![Sachin Kamat](/assets/img/avatar_default.png)
'of_match_ptr' is defined in linux/of.h. Include it explicitly to avoid breakage in the future. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
598 lines
15 KiB
C
598 lines
15 KiB
C
/*
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* Core driver for TI TPS6586x PMIC family
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*
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* Copyright (c) 2010 CompuLab Ltd.
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* Mike Rapoport <mike@compulab.co.il>
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*
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* Based on da903x.c.
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* Copyright (C) 2008 Compulab, Ltd.
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* Mike Rapoport <mike@compulab.co.il>
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* Copyright (C) 2006-2008 Marvell International Ltd.
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* Eric Miao <eric.miao@marvell.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/irqdomain.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/slab.h>
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#include <linux/err.h>
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#include <linux/i2c.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/of.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/tps6586x.h>
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#define TPS6586X_SUPPLYENE 0x14
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#define EXITSLREQ_BIT BIT(1)
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#define SLEEP_MODE_BIT BIT(3)
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/* interrupt control registers */
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#define TPS6586X_INT_ACK1 0xb5
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#define TPS6586X_INT_ACK2 0xb6
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#define TPS6586X_INT_ACK3 0xb7
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#define TPS6586X_INT_ACK4 0xb8
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/* interrupt mask registers */
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#define TPS6586X_INT_MASK1 0xb0
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#define TPS6586X_INT_MASK2 0xb1
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#define TPS6586X_INT_MASK3 0xb2
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#define TPS6586X_INT_MASK4 0xb3
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#define TPS6586X_INT_MASK5 0xb4
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/* device id */
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#define TPS6586X_VERSIONCRC 0xcd
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/* Maximum register */
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#define TPS6586X_MAX_REGISTER (TPS6586X_VERSIONCRC + 1)
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struct tps6586x_irq_data {
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u8 mask_reg;
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u8 mask_mask;
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};
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#define TPS6586X_IRQ(_reg, _mask) \
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{ \
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.mask_reg = (_reg) - TPS6586X_INT_MASK1, \
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.mask_mask = (_mask), \
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}
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static const struct tps6586x_irq_data tps6586x_irqs[] = {
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[TPS6586X_INT_PLDO_0] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 0),
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[TPS6586X_INT_PLDO_1] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 1),
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[TPS6586X_INT_PLDO_2] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 2),
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[TPS6586X_INT_PLDO_3] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 3),
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[TPS6586X_INT_PLDO_4] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 4),
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[TPS6586X_INT_PLDO_5] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 5),
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[TPS6586X_INT_PLDO_6] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 6),
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[TPS6586X_INT_PLDO_7] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 7),
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[TPS6586X_INT_COMP_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 0),
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[TPS6586X_INT_ADC] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 1),
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[TPS6586X_INT_PLDO_8] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 2),
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[TPS6586X_INT_PLDO_9] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 3),
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[TPS6586X_INT_PSM_0] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 4),
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[TPS6586X_INT_PSM_1] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 5),
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[TPS6586X_INT_PSM_2] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 6),
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[TPS6586X_INT_PSM_3] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 7),
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[TPS6586X_INT_RTC_ALM1] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 4),
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[TPS6586X_INT_ACUSB_OVP] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 0x03),
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[TPS6586X_INT_USB_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 2),
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[TPS6586X_INT_AC_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 3),
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[TPS6586X_INT_BAT_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 1 << 0),
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[TPS6586X_INT_CHG_STAT] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 0xfc),
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[TPS6586X_INT_CHG_TEMP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0x06),
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[TPS6586X_INT_PP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0xf0),
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[TPS6586X_INT_RESUME] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 5),
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[TPS6586X_INT_LOW_SYS] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 6),
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[TPS6586X_INT_RTC_ALM2] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 1),
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};
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static struct resource tps6586x_rtc_resources[] = {
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{
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.start = TPS6586X_INT_RTC_ALM1,
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.end = TPS6586X_INT_RTC_ALM1,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct mfd_cell tps6586x_cell[] = {
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{
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.name = "tps6586x-gpio",
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},
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{
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.name = "tps6586x-regulator",
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},
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{
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.name = "tps6586x-rtc",
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.num_resources = ARRAY_SIZE(tps6586x_rtc_resources),
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.resources = &tps6586x_rtc_resources[0],
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},
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{
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.name = "tps6586x-onkey",
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},
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};
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struct tps6586x {
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struct device *dev;
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struct i2c_client *client;
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struct regmap *regmap;
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int irq;
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struct irq_chip irq_chip;
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struct mutex irq_lock;
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int irq_base;
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u32 irq_en;
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u8 mask_reg[5];
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struct irq_domain *irq_domain;
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};
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static inline struct tps6586x *dev_to_tps6586x(struct device *dev)
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{
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return i2c_get_clientdata(to_i2c_client(dev));
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}
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int tps6586x_write(struct device *dev, int reg, uint8_t val)
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{
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struct tps6586x *tps6586x = dev_to_tps6586x(dev);
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return regmap_write(tps6586x->regmap, reg, val);
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}
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EXPORT_SYMBOL_GPL(tps6586x_write);
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int tps6586x_writes(struct device *dev, int reg, int len, uint8_t *val)
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{
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struct tps6586x *tps6586x = dev_to_tps6586x(dev);
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return regmap_bulk_write(tps6586x->regmap, reg, val, len);
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}
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EXPORT_SYMBOL_GPL(tps6586x_writes);
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int tps6586x_read(struct device *dev, int reg, uint8_t *val)
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{
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struct tps6586x *tps6586x = dev_to_tps6586x(dev);
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unsigned int rval;
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int ret;
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ret = regmap_read(tps6586x->regmap, reg, &rval);
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if (!ret)
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*val = rval;
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return ret;
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}
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EXPORT_SYMBOL_GPL(tps6586x_read);
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int tps6586x_reads(struct device *dev, int reg, int len, uint8_t *val)
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{
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struct tps6586x *tps6586x = dev_to_tps6586x(dev);
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return regmap_bulk_read(tps6586x->regmap, reg, val, len);
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}
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EXPORT_SYMBOL_GPL(tps6586x_reads);
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int tps6586x_set_bits(struct device *dev, int reg, uint8_t bit_mask)
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{
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struct tps6586x *tps6586x = dev_to_tps6586x(dev);
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return regmap_update_bits(tps6586x->regmap, reg, bit_mask, bit_mask);
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}
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EXPORT_SYMBOL_GPL(tps6586x_set_bits);
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int tps6586x_clr_bits(struct device *dev, int reg, uint8_t bit_mask)
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{
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struct tps6586x *tps6586x = dev_to_tps6586x(dev);
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return regmap_update_bits(tps6586x->regmap, reg, bit_mask, 0);
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}
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EXPORT_SYMBOL_GPL(tps6586x_clr_bits);
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int tps6586x_update(struct device *dev, int reg, uint8_t val, uint8_t mask)
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{
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struct tps6586x *tps6586x = dev_to_tps6586x(dev);
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return regmap_update_bits(tps6586x->regmap, reg, mask, val);
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}
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EXPORT_SYMBOL_GPL(tps6586x_update);
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int tps6586x_irq_get_virq(struct device *dev, int irq)
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{
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struct tps6586x *tps6586x = dev_to_tps6586x(dev);
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return irq_create_mapping(tps6586x->irq_domain, irq);
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}
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EXPORT_SYMBOL_GPL(tps6586x_irq_get_virq);
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static int __remove_subdev(struct device *dev, void *unused)
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{
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platform_device_unregister(to_platform_device(dev));
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return 0;
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}
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static int tps6586x_remove_subdevs(struct tps6586x *tps6586x)
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{
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return device_for_each_child(tps6586x->dev, NULL, __remove_subdev);
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}
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static void tps6586x_irq_lock(struct irq_data *data)
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{
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struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
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mutex_lock(&tps6586x->irq_lock);
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}
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static void tps6586x_irq_enable(struct irq_data *irq_data)
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{
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struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
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unsigned int __irq = irq_data->hwirq;
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const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
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tps6586x->mask_reg[data->mask_reg] &= ~data->mask_mask;
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tps6586x->irq_en |= (1 << __irq);
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}
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static void tps6586x_irq_disable(struct irq_data *irq_data)
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{
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struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
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unsigned int __irq = irq_data->hwirq;
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const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
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tps6586x->mask_reg[data->mask_reg] |= data->mask_mask;
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tps6586x->irq_en &= ~(1 << __irq);
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}
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static void tps6586x_irq_sync_unlock(struct irq_data *data)
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{
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struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
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int i;
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for (i = 0; i < ARRAY_SIZE(tps6586x->mask_reg); i++) {
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int ret;
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ret = tps6586x_write(tps6586x->dev,
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TPS6586X_INT_MASK1 + i,
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tps6586x->mask_reg[i]);
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WARN_ON(ret);
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}
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mutex_unlock(&tps6586x->irq_lock);
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}
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#ifdef CONFIG_PM_SLEEP
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static int tps6586x_irq_set_wake(struct irq_data *irq_data, unsigned int on)
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{
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struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
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return irq_set_irq_wake(tps6586x->irq, on);
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}
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#else
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#define tps6586x_irq_set_wake NULL
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#endif
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static struct irq_chip tps6586x_irq_chip = {
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.name = "tps6586x",
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.irq_bus_lock = tps6586x_irq_lock,
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.irq_bus_sync_unlock = tps6586x_irq_sync_unlock,
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.irq_disable = tps6586x_irq_disable,
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.irq_enable = tps6586x_irq_enable,
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.irq_set_wake = tps6586x_irq_set_wake,
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};
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static int tps6586x_irq_map(struct irq_domain *h, unsigned int virq,
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irq_hw_number_t hw)
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{
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struct tps6586x *tps6586x = h->host_data;
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irq_set_chip_data(virq, tps6586x);
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irq_set_chip_and_handler(virq, &tps6586x_irq_chip, handle_simple_irq);
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irq_set_nested_thread(virq, 1);
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/* ARM needs us to explicitly flag the IRQ as valid
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* and will set them noprobe when we do so. */
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#ifdef CONFIG_ARM
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set_irq_flags(virq, IRQF_VALID);
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#else
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irq_set_noprobe(virq);
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#endif
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return 0;
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}
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static struct irq_domain_ops tps6586x_domain_ops = {
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.map = tps6586x_irq_map,
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.xlate = irq_domain_xlate_twocell,
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};
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static irqreturn_t tps6586x_irq(int irq, void *data)
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{
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struct tps6586x *tps6586x = data;
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u32 acks;
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int ret = 0;
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ret = tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1,
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sizeof(acks), (uint8_t *)&acks);
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if (ret < 0) {
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dev_err(tps6586x->dev, "failed to read interrupt status\n");
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return IRQ_NONE;
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}
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acks = le32_to_cpu(acks);
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while (acks) {
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int i = __ffs(acks);
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if (tps6586x->irq_en & (1 << i))
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handle_nested_irq(
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irq_find_mapping(tps6586x->irq_domain, i));
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acks &= ~(1 << i);
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}
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return IRQ_HANDLED;
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}
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static int tps6586x_irq_init(struct tps6586x *tps6586x, int irq,
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int irq_base)
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{
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int i, ret;
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u8 tmp[4];
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int new_irq_base;
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int irq_num = ARRAY_SIZE(tps6586x_irqs);
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tps6586x->irq = irq;
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mutex_init(&tps6586x->irq_lock);
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for (i = 0; i < 5; i++) {
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tps6586x->mask_reg[i] = 0xff;
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tps6586x_write(tps6586x->dev, TPS6586X_INT_MASK1 + i, 0xff);
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}
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tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1, sizeof(tmp), tmp);
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if (irq_base > 0) {
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new_irq_base = irq_alloc_descs(irq_base, 0, irq_num, -1);
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if (new_irq_base < 0) {
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dev_err(tps6586x->dev,
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"Failed to alloc IRQs: %d\n", new_irq_base);
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return new_irq_base;
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}
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} else {
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new_irq_base = 0;
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}
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tps6586x->irq_domain = irq_domain_add_simple(tps6586x->dev->of_node,
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irq_num, new_irq_base, &tps6586x_domain_ops,
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tps6586x);
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if (!tps6586x->irq_domain) {
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dev_err(tps6586x->dev, "Failed to create IRQ domain\n");
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return -ENOMEM;
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}
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ret = request_threaded_irq(irq, NULL, tps6586x_irq, IRQF_ONESHOT,
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"tps6586x", tps6586x);
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if (!ret)
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device_init_wakeup(tps6586x->dev, 1);
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return ret;
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}
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static int tps6586x_add_subdevs(struct tps6586x *tps6586x,
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struct tps6586x_platform_data *pdata)
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{
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struct tps6586x_subdev_info *subdev;
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struct platform_device *pdev;
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int i, ret = 0;
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for (i = 0; i < pdata->num_subdevs; i++) {
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subdev = &pdata->subdevs[i];
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pdev = platform_device_alloc(subdev->name, subdev->id);
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if (!pdev) {
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ret = -ENOMEM;
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goto failed;
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}
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pdev->dev.parent = tps6586x->dev;
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pdev->dev.platform_data = subdev->platform_data;
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pdev->dev.of_node = subdev->of_node;
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ret = platform_device_add(pdev);
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if (ret) {
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platform_device_put(pdev);
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goto failed;
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}
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}
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return 0;
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failed:
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tps6586x_remove_subdevs(tps6586x);
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return ret;
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}
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#ifdef CONFIG_OF
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static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *client)
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{
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struct device_node *np = client->dev.of_node;
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struct tps6586x_platform_data *pdata;
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pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
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if (!pdata) {
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dev_err(&client->dev, "Memory allocation failed\n");
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return NULL;
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}
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pdata->num_subdevs = 0;
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pdata->subdevs = NULL;
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pdata->gpio_base = -1;
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pdata->irq_base = -1;
|
|
pdata->pm_off = of_property_read_bool(np, "ti,system-power-controller");
|
|
|
|
return pdata;
|
|
}
|
|
|
|
static struct of_device_id tps6586x_of_match[] = {
|
|
{ .compatible = "ti,tps6586x", },
|
|
{ },
|
|
};
|
|
#else
|
|
static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *client)
|
|
{
|
|
return NULL;
|
|
}
|
|
#endif
|
|
|
|
static bool is_volatile_reg(struct device *dev, unsigned int reg)
|
|
{
|
|
/* Cache all interrupt mask register */
|
|
if ((reg >= TPS6586X_INT_MASK1) && (reg <= TPS6586X_INT_MASK5))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static const struct regmap_config tps6586x_regmap_config = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
.max_register = TPS6586X_MAX_REGISTER - 1,
|
|
.volatile_reg = is_volatile_reg,
|
|
.cache_type = REGCACHE_RBTREE,
|
|
};
|
|
|
|
static struct device *tps6586x_dev;
|
|
static void tps6586x_power_off(void)
|
|
{
|
|
if (tps6586x_clr_bits(tps6586x_dev, TPS6586X_SUPPLYENE, EXITSLREQ_BIT))
|
|
return;
|
|
|
|
tps6586x_set_bits(tps6586x_dev, TPS6586X_SUPPLYENE, SLEEP_MODE_BIT);
|
|
}
|
|
|
|
static int tps6586x_i2c_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct tps6586x_platform_data *pdata = dev_get_platdata(&client->dev);
|
|
struct tps6586x *tps6586x;
|
|
int ret;
|
|
|
|
if (!pdata && client->dev.of_node)
|
|
pdata = tps6586x_parse_dt(client);
|
|
|
|
if (!pdata) {
|
|
dev_err(&client->dev, "tps6586x requires platform data\n");
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
ret = i2c_smbus_read_byte_data(client, TPS6586X_VERSIONCRC);
|
|
if (ret < 0) {
|
|
dev_err(&client->dev, "Chip ID read failed: %d\n", ret);
|
|
return -EIO;
|
|
}
|
|
|
|
dev_info(&client->dev, "VERSIONCRC is %02x\n", ret);
|
|
|
|
tps6586x = devm_kzalloc(&client->dev, sizeof(*tps6586x), GFP_KERNEL);
|
|
if (tps6586x == NULL) {
|
|
dev_err(&client->dev, "memory for tps6586x alloc failed\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
tps6586x->client = client;
|
|
tps6586x->dev = &client->dev;
|
|
i2c_set_clientdata(client, tps6586x);
|
|
|
|
tps6586x->regmap = devm_regmap_init_i2c(client,
|
|
&tps6586x_regmap_config);
|
|
if (IS_ERR(tps6586x->regmap)) {
|
|
ret = PTR_ERR(tps6586x->regmap);
|
|
dev_err(&client->dev, "regmap init failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
|
|
if (client->irq) {
|
|
ret = tps6586x_irq_init(tps6586x, client->irq,
|
|
pdata->irq_base);
|
|
if (ret) {
|
|
dev_err(&client->dev, "IRQ init failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
ret = mfd_add_devices(tps6586x->dev, -1,
|
|
tps6586x_cell, ARRAY_SIZE(tps6586x_cell),
|
|
NULL, 0, tps6586x->irq_domain);
|
|
if (ret < 0) {
|
|
dev_err(&client->dev, "mfd_add_devices failed: %d\n", ret);
|
|
goto err_mfd_add;
|
|
}
|
|
|
|
ret = tps6586x_add_subdevs(tps6586x, pdata);
|
|
if (ret) {
|
|
dev_err(&client->dev, "add devices failed: %d\n", ret);
|
|
goto err_add_devs;
|
|
}
|
|
|
|
if (pdata->pm_off && !pm_power_off) {
|
|
tps6586x_dev = &client->dev;
|
|
pm_power_off = tps6586x_power_off;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_add_devs:
|
|
mfd_remove_devices(tps6586x->dev);
|
|
err_mfd_add:
|
|
if (client->irq)
|
|
free_irq(client->irq, tps6586x);
|
|
return ret;
|
|
}
|
|
|
|
static int tps6586x_i2c_remove(struct i2c_client *client)
|
|
{
|
|
struct tps6586x *tps6586x = i2c_get_clientdata(client);
|
|
|
|
tps6586x_remove_subdevs(tps6586x);
|
|
mfd_remove_devices(tps6586x->dev);
|
|
if (client->irq)
|
|
free_irq(client->irq, tps6586x);
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id tps6586x_id_table[] = {
|
|
{ "tps6586x", 0 },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, tps6586x_id_table);
|
|
|
|
static struct i2c_driver tps6586x_driver = {
|
|
.driver = {
|
|
.name = "tps6586x",
|
|
.owner = THIS_MODULE,
|
|
.of_match_table = of_match_ptr(tps6586x_of_match),
|
|
},
|
|
.probe = tps6586x_i2c_probe,
|
|
.remove = tps6586x_i2c_remove,
|
|
.id_table = tps6586x_id_table,
|
|
};
|
|
|
|
static int __init tps6586x_init(void)
|
|
{
|
|
return i2c_add_driver(&tps6586x_driver);
|
|
}
|
|
subsys_initcall(tps6586x_init);
|
|
|
|
static void __exit tps6586x_exit(void)
|
|
{
|
|
i2c_del_driver(&tps6586x_driver);
|
|
}
|
|
module_exit(tps6586x_exit);
|
|
|
|
MODULE_DESCRIPTION("TPS6586X core driver");
|
|
MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
|
|
MODULE_LICENSE("GPL");
|