Abhijeet Dharmapurikar | cbdb53e | 2011-04-05 14:40:52 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2011, Code Aurora Forum. All rights reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 and |
| 6 | * only version 2 as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | */ |
| 13 | |
| 14 | #define pr_fmt(fmt) "%s: " fmt, __func__ |
| 15 | |
| 16 | #include <linux/kernel.h> |
Stephen Boyd | bc866fc | 2014-02-26 10:59:19 -0800 | [diff] [blame] | 17 | #include <linux/interrupt.h> |
Stephen Boyd | cced354 | 2014-02-26 10:59:20 -0800 | [diff] [blame] | 18 | #include <linux/irqchip/chained_irq.h> |
Stephen Boyd | bc866fc | 2014-02-26 10:59:19 -0800 | [diff] [blame] | 19 | #include <linux/irq.h> |
Stephen Boyd | dc1a95c | 2014-02-26 10:59:21 -0800 | [diff] [blame] | 20 | #include <linux/irqdomain.h> |
Jingoo Han | ef310f4 | 2013-08-20 16:01:26 +0900 | [diff] [blame] | 21 | #include <linux/module.h> |
Abhijeet Dharmapurikar | cbdb53e | 2011-04-05 14:40:52 -0700 | [diff] [blame] | 22 | #include <linux/platform_device.h> |
| 23 | #include <linux/slab.h> |
Abhijeet Dharmapurikar | c013f0a | 2011-04-05 14:40:53 -0700 | [diff] [blame] | 24 | #include <linux/err.h> |
David Brown | ce44bf5 | 2013-03-12 11:41:54 -0700 | [diff] [blame] | 25 | #include <linux/ssbi.h> |
Stephen Boyd | e7b81fca | 2014-02-26 10:59:23 -0800 | [diff] [blame^] | 26 | #include <linux/regmap.h> |
Stephen Boyd | dc1a95c | 2014-02-26 10:59:21 -0800 | [diff] [blame] | 27 | #include <linux/of_platform.h> |
Abhijeet Dharmapurikar | cbdb53e | 2011-04-05 14:40:52 -0700 | [diff] [blame] | 28 | #include <linux/mfd/core.h> |
Abhijeet Dharmapurikar | cbdb53e | 2011-04-05 14:40:52 -0700 | [diff] [blame] | 29 | #include <linux/mfd/pm8xxx/core.h> |
Stephen Boyd | bc866fc | 2014-02-26 10:59:19 -0800 | [diff] [blame] | 30 | |
| 31 | #define SSBI_REG_ADDR_IRQ_BASE 0x1BB |
| 32 | |
| 33 | #define SSBI_REG_ADDR_IRQ_ROOT (SSBI_REG_ADDR_IRQ_BASE + 0) |
| 34 | #define SSBI_REG_ADDR_IRQ_M_STATUS1 (SSBI_REG_ADDR_IRQ_BASE + 1) |
| 35 | #define SSBI_REG_ADDR_IRQ_M_STATUS2 (SSBI_REG_ADDR_IRQ_BASE + 2) |
| 36 | #define SSBI_REG_ADDR_IRQ_M_STATUS3 (SSBI_REG_ADDR_IRQ_BASE + 3) |
| 37 | #define SSBI_REG_ADDR_IRQ_M_STATUS4 (SSBI_REG_ADDR_IRQ_BASE + 4) |
| 38 | #define SSBI_REG_ADDR_IRQ_BLK_SEL (SSBI_REG_ADDR_IRQ_BASE + 5) |
| 39 | #define SSBI_REG_ADDR_IRQ_IT_STATUS (SSBI_REG_ADDR_IRQ_BASE + 6) |
| 40 | #define SSBI_REG_ADDR_IRQ_CONFIG (SSBI_REG_ADDR_IRQ_BASE + 7) |
| 41 | #define SSBI_REG_ADDR_IRQ_RT_STATUS (SSBI_REG_ADDR_IRQ_BASE + 8) |
| 42 | |
| 43 | #define PM_IRQF_LVL_SEL 0x01 /* level select */ |
| 44 | #define PM_IRQF_MASK_FE 0x02 /* mask falling edge */ |
| 45 | #define PM_IRQF_MASK_RE 0x04 /* mask rising edge */ |
| 46 | #define PM_IRQF_CLR 0x08 /* clear interrupt */ |
| 47 | #define PM_IRQF_BITS_MASK 0x70 |
| 48 | #define PM_IRQF_BITS_SHIFT 4 |
| 49 | #define PM_IRQF_WRITE 0x80 |
| 50 | |
| 51 | #define PM_IRQF_MASK_ALL (PM_IRQF_MASK_FE | \ |
| 52 | PM_IRQF_MASK_RE) |
Abhijeet Dharmapurikar | cbdb53e | 2011-04-05 14:40:52 -0700 | [diff] [blame] | 53 | |
| 54 | #define REG_HWREV 0x002 /* PMIC4 revision */ |
| 55 | #define REG_HWREV_2 0x0E8 /* PMIC4 revision 2 */ |
| 56 | |
Stephen Boyd | dc1a95c | 2014-02-26 10:59:21 -0800 | [diff] [blame] | 57 | #define PM8921_NR_IRQS 256 |
| 58 | |
Stephen Boyd | bc866fc | 2014-02-26 10:59:19 -0800 | [diff] [blame] | 59 | struct pm_irq_chip { |
| 60 | struct device *dev; |
Stephen Boyd | e7b81fca | 2014-02-26 10:59:23 -0800 | [diff] [blame^] | 61 | struct regmap *regmap; |
Stephen Boyd | bc866fc | 2014-02-26 10:59:19 -0800 | [diff] [blame] | 62 | spinlock_t pm_irq_lock; |
Stephen Boyd | dc1a95c | 2014-02-26 10:59:21 -0800 | [diff] [blame] | 63 | struct irq_domain *irqdomain; |
Stephen Boyd | bc866fc | 2014-02-26 10:59:19 -0800 | [diff] [blame] | 64 | unsigned int num_irqs; |
| 65 | unsigned int num_blocks; |
| 66 | unsigned int num_masters; |
| 67 | u8 config[0]; |
| 68 | }; |
| 69 | |
Abhijeet Dharmapurikar | cbdb53e | 2011-04-05 14:40:52 -0700 | [diff] [blame] | 70 | struct pm8921 { |
| 71 | struct device *dev; |
Abhijeet Dharmapurikar | c013f0a | 2011-04-05 14:40:53 -0700 | [diff] [blame] | 72 | struct pm_irq_chip *irq_chip; |
Abhijeet Dharmapurikar | cbdb53e | 2011-04-05 14:40:52 -0700 | [diff] [blame] | 73 | }; |
| 74 | |
Stephen Boyd | e7b81fca | 2014-02-26 10:59:23 -0800 | [diff] [blame^] | 75 | static int pm8xxx_read_block_irq(struct pm_irq_chip *chip, unsigned int bp, |
| 76 | unsigned int *ip) |
Stephen Boyd | bc866fc | 2014-02-26 10:59:19 -0800 | [diff] [blame] | 77 | { |
| 78 | int rc; |
| 79 | |
| 80 | spin_lock(&chip->pm_irq_lock); |
Stephen Boyd | e7b81fca | 2014-02-26 10:59:23 -0800 | [diff] [blame^] | 81 | rc = regmap_write(chip->regmap, SSBI_REG_ADDR_IRQ_BLK_SEL, bp); |
Stephen Boyd | bc866fc | 2014-02-26 10:59:19 -0800 | [diff] [blame] | 82 | if (rc) { |
| 83 | pr_err("Failed Selecting Block %d rc=%d\n", bp, rc); |
| 84 | goto bail; |
| 85 | } |
| 86 | |
Stephen Boyd | e7b81fca | 2014-02-26 10:59:23 -0800 | [diff] [blame^] | 87 | rc = regmap_read(chip->regmap, SSBI_REG_ADDR_IRQ_IT_STATUS, ip); |
Stephen Boyd | bc866fc | 2014-02-26 10:59:19 -0800 | [diff] [blame] | 88 | if (rc) |
| 89 | pr_err("Failed Reading Status rc=%d\n", rc); |
| 90 | bail: |
| 91 | spin_unlock(&chip->pm_irq_lock); |
| 92 | return rc; |
| 93 | } |
| 94 | |
Stephen Boyd | e7b81fca | 2014-02-26 10:59:23 -0800 | [diff] [blame^] | 95 | static int |
| 96 | pm8xxx_config_irq(struct pm_irq_chip *chip, unsigned int bp, unsigned int cp) |
Stephen Boyd | bc866fc | 2014-02-26 10:59:19 -0800 | [diff] [blame] | 97 | { |
| 98 | int rc; |
| 99 | |
| 100 | spin_lock(&chip->pm_irq_lock); |
Stephen Boyd | e7b81fca | 2014-02-26 10:59:23 -0800 | [diff] [blame^] | 101 | rc = regmap_write(chip->regmap, SSBI_REG_ADDR_IRQ_BLK_SEL, bp); |
Stephen Boyd | bc866fc | 2014-02-26 10:59:19 -0800 | [diff] [blame] | 102 | if (rc) { |
| 103 | pr_err("Failed Selecting Block %d rc=%d\n", bp, rc); |
| 104 | goto bail; |
| 105 | } |
| 106 | |
| 107 | cp |= PM_IRQF_WRITE; |
Stephen Boyd | e7b81fca | 2014-02-26 10:59:23 -0800 | [diff] [blame^] | 108 | rc = regmap_write(chip->regmap, SSBI_REG_ADDR_IRQ_CONFIG, cp); |
Stephen Boyd | bc866fc | 2014-02-26 10:59:19 -0800 | [diff] [blame] | 109 | if (rc) |
| 110 | pr_err("Failed Configuring IRQ rc=%d\n", rc); |
| 111 | bail: |
| 112 | spin_unlock(&chip->pm_irq_lock); |
| 113 | return rc; |
| 114 | } |
| 115 | |
| 116 | static int pm8xxx_irq_block_handler(struct pm_irq_chip *chip, int block) |
| 117 | { |
| 118 | int pmirq, irq, i, ret = 0; |
Stephen Boyd | e7b81fca | 2014-02-26 10:59:23 -0800 | [diff] [blame^] | 119 | unsigned int bits; |
Stephen Boyd | bc866fc | 2014-02-26 10:59:19 -0800 | [diff] [blame] | 120 | |
| 121 | ret = pm8xxx_read_block_irq(chip, block, &bits); |
| 122 | if (ret) { |
| 123 | pr_err("Failed reading %d block ret=%d", block, ret); |
| 124 | return ret; |
| 125 | } |
| 126 | if (!bits) { |
| 127 | pr_err("block bit set in master but no irqs: %d", block); |
| 128 | return 0; |
| 129 | } |
| 130 | |
| 131 | /* Check IRQ bits */ |
| 132 | for (i = 0; i < 8; i++) { |
| 133 | if (bits & (1 << i)) { |
| 134 | pmirq = block * 8 + i; |
Stephen Boyd | dc1a95c | 2014-02-26 10:59:21 -0800 | [diff] [blame] | 135 | irq = irq_find_mapping(chip->irqdomain, pmirq); |
Stephen Boyd | bc866fc | 2014-02-26 10:59:19 -0800 | [diff] [blame] | 136 | generic_handle_irq(irq); |
| 137 | } |
| 138 | } |
| 139 | return 0; |
| 140 | } |
| 141 | |
| 142 | static int pm8xxx_irq_master_handler(struct pm_irq_chip *chip, int master) |
| 143 | { |
Stephen Boyd | e7b81fca | 2014-02-26 10:59:23 -0800 | [diff] [blame^] | 144 | unsigned int blockbits; |
Stephen Boyd | bc866fc | 2014-02-26 10:59:19 -0800 | [diff] [blame] | 145 | int block_number, i, ret = 0; |
| 146 | |
Stephen Boyd | e7b81fca | 2014-02-26 10:59:23 -0800 | [diff] [blame^] | 147 | ret = regmap_read(chip->regmap, SSBI_REG_ADDR_IRQ_M_STATUS1 + master, |
| 148 | &blockbits); |
Stephen Boyd | bc866fc | 2014-02-26 10:59:19 -0800 | [diff] [blame] | 149 | if (ret) { |
| 150 | pr_err("Failed to read master %d ret=%d\n", master, ret); |
| 151 | return ret; |
| 152 | } |
| 153 | if (!blockbits) { |
| 154 | pr_err("master bit set in root but no blocks: %d", master); |
| 155 | return 0; |
| 156 | } |
| 157 | |
| 158 | for (i = 0; i < 8; i++) |
| 159 | if (blockbits & (1 << i)) { |
| 160 | block_number = master * 8 + i; /* block # */ |
| 161 | ret |= pm8xxx_irq_block_handler(chip, block_number); |
| 162 | } |
| 163 | return ret; |
| 164 | } |
| 165 | |
| 166 | static void pm8xxx_irq_handler(unsigned int irq, struct irq_desc *desc) |
| 167 | { |
| 168 | struct pm_irq_chip *chip = irq_desc_get_handler_data(desc); |
| 169 | struct irq_chip *irq_chip = irq_desc_get_chip(desc); |
Stephen Boyd | e7b81fca | 2014-02-26 10:59:23 -0800 | [diff] [blame^] | 170 | unsigned int root; |
Stephen Boyd | bc866fc | 2014-02-26 10:59:19 -0800 | [diff] [blame] | 171 | int i, ret, masters = 0; |
| 172 | |
Stephen Boyd | cced354 | 2014-02-26 10:59:20 -0800 | [diff] [blame] | 173 | chained_irq_enter(irq_chip, desc); |
| 174 | |
Stephen Boyd | e7b81fca | 2014-02-26 10:59:23 -0800 | [diff] [blame^] | 175 | ret = regmap_read(chip->regmap, SSBI_REG_ADDR_IRQ_ROOT, &root); |
Stephen Boyd | bc866fc | 2014-02-26 10:59:19 -0800 | [diff] [blame] | 176 | if (ret) { |
| 177 | pr_err("Can't read root status ret=%d\n", ret); |
| 178 | return; |
| 179 | } |
| 180 | |
| 181 | /* on pm8xxx series masters start from bit 1 of the root */ |
| 182 | masters = root >> 1; |
| 183 | |
| 184 | /* Read allowed masters for blocks. */ |
| 185 | for (i = 0; i < chip->num_masters; i++) |
| 186 | if (masters & (1 << i)) |
| 187 | pm8xxx_irq_master_handler(chip, i); |
| 188 | |
Stephen Boyd | cced354 | 2014-02-26 10:59:20 -0800 | [diff] [blame] | 189 | chained_irq_exit(irq_chip, desc); |
Stephen Boyd | bc866fc | 2014-02-26 10:59:19 -0800 | [diff] [blame] | 190 | } |
| 191 | |
| 192 | static void pm8xxx_irq_mask_ack(struct irq_data *d) |
| 193 | { |
| 194 | struct pm_irq_chip *chip = irq_data_get_irq_chip_data(d); |
Stephen Boyd | dc1a95c | 2014-02-26 10:59:21 -0800 | [diff] [blame] | 195 | unsigned int pmirq = irqd_to_hwirq(d); |
| 196 | int irq_bit; |
Stephen Boyd | bc866fc | 2014-02-26 10:59:19 -0800 | [diff] [blame] | 197 | u8 block, config; |
| 198 | |
| 199 | block = pmirq / 8; |
Stephen Boyd | bc866fc | 2014-02-26 10:59:19 -0800 | [diff] [blame] | 200 | irq_bit = pmirq % 8; |
| 201 | |
| 202 | config = chip->config[pmirq] | PM_IRQF_MASK_ALL | PM_IRQF_CLR; |
| 203 | pm8xxx_config_irq(chip, block, config); |
| 204 | } |
| 205 | |
| 206 | static void pm8xxx_irq_unmask(struct irq_data *d) |
| 207 | { |
| 208 | struct pm_irq_chip *chip = irq_data_get_irq_chip_data(d); |
Stephen Boyd | dc1a95c | 2014-02-26 10:59:21 -0800 | [diff] [blame] | 209 | unsigned int pmirq = irqd_to_hwirq(d); |
| 210 | int irq_bit; |
Stephen Boyd | bc866fc | 2014-02-26 10:59:19 -0800 | [diff] [blame] | 211 | u8 block, config; |
| 212 | |
| 213 | block = pmirq / 8; |
Stephen Boyd | bc866fc | 2014-02-26 10:59:19 -0800 | [diff] [blame] | 214 | irq_bit = pmirq % 8; |
| 215 | |
| 216 | config = chip->config[pmirq]; |
| 217 | pm8xxx_config_irq(chip, block, config); |
| 218 | } |
| 219 | |
| 220 | static int pm8xxx_irq_set_type(struct irq_data *d, unsigned int flow_type) |
| 221 | { |
| 222 | struct pm_irq_chip *chip = irq_data_get_irq_chip_data(d); |
Stephen Boyd | dc1a95c | 2014-02-26 10:59:21 -0800 | [diff] [blame] | 223 | unsigned int pmirq = irqd_to_hwirq(d); |
| 224 | int irq_bit; |
Stephen Boyd | bc866fc | 2014-02-26 10:59:19 -0800 | [diff] [blame] | 225 | u8 block, config; |
| 226 | |
| 227 | block = pmirq / 8; |
Stephen Boyd | bc866fc | 2014-02-26 10:59:19 -0800 | [diff] [blame] | 228 | irq_bit = pmirq % 8; |
| 229 | |
| 230 | chip->config[pmirq] = (irq_bit << PM_IRQF_BITS_SHIFT) |
| 231 | | PM_IRQF_MASK_ALL; |
| 232 | if (flow_type & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING)) { |
| 233 | if (flow_type & IRQF_TRIGGER_RISING) |
| 234 | chip->config[pmirq] &= ~PM_IRQF_MASK_RE; |
| 235 | if (flow_type & IRQF_TRIGGER_FALLING) |
| 236 | chip->config[pmirq] &= ~PM_IRQF_MASK_FE; |
| 237 | } else { |
| 238 | chip->config[pmirq] |= PM_IRQF_LVL_SEL; |
| 239 | |
| 240 | if (flow_type & IRQF_TRIGGER_HIGH) |
| 241 | chip->config[pmirq] &= ~PM_IRQF_MASK_RE; |
| 242 | else |
| 243 | chip->config[pmirq] &= ~PM_IRQF_MASK_FE; |
| 244 | } |
| 245 | |
| 246 | config = chip->config[pmirq] | PM_IRQF_CLR; |
| 247 | return pm8xxx_config_irq(chip, block, config); |
| 248 | } |
| 249 | |
| 250 | static int pm8xxx_irq_set_wake(struct irq_data *d, unsigned int on) |
| 251 | { |
| 252 | return 0; |
| 253 | } |
| 254 | |
| 255 | static struct irq_chip pm8xxx_irq_chip = { |
| 256 | .name = "pm8xxx", |
| 257 | .irq_mask_ack = pm8xxx_irq_mask_ack, |
| 258 | .irq_unmask = pm8xxx_irq_unmask, |
| 259 | .irq_set_type = pm8xxx_irq_set_type, |
| 260 | .irq_set_wake = pm8xxx_irq_set_wake, |
| 261 | .flags = IRQCHIP_MASK_ON_SUSPEND, |
| 262 | }; |
| 263 | |
| 264 | /** |
| 265 | * pm8xxx_get_irq_stat - get the status of the irq line |
| 266 | * @chip: pointer to identify a pmic irq controller |
| 267 | * @irq: the irq number |
| 268 | * |
| 269 | * The pm8xxx gpio and mpp rely on the interrupt block to read |
| 270 | * the values on their pins. This function is to facilitate reading |
| 271 | * the status of a gpio or an mpp line. The caller has to convert the |
| 272 | * gpio number to irq number. |
| 273 | * |
| 274 | * RETURNS: |
| 275 | * an int indicating the value read on that line |
| 276 | */ |
| 277 | static int pm8xxx_get_irq_stat(struct pm_irq_chip *chip, int irq) |
| 278 | { |
| 279 | int pmirq, rc; |
Stephen Boyd | e7b81fca | 2014-02-26 10:59:23 -0800 | [diff] [blame^] | 280 | unsigned int block, bits, bit; |
Stephen Boyd | bc866fc | 2014-02-26 10:59:19 -0800 | [diff] [blame] | 281 | unsigned long flags; |
Stephen Boyd | dc1a95c | 2014-02-26 10:59:21 -0800 | [diff] [blame] | 282 | struct irq_data *irq_data = irq_get_irq_data(irq); |
Stephen Boyd | bc866fc | 2014-02-26 10:59:19 -0800 | [diff] [blame] | 283 | |
Stephen Boyd | dc1a95c | 2014-02-26 10:59:21 -0800 | [diff] [blame] | 284 | pmirq = irq_data->hwirq; |
Stephen Boyd | bc866fc | 2014-02-26 10:59:19 -0800 | [diff] [blame] | 285 | |
| 286 | block = pmirq / 8; |
| 287 | bit = pmirq % 8; |
| 288 | |
| 289 | spin_lock_irqsave(&chip->pm_irq_lock, flags); |
| 290 | |
Stephen Boyd | e7b81fca | 2014-02-26 10:59:23 -0800 | [diff] [blame^] | 291 | rc = regmap_write(chip->regmap, SSBI_REG_ADDR_IRQ_BLK_SEL, block); |
Stephen Boyd | bc866fc | 2014-02-26 10:59:19 -0800 | [diff] [blame] | 292 | if (rc) { |
| 293 | pr_err("Failed Selecting block irq=%d pmirq=%d blk=%d rc=%d\n", |
| 294 | irq, pmirq, block, rc); |
| 295 | goto bail_out; |
| 296 | } |
| 297 | |
Stephen Boyd | e7b81fca | 2014-02-26 10:59:23 -0800 | [diff] [blame^] | 298 | rc = regmap_read(chip->regmap, SSBI_REG_ADDR_IRQ_RT_STATUS, &bits); |
Stephen Boyd | bc866fc | 2014-02-26 10:59:19 -0800 | [diff] [blame] | 299 | if (rc) { |
| 300 | pr_err("Failed Configuring irq=%d pmirq=%d blk=%d rc=%d\n", |
| 301 | irq, pmirq, block, rc); |
| 302 | goto bail_out; |
| 303 | } |
| 304 | |
| 305 | rc = (bits & (1 << bit)) ? 1 : 0; |
| 306 | |
| 307 | bail_out: |
| 308 | spin_unlock_irqrestore(&chip->pm_irq_lock, flags); |
| 309 | |
| 310 | return rc; |
| 311 | } |
| 312 | |
Stephen Boyd | dc1a95c | 2014-02-26 10:59:21 -0800 | [diff] [blame] | 313 | static struct lock_class_key pm8xxx_irq_lock_class; |
| 314 | |
| 315 | static int pm8xxx_irq_domain_map(struct irq_domain *d, unsigned int irq, |
| 316 | irq_hw_number_t hwirq) |
Stephen Boyd | bc866fc | 2014-02-26 10:59:19 -0800 | [diff] [blame] | 317 | { |
Stephen Boyd | dc1a95c | 2014-02-26 10:59:21 -0800 | [diff] [blame] | 318 | struct pm_irq_chip *chip = d->host_data; |
Stephen Boyd | bc866fc | 2014-02-26 10:59:19 -0800 | [diff] [blame] | 319 | |
Stephen Boyd | dc1a95c | 2014-02-26 10:59:21 -0800 | [diff] [blame] | 320 | irq_set_lockdep_class(irq, &pm8xxx_irq_lock_class); |
| 321 | irq_set_chip_and_handler(irq, &pm8xxx_irq_chip, handle_level_irq); |
| 322 | irq_set_chip_data(irq, chip); |
Stephen Boyd | bc866fc | 2014-02-26 10:59:19 -0800 | [diff] [blame] | 323 | #ifdef CONFIG_ARM |
Stephen Boyd | dc1a95c | 2014-02-26 10:59:21 -0800 | [diff] [blame] | 324 | set_irq_flags(irq, IRQF_VALID); |
Stephen Boyd | bc866fc | 2014-02-26 10:59:19 -0800 | [diff] [blame] | 325 | #else |
Stephen Boyd | dc1a95c | 2014-02-26 10:59:21 -0800 | [diff] [blame] | 326 | irq_set_noprobe(irq); |
Stephen Boyd | bc866fc | 2014-02-26 10:59:19 -0800 | [diff] [blame] | 327 | #endif |
Stephen Boyd | bc866fc | 2014-02-26 10:59:19 -0800 | [diff] [blame] | 328 | return 0; |
| 329 | } |
| 330 | |
Stephen Boyd | dc1a95c | 2014-02-26 10:59:21 -0800 | [diff] [blame] | 331 | static const struct irq_domain_ops pm8xxx_irq_domain_ops = { |
| 332 | .xlate = irq_domain_xlate_twocell, |
| 333 | .map = pm8xxx_irq_domain_map, |
| 334 | }; |
| 335 | |
Abhijeet Dharmapurikar | cbdb53e | 2011-04-05 14:40:52 -0700 | [diff] [blame] | 336 | static int pm8921_readb(const struct device *dev, u16 addr, u8 *val) |
| 337 | { |
| 338 | const struct pm8xxx_drvdata *pm8921_drvdata = dev_get_drvdata(dev); |
| 339 | const struct pm8921 *pmic = pm8921_drvdata->pm_chip_data; |
| 340 | |
David Brown | ce44bf5 | 2013-03-12 11:41:54 -0700 | [diff] [blame] | 341 | return ssbi_read(pmic->dev->parent, addr, val, 1); |
Abhijeet Dharmapurikar | cbdb53e | 2011-04-05 14:40:52 -0700 | [diff] [blame] | 342 | } |
| 343 | |
| 344 | static int pm8921_writeb(const struct device *dev, u16 addr, u8 val) |
| 345 | { |
| 346 | const struct pm8xxx_drvdata *pm8921_drvdata = dev_get_drvdata(dev); |
| 347 | const struct pm8921 *pmic = pm8921_drvdata->pm_chip_data; |
| 348 | |
David Brown | ce44bf5 | 2013-03-12 11:41:54 -0700 | [diff] [blame] | 349 | return ssbi_write(pmic->dev->parent, addr, &val, 1); |
Abhijeet Dharmapurikar | cbdb53e | 2011-04-05 14:40:52 -0700 | [diff] [blame] | 350 | } |
| 351 | |
| 352 | static int pm8921_read_buf(const struct device *dev, u16 addr, u8 *buf, |
| 353 | int cnt) |
| 354 | { |
| 355 | const struct pm8xxx_drvdata *pm8921_drvdata = dev_get_drvdata(dev); |
| 356 | const struct pm8921 *pmic = pm8921_drvdata->pm_chip_data; |
| 357 | |
David Brown | ce44bf5 | 2013-03-12 11:41:54 -0700 | [diff] [blame] | 358 | return ssbi_read(pmic->dev->parent, addr, buf, cnt); |
Abhijeet Dharmapurikar | cbdb53e | 2011-04-05 14:40:52 -0700 | [diff] [blame] | 359 | } |
| 360 | |
| 361 | static int pm8921_write_buf(const struct device *dev, u16 addr, u8 *buf, |
| 362 | int cnt) |
| 363 | { |
| 364 | const struct pm8xxx_drvdata *pm8921_drvdata = dev_get_drvdata(dev); |
| 365 | const struct pm8921 *pmic = pm8921_drvdata->pm_chip_data; |
| 366 | |
David Brown | ce44bf5 | 2013-03-12 11:41:54 -0700 | [diff] [blame] | 367 | return ssbi_write(pmic->dev->parent, addr, buf, cnt); |
Abhijeet Dharmapurikar | cbdb53e | 2011-04-05 14:40:52 -0700 | [diff] [blame] | 368 | } |
| 369 | |
Abhijeet Dharmapurikar | c013f0a | 2011-04-05 14:40:53 -0700 | [diff] [blame] | 370 | static int pm8921_read_irq_stat(const struct device *dev, int irq) |
| 371 | { |
| 372 | const struct pm8xxx_drvdata *pm8921_drvdata = dev_get_drvdata(dev); |
| 373 | const struct pm8921 *pmic = pm8921_drvdata->pm_chip_data; |
| 374 | |
| 375 | return pm8xxx_get_irq_stat(pmic->irq_chip, irq); |
| 376 | } |
| 377 | |
Abhijeet Dharmapurikar | cbdb53e | 2011-04-05 14:40:52 -0700 | [diff] [blame] | 378 | static struct pm8xxx_drvdata pm8921_drvdata = { |
| 379 | .pmic_readb = pm8921_readb, |
| 380 | .pmic_writeb = pm8921_writeb, |
| 381 | .pmic_read_buf = pm8921_read_buf, |
| 382 | .pmic_write_buf = pm8921_write_buf, |
Abhijeet Dharmapurikar | c013f0a | 2011-04-05 14:40:53 -0700 | [diff] [blame] | 383 | .pmic_read_irq_stat = pm8921_read_irq_stat, |
Abhijeet Dharmapurikar | cbdb53e | 2011-04-05 14:40:52 -0700 | [diff] [blame] | 384 | }; |
| 385 | |
Stephen Boyd | e7b81fca | 2014-02-26 10:59:23 -0800 | [diff] [blame^] | 386 | static const struct regmap_config ssbi_regmap_config = { |
| 387 | .reg_bits = 16, |
| 388 | .val_bits = 8, |
| 389 | .max_register = 0x3ff, |
| 390 | .fast_io = true, |
| 391 | .reg_read = ssbi_reg_read, |
| 392 | .reg_write = ssbi_reg_write |
| 393 | }; |
| 394 | |
Bill Pemberton | f791be4 | 2012-11-19 13:23:04 -0500 | [diff] [blame] | 395 | static int pm8921_probe(struct platform_device *pdev) |
Abhijeet Dharmapurikar | cbdb53e | 2011-04-05 14:40:52 -0700 | [diff] [blame] | 396 | { |
Abhijeet Dharmapurikar | cbdb53e | 2011-04-05 14:40:52 -0700 | [diff] [blame] | 397 | struct pm8921 *pmic; |
Stephen Boyd | e7b81fca | 2014-02-26 10:59:23 -0800 | [diff] [blame^] | 398 | struct regmap *regmap; |
Abhijeet Dharmapurikar | cbdb53e | 2011-04-05 14:40:52 -0700 | [diff] [blame] | 399 | int rc; |
Stephen Boyd | e7b81fca | 2014-02-26 10:59:23 -0800 | [diff] [blame^] | 400 | unsigned int val; |
Stephen Boyd | dc1a95c | 2014-02-26 10:59:21 -0800 | [diff] [blame] | 401 | unsigned int irq; |
Abhijeet Dharmapurikar | c013f0a | 2011-04-05 14:40:53 -0700 | [diff] [blame] | 402 | u32 rev; |
Stephen Boyd | dc1a95c | 2014-02-26 10:59:21 -0800 | [diff] [blame] | 403 | struct pm_irq_chip *chip; |
| 404 | unsigned int nirqs = PM8921_NR_IRQS; |
Abhijeet Dharmapurikar | cbdb53e | 2011-04-05 14:40:52 -0700 | [diff] [blame] | 405 | |
Stephen Boyd | dc1a95c | 2014-02-26 10:59:21 -0800 | [diff] [blame] | 406 | irq = platform_get_irq(pdev, 0); |
| 407 | if (irq < 0) |
| 408 | return irq; |
Abhijeet Dharmapurikar | cbdb53e | 2011-04-05 14:40:52 -0700 | [diff] [blame] | 409 | |
Jingoo Han | b2cdcfa | 2013-08-20 16:02:26 +0900 | [diff] [blame] | 410 | pmic = devm_kzalloc(&pdev->dev, sizeof(struct pm8921), GFP_KERNEL); |
Abhijeet Dharmapurikar | cbdb53e | 2011-04-05 14:40:52 -0700 | [diff] [blame] | 411 | if (!pmic) { |
| 412 | pr_err("Cannot alloc pm8921 struct\n"); |
| 413 | return -ENOMEM; |
| 414 | } |
| 415 | |
Stephen Boyd | e7b81fca | 2014-02-26 10:59:23 -0800 | [diff] [blame^] | 416 | regmap = devm_regmap_init(&pdev->dev, NULL, pdev->dev.parent, |
| 417 | &ssbi_regmap_config); |
| 418 | if (IS_ERR(regmap)) |
| 419 | return PTR_ERR(regmap); |
| 420 | |
Abhijeet Dharmapurikar | cbdb53e | 2011-04-05 14:40:52 -0700 | [diff] [blame] | 421 | /* Read PMIC chip revision */ |
Stephen Boyd | e7b81fca | 2014-02-26 10:59:23 -0800 | [diff] [blame^] | 422 | rc = regmap_read(regmap, REG_HWREV, &val); |
Abhijeet Dharmapurikar | cbdb53e | 2011-04-05 14:40:52 -0700 | [diff] [blame] | 423 | if (rc) { |
| 424 | pr_err("Failed to read hw rev reg %d:rc=%d\n", REG_HWREV, rc); |
Jingoo Han | b2cdcfa | 2013-08-20 16:02:26 +0900 | [diff] [blame] | 425 | return rc; |
Abhijeet Dharmapurikar | cbdb53e | 2011-04-05 14:40:52 -0700 | [diff] [blame] | 426 | } |
| 427 | pr_info("PMIC revision 1: %02X\n", val); |
Abhijeet Dharmapurikar | c013f0a | 2011-04-05 14:40:53 -0700 | [diff] [blame] | 428 | rev = val; |
Abhijeet Dharmapurikar | cbdb53e | 2011-04-05 14:40:52 -0700 | [diff] [blame] | 429 | |
| 430 | /* Read PMIC chip revision 2 */ |
Stephen Boyd | e7b81fca | 2014-02-26 10:59:23 -0800 | [diff] [blame^] | 431 | rc = regmap_read(regmap, REG_HWREV_2, &val); |
Abhijeet Dharmapurikar | cbdb53e | 2011-04-05 14:40:52 -0700 | [diff] [blame] | 432 | if (rc) { |
| 433 | pr_err("Failed to read hw rev 2 reg %d:rc=%d\n", |
| 434 | REG_HWREV_2, rc); |
Jingoo Han | b2cdcfa | 2013-08-20 16:02:26 +0900 | [diff] [blame] | 435 | return rc; |
Abhijeet Dharmapurikar | cbdb53e | 2011-04-05 14:40:52 -0700 | [diff] [blame] | 436 | } |
| 437 | pr_info("PMIC revision 2: %02X\n", val); |
Abhijeet Dharmapurikar | c013f0a | 2011-04-05 14:40:53 -0700 | [diff] [blame] | 438 | rev |= val << BITS_PER_BYTE; |
Abhijeet Dharmapurikar | cbdb53e | 2011-04-05 14:40:52 -0700 | [diff] [blame] | 439 | |
| 440 | pmic->dev = &pdev->dev; |
| 441 | pm8921_drvdata.pm_chip_data = pmic; |
| 442 | platform_set_drvdata(pdev, &pm8921_drvdata); |
| 443 | |
Stephen Boyd | dc1a95c | 2014-02-26 10:59:21 -0800 | [diff] [blame] | 444 | chip = devm_kzalloc(&pdev->dev, sizeof(*chip) + |
| 445 | sizeof(chip->config[0]) * nirqs, |
| 446 | GFP_KERNEL); |
| 447 | if (!chip) |
| 448 | return -ENOMEM; |
| 449 | |
| 450 | pmic->irq_chip = chip; |
| 451 | chip->dev = &pdev->dev; |
Stephen Boyd | e7b81fca | 2014-02-26 10:59:23 -0800 | [diff] [blame^] | 452 | chip->regmap = regmap; |
Stephen Boyd | dc1a95c | 2014-02-26 10:59:21 -0800 | [diff] [blame] | 453 | chip->num_irqs = nirqs; |
| 454 | chip->num_blocks = DIV_ROUND_UP(chip->num_irqs, 8); |
| 455 | chip->num_masters = DIV_ROUND_UP(chip->num_blocks, 8); |
| 456 | spin_lock_init(&chip->pm_irq_lock); |
| 457 | |
| 458 | chip->irqdomain = irq_domain_add_linear(pdev->dev.of_node, nirqs, |
| 459 | &pm8xxx_irq_domain_ops, |
| 460 | chip); |
| 461 | if (!chip->irqdomain) |
| 462 | return -ENODEV; |
| 463 | |
| 464 | irq_set_handler_data(irq, chip); |
| 465 | irq_set_chained_handler(irq, pm8xxx_irq_handler); |
| 466 | irq_set_irq_wake(irq, 1); |
| 467 | |
| 468 | rc = of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev); |
Abhijeet Dharmapurikar | c013f0a | 2011-04-05 14:40:53 -0700 | [diff] [blame] | 469 | if (rc) { |
Stephen Boyd | dc1a95c | 2014-02-26 10:59:21 -0800 | [diff] [blame] | 470 | irq_set_chained_handler(irq, NULL); |
| 471 | irq_set_handler_data(irq, NULL); |
| 472 | irq_domain_remove(chip->irqdomain); |
Abhijeet Dharmapurikar | c013f0a | 2011-04-05 14:40:53 -0700 | [diff] [blame] | 473 | } |
| 474 | |
Abhijeet Dharmapurikar | cbdb53e | 2011-04-05 14:40:52 -0700 | [diff] [blame] | 475 | return rc; |
| 476 | } |
| 477 | |
Stephen Boyd | dc1a95c | 2014-02-26 10:59:21 -0800 | [diff] [blame] | 478 | static int pm8921_remove_child(struct device *dev, void *unused) |
| 479 | { |
| 480 | platform_device_unregister(to_platform_device(dev)); |
| 481 | return 0; |
| 482 | } |
| 483 | |
Bill Pemberton | 4740f73 | 2012-11-19 13:26:01 -0500 | [diff] [blame] | 484 | static int pm8921_remove(struct platform_device *pdev) |
Abhijeet Dharmapurikar | cbdb53e | 2011-04-05 14:40:52 -0700 | [diff] [blame] | 485 | { |
Stephen Boyd | dc1a95c | 2014-02-26 10:59:21 -0800 | [diff] [blame] | 486 | int irq = platform_get_irq(pdev, 0); |
| 487 | struct pm8921 *pmic = pm8921_drvdata.pm_chip_data; |
| 488 | struct pm_irq_chip *chip = pmic->irq_chip; |
Abhijeet Dharmapurikar | cbdb53e | 2011-04-05 14:40:52 -0700 | [diff] [blame] | 489 | |
Stephen Boyd | dc1a95c | 2014-02-26 10:59:21 -0800 | [diff] [blame] | 490 | device_for_each_child(&pdev->dev, NULL, pm8921_remove_child); |
| 491 | irq_set_chained_handler(irq, NULL); |
| 492 | irq_set_handler_data(irq, NULL); |
| 493 | irq_domain_remove(chip->irqdomain); |
Abhijeet Dharmapurikar | cbdb53e | 2011-04-05 14:40:52 -0700 | [diff] [blame] | 494 | |
| 495 | return 0; |
| 496 | } |
| 497 | |
| 498 | static struct platform_driver pm8921_driver = { |
| 499 | .probe = pm8921_probe, |
Bill Pemberton | 8444921 | 2012-11-19 13:20:24 -0500 | [diff] [blame] | 500 | .remove = pm8921_remove, |
Abhijeet Dharmapurikar | cbdb53e | 2011-04-05 14:40:52 -0700 | [diff] [blame] | 501 | .driver = { |
| 502 | .name = "pm8921-core", |
| 503 | .owner = THIS_MODULE, |
| 504 | }, |
| 505 | }; |
| 506 | |
| 507 | static int __init pm8921_init(void) |
| 508 | { |
| 509 | return platform_driver_register(&pm8921_driver); |
| 510 | } |
| 511 | subsys_initcall(pm8921_init); |
| 512 | |
| 513 | static void __exit pm8921_exit(void) |
| 514 | { |
| 515 | platform_driver_unregister(&pm8921_driver); |
| 516 | } |
| 517 | module_exit(pm8921_exit); |
| 518 | |
| 519 | MODULE_LICENSE("GPL v2"); |
| 520 | MODULE_DESCRIPTION("PMIC 8921 core driver"); |
| 521 | MODULE_VERSION("1.0"); |
| 522 | MODULE_ALIAS("platform:pm8921-core"); |