return -EINVAL; |
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} |
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adc1 |= ato << MC13783_ADC1_ATO_SHIFT; |
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if (atox) |
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adc1 |= MC13783_ADC1_ATOX; |
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dev_dbg(mc13xxx->dev, "%s: request irq\n", __func__); |
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mc13xxx_irq_request(mc13xxx, MC13XXX_IRQ_ADCDONE, |
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mc13xxx_handler_adcdone, __func__, &adcdone_data); |
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mc13xxx_reg_write(mc13xxx, MC13XXX_ADC0, adc0); |
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mc13xxx_reg_write(mc13xxx, MC13XXX_ADC1, adc1); |
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mc13xxx_unlock(mc13xxx); |
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ret = wait_for_completion_interruptible_timeout(&adcdone_data.done, HZ); |
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if (!ret) |
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ret = -ETIMEDOUT; |
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mc13xxx_lock(mc13xxx); |
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mc13xxx_irq_free(mc13xxx, MC13XXX_IRQ_ADCDONE, &adcdone_data); |
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if (ret > 0) |
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for (i = 0; i < 4; ++i) { |
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ret = mc13xxx_reg_read(mc13xxx, |
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MC13XXX_ADC2, &sample[i]); |
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if (ret) |
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break; |
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} |
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if (mode == MC13XXX_ADC_MODE_TS) |
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/* restore TSMOD */ |
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mc13xxx_reg_write(mc13xxx, MC13XXX_ADC0, old_adc0); |
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mc13xxx->adcflags &= ~MC13XXX_ADC_WORKING; |
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out: |
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mc13xxx_unlock(mc13xxx); |
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return ret; |
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} |
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EXPORT_SYMBOL_GPL(mc13xxx_adc_do_conversion); |
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static int mc13xxx_add_subdevice_pdata(struct mc13xxx *mc13xxx, |
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const char *format, void *pdata, size_t pdata_size) |
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{ |
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char buf[30]; |
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const char *name = mc13xxx_get_chipname(mc13xxx); |
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struct mfd_cell cell = { |
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.platform_data = pdata, |
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.pdata_size = pdata_size, |
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}; |
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/* there is no asnprintf in the kernel :-( */ |
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if (snprintf(buf, sizeof(buf), format, name) > sizeof(buf)) |
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return -E2BIG; |
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cell.name = kmemdup(buf, strlen(buf) + 1, GFP_KERNEL); |
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if (!cell.name) |
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return -ENOMEM; |
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return mfd_add_devices(mc13xxx->dev, -1, &cell, 1, NULL, 0, |
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regmap_irq_get_domain(mc13xxx->irq_data)); |
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} |
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static int mc13xxx_add_subdevice(struct mc13xxx *mc13xxx, const char *format) |
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{ |
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return mc13xxx_add_subdevice_pdata(mc13xxx, format, NULL, 0); |
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} |
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#ifdef CONFIG_OF |
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static int mc13xxx_probe_flags_dt(struct mc13xxx *mc13xxx) |
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{ |
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struct device_node *np = mc13xxx->dev->of_node; |
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if (!np) |
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return -ENODEV; |
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if (of_property_read_bool(np, "fsl,mc13xxx-uses-adc")) |
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mc13xxx->flags |= MC13XXX_USE_ADC; |
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if (of_property_read_bool(np, "fsl,mc13xxx-uses-codec")) |
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mc13xxx->flags |= MC13XXX_USE_CODEC; |
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if (of_property_read_bool(np, "fsl,mc13xxx-uses-rtc")) |
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mc13xxx->flags |= MC13XXX_USE_RTC; |
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if (of_property_read_bool(np, "fsl,mc13xxx-uses-touch")) |
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mc13xxx->flags |= MC13XXX_USE_TOUCHSCREEN; |
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return 0; |
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} |
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#else |
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static inline int mc13xxx_probe_flags_dt(struct mc13xxx *mc13xxx) |
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{ |
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return -ENODEV; |
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} |
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#endif |
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int mc13xxx_common_init(struct device *dev) |
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{ |
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struct mc13xxx_platform_data *pdata = dev_get_platdata(dev); |
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struct mc13xxx *mc13xxx = dev_get_drvdata(dev); |
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u32 revision; |
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int i, ret; |
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mc13xxx->dev = dev; |
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ret = mc13xxx_reg_read(mc13xxx, MC13XXX_REVISION, &revision); |
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if (ret) |
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return ret; |
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mc13xxx->variant->print_revision(mc13xxx, revision); |
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ret = mc13xxx_reg_rmw(mc13xxx, MC13XXX_PWRCTRL, |
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MC13XXX_PWRCTRL_WDIRESET, MC13XXX_PWRCTRL_WDIRESET); |
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if (ret) |
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return ret; |
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for (i = 0; i < ARRAY_SIZE(mc13xxx->irqs); i++) { |
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mc13xxx->irqs[i].reg_offset = i / MC13XXX_IRQ_PER_REG; |
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mc13xxx->irqs[i].mask = BIT(i % MC13XXX_IRQ_PER_REG); |
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} |
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mc13xxx->irq_chip.name = dev_name(dev); |
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mc13xxx->irq_chip.status_base = MC13XXX_IRQSTAT0; |
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mc13xxx->irq_chip.mask_base = MC13XXX_IRQMASK0; |
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mc13xxx->irq_chip.ack_base = MC13XXX_IRQSTAT0; |
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mc13xxx->irq_chip.irq_reg_stride = MC13XXX_IRQSTAT1 - MC13XXX_IRQSTAT0; |
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mc13xxx->irq_chip.init_ack_masked = true; |
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mc13xxx->irq_chip.use_ack = true; |
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mc13xxx->irq_chip.num_regs = MC13XXX_IRQ_REG_CNT; |
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mc13xxx->irq_chip.irqs = mc13xxx->irqs; |
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mc13xxx->irq_chip.num_irqs = ARRAY_SIZE(mc13xxx->irqs); |
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ret = regmap_add_irq_chip(mc13xxx->regmap, mc13xxx->irq, IRQF_ONESHOT, |
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0, &mc13xxx->irq_chip, &mc13xxx->irq_data); |
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if (ret) |
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return ret; |
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mutex_init(&mc13xxx->lock); |
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if (mc13xxx_probe_flags_dt(mc13xxx) < 0 && pdata) |
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mc13xxx->flags = pdata->flags; |
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if (pdata) { |
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mc13xxx_add_subdevice_pdata(mc13xxx, "%s-regulator", |
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&pdata->regulators, sizeof(pdata->regulators)); |
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mc13xxx_add_subdevice_pdata(mc13xxx, "%s-led", |
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pdata->leds, sizeof(*pdata->leds)); |
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mc13xxx_add_subdevice_pdata(mc13xxx, "%s-pwrbutton", |
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pdata->buttons, sizeof(*pdata->buttons)); |
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if (mc13xxx->flags & MC13XXX_USE_CODEC) |
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mc13xxx_add_subdevice_pdata(mc13xxx, "%s-codec", |
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pdata->codec, sizeof(*pdata->codec)); |
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if (mc13xxx->flags & MC13XXX_USE_TOUCHSCREEN) |
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mc13xxx_add_subdevice_pdata(mc13xxx, "%s-ts", |
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&pdata->touch, sizeof(pdata->touch)); |
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} else { |
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mc13xxx_add_subdevice(mc13xxx, "%s-regulator"); |
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mc13xxx_add_subdevice(mc13xxx, "%s-led"); |
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mc13xxx_add_subdevice(mc13xxx, "%s-pwrbutton"); |
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if (mc13xxx->flags & MC13XXX_USE_CODEC) |
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mc13xxx_add_subdevice(mc13xxx, "%s-codec"); |
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if (mc13xxx->flags & MC13XXX_USE_TOUCHSCREEN) |
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mc13xxx_add_subdevice(mc13xxx, "%s-ts"); |
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} |
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if (mc13xxx->flags & MC13XXX_USE_ADC) |
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mc13xxx_add_subdevice(mc13xxx, "%s-adc"); |
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if (mc13xxx->flags & MC13XXX_USE_RTC) |
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mc13xxx_add_subdevice(mc13xxx, "%s-rtc"); |
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return 0; |
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} |
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EXPORT_SYMBOL_GPL(mc13xxx_common_init); |
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int mc13xxx_common_exit(struct device *dev) |
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{ |
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struct mc13xxx *mc13xxx = dev_get_drvdata(dev); |
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mfd_remove_devices(dev); |
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regmap_del_irq_chip(mc13xxx->irq, mc13xxx->irq_data); |
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mutex_destroy(&mc13xxx->lock); |
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return 0; |
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} |
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EXPORT_SYMBOL_GPL(mc13xxx_common_exit); |
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|
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MODULE_DESCRIPTION("Core driver for Freescale MC13XXX PMIC"); |
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MODULE_AUTHOR("Uwe Kleine-Koenig <[email protected]>"); |
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MODULE_LICENSE("GPL v2");
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