diff options
Diffstat (limited to 'drivers/i2c/chips')
-rw-r--r-- | drivers/i2c/chips/Kconfig | 11 | ||||
-rw-r--r-- | drivers/i2c/chips/Makefile | 1 | ||||
-rw-r--r-- | drivers/i2c/chips/at24.c | 1 | ||||
-rw-r--r-- | drivers/i2c/chips/ds1682.c | 1 | ||||
-rw-r--r-- | drivers/i2c/chips/mcu_mpc8349emitx.c | 209 | ||||
-rw-r--r-- | drivers/i2c/chips/menelaus.c | 34 |
6 files changed, 238 insertions, 19 deletions
diff --git a/drivers/i2c/chips/Kconfig b/drivers/i2c/chips/Kconfig index a95cb9465d6..17356827b93 100644 --- a/drivers/i2c/chips/Kconfig +++ b/drivers/i2c/chips/Kconfig @@ -172,4 +172,15 @@ config MENELAUS and other features that are often used in portable devices like cell phones and PDAs. +config MCU_MPC8349EMITX + tristate "MPC8349E-mITX MCU driver" + depends on I2C && PPC_83xx + select GENERIC_GPIO + select ARCH_REQUIRE_GPIOLIB + help + Say Y here to enable soft power-off functionality on the Freescale + boards with the MPC8349E-mITX-compatible MCU chips. This driver will + also register MCU GPIOs with the generic GPIO API, so you'll able + to use MCU pins as GPIOs. + endmenu diff --git a/drivers/i2c/chips/Makefile b/drivers/i2c/chips/Makefile index 39e3e69ed12..ca520fa143d 100644 --- a/drivers/i2c/chips/Makefile +++ b/drivers/i2c/chips/Makefile @@ -21,6 +21,7 @@ obj-$(CONFIG_ISP1301_OMAP) += isp1301_omap.o obj-$(CONFIG_TPS65010) += tps65010.o obj-$(CONFIG_MENELAUS) += menelaus.o obj-$(CONFIG_SENSORS_TSL2550) += tsl2550.o +obj-$(CONFIG_MCU_MPC8349EMITX) += mcu_mpc8349emitx.o ifeq ($(CONFIG_I2C_DEBUG_CHIP),y) EXTRA_CFLAGS += -DDEBUG diff --git a/drivers/i2c/chips/at24.c b/drivers/i2c/chips/at24.c index 2a4acb26956..d4775528abc 100644 --- a/drivers/i2c/chips/at24.c +++ b/drivers/i2c/chips/at24.c @@ -460,7 +460,6 @@ static int at24_probe(struct i2c_client *client, const struct i2c_device_id *id) */ at24->bin.attr.name = "eeprom"; at24->bin.attr.mode = chip.flags & AT24_FLAG_IRUGO ? S_IRUGO : S_IRUSR; - at24->bin.attr.owner = THIS_MODULE; at24->bin.read = at24_bin_read; at24->bin.size = chip.byte_len; diff --git a/drivers/i2c/chips/ds1682.c b/drivers/i2c/chips/ds1682.c index 23be4d42cb0..f3ee4a1abb7 100644 --- a/drivers/i2c/chips/ds1682.c +++ b/drivers/i2c/chips/ds1682.c @@ -190,7 +190,6 @@ static struct bin_attribute ds1682_eeprom_attr = { .attr = { .name = "eeprom", .mode = S_IRUGO | S_IWUSR, - .owner = THIS_MODULE, }, .size = DS1682_EEPROM_SIZE, .read = ds1682_eeprom_read, diff --git a/drivers/i2c/chips/mcu_mpc8349emitx.c b/drivers/i2c/chips/mcu_mpc8349emitx.c new file mode 100644 index 00000000000..82a9bcb858b --- /dev/null +++ b/drivers/i2c/chips/mcu_mpc8349emitx.c @@ -0,0 +1,209 @@ +/* + * Power Management and GPIO expander driver for MPC8349E-mITX-compatible MCU + * + * Copyright (c) 2008 MontaVista Software, Inc. + * + * Author: Anton Vorontsov <avorontsov@ru.mvista.com> + * + * 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 <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/device.h> +#include <linux/mutex.h> +#include <linux/i2c.h> +#include <linux/gpio.h> +#include <linux/of.h> +#include <linux/of_gpio.h> +#include <asm/prom.h> +#include <asm/machdep.h> + +/* + * I don't have specifications for the MCU firmware, I found this register + * and bits positions by the trial&error method. + */ +#define MCU_REG_CTRL 0x20 +#define MCU_CTRL_POFF 0x40 + +#define MCU_NUM_GPIO 2 + +struct mcu { + struct mutex lock; + struct device_node *np; + struct i2c_client *client; + struct of_gpio_chip of_gc; + u8 reg_ctrl; +}; + +static struct mcu *glob_mcu; + +static void mcu_power_off(void) +{ + struct mcu *mcu = glob_mcu; + + pr_info("Sending power-off request to the MCU...\n"); + mutex_lock(&mcu->lock); + i2c_smbus_write_byte_data(glob_mcu->client, MCU_REG_CTRL, + mcu->reg_ctrl | MCU_CTRL_POFF); + mutex_unlock(&mcu->lock); +} + +static void mcu_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val) +{ + struct of_gpio_chip *of_gc = to_of_gpio_chip(gc); + struct mcu *mcu = container_of(of_gc, struct mcu, of_gc); + u8 bit = 1 << (4 + gpio); + + mutex_lock(&mcu->lock); + if (val) + mcu->reg_ctrl &= ~bit; + else + mcu->reg_ctrl |= bit; + + i2c_smbus_write_byte_data(mcu->client, MCU_REG_CTRL, mcu->reg_ctrl); + mutex_unlock(&mcu->lock); +} + +static int mcu_gpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val) +{ + mcu_gpio_set(gc, gpio, val); + return 0; +} + +static int mcu_gpiochip_add(struct mcu *mcu) +{ + struct device_node *np; + struct of_gpio_chip *of_gc = &mcu->of_gc; + struct gpio_chip *gc = &of_gc->gc; + int ret; + + np = of_find_compatible_node(NULL, NULL, "fsl,mcu-mpc8349emitx"); + if (!np) + return -ENODEV; + + gc->owner = THIS_MODULE; + gc->label = np->full_name; + gc->can_sleep = 1; + gc->ngpio = MCU_NUM_GPIO; + gc->base = -1; + gc->set = mcu_gpio_set; + gc->direction_output = mcu_gpio_dir_out; + of_gc->gpio_cells = 2; + of_gc->xlate = of_gpio_simple_xlate; + + np->data = of_gc; + mcu->np = np; + + /* + * We don't want to lose the node, its ->data and ->full_name... + * So, if succeeded, we don't put the node here. + */ + ret = gpiochip_add(gc); + if (ret) + of_node_put(np); + return ret; +} + +static int mcu_gpiochip_remove(struct mcu *mcu) +{ + int ret; + + ret = gpiochip_remove(&mcu->of_gc.gc); + if (ret) + return ret; + of_node_put(mcu->np); + + return 0; +} + +static int __devinit mcu_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct mcu *mcu; + int ret; + + mcu = kzalloc(sizeof(*mcu), GFP_KERNEL); + if (!mcu) + return -ENOMEM; + + mutex_init(&mcu->lock); + mcu->client = client; + i2c_set_clientdata(client, mcu); + + ret = i2c_smbus_read_byte_data(mcu->client, MCU_REG_CTRL); + if (ret < 0) + goto err; + mcu->reg_ctrl = ret; + + ret = mcu_gpiochip_add(mcu); + if (ret) + goto err; + + /* XXX: this is potentially racy, but there is no lock for ppc_md */ + if (!ppc_md.power_off) { + glob_mcu = mcu; + ppc_md.power_off = mcu_power_off; + dev_info(&client->dev, "will provide power-off service\n"); + } + + return 0; +err: + kfree(mcu); + return ret; +} + +static int __devexit mcu_remove(struct i2c_client *client) +{ + struct mcu *mcu = i2c_get_clientdata(client); + int ret; + + if (glob_mcu == mcu) { + ppc_md.power_off = NULL; + glob_mcu = NULL; + } + + ret = mcu_gpiochip_remove(mcu); + if (ret) + return ret; + i2c_set_clientdata(client, NULL); + kfree(mcu); + return 0; +} + +static const struct i2c_device_id mcu_ids[] = { + { "mcu-mpc8349emitx", }, + {}, +}; +MODULE_DEVICE_TABLE(i2c, mcu_ids); + +static struct i2c_driver mcu_driver = { + .driver = { + .name = "mcu-mpc8349emitx", + .owner = THIS_MODULE, + }, + .probe = mcu_probe, + .remove = __devexit_p(mcu_remove), + .id_table = mcu_ids, +}; + +static int __init mcu_init(void) +{ + return i2c_add_driver(&mcu_driver); +} +module_init(mcu_init); + +static void __exit mcu_exit(void) +{ + i2c_del_driver(&mcu_driver); +} +module_exit(mcu_exit); + +MODULE_DESCRIPTION("Power Management and GPIO expander driver for " + "MPC8349E-mITX-compatible MCU"); +MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/i2c/chips/menelaus.c b/drivers/i2c/chips/menelaus.c index 176126d3a01..4b364bae6b3 100644 --- a/drivers/i2c/chips/menelaus.c +++ b/drivers/i2c/chips/menelaus.c @@ -832,52 +832,52 @@ static irqreturn_t menelaus_irq(int irq, void *_menelaus) static void menelaus_to_time(char *regs, struct rtc_time *t) { - t->tm_sec = BCD2BIN(regs[0]); - t->tm_min = BCD2BIN(regs[1]); + t->tm_sec = bcd2bin(regs[0]); + t->tm_min = bcd2bin(regs[1]); if (the_menelaus->rtc_control & RTC_CTRL_MODE12) { - t->tm_hour = BCD2BIN(regs[2] & 0x1f) - 1; + t->tm_hour = bcd2bin(regs[2] & 0x1f) - 1; if (regs[2] & RTC_HR_PM) t->tm_hour += 12; } else - t->tm_hour = BCD2BIN(regs[2] & 0x3f); - t->tm_mday = BCD2BIN(regs[3]); - t->tm_mon = BCD2BIN(regs[4]) - 1; - t->tm_year = BCD2BIN(regs[5]) + 100; + t->tm_hour = bcd2bin(regs[2] & 0x3f); + t->tm_mday = bcd2bin(regs[3]); + t->tm_mon = bcd2bin(regs[4]) - 1; + t->tm_year = bcd2bin(regs[5]) + 100; } static int time_to_menelaus(struct rtc_time *t, int regnum) { int hour, status; - status = menelaus_write_reg(regnum++, BIN2BCD(t->tm_sec)); + status = menelaus_write_reg(regnum++, bin2bcd(t->tm_sec)); if (status < 0) goto fail; - status = menelaus_write_reg(regnum++, BIN2BCD(t->tm_min)); + status = menelaus_write_reg(regnum++, bin2bcd(t->tm_min)); if (status < 0) goto fail; if (the_menelaus->rtc_control & RTC_CTRL_MODE12) { hour = t->tm_hour + 1; if (hour > 12) - hour = RTC_HR_PM | BIN2BCD(hour - 12); + hour = RTC_HR_PM | bin2bcd(hour - 12); else - hour = BIN2BCD(hour); + hour = bin2bcd(hour); } else - hour = BIN2BCD(t->tm_hour); + hour = bin2bcd(t->tm_hour); status = menelaus_write_reg(regnum++, hour); if (status < 0) goto fail; - status = menelaus_write_reg(regnum++, BIN2BCD(t->tm_mday)); + status = menelaus_write_reg(regnum++, bin2bcd(t->tm_mday)); if (status < 0) goto fail; - status = menelaus_write_reg(regnum++, BIN2BCD(t->tm_mon + 1)); + status = menelaus_write_reg(regnum++, bin2bcd(t->tm_mon + 1)); if (status < 0) goto fail; - status = menelaus_write_reg(regnum++, BIN2BCD(t->tm_year - 100)); + status = menelaus_write_reg(regnum++, bin2bcd(t->tm_year - 100)); if (status < 0) goto fail; @@ -914,7 +914,7 @@ static int menelaus_read_time(struct device *dev, struct rtc_time *t) } menelaus_to_time(regs, t); - t->tm_wday = BCD2BIN(regs[6]); + t->tm_wday = bcd2bin(regs[6]); return 0; } @@ -927,7 +927,7 @@ static int menelaus_set_time(struct device *dev, struct rtc_time *t) status = time_to_menelaus(t, MENELAUS_RTC_SEC); if (status < 0) return status; - status = menelaus_write_reg(MENELAUS_RTC_WKDAY, BIN2BCD(t->tm_wday)); + status = menelaus_write_reg(MENELAUS_RTC_WKDAY, bin2bcd(t->tm_wday)); if (status < 0) { dev_err(&the_menelaus->client->dev, "rtc write reg %02x " "err %d\n", MENELAUS_RTC_WKDAY, status); |