/* * wm831x-core.c -- Device access for Wolfson WM831x PMICs * * Copyright 2009 Wolfson Microelectronics PLC. * * Author: Mark Brown * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * */ #include #include #include #include #include #include #include #include #include #include #include #include /* Current settings - values are 2*2^(reg_val/4) microamps. These are * exported since they are used by multiple drivers. */ int wm831x_isinkv_values[WM831X_ISINK_MAX_ISEL + 1] = { 2, 2, 3, 3, 4, 5, 6, 7, 8, 10, 11, 13, 16, 19, 23, 27, 32, 38, 45, 54, 64, 76, 91, 108, 128, 152, 181, 215, 256, 304, 362, 431, 512, 609, 724, 861, 1024, 1218, 1448, 1722, 2048, 2435, 2896, 3444, 4096, 4871, 5793, 6889, 8192, 9742, 11585, 13777, 16384, 19484, 23170, 27554, }; EXPORT_SYMBOL_GPL(wm831x_isinkv_values); static int wm831x_reg_locked(struct wm831x *wm831x, unsigned short reg) { if (!wm831x->locked) return 0; switch (reg) { case WM831X_WATCHDOG: case WM831X_DC4_CONTROL: case WM831X_ON_PIN_CONTROL: case WM831X_BACKUP_CHARGER_CONTROL: case WM831X_CHARGER_CONTROL_1: case WM831X_CHARGER_CONTROL_2: return 1; default: return 0; } } /** * wm831x_reg_unlock: Unlock user keyed registers * * The WM831x has a user key preventing writes to particularly * critical registers. This function locks those registers, * allowing writes to them. */ void wm831x_reg_lock(struct wm831x *wm831x) { int ret; ret = wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0); if (ret == 0) { dev_vdbg(wm831x->dev, "Registers locked\n"); mutex_lock(&wm831x->io_lock); WARN_ON(wm831x->locked); wm831x->locked = 1; mutex_unlock(&wm831x->io_lock); } else { dev_err(wm831x->dev, "Failed to lock registers: %d\n", ret); } } EXPORT_SYMBOL_GPL(wm831x_reg_lock); /** * wm831x_reg_unlock: Unlock user keyed registers * * The WM831x has a user key preventing writes to particularly * critical registers. This function locks those registers, * preventing spurious writes. */ int wm831x_reg_unlock(struct wm831x *wm831x) { int ret; /* 0x9716 is the value required to unlock the registers */ ret = wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0x9716); if (ret == 0) { dev_vdbg(wm831x->dev, "Registers unlocked\n"); mutex_lock(&wm831x->io_lock); WARN_ON(!wm831x->locked); wm831x->locked = 0; mutex_unlock(&wm831x->io_lock); } return ret; } EXPORT_SYMBOL_GPL(wm831x_reg_unlock); static int wm831x_read(struct wm831x *wm831x, unsigned short reg, int bytes, void *dest) { int ret, i; u16 *buf = dest; BUG_ON(bytes % 2); BUG_ON(bytes <= 0); ret = wm831x->read_dev(wm831x, reg, bytes, dest); if (ret < 0) return ret; for (i = 0; i < bytes / 2; i++) { buf[i] = be16_to_cpu(buf[i]); dev_vdbg(wm831x->dev, "Read %04x from R%d(0x%x)\n", buf[i], reg + i, reg + i); } return 0; } /** * wm831x_reg_read: Read a single WM831x register. * * @wm831x: Device to read from. * @reg: Register to read. */ int wm831x_reg_read(struct wm831x *wm831x, unsigned short reg) { unsigned short val; int ret; mutex_lock(&wm831x->io_lock); ret = wm831x_read(wm831x, reg, 2, &val); mutex_unlock(&wm831x->io_lock); if (ret < 0) return ret; else return val; } EXPORT_SYMBOL_GPL(wm831x_reg_read); /** * wm831x_bulk_read: Read multiple WM831x registers * * @wm831x: Device to read from * @reg: First register * @count: Number of registers * @buf: Buffer to fill. */ int wm831x_bulk_read(struct wm831x *wm831x, unsigned short reg, int count, u16 *buf) { int ret; mutex_lock(&wm831x->io_lock); ret = wm831x_read(wm831x, reg, count * 2, buf); mutex_unlock(&wm831x->io_lock); return ret; } EXPORT_SYMBOL_GPL(wm831x_bulk_read); static int wm831x_write(struct wm831x *wm831x, unsigned short reg, int bytes, void *src) { u16 *buf = src; int i; BUG_ON(bytes % 2); BUG_ON(bytes <= 0); for (i = 0; i < bytes / 2; i++) { if (wm831x_reg_locked(wm831x, reg)) return -EPERM; dev_vdbg(wm831x->dev, "Write %04x to R%d(0x%x)\n", buf[i], reg + i, reg + i); buf[i] = cpu_to_be16(buf[i]); } return wm831x->write_dev(wm831x, reg, bytes, src); } /** * wm831x_reg_write: Write a single WM831x register. * * @wm831x: Device to write to. * @reg: Register to write to. * @val: Value to write. */ int wm831x_reg_write(struct wm831x *wm831x, unsigned short reg, unsigned short val) { int ret; mutex_lock(&wm831x->io_lock); ret = wm831x_write(wm831x, reg, 2, &val); mutex_unlock(&wm831x->io_lock); return ret; } EXPORT_SYMBOL_GPL(wm831x_reg_write); /** * wm831x_set_bits: Set the value of a bitfield in a WM831x register * * @wm831x: Device to write to. * @reg: Register to write to. * @mask: Mask of bits to set. * @val: Value to set (unshifted) */ int wm831x_set_bits(struct wm831x *wm831x, unsigned short reg, unsigned short mask, unsigned short val) { int ret; u16 r; mutex_lock(&wm831x->io_lock); ret = wm831x_read(wm831x, reg, 2, &r); if (ret < 0) goto out; r &= ~mask; r |= val; ret = wm831x_write(wm831x, reg, 2, &r); out: mutex_unlock(&wm831x->io_lock); return ret; } EXPORT_SYMBOL_GPL(wm831x_set_bits); /** * wm831x_auxadc_read: Read a value from the WM831x AUXADC * * @wm831x: Device to read from. * @input: AUXADC input to read. */ int wm831x_auxadc_read(struct wm831x *wm831x, enum wm831x_auxadc input) { int ret, src, irq_masked, timeout; /* Are we using the interrupt? */ irq_masked = wm831x_reg_read(wm831x, WM831X_INTERRUPT_STATUS_1_MASK); irq_masked &= WM831X_AUXADC_DATA_EINT; mutex_lock(&wm831x->auxadc_lock); ret = wm831x_set_bits(wm831x, WM831X_AUXADC_CONTROL, WM831X_AUX_ENA, WM831X_AUX_ENA); if (ret < 0) { dev_err(wm831x->dev, "Failed to enable AUXADC: %d\n", ret); goto out; } /* We force a single source at present */ src = input; ret = wm831x_reg_write(wm831x, WM831X_AUXADC_SOURCE, 1 << src); if (ret < 0) { dev_err(wm831x->dev, "Failed to set AUXADC source: %d\n", ret); goto out; } /* Clear any notification from a very late arriving interrupt */ try_wait_for_completion(&wm831x->auxadc_done); ret = wm831x_set_bits(wm831x, WM831X_AUXADC_CONTROL, WM831X_AUX_CVT_ENA, WM831X_AUX_CVT_ENA); if (ret < 0) { dev_err(wm831x->dev, "Failed to start AUXADC: %d\n", ret); goto disable; } if (irq_masked) { /* If we're not using interrupts then poll the * interrupt status register */ timeout = 5; while (timeout) { msleep(1); ret = wm831x_reg_read(wm831x, WM831X_INTERRUPT_STATUS_1); if (ret < 0) { dev_err(wm831x->dev, "ISR 1 read failed: %d\n", ret); goto disable; } /* Did it complete? */ if (ret & WM831X_AUXADC_DATA_EINT) { wm831x_reg_write(wm831x, WM831X_INTERRUPT_STATUS_1, WM831X_AUXADC_DATA_EINT); break; } else { dev_err(wm831x->dev, "AUXADC conversion timeout\n"); ret = -EBUSY; goto disable; } } ret = wm831x_reg_read(wm831x, WM831X_AUXADC_DATA); if (ret < 0) { dev_err(wm831x->dev, "Failed to read AUXADC data: %d\n", ret); goto disable; } wm831x->auxadc_data = ret; } else { /* If we are using interrupts then wait for the * interrupt to complete. Use an extremely long * timeout to handle situations with heavy load where * the notification of the interrupt may be delayed by * threaded IRQ handling. */ if (!wait_for_completion_timeout(&wm831x->auxadc_done, msecs_to_jiffies(500))) { dev_err(wm831x->dev, "Timed out waiting for AUXADC\n"); ret = -EBUSY; goto disable; } } src = ((wm831x->auxadc_data & WM831X_AUX_DATA_SRC_MASK) >> WM831X_AUX_DATA_SRC_SHIFT) - 1; if (src == 14) src = WM831X_AUX_CAL; if (src != input) { dev_err(wm831x->dev, "Data from source %d not %d\n", src, input); ret = -EINVAL; } else { ret = wm831x->auxadc_data & WM831X_AUX_DATA_MASK; } disable: wm831x_set_bits(wm831x, WM831X_AUXADC_CONTROL, WM831X_AUX_ENA, 0); out: mutex_unlock(&wm831x->auxadc_lock); return ret; } EXPORT_SYMBOL_GPL(wm831x_auxadc_read); static irqreturn_t wm831x_auxadc_irq(int irq, void *irq_data) { struct wm831x *wm831x = irq_data; int ret; ret = wm831x_reg_read(wm831x, WM831X_AUXADC_DATA); if (ret < 0) { dev_err(wm831x->dev, "Failed to read AUXADC data: %d\n", ret); wm831x->auxadc_data = 0xffff; } else { wm831x->auxadc_data = ret; } complete(&wm831x->auxadc_done); return IRQ_HANDLED; } /** * wm831x_auxadc_read_uv: Read a voltage from the WM831x AUXADC * * @wm831x: Device to read from. * @input: AUXADC input to read. */ int wm831x_auxadc_read_uv(struct wm831x *wm831x, enum wm831x_auxadc input) { int ret; ret = wm831x_auxadc_read(wm831x, input); if (ret < 0) return ret; ret *= 1465; return ret; } EXPORT_SYMBOL_GPL(wm831x_auxadc_read_uv); static struct resource wm831x_dcdc1_resources[] = { { .start = WM831X_DC1_CONTROL_1, .end = WM831X_DC1_DVS_CONTROL, .flags = IORESOURCE_IO, }, { .name = "UV", .start = WM831X_IRQ_UV_DC1, .end = WM831X_IRQ_UV_DC1, .flags = IORESOURCE_IRQ, }, { .name = "HC", .start = WM831X_IRQ_HC_DC1, .end = WM831X_IRQ_HC_DC1, .flags = IORESOURCE_IRQ, }, }; static struct resource wm831x_dcdc2_resources[] = { { .start = WM831X_DC2_CONTROL_1, .end = WM831X_DC2_DVS_CONTROL, .flags = IORESOURCE_IO, }, { .name = "UV", .start = WM831X_IRQ_UV_DC2, .end = WM831X_IRQ_UV_DC2, .flags = IORESOURCE_IRQ, }, { .name = "HC", .start = WM831X_IRQ_HC_DC2, .end = WM831X_IRQ_HC_DC2, .flags = IORESOURCE_IRQ, }, }; static struct resource wm831x_dcdc3_resources[] = { { .start = WM831X_DC3_CONTROL_1, .end = WM831X_DC3_SLEEP_CONTROL, .flags = IORESOURCE_IO, }, { .name = "UV", .start = WM831X_IRQ_UV_DC3, .end = WM831X_IRQ_UV_DC3, .flags = IORESOURCE_IRQ, }, }; static struct resource wm831x_dcdc4_resources[] = { { .start = WM831X_DC4_CONTROL, .end = WM831X_DC4_SLEEP_CONTROL, .flags = IORESOURCE_IO, }, { .name = "UV", .start = WM831X_IRQ_UV_DC4, .end = WM831X_IRQ_UV_DC4, .flags = IORESOURCE_IRQ, }, }; static struct resource wm8320_dcdc4_buck_resources[] = { { .start = WM831X_DC4_CONTROL, .end = WM832X_DC4_SLEEP_CONTROL, .flags = IORESOURCE_IO, }, { .name = "UV", .start = WM831X_IRQ_UV_DC4, .end = WM831X_IRQ_UV_DC4, .flags = IORESOURCE_IRQ, }, }; static struct resource wm831x_gpio_resources[] = { { .start = WM831X_IRQ_GPIO_1, .end = WM831X_IRQ_GPIO_16, .flags = IORESOURCE_IRQ, }, }; static struct resource wm831x_isink1_resources[] = { { .start = WM831X_CURRENT_SINK_1, .end = WM831X_CURRENT_SINK_1, .flags = IORESOURCE_IO, }, { .start = WM831X_IRQ_CS1, .end = WM831X_IRQ_CS1, .flags = IORESOURCE_IRQ, }, }; static struct resource wm831x_isink2_resources[] = { { .start = WM831X_CURRENT_SINK_2, .end = WM831X_CURRENT_SINK_2, .flags = IORESOURCE_IO, }, { .start = WM831X_IRQ_CS2, .end = WM831X_IRQ_CS2, .flags = IORESOURCE_IRQ, }, }; static struct resource wm831x_ldo1_resources[] = { { .start = WM831X_LDO1_CONTROL, .end = WM831X_LDO1_SLEEP_CONTROL, .flags = IORESOURCE_IO, }, { .name = "UV", .start = WM831X_IRQ_UV_LDO1, .end = WM831X_IRQ_UV_LDO1, .flags = IORESOURCE_IRQ, }, }; static struct resource wm831x_ldo2_resources[] = { { .start = WM831X_LDO2_CONTROL, .end = WM831X_LDO2_SLEEP_CONTROL, .flags = IORESOURCE_IO, }, { .name = "UV", .start = WM831X_IRQ_UV_LDO2, .end = WM831X_IRQ_UV_LDO2, .flags = IORESOURCE_IRQ, }, }; static struct resource wm831x_ldo3_resources[] = { { .start = WM831X_LDO3_CONTROL, .end = WM831X_LDO3_SLEEP_CONTROL, .flags = IORESOURCE_IO, }, { .name = "UV", .start = WM831X_IRQ_UV_LDO3, .end = WM831X_IRQ_UV_LDO3, .flags = IORESOURCE_IRQ, }, }; static struct resource wm831x_ldo4_resources[] = { { .start = WM831X_LDO4_CONTROL, .end = WM831X_LDO4_SLEEP_CONTROL, .flags = IORESOURCE_IO, }, { .name = "UV", .start = WM831X_IRQ_UV_LDO4, .end = WM831X_IRQ_UV_LDO4, .flags = IORESOURCE_IRQ, }, }; static struct resource wm831x_ldo5_resources[] = { { .start = WM831X_LDO5_CONTROL, .end = WM831X_LDO5_SLEEP_CONTROL, .flags = IORESOURCE_IO, }, { .name = "UV", .start = WM831X_IRQ_UV_LDO5, .end = WM831X_IRQ_UV_LDO5, .flags = IORESOURCE_IRQ, }, }; static struct resource wm831x_ldo6_resources[] = { { .start = WM831X_LDO6_CONTROL, .end = WM831X_LDO6_SLEEP_CONTROL, .flags = IORESOURCE_IO, }, { .name = "UV", .start = WM831X_IRQ_UV_LDO6, .end = WM831X_IRQ_UV_LDO6, .flags = IORESOURCE_IRQ, }, }; static struct resource wm831x_ldo7_resources[] = { { .start = WM831X_LDO7_CONTROL, .end = WM831X_LDO7_SLEEP_CONTROL, .flags = IORESOURCE_IO, }, { .name = "UV", .start = WM831X_IRQ_UV_LDO7, .end = WM831X_IRQ_UV_LDO7, .flags = IORESOURCE_IRQ, }, }; static struct resource wm831x_ldo8_resources[] = { { .start = WM831X_LDO8_CONTROL, .end = WM831X_LDO8_SLEEP_CONTROL, .flags = IORESOURCE_IO, }, { .name = "UV", .start = WM831X_IRQ_UV_LDO8, .end = WM831X_IRQ_UV_LDO8, .flags = IORESOURCE_IRQ, }, }; static struct resource wm831x_ldo9_resources[] = { { .start = WM831X_LDO9_CONTROL, .end = WM831X_LDO9_SLEEP_CONTROL, .flags = IORESOURCE_IO, }, { .name = "UV", .start = WM831X_IRQ_UV_LDO9, .end = WM831X_IRQ_UV_LDO9, .flags = IORESOURCE_IRQ, }, }; static struct resource wm831x_ldo10_resources[] = { { .start = WM831X_LDO10_CONTROL, .end = WM831X_LDO10_SLEEP_CONTROL, .flags = IORESOURCE_IO, }, { .name = "UV", .start = WM831X_IRQ_UV_LDO10, .end = WM831X_IRQ_UV_LDO10, .flags = IORESOURCE_IRQ, }, }; static struct resource wm831x_ldo11_resources[] = { { .start = WM831X_LDO11_ON_CONTROL, .end = WM831X_LDO11_SLEEP_CONTROL, .flags = IORESOURCE_IO, }, }; static struct resource wm831x_on_resources[] = { { .start = WM831X_IRQ_ON, .end = WM831X_IRQ_ON, .flags = IORESOURCE_IRQ, }, }; static struct resource wm831x_power_resources[] = { { .name = "SYSLO", .start = WM831X_IRQ_PPM_SYSLO, .end = WM831X_IRQ_PPM_SYSLO, .flags = IORESOURCE_IRQ, }, { .name = "PWR SRC", .start = WM831X_IRQ_PPM_PWR_SRC, .end = WM831X_IRQ_PPM_PWR_SRC, .flags = IORESOURCE_IRQ, }, { .name = "USB CURR", .start = WM831X_IRQ_PPM_USB_CURR, .end = WM831X_IRQ_PPM_USB_CURR, .flags = IORESOURCE_IRQ, }, { .name = "BATT HOT", .start = WM831X_IRQ_CHG_BATT_HOT, .end = WM831X_IRQ_CHG_BATT_HOT, .flags = IORESOURCE_IRQ, }, { .name = "BATT COLD", .start = WM831X_IRQ_CHG_BATT_COLD, .end = WM831X_IRQ_CHG_BATT_COLD, .flags = IORESOURCE_IRQ, }, { .name = "BATT FAIL", .start = WM831X_IRQ_CHG_BATT_FAIL, .end = WM831X_IRQ_CHG_BATT_FAIL, .flags = IORESOURCE_IRQ, }, { .name = "OV", .start = WM831X_IRQ_CHG_OV, .end = WM831X_IRQ_CHG_OV, .flags = IORESOURCE_IRQ, }, { .name = "END", .start = WM831X_IRQ_CHG_END, .end = WM831X_IRQ_CHG_END, .flags = IORESOURCE_IRQ, }, { .name = "TO", .start = WM831X_IRQ_CHG_TO, .end = WM831X_IRQ_CHG_TO, .flags = IORESOURCE_IRQ, }, { .name = "MODE", .start = WM831X_IRQ_CHG_MODE, .end = WM831X_IRQ_CHG_MODE, .flags = IORESOURCE_IRQ, }, { .name = "START", .start = WM831X_IRQ_CHG_START, .end = WM831X_IRQ_CHG_START, .flags = IORESOURCE_IRQ, }, }; static struct resource wm831x_rtc_resources[] = { { .name = "PER", .start = WM831X_IRQ_RTC_PER, .end = WM831X_IRQ_RTC_PER, .flags = IORESOURCE_IRQ, }, { .name = "ALM", .start = WM831X_IRQ_RTC_ALM, .end = WM831X_IRQ_RTC_ALM, .flags = IORESOURCE_IRQ, }, }; static struct resource wm831x_status1_resources[] = { { .start = WM831X_STATUS_LED_1, .end = WM831X_STATUS_LED_1, .flags = IORESOURCE_IO, }, }; static struct resource wm831x_status2_resources[] = { { .start = WM831X_STATUS_LED_2, .end = WM831X_STATUS_LED_2, .flags = IORESOURCE_IO, }, }; static struct resource wm831x_touch_resources[] = { { .name = "TCHPD", .start = WM831X_IRQ_TCHPD, .end = WM831X_IRQ_TCHPD, .flags = IORESOURCE_IRQ, }, { .name = "TCHDATA", .start = WM831X_IRQ_TCHDATA, .end = WM831X_IRQ_TCHDATA, .flags = IORESOURCE_IRQ, }, }; static struct resource wm831x_wdt_resources[] = { { .start = WM831X_IRQ_WDOG_TO, .end = WM831X_IRQ_WDOG_TO, .flags = IORESOURCE_IRQ, }, }; static struct mfd_cell wm8310_devs[] = { { .name = "wm831x-backup", }, { .name = "wm831x-buckv", .id = 1, .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources), .resources = wm831x_dcdc1_resources, }, { .name = "wm831x-buckv", .id = 2, .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources), .resources = wm831x_dcdc2_resources, }, { .name = "wm831x-buckp", .id = 3, .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources), .resources = wm831x_dcdc3_resources, }, { .name = "wm831x-boostp", .id = 4, .num_resources = ARRAY_SIZE(wm831x_dcdc4_resources), .resources = wm831x_dcdc4_resources, }, { .name = "wm831x-epe", .id = 1, }, { .name = "wm831x-epe", .id = 2, }, { .name = "wm831x-gpio", .num_resources = ARRAY_SIZE(wm831x_gpio_resources), .resources = wm831x_gpio_resources, }, { .name = "wm831x-hwmon", }, { .name = "wm831x-isink", .id = 1, .num_resources = ARRAY_SIZE(wm831x_isink1_resources), .resources = wm831x_isink1_resources, }, { .name = "wm831x-isink", .id = 2, .num_resources = ARRAY_SIZE(wm831x_isink2_resources), .resources = wm831x_isink2_resources, }, { .name = "wm831x-ldo", .id = 1, .num_resources = ARRAY_SIZE(wm831x_ldo1_resources), .resources = wm831x_ldo1_resources, }, { .name = "wm831x-ldo", .id = 2, .num_resources = ARRAY_SIZE(wm831x_ldo2_resources), .resources = wm831x_ldo2_resources, }, { .name = "wm831x-ldo", .id = 3, .num_resources = ARRAY_SIZE(wm831x_ldo3_resources), .resources = wm831x_ldo3_resources, }, { .name = "wm831x-ldo", .id = 4, .num_resources = ARRAY_SIZE(wm831x_ldo4_resources), .resources = wm831x_ldo4_resources, }, { .name = "wm831x-ldo", .id = 5, .num_resources = ARRAY_SIZE(wm831x_ldo5_resources), .resources = wm831x_ldo5_resources, }, { .name = "wm831x-ldo", .id = 6, .num_resources = ARRAY_SIZE(wm831x_ldo6_resources), .resources = wm831x_ldo6_resources, }, { .name = "wm831x-aldo", .id = 7, .num_resources = ARRAY_SIZE(wm831x_ldo7_resources), .resources = wm831x_ldo7_resources, }, { .name = "wm831x-aldo", .id = 8, .num_resources = ARRAY_SIZE(wm831x_ldo8_resources), .resources = wm831x_ldo8_resources, }, { .name = "wm831x-aldo", .id = 9, .num_resources = ARRAY_SIZE(wm831x_ldo9_resources), .resources = wm831x_ldo9_resources, }, { .name = "wm831x-aldo", .id = 10, .num_resources = ARRAY_SIZE(wm831x_ldo10_resources), .resources = wm831x_ldo10_resources, }, { .name = "wm831x-alive-ldo", .id = 11, .num_resources = ARRAY_SIZE(wm831x_ldo11_resources), .resources = wm831x_ldo11_resources, }, { .name = "wm831x-on", .num_resources = ARRAY_SIZE(wm831x_on_resources), .resources = wm831x_on_resources, }, { .name = "wm831x-power", .num_resources = ARRAY_SIZE(wm831x_power_resources), .resources = wm831x_power_resources, }, { .name = "wm831x-status", .id = 1, .num_resources = ARRAY_SIZE(wm831x_status1_resources), .resources = wm831x_status1_resources, }, { .name = "wm831x-status", .id = 2, .num_resources = ARRAY_SIZE(wm831x_status2_resources), .resources = wm831x_status2_resources, }, { .name = "wm831x-watchdog", .num_resources = ARRAY_SIZE(wm831x_wdt_resources), .resources = wm831x_wdt_resources, }, }; static struct mfd_cell wm8311_devs[] = { { .name = "wm831x-backup", }, { .name = "wm831x-buckv", .id = 1, .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources), .resources = wm831x_dcdc1_resources, }, { .name = "wm831x-buckv", .id = 2, .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources), .resources = wm831x_dcdc2_resources, }, { .name = "wm831x-buckp", .id = 3, .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources), .resources = wm831x_dcdc3_resources, }, { .name = "wm831x-boostp", .id = 4, .num_resources = ARRAY_SIZE(wm831x_dcdc4_resources), .resources = wm831x_dcdc4_resources, }, { .name = "wm831x-epe", .id = 1, }, { .name = "wm831x-epe", .id = 2, }, { .name = "wm831x-gpio", .num_resources = ARRAY_SIZE(wm831x_gpio_resources), .resources = wm831x_gpio_resources, }, { .name = "wm831x-hwmon", }, { .name = "wm831x-isink", .id = 1, .num_resources = ARRAY_SIZE(wm831x_isink1_resources), .resources = wm831x_isink1_resources, }, { .name = "wm831x-isink", .id = 2, .num_resources = ARRAY_SIZE(wm831x_isink2_resources), .resources = wm831x_isink2_resources, }, { .name = "wm831x-ldo", .id = 1, .num_resources = ARRAY_SIZE(wm831x_ldo1_resources), .resources = wm831x_ldo1_resources, }, { .name = "wm831x-ldo", .id = 2, .num_resources = ARRAY_SIZE(wm831x_ldo2_resources), .resources = wm831x_ldo2_resources, }, { .name = "wm831x-ldo", .id = 3, .num_resources = ARRAY_SIZE(wm831x_ldo3_resources), .resources = wm831x_ldo3_resources, }, { .name = "wm831x-ldo", .id = 4, .num_resources = ARRAY_SIZE(wm831x_ldo4_resources), .resources = wm831x_ldo4_resources, }, { .name = "wm831x-ldo", .id = 5, .num_resources = ARRAY_SIZE(wm831x_ldo5_resources), .resources = wm831x_ldo5_resources, }, { .name = "wm831x-aldo", .id = 7, .num_resources = ARRAY_SIZE(wm831x_ldo7_resources), .resources = wm831x_ldo7_resources, }, { .name = "wm831x-alive-ldo", .id = 11, .num_resources = ARRAY_SIZE(wm831x_ldo11_resources), .resources = wm831x_ldo11_resources, }, { .name = "wm831x-on", .num_resources = ARRAY_SIZE(wm831x_on_resources), .resources = wm831x_on_resources, }, { .name = "wm831x-power", .num_resources = ARRAY_SIZE(wm831x_power_resources), .resources = wm831x_power_resources, }, { .name = "wm831x-status", .id = 1, .num_resources = ARRAY_SIZE(wm831x_status1_resources), .resources = wm831x_status1_resources, }, { .name = "wm831x-status", .id = 2, .num_resources = ARRAY_SIZE(wm831x_status2_resources), .resources = wm831x_status2_resources, }, { .name = "wm831x-watchdog", .num_resources = ARRAY_SIZE(wm831x_wdt_resources), .resources = wm831x_wdt_resources, }, }; static struct mfd_cell wm8312_devs[] = { { .name = "wm831x-backup", }, { .name = "wm831x-buckv", .id = 1, .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources), .resources = wm831x_dcdc1_resources, }, { .name = "wm831x-buckv", .id = 2, .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources), .resources = wm831x_dcdc2_resources, }, { .name = "wm831x-buckp", .id = 3, .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources), .resources = wm831x_dcdc3_resources, }, { .name = "wm831x-boostp", .id = 4, .num_resources = ARRAY_SIZE(wm831x_dcdc4_resources), .resources = wm831x_dcdc4_resources, }, { .name = "wm831x-epe", .id = 1, }, { .name = "wm831x-epe", .id = 2, }, { .name = "wm831x-gpio", .num_resources = ARRAY_SIZE(wm831x_gpio_resources), .resources = wm831x_gpio_resources, }, { .name = "wm831x-hwmon", }, { .name = "wm831x-isink", .id = 1, .num_resources = ARRAY_SIZE(wm831x_isink1_resources), .resources = wm831x_isink1_resources, }, { .name = "wm831x-isink", .id = 2, .num_resources = ARRAY_SIZE(wm831x_isink2_resources), .resources = wm831x_isink2_resources, }, { .name = "wm831x-ldo", .id = 1, .num_resources = ARRAY_SIZE(wm831x_ldo1_resources), .resources = wm831x_ldo1_resources, }, { .name = "wm831x-ldo", .id = 2, .num_resources = ARRAY_SIZE(wm831x_ldo2_resources), .resources = wm831x_ldo2_resources, }, { .name = "wm831x-ldo", .id = 3, .num_resources = ARRAY_SIZE(wm831x_ldo3_resources), .resources = wm831x_ldo3_resources, }, { .name = "wm831x-ldo", .id = 4, .num_resources = ARRAY_SIZE(wm831x_ldo4_resources), .resources = wm831x_ldo4_resources, }, { .name = "wm831x-ldo", .id = 5, .num_resources = ARRAY_SIZE(wm831x_ldo5_resources), .resources = wm831x_ldo5_resources, }, { .name = "wm831x-ldo", .id = 6, .num_resources = ARRAY_SIZE(wm831x_ldo6_resources), .resources = wm831x_ldo6_resources, }, { .name = "wm831x-aldo", .id = 7, .num_resources = ARRAY_SIZE(wm831x_ldo7_resources), .resources = wm831x_ldo7_resources, }, { .name = "wm831x-aldo", .id = 8, .num_resources = ARRAY_SIZE(wm831x_ldo8_resources), .resources = wm831x_ldo8_resources, }, { .name = "wm831x-aldo", .id = 9, .num_resources = ARRAY_SIZE(wm831x_ldo9_resources), .resources = wm831x_ldo9_resources, }, { .name = "wm831x-aldo", .id = 10, .num_resources = ARRAY_SIZE(wm831x_ldo10_resources), .resources = wm831x_ldo10_resources, }, { .name = "wm831x-alive-ldo", .id = 11, .num_resources = ARRAY_SIZE(wm831x_ldo11_resources), .resources = wm831x_ldo11_resources, }, { .name = "wm831x-on", .num_resources = ARRAY_SIZE(wm831x_on_resources), .resources = wm831x_on_resources, }, { .name = "wm831x-power", .num_resources = ARRAY_SIZE(wm831x_power_resources), .resources = wm831x_power_resources, }, { .name = "wm831x-status", .id = 1, .num_resources = ARRAY_SIZE(wm831x_status1_resources), .resources = wm831x_status1_resources, }, { .name = "wm831x-status", .id = 2, .num_resources = ARRAY_SIZE(wm831x_status2_resources), .resources = wm831x_status2_resources, }, { .name = "wm831x-watchdog", .num_resources = ARRAY_SIZE(wm831x_wdt_resources), .resources = wm831x_wdt_resources, }, }; static struct mfd_cell wm8320_devs[] = { { .name = "wm831x-backup", }, { .name = "wm831x-buckv", .id = 1, .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources), .resources = wm831x_dcdc1_resources, }, { .name = "wm831x-buckv", .id = 2, .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources), .resources = wm831x_dcdc2_resources, }, { .name = "wm831x-buckp", .id = 3, .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources), .resources = wm831x_dcdc3_resources, }, { .name = "wm831x-buckp", .id = 4, .num_resources = ARRAY_SIZE(wm8320_dcdc4_buck_resources), .resources = wm8320_dcdc4_buck_resources, }, { .name = "wm831x-gpio", .num_resources = ARRAY_SIZE(wm831x_gpio_resources), .resources = wm831x_gpio_resources, }, { .name = "wm831x-hwmon", }, { .name = "wm831x-ldo", .id = 1, .num_resources = ARRAY_SIZE(wm831x_ldo1_resources), .resources = wm831x_ldo1_resources, }, { .name = "wm831x-ldo", .id = 2, .num_resources = ARRAY_SIZE(wm831x_ldo2_resources), .resources = wm831x_ldo2_resources, }, { .name = "wm831x-ldo", .id = 3, .num_resources = ARRAY_SIZE(wm831x_ldo3_resources), .resources = wm831x_ldo3_resources, }, { .name = "wm831x-ldo", .id = 4, .num_resources = ARRAY_SIZE(wm831x_ldo4_resources), .resources = wm831x_ldo4_resources, }, { .name = "wm831x-ldo", .id = 5, .num_resources = ARRAY_SIZE(wm831x_ldo5_resources), .resources = wm831x_ldo5_resources, }, { .name = "wm831x-ldo", .id = 6, .num_resources = ARRAY_SIZE(wm831x_ldo6_resources), .resources = wm831x_ldo6_resources, }, { .name = "wm831x-aldo", .id = 7, .num_resources = ARRAY_SIZE(wm831x_ldo7_resources), .resources = wm831x_ldo7_resources, }, { .name = "wm831x-aldo", .id = 8, .num_resources = ARRAY_SIZE(wm831x_ldo8_resources), .resources = wm831x_ldo8_resources, }, { .name = "wm831x-aldo", .id = 9, .num_resources = ARRAY_SIZE(wm831x_ldo9_resources), .resources = wm831x_ldo9_resources, }, { .name = "wm831x-aldo", .id = 10, .num_resources = ARRAY_SIZE(wm831x_ldo10_resources), .resources = wm831x_ldo10_resources, }, { .name = "wm831x-alive-ldo", .id = 11, .num_resources = ARRAY_SIZE(wm831x_ldo11_resources), .resources = wm831x_ldo11_resources, }, { .name = "wm831x-on", .num_resources = ARRAY_SIZE(wm831x_on_resources), .resources = wm831x_on_resources, }, { .name = "wm831x-status", .id = 1, .num_resources = ARRAY_SIZE(wm831x_status1_resources), .resources = wm831x_status1_resources, }, { .name = "wm831x-status", .id = 2, .num_resources = ARRAY_SIZE(wm831x_status2_resources), .resources = wm831x_status2_resources, }, { .name = "wm831x-watchdog", .num_resources = ARRAY_SIZE(wm831x_wdt_resources), .resources = wm831x_wdt_resources, }, }; static struct mfd_cell touch_devs[] = { { .name = "wm831x-touch", .num_resources = ARRAY_SIZE(wm831x_touch_resources), .resources = wm831x_touch_resources, }, }; static struct mfd_cell rtc_devs[] = { { .name = "wm831x-rtc", .num_resources = ARRAY_SIZE(wm831x_rtc_resources), .resources = wm831x_rtc_resources, }, }; static struct mfd_cell backlight_devs[] = { { .name = "wm831x-backlight", }, }; /* * Instantiate the generic non-control parts of the device. */ int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq) { struct wm831x_pdata *pdata = wm831x->dev->platform_data; int rev, wm831x_num; enum wm831x_parent parent; int ret, i; mutex_init(&wm831x->io_lock); mutex_init(&wm831x->key_lock); mutex_init(&wm831x->auxadc_lock); init_completion(&wm831x->auxadc_done); dev_set_drvdata(wm831x->dev, wm831x); ret = wm831x_reg_read(wm831x, WM831X_PARENT_ID); if (ret < 0) { dev_err(wm831x->dev, "Failed to read parent ID: %d\n", ret); goto err; } switch (ret) { case 0x6204: case 0x6246: break; default: dev_err(wm831x->dev, "Device is not a WM831x: ID %x\n", ret); ret = -EINVAL; goto err; } ret = wm831x_reg_read(wm831x, WM831X_REVISION); if (ret < 0) { dev_err(wm831x->dev, "Failed to read revision: %d\n", ret); goto err; } rev = (ret & WM831X_PARENT_REV_MASK) >> WM831X_PARENT_REV_SHIFT; ret = wm831x_reg_read(wm831x, WM831X_RESET_ID); if (ret < 0) { dev_err(wm831x->dev, "Failed to read device ID: %d\n", ret); goto err; } /* Some engineering samples do not have the ID set, rely on * the device being registered correctly. */ if (ret == 0) { dev_info(wm831x->dev, "Device is an engineering sample\n"); ret = id; } switch (ret) { case WM8310: parent = WM8310; wm831x->num_gpio = 16; wm831x->charger_irq_wake = 1; if (rev > 0) { wm831x->has_gpio_ena = 1; wm831x->has_cs_sts = 1; } dev_info(wm831x->dev, "WM8310 revision %c\n", 'A' + rev); break; case WM8311: parent = WM8311; wm831x->num_gpio = 16; wm831x->charger_irq_wake = 1; if (rev > 0) { wm831x->has_gpio_ena = 1; wm831x->has_cs_sts = 1; } dev_info(wm831x->dev, "WM8311 revision %c\n", 'A' + rev); break; case WM8312: parent = WM8312; wm831x->num_gpio = 16; wm831x->charger_irq_wake = 1; if (rev > 0) { wm831x->has_gpio_ena = 1; wm831x->has_cs_sts = 1; } dev_info(wm831x->dev, "WM8312 revision %c\n", 'A' + rev); break; case WM8320: parent = WM8320; wm831x->num_gpio = 12; dev_info(wm831x->dev, "WM8320 revision %c\n", 'A' + rev); break; case WM8321: parent = WM8321; wm831x->num_gpio = 12; dev_info(wm831x->dev, "WM8321 revision %c\n", 'A' + rev); break; case WM8325: parent = WM8325; wm831x->num_gpio = 12; dev_info(wm831x->dev, "WM8325 revision %c\n", 'A' + rev); break; case WM8326: parent = WM8326; wm831x->num_gpio = 12; dev_info(wm831x->dev, "WM8326 revision %c\n", 'A' + rev); break; default: dev_err(wm831x->dev, "Unknown WM831x device %04x\n", ret); ret = -EINVAL; goto err; } /* This will need revisiting in future but is OK for all * current parts. */ if (parent != id) dev_warn(wm831x->dev, "Device was registered as a WM%lx\n", id); /* Bootstrap the user key */ ret = wm831x_reg_read(wm831x, WM831X_SECURITY_KEY); if (ret < 0) { dev_err(wm831x->dev, "Failed to read security key: %d\n", ret); goto err; } if (ret != 0) { dev_warn(wm831x->dev, "Security key had non-zero value %x\n", ret); wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0); } wm831x->locked = 1; if (pdata && pdata->pre_init) { ret = pdata->pre_init(wm831x); if (ret != 0) { dev_err(wm831x->dev, "pre_init() failed: %d\n", ret); goto err; } } if (pdata) { for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) { if (!pdata->gpio_defaults[i]) continue; wm831x_reg_write(wm831x, WM831X_GPIO1_CONTROL + i, pdata->gpio_defaults[i] & 0xffff); } } /* Multiply by 10 as we have many subdevices of the same type */ if (pdata && pdata->wm831x_num) wm831x_num = pdata->wm831x_num * 10; else wm831x_num = -1; ret = wm831x_irq_init(wm831x, irq); if (ret != 0) goto err; if (wm831x->irq_base) { ret = request_threaded_irq(wm831x->irq_base + WM831X_IRQ_AUXADC_DATA, NULL, wm831x_auxadc_irq, 0, "auxadc", wm831x); if (ret < 0) dev_err(wm831x->dev, "AUXADC IRQ request failed: %d\n", ret); } /* The core device is up, instantiate the subdevices. */ switch (parent) { case WM8310: ret = mfd_add_devices(wm831x->dev, wm831x_num, wm8310_devs, ARRAY_SIZE(wm8310_devs), NULL, wm831x->irq_base); break; case WM8311: ret = mfd_add_devices(wm831x->dev, wm831x_num, wm8311_devs, ARRAY_SIZE(wm8311_devs), NULL, wm831x->irq_base); if (!pdata || !pdata->disable_touch) mfd_add_devices(wm831x->dev, wm831x_num, touch_devs, ARRAY_SIZE(touch_devs), NULL, wm831x->irq_base); break; case WM8312: ret = mfd_add_devices(wm831x->dev, wm831x_num, wm8312_devs, ARRAY_SIZE(wm8312_devs), NULL, wm831x->irq_base); if (!pdata || !pdata->disable_touch) mfd_add_devices(wm831x->dev, wm831x_num, touch_devs, ARRAY_SIZE(touch_devs), NULL, wm831x->irq_base); break; case WM8320: case WM8321: case WM8325: case WM8326: ret = mfd_add_devices(wm831x->dev, wm831x_num, wm8320_devs, ARRAY_SIZE(wm8320_devs), NULL, wm831x->irq_base); break; default: /* If this happens the bus probe function is buggy */ BUG(); } if (ret != 0) { dev_err(wm831x->dev, "Failed to add children\n"); goto err_irq; } /* The RTC can only be used if the 32.768kHz crystal is * enabled; this can't be controlled by software at runtime. */ ret = wm831x_reg_read(wm831x, WM831X_CLOCK_CONTROL_2); if (ret < 0) { dev_err(wm831x->dev, "Failed to read clock status: %d\n", ret); goto err_irq; } if (ret & WM831X_XTAL_ENA) { ret = mfd_add_devices(wm831x->dev, wm831x_num, rtc_devs, ARRAY_SIZE(rtc_devs), NULL, wm831x->irq_base); if (ret != 0) { dev_err(wm831x->dev, "Failed to add RTC: %d\n", ret); goto err_irq; } } else { dev_info(wm831x->dev, "32.768kHz clock disabled, no RTC\n"); } if (pdata && pdata->backlight) { /* Treat errors as non-critical */ ret = mfd_add_devices(wm831x->dev, wm831x_num, backlight_devs, ARRAY_SIZE(backlight_devs), NULL, wm831x->irq_base); if (ret < 0) dev_err(wm831x->dev, "Failed to add backlight: %d\n", ret); } wm831x_otp_init(wm831x); if (pdata && pdata->post_init) { ret = pdata->post_init(wm831x); if (ret != 0) { dev_err(wm831x->dev, "post_init() failed: %d\n", ret); goto err_irq; } } return 0; err_irq: wm831x_irq_exit(wm831x); err: mfd_remove_devices(wm831x->dev); kfree(wm831x); return ret; } void wm831x_device_exit(struct wm831x *wm831x) { wm831x_otp_exit(wm831x); mfd_remove_devices(wm831x->dev); if (wm831x->irq_base) free_irq(wm831x->irq_base + WM831X_IRQ_AUXADC_DATA, wm831x); wm831x_irq_exit(wm831x); kfree(wm831x); } int wm831x_device_suspend(struct wm831x *wm831x) { int reg, mask; /* If the charger IRQs are a wake source then make sure we ack * them even if they're not actively being used (eg, no power * driver or no IRQ line wired up) then acknowledge the * interrupts otherwise suspend won't last very long. */ if (wm831x->charger_irq_wake) { reg = wm831x_reg_read(wm831x, WM831X_INTERRUPT_STATUS_2_MASK); mask = WM831X_CHG_BATT_HOT_EINT | WM831X_CHG_BATT_COLD_EINT | WM831X_CHG_BATT_FAIL_EINT | WM831X_CHG_OV_EINT | WM831X_CHG_END_EINT | WM831X_CHG_TO_EINT | WM831X_CHG_MODE_EINT | WM831X_CHG_START_EINT; /* If any of the interrupts are masked read the statuses */ if (reg & mask) reg = wm831x_reg_read(wm831x, WM831X_INTERRUPT_STATUS_2); if (reg & mask) { dev_info(wm831x->dev, "Acknowledging masked charger IRQs: %x\n", reg & mask); wm831x_reg_write(wm831x, WM831X_INTERRUPT_STATUS_2, reg & mask); } } return 0; } MODULE_DESCRIPTION("Core support for the WM831X AudioPlus PMIC"); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Mark Brown");