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367 lines
8.5 KiB
367 lines
8.5 KiB
/* |
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* Driver for TPS65218 Integrated power management chipsets |
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* |
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* Copyright (C) 2014 Texas Instruments Incorporated - https://www.ti.com/ |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify 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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* This program is distributed "as is" WITHOUT ANY WARRANTY of any |
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* kind, whether expressed or implied; without even the implied warranty |
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License version 2 for more details. |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/device.h> |
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#include <linux/module.h> |
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#include <linux/platform_device.h> |
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#include <linux/init.h> |
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#include <linux/i2c.h> |
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#include <linux/slab.h> |
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#include <linux/regmap.h> |
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#include <linux/err.h> |
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#include <linux/of.h> |
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#include <linux/of_device.h> |
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#include <linux/irq.h> |
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#include <linux/interrupt.h> |
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#include <linux/mutex.h> |
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#include <linux/mfd/core.h> |
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#include <linux/mfd/tps65218.h> |
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#define TPS65218_PASSWORD_REGS_UNLOCK 0x7D |
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static const struct mfd_cell tps65218_cells[] = { |
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{ |
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.name = "tps65218-pwrbutton", |
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.of_compatible = "ti,tps65218-pwrbutton", |
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}, |
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{ |
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.name = "tps65218-gpio", |
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.of_compatible = "ti,tps65218-gpio", |
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}, |
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{ .name = "tps65218-regulator", }, |
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}; |
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/** |
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* tps65218_reg_write: Write a single tps65218 register. |
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* |
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* @tps: Device to write to. |
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* @reg: Register to write to. |
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* @val: Value to write. |
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* @level: Password protected level |
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*/ |
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int tps65218_reg_write(struct tps65218 *tps, unsigned int reg, |
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unsigned int val, unsigned int level) |
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{ |
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int ret; |
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unsigned int xor_reg_val; |
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switch (level) { |
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case TPS65218_PROTECT_NONE: |
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return regmap_write(tps->regmap, reg, val); |
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case TPS65218_PROTECT_L1: |
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xor_reg_val = reg ^ TPS65218_PASSWORD_REGS_UNLOCK; |
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ret = regmap_write(tps->regmap, TPS65218_REG_PASSWORD, |
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xor_reg_val); |
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if (ret < 0) |
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return ret; |
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return regmap_write(tps->regmap, reg, val); |
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default: |
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return -EINVAL; |
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} |
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} |
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EXPORT_SYMBOL_GPL(tps65218_reg_write); |
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/** |
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* tps65218_update_bits: Modify bits w.r.t mask, val and level. |
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* |
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* @tps: Device to write to. |
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* @reg: Register to read-write to. |
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* @mask: Mask. |
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* @val: Value to write. |
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* @level: Password protected level |
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*/ |
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static int tps65218_update_bits(struct tps65218 *tps, unsigned int reg, |
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unsigned int mask, unsigned int val, unsigned int level) |
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{ |
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int ret; |
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unsigned int data; |
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ret = regmap_read(tps->regmap, reg, &data); |
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if (ret) { |
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dev_err(tps->dev, "Read from reg 0x%x failed\n", reg); |
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return ret; |
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} |
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data &= ~mask; |
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data |= val & mask; |
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mutex_lock(&tps->tps_lock); |
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ret = tps65218_reg_write(tps, reg, data, level); |
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if (ret) |
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dev_err(tps->dev, "Write for reg 0x%x failed\n", reg); |
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mutex_unlock(&tps->tps_lock); |
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return ret; |
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} |
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int tps65218_set_bits(struct tps65218 *tps, unsigned int reg, |
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unsigned int mask, unsigned int val, unsigned int level) |
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{ |
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return tps65218_update_bits(tps, reg, mask, val, level); |
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} |
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EXPORT_SYMBOL_GPL(tps65218_set_bits); |
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int tps65218_clear_bits(struct tps65218 *tps, unsigned int reg, |
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unsigned int mask, unsigned int level) |
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{ |
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return tps65218_update_bits(tps, reg, mask, 0, level); |
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} |
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EXPORT_SYMBOL_GPL(tps65218_clear_bits); |
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static const struct regmap_range tps65218_yes_ranges[] = { |
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regmap_reg_range(TPS65218_REG_INT1, TPS65218_REG_INT2), |
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regmap_reg_range(TPS65218_REG_STATUS, TPS65218_REG_STATUS), |
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}; |
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static const struct regmap_access_table tps65218_volatile_table = { |
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.yes_ranges = tps65218_yes_ranges, |
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.n_yes_ranges = ARRAY_SIZE(tps65218_yes_ranges), |
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}; |
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static const struct regmap_config tps65218_regmap_config = { |
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.reg_bits = 8, |
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.val_bits = 8, |
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.cache_type = REGCACHE_RBTREE, |
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.volatile_table = &tps65218_volatile_table, |
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}; |
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static const struct regmap_irq tps65218_irqs[] = { |
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/* INT1 IRQs */ |
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[TPS65218_PRGC_IRQ] = { |
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.mask = TPS65218_INT1_PRGC, |
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}, |
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[TPS65218_CC_AQC_IRQ] = { |
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.mask = TPS65218_INT1_CC_AQC, |
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}, |
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[TPS65218_HOT_IRQ] = { |
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.mask = TPS65218_INT1_HOT, |
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}, |
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[TPS65218_PB_IRQ] = { |
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.mask = TPS65218_INT1_PB, |
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}, |
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[TPS65218_AC_IRQ] = { |
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.mask = TPS65218_INT1_AC, |
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}, |
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[TPS65218_VPRG_IRQ] = { |
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.mask = TPS65218_INT1_VPRG, |
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}, |
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[TPS65218_INVALID1_IRQ] = { |
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}, |
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[TPS65218_INVALID2_IRQ] = { |
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}, |
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/* INT2 IRQs*/ |
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[TPS65218_LS1_I_IRQ] = { |
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.mask = TPS65218_INT2_LS1_I, |
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.reg_offset = 1, |
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}, |
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[TPS65218_LS2_I_IRQ] = { |
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.mask = TPS65218_INT2_LS2_I, |
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.reg_offset = 1, |
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}, |
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[TPS65218_LS3_I_IRQ] = { |
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.mask = TPS65218_INT2_LS3_I, |
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.reg_offset = 1, |
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}, |
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[TPS65218_LS1_F_IRQ] = { |
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.mask = TPS65218_INT2_LS1_F, |
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.reg_offset = 1, |
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}, |
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[TPS65218_LS2_F_IRQ] = { |
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.mask = TPS65218_INT2_LS2_F, |
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.reg_offset = 1, |
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}, |
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[TPS65218_LS3_F_IRQ] = { |
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.mask = TPS65218_INT2_LS3_F, |
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.reg_offset = 1, |
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}, |
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[TPS65218_INVALID3_IRQ] = { |
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}, |
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[TPS65218_INVALID4_IRQ] = { |
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}, |
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}; |
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static struct regmap_irq_chip tps65218_irq_chip = { |
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.name = "tps65218", |
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.irqs = tps65218_irqs, |
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.num_irqs = ARRAY_SIZE(tps65218_irqs), |
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.num_regs = 2, |
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.mask_base = TPS65218_REG_INT_MASK1, |
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.status_base = TPS65218_REG_INT1, |
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}; |
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static const struct of_device_id of_tps65218_match_table[] = { |
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{ .compatible = "ti,tps65218", }, |
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{} |
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}; |
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MODULE_DEVICE_TABLE(of, of_tps65218_match_table); |
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static int tps65218_voltage_set_strict(struct tps65218 *tps) |
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{ |
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u32 strict; |
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if (of_property_read_u32(tps->dev->of_node, |
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"ti,strict-supply-voltage-supervision", |
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&strict)) |
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return 0; |
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if (strict != 0 && strict != 1) { |
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dev_err(tps->dev, |
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"Invalid ti,strict-supply-voltage-supervision value\n"); |
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return -EINVAL; |
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} |
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tps65218_update_bits(tps, TPS65218_REG_CONFIG1, |
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TPS65218_CONFIG1_STRICT, |
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strict ? TPS65218_CONFIG1_STRICT : 0, |
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TPS65218_PROTECT_L1); |
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return 0; |
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} |
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static int tps65218_voltage_set_uv_hyst(struct tps65218 *tps) |
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{ |
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u32 hyst; |
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if (of_property_read_u32(tps->dev->of_node, |
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"ti,under-voltage-hyst-microvolt", &hyst)) |
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return 0; |
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if (hyst != 400000 && hyst != 200000) { |
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dev_err(tps->dev, |
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"Invalid ti,under-voltage-hyst-microvolt value\n"); |
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return -EINVAL; |
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} |
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tps65218_update_bits(tps, TPS65218_REG_CONFIG2, |
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TPS65218_CONFIG2_UVLOHYS, |
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hyst == 400000 ? TPS65218_CONFIG2_UVLOHYS : 0, |
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TPS65218_PROTECT_L1); |
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return 0; |
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} |
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static int tps65218_voltage_set_uvlo(struct tps65218 *tps) |
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{ |
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u32 uvlo; |
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int uvloval; |
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if (of_property_read_u32(tps->dev->of_node, |
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"ti,under-voltage-limit-microvolt", &uvlo)) |
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return 0; |
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switch (uvlo) { |
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case 2750000: |
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uvloval = TPS65218_CONFIG1_UVLO_2750000; |
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break; |
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case 2950000: |
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uvloval = TPS65218_CONFIG1_UVLO_2950000; |
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break; |
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case 3250000: |
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uvloval = TPS65218_CONFIG1_UVLO_3250000; |
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break; |
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case 3350000: |
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uvloval = TPS65218_CONFIG1_UVLO_3350000; |
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break; |
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default: |
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dev_err(tps->dev, |
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"Invalid ti,under-voltage-limit-microvolt value\n"); |
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return -EINVAL; |
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} |
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tps65218_update_bits(tps, TPS65218_REG_CONFIG1, |
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TPS65218_CONFIG1_UVLO_MASK, uvloval, |
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TPS65218_PROTECT_L1); |
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return 0; |
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} |
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static int tps65218_probe(struct i2c_client *client, |
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const struct i2c_device_id *ids) |
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{ |
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struct tps65218 *tps; |
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int ret; |
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unsigned int chipid; |
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tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL); |
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if (!tps) |
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return -ENOMEM; |
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i2c_set_clientdata(client, tps); |
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tps->dev = &client->dev; |
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tps->irq = client->irq; |
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tps->regmap = devm_regmap_init_i2c(client, &tps65218_regmap_config); |
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if (IS_ERR(tps->regmap)) { |
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ret = PTR_ERR(tps->regmap); |
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dev_err(tps->dev, "Failed to allocate register map: %d\n", |
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ret); |
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return ret; |
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} |
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mutex_init(&tps->tps_lock); |
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ret = devm_regmap_add_irq_chip(&client->dev, tps->regmap, tps->irq, |
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IRQF_ONESHOT, 0, &tps65218_irq_chip, |
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&tps->irq_data); |
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if (ret < 0) |
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return ret; |
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ret = regmap_read(tps->regmap, TPS65218_REG_CHIPID, &chipid); |
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if (ret) { |
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dev_err(tps->dev, "Failed to read chipid: %d\n", ret); |
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return ret; |
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} |
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tps->rev = chipid & TPS65218_CHIPID_REV_MASK; |
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ret = tps65218_voltage_set_strict(tps); |
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if (ret) |
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return ret; |
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ret = tps65218_voltage_set_uvlo(tps); |
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if (ret) |
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return ret; |
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ret = tps65218_voltage_set_uv_hyst(tps); |
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if (ret) |
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return ret; |
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ret = mfd_add_devices(tps->dev, PLATFORM_DEVID_AUTO, tps65218_cells, |
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ARRAY_SIZE(tps65218_cells), NULL, 0, |
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regmap_irq_get_domain(tps->irq_data)); |
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return ret; |
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} |
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static const struct i2c_device_id tps65218_id_table[] = { |
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{ "tps65218", TPS65218 }, |
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{ }, |
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}; |
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MODULE_DEVICE_TABLE(i2c, tps65218_id_table); |
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static struct i2c_driver tps65218_driver = { |
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.driver = { |
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.name = "tps65218", |
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.of_match_table = of_tps65218_match_table, |
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}, |
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.probe = tps65218_probe, |
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.id_table = tps65218_id_table, |
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}; |
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module_i2c_driver(tps65218_driver); |
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MODULE_AUTHOR("J Keerthy <[email protected]>"); |
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MODULE_DESCRIPTION("TPS65218 chip family multi-function driver"); |
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MODULE_LICENSE("GPL v2");
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