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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 19:29:37 +00:00
![Linus Torvalds](/assets/img/avatar_default.png)
Here's the large driver core updates for 3.8-rc1. The biggest thing here is the various __dev* marking removals. This is going to be a pain for the merge with different subsystem trees, I know, but all of the patches included here have been ACKed by their various subsystem maintainers, as they wanted them to go through here. If this is too much of a pain, I can pull all of them out of this tree and just send you one with the other fixes/updates and then, after 3.8-rc1 is out, do the rest of the removals to ensure we catch them all, it's up to you. The merges should all be trivial, and Stephen has been doing them all in linux-next for a few weeks now quite easily. Other than the __dev* marking removals, there's nothing major here, some firmware loading updates and other minor things in the driver core. All of these have (much to Stephen's annoyance), been in linux-next for a while. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.19 (GNU/Linux) iEYEABECAAYFAlDHkPkACgkQMUfUDdst+ykaWgCfW7AM30cv0nzoVO08ax6KjlG1 KVYAn3z/KYazvp4B6LMvrW9y0G34Wmad =yvVr -----END PGP SIGNATURE----- Merge tag 'driver-core-3.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core Pull driver core updates from Greg Kroah-Hartman: "Here's the large driver core updates for 3.8-rc1. The biggest thing here is the various __dev* marking removals. This is going to be a pain for the merge with different subsystem trees, I know, but all of the patches included here have been ACKed by their various subsystem maintainers, as they wanted them to go through here. If this is too much of a pain, I can pull all of them out of this tree and just send you one with the other fixes/updates and then, after 3.8-rc1 is out, do the rest of the removals to ensure we catch them all, it's up to you. The merges should all be trivial, and Stephen has been doing them all in linux-next for a few weeks now quite easily. Other than the __dev* marking removals, there's nothing major here, some firmware loading updates and other minor things in the driver core. All of these have (much to Stephen's annoyance), been in linux-next for a while. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>" Fixed up trivial conflicts in drivers/gpio/gpio-{em,stmpe}.c due to gpio update. * tag 'driver-core-3.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (93 commits) modpost.c: Stop checking __dev* section mismatches init.h: Remove __dev* sections from the kernel acpi: remove use of __devinit PCI: Remove __dev* markings PCI: Always build setup-bus when PCI is enabled PCI: Move pci_uevent into pci-driver.c PCI: Remove CONFIG_HOTPLUG ifdefs unicore32/PCI: Remove CONFIG_HOTPLUG ifdefs sh/PCI: Remove CONFIG_HOTPLUG ifdefs powerpc/PCI: Remove CONFIG_HOTPLUG ifdefs mips/PCI: Remove CONFIG_HOTPLUG ifdefs microblaze/PCI: Remove CONFIG_HOTPLUG ifdefs dma: remove use of __devinit dma: remove use of __devexit_p firewire: remove use of __devinitdata firewire: remove use of __devinit leds: remove use of __devexit leds: remove use of __devinit leds: remove use of __devexit_p mmc: remove use of __devexit ...
823 lines
18 KiB
C
823 lines
18 KiB
C
/*
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* PCA953x 4/8/16 bit I/O ports
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*
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* Copyright (C) 2005 Ben Gardner <bgardner@wabtec.com>
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* Copyright (C) 2007 Marvell International Ltd.
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*
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* Derived from drivers/i2c/chips/pca9539.c
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/gpio.h>
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/irqdomain.h>
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#include <linux/i2c.h>
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#include <linux/i2c/pca953x.h>
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#include <linux/slab.h>
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#ifdef CONFIG_OF_GPIO
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#include <linux/of_platform.h>
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#endif
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#define PCA953X_INPUT 0
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#define PCA953X_OUTPUT 1
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#define PCA953X_INVERT 2
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#define PCA953X_DIRECTION 3
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#define REG_ADDR_AI 0x80
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#define PCA957X_IN 0
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#define PCA957X_INVRT 1
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#define PCA957X_BKEN 2
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#define PCA957X_PUPD 3
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#define PCA957X_CFG 4
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#define PCA957X_OUT 5
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#define PCA957X_MSK 6
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#define PCA957X_INTS 7
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#define PCA_GPIO_MASK 0x00FF
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#define PCA_INT 0x0100
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#define PCA953X_TYPE 0x1000
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#define PCA957X_TYPE 0x2000
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static const struct i2c_device_id pca953x_id[] = {
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{ "pca9534", 8 | PCA953X_TYPE | PCA_INT, },
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{ "pca9535", 16 | PCA953X_TYPE | PCA_INT, },
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{ "pca9536", 4 | PCA953X_TYPE, },
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{ "pca9537", 4 | PCA953X_TYPE | PCA_INT, },
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{ "pca9538", 8 | PCA953X_TYPE | PCA_INT, },
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{ "pca9539", 16 | PCA953X_TYPE | PCA_INT, },
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{ "pca9554", 8 | PCA953X_TYPE | PCA_INT, },
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{ "pca9555", 16 | PCA953X_TYPE | PCA_INT, },
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{ "pca9556", 8 | PCA953X_TYPE, },
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{ "pca9557", 8 | PCA953X_TYPE, },
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{ "pca9574", 8 | PCA957X_TYPE | PCA_INT, },
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{ "pca9575", 16 | PCA957X_TYPE | PCA_INT, },
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{ "max7310", 8 | PCA953X_TYPE, },
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{ "max7312", 16 | PCA953X_TYPE | PCA_INT, },
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{ "max7313", 16 | PCA953X_TYPE | PCA_INT, },
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{ "max7315", 8 | PCA953X_TYPE | PCA_INT, },
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{ "pca6107", 8 | PCA953X_TYPE | PCA_INT, },
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{ "tca6408", 8 | PCA953X_TYPE | PCA_INT, },
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{ "tca6416", 16 | PCA953X_TYPE | PCA_INT, },
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{ "tca6424", 24 | PCA953X_TYPE | PCA_INT, },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, pca953x_id);
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struct pca953x_chip {
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unsigned gpio_start;
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u32 reg_output;
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u32 reg_direction;
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struct mutex i2c_lock;
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#ifdef CONFIG_GPIO_PCA953X_IRQ
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struct mutex irq_lock;
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u32 irq_mask;
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u32 irq_stat;
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u32 irq_trig_raise;
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u32 irq_trig_fall;
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int irq_base;
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struct irq_domain *domain;
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#endif
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struct i2c_client *client;
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struct gpio_chip gpio_chip;
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const char *const *names;
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int chip_type;
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};
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static int pca953x_write_reg(struct pca953x_chip *chip, int reg, u32 val)
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{
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int ret = 0;
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if (chip->gpio_chip.ngpio <= 8)
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ret = i2c_smbus_write_byte_data(chip->client, reg, val);
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else if (chip->gpio_chip.ngpio == 24) {
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cpu_to_le32s(&val);
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ret = i2c_smbus_write_i2c_block_data(chip->client,
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(reg << 2) | REG_ADDR_AI,
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3,
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(u8 *) &val);
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}
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else {
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switch (chip->chip_type) {
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case PCA953X_TYPE:
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ret = i2c_smbus_write_word_data(chip->client,
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reg << 1, val);
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break;
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case PCA957X_TYPE:
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ret = i2c_smbus_write_byte_data(chip->client, reg << 1,
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val & 0xff);
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if (ret < 0)
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break;
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ret = i2c_smbus_write_byte_data(chip->client,
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(reg << 1) + 1,
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(val & 0xff00) >> 8);
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break;
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}
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}
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if (ret < 0) {
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dev_err(&chip->client->dev, "failed writing register\n");
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return ret;
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}
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return 0;
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}
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static int pca953x_read_reg(struct pca953x_chip *chip, int reg, u32 *val)
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{
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int ret;
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if (chip->gpio_chip.ngpio <= 8) {
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ret = i2c_smbus_read_byte_data(chip->client, reg);
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*val = ret;
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}
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else if (chip->gpio_chip.ngpio == 24) {
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*val = 0;
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ret = i2c_smbus_read_i2c_block_data(chip->client,
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(reg << 2) | REG_ADDR_AI,
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3,
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(u8 *) val);
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le32_to_cpus(val);
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} else {
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ret = i2c_smbus_read_word_data(chip->client, reg << 1);
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*val = ret;
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}
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if (ret < 0) {
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dev_err(&chip->client->dev, "failed reading register\n");
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return ret;
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}
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return 0;
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}
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static int pca953x_gpio_direction_input(struct gpio_chip *gc, unsigned off)
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{
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struct pca953x_chip *chip;
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uint reg_val;
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int ret, offset = 0;
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chip = container_of(gc, struct pca953x_chip, gpio_chip);
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mutex_lock(&chip->i2c_lock);
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reg_val = chip->reg_direction | (1u << off);
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switch (chip->chip_type) {
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case PCA953X_TYPE:
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offset = PCA953X_DIRECTION;
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break;
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case PCA957X_TYPE:
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offset = PCA957X_CFG;
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break;
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}
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ret = pca953x_write_reg(chip, offset, reg_val);
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if (ret)
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goto exit;
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chip->reg_direction = reg_val;
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ret = 0;
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exit:
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mutex_unlock(&chip->i2c_lock);
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return ret;
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}
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static int pca953x_gpio_direction_output(struct gpio_chip *gc,
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unsigned off, int val)
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{
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struct pca953x_chip *chip;
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uint reg_val;
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int ret, offset = 0;
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chip = container_of(gc, struct pca953x_chip, gpio_chip);
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mutex_lock(&chip->i2c_lock);
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/* set output level */
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if (val)
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reg_val = chip->reg_output | (1u << off);
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else
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reg_val = chip->reg_output & ~(1u << off);
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switch (chip->chip_type) {
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case PCA953X_TYPE:
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offset = PCA953X_OUTPUT;
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break;
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case PCA957X_TYPE:
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offset = PCA957X_OUT;
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break;
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}
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ret = pca953x_write_reg(chip, offset, reg_val);
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if (ret)
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goto exit;
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chip->reg_output = reg_val;
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/* then direction */
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reg_val = chip->reg_direction & ~(1u << off);
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switch (chip->chip_type) {
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case PCA953X_TYPE:
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offset = PCA953X_DIRECTION;
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break;
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case PCA957X_TYPE:
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offset = PCA957X_CFG;
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break;
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}
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ret = pca953x_write_reg(chip, offset, reg_val);
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if (ret)
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goto exit;
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chip->reg_direction = reg_val;
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ret = 0;
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exit:
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mutex_unlock(&chip->i2c_lock);
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return ret;
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}
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static int pca953x_gpio_get_value(struct gpio_chip *gc, unsigned off)
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{
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struct pca953x_chip *chip;
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u32 reg_val;
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int ret, offset = 0;
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chip = container_of(gc, struct pca953x_chip, gpio_chip);
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mutex_lock(&chip->i2c_lock);
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switch (chip->chip_type) {
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case PCA953X_TYPE:
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offset = PCA953X_INPUT;
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break;
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case PCA957X_TYPE:
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offset = PCA957X_IN;
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break;
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}
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ret = pca953x_read_reg(chip, offset, ®_val);
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mutex_unlock(&chip->i2c_lock);
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if (ret < 0) {
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/* NOTE: diagnostic already emitted; that's all we should
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* do unless gpio_*_value_cansleep() calls become different
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* from their nonsleeping siblings (and report faults).
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*/
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return 0;
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}
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return (reg_val & (1u << off)) ? 1 : 0;
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}
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static void pca953x_gpio_set_value(struct gpio_chip *gc, unsigned off, int val)
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{
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struct pca953x_chip *chip;
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u32 reg_val;
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int ret, offset = 0;
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chip = container_of(gc, struct pca953x_chip, gpio_chip);
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mutex_lock(&chip->i2c_lock);
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if (val)
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reg_val = chip->reg_output | (1u << off);
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else
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reg_val = chip->reg_output & ~(1u << off);
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switch (chip->chip_type) {
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case PCA953X_TYPE:
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offset = PCA953X_OUTPUT;
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break;
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case PCA957X_TYPE:
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offset = PCA957X_OUT;
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break;
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}
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ret = pca953x_write_reg(chip, offset, reg_val);
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if (ret)
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goto exit;
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chip->reg_output = reg_val;
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exit:
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mutex_unlock(&chip->i2c_lock);
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}
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static void pca953x_setup_gpio(struct pca953x_chip *chip, int gpios)
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{
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struct gpio_chip *gc;
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gc = &chip->gpio_chip;
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gc->direction_input = pca953x_gpio_direction_input;
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gc->direction_output = pca953x_gpio_direction_output;
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gc->get = pca953x_gpio_get_value;
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gc->set = pca953x_gpio_set_value;
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gc->can_sleep = 1;
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gc->base = chip->gpio_start;
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gc->ngpio = gpios;
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gc->label = chip->client->name;
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gc->dev = &chip->client->dev;
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gc->owner = THIS_MODULE;
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gc->names = chip->names;
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}
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#ifdef CONFIG_GPIO_PCA953X_IRQ
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static int pca953x_gpio_to_irq(struct gpio_chip *gc, unsigned off)
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{
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struct pca953x_chip *chip;
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chip = container_of(gc, struct pca953x_chip, gpio_chip);
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return chip->irq_base + off;
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}
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static void pca953x_irq_mask(struct irq_data *d)
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{
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struct pca953x_chip *chip = irq_data_get_irq_chip_data(d);
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chip->irq_mask &= ~(1 << d->hwirq);
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}
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static void pca953x_irq_unmask(struct irq_data *d)
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{
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struct pca953x_chip *chip = irq_data_get_irq_chip_data(d);
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chip->irq_mask |= 1 << d->hwirq;
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}
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static void pca953x_irq_bus_lock(struct irq_data *d)
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{
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struct pca953x_chip *chip = irq_data_get_irq_chip_data(d);
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mutex_lock(&chip->irq_lock);
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}
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static void pca953x_irq_bus_sync_unlock(struct irq_data *d)
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{
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struct pca953x_chip *chip = irq_data_get_irq_chip_data(d);
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u32 new_irqs;
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u32 level;
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/* Look for any newly setup interrupt */
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new_irqs = chip->irq_trig_fall | chip->irq_trig_raise;
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new_irqs &= ~chip->reg_direction;
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while (new_irqs) {
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level = __ffs(new_irqs);
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pca953x_gpio_direction_input(&chip->gpio_chip, level);
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new_irqs &= ~(1 << level);
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}
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mutex_unlock(&chip->irq_lock);
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}
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static int pca953x_irq_set_type(struct irq_data *d, unsigned int type)
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{
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struct pca953x_chip *chip = irq_data_get_irq_chip_data(d);
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u32 mask = 1 << d->hwirq;
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if (!(type & IRQ_TYPE_EDGE_BOTH)) {
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dev_err(&chip->client->dev, "irq %d: unsupported type %d\n",
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d->irq, type);
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return -EINVAL;
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}
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if (type & IRQ_TYPE_EDGE_FALLING)
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chip->irq_trig_fall |= mask;
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else
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chip->irq_trig_fall &= ~mask;
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if (type & IRQ_TYPE_EDGE_RISING)
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chip->irq_trig_raise |= mask;
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else
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chip->irq_trig_raise &= ~mask;
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return 0;
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}
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static struct irq_chip pca953x_irq_chip = {
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.name = "pca953x",
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.irq_mask = pca953x_irq_mask,
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.irq_unmask = pca953x_irq_unmask,
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.irq_bus_lock = pca953x_irq_bus_lock,
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.irq_bus_sync_unlock = pca953x_irq_bus_sync_unlock,
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.irq_set_type = pca953x_irq_set_type,
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};
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static u32 pca953x_irq_pending(struct pca953x_chip *chip)
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{
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u32 cur_stat;
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u32 old_stat;
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u32 pending;
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u32 trigger;
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int ret, offset = 0;
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|
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switch (chip->chip_type) {
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case PCA953X_TYPE:
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offset = PCA953X_INPUT;
|
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break;
|
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case PCA957X_TYPE:
|
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offset = PCA957X_IN;
|
|
break;
|
|
}
|
|
ret = pca953x_read_reg(chip, offset, &cur_stat);
|
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if (ret)
|
|
return 0;
|
|
|
|
/* Remove output pins from the equation */
|
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cur_stat &= chip->reg_direction;
|
|
|
|
old_stat = chip->irq_stat;
|
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trigger = (cur_stat ^ old_stat) & chip->irq_mask;
|
|
|
|
if (!trigger)
|
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return 0;
|
|
|
|
chip->irq_stat = cur_stat;
|
|
|
|
pending = (old_stat & chip->irq_trig_fall) |
|
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(cur_stat & chip->irq_trig_raise);
|
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pending &= trigger;
|
|
|
|
return pending;
|
|
}
|
|
|
|
static irqreturn_t pca953x_irq_handler(int irq, void *devid)
|
|
{
|
|
struct pca953x_chip *chip = devid;
|
|
u32 pending;
|
|
u32 level;
|
|
|
|
pending = pca953x_irq_pending(chip);
|
|
|
|
if (!pending)
|
|
return IRQ_HANDLED;
|
|
|
|
do {
|
|
level = __ffs(pending);
|
|
handle_nested_irq(irq_find_mapping(chip->domain, level));
|
|
|
|
pending &= ~(1 << level);
|
|
} while (pending);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int pca953x_irq_setup(struct pca953x_chip *chip,
|
|
const struct i2c_device_id *id,
|
|
int irq_base)
|
|
{
|
|
struct i2c_client *client = chip->client;
|
|
int ret, offset = 0;
|
|
u32 temporary;
|
|
|
|
if (irq_base != -1
|
|
&& (id->driver_data & PCA_INT)) {
|
|
int lvl;
|
|
|
|
switch (chip->chip_type) {
|
|
case PCA953X_TYPE:
|
|
offset = PCA953X_INPUT;
|
|
break;
|
|
case PCA957X_TYPE:
|
|
offset = PCA957X_IN;
|
|
break;
|
|
}
|
|
ret = pca953x_read_reg(chip, offset, &temporary);
|
|
chip->irq_stat = temporary;
|
|
if (ret)
|
|
goto out_failed;
|
|
|
|
/*
|
|
* There is no way to know which GPIO line generated the
|
|
* interrupt. We have to rely on the previous read for
|
|
* this purpose.
|
|
*/
|
|
chip->irq_stat &= chip->reg_direction;
|
|
mutex_init(&chip->irq_lock);
|
|
|
|
chip->irq_base = irq_alloc_descs(-1, irq_base, chip->gpio_chip.ngpio, -1);
|
|
if (chip->irq_base < 0)
|
|
goto out_failed;
|
|
|
|
chip->domain = irq_domain_add_legacy(client->dev.of_node,
|
|
chip->gpio_chip.ngpio,
|
|
chip->irq_base,
|
|
0,
|
|
&irq_domain_simple_ops,
|
|
NULL);
|
|
if (!chip->domain) {
|
|
ret = -ENODEV;
|
|
goto out_irqdesc_free;
|
|
}
|
|
|
|
for (lvl = 0; lvl < chip->gpio_chip.ngpio; lvl++) {
|
|
int irq = lvl + chip->irq_base;
|
|
|
|
irq_clear_status_flags(irq, IRQ_NOREQUEST);
|
|
irq_set_chip_data(irq, chip);
|
|
irq_set_chip(irq, &pca953x_irq_chip);
|
|
irq_set_nested_thread(irq, true);
|
|
#ifdef CONFIG_ARM
|
|
set_irq_flags(irq, IRQF_VALID);
|
|
#else
|
|
irq_set_noprobe(irq);
|
|
#endif
|
|
}
|
|
|
|
ret = request_threaded_irq(client->irq,
|
|
NULL,
|
|
pca953x_irq_handler,
|
|
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
|
|
dev_name(&client->dev), chip);
|
|
if (ret) {
|
|
dev_err(&client->dev, "failed to request irq %d\n",
|
|
client->irq);
|
|
goto out_irqdesc_free;
|
|
}
|
|
|
|
chip->gpio_chip.to_irq = pca953x_gpio_to_irq;
|
|
}
|
|
|
|
return 0;
|
|
|
|
out_irqdesc_free:
|
|
irq_free_descs(chip->irq_base, chip->gpio_chip.ngpio);
|
|
out_failed:
|
|
chip->irq_base = -1;
|
|
return ret;
|
|
}
|
|
|
|
static void pca953x_irq_teardown(struct pca953x_chip *chip)
|
|
{
|
|
if (chip->irq_base != -1) {
|
|
irq_free_descs(chip->irq_base, chip->gpio_chip.ngpio);
|
|
free_irq(chip->client->irq, chip);
|
|
}
|
|
}
|
|
#else /* CONFIG_GPIO_PCA953X_IRQ */
|
|
static int pca953x_irq_setup(struct pca953x_chip *chip,
|
|
const struct i2c_device_id *id,
|
|
int irq_base)
|
|
{
|
|
struct i2c_client *client = chip->client;
|
|
|
|
if (irq_base != -1 && (id->driver_data & PCA_INT))
|
|
dev_warn(&client->dev, "interrupt support not compiled in\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void pca953x_irq_teardown(struct pca953x_chip *chip)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Handlers for alternative sources of platform_data
|
|
*/
|
|
#ifdef CONFIG_OF_GPIO
|
|
/*
|
|
* Translate OpenFirmware node properties into platform_data
|
|
* WARNING: This is DEPRECATED and will be removed eventually!
|
|
*/
|
|
static void
|
|
pca953x_get_alt_pdata(struct i2c_client *client, int *gpio_base, u32 *invert)
|
|
{
|
|
struct device_node *node;
|
|
const __be32 *val;
|
|
int size;
|
|
|
|
node = client->dev.of_node;
|
|
if (node == NULL)
|
|
return;
|
|
|
|
*gpio_base = -1;
|
|
val = of_get_property(node, "linux,gpio-base", &size);
|
|
WARN(val, "%s: device-tree property 'linux,gpio-base' is deprecated!", __func__);
|
|
if (val) {
|
|
if (size != sizeof(*val))
|
|
dev_warn(&client->dev, "%s: wrong linux,gpio-base\n",
|
|
node->full_name);
|
|
else
|
|
*gpio_base = be32_to_cpup(val);
|
|
}
|
|
|
|
val = of_get_property(node, "polarity", NULL);
|
|
WARN(val, "%s: device-tree property 'polarity' is deprecated!", __func__);
|
|
if (val)
|
|
*invert = *val;
|
|
}
|
|
#else
|
|
static void
|
|
pca953x_get_alt_pdata(struct i2c_client *client, int *gpio_base, u32 *invert)
|
|
{
|
|
*gpio_base = -1;
|
|
}
|
|
#endif
|
|
|
|
static int device_pca953x_init(struct pca953x_chip *chip, u32 invert)
|
|
{
|
|
int ret;
|
|
|
|
ret = pca953x_read_reg(chip, PCA953X_OUTPUT, &chip->reg_output);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = pca953x_read_reg(chip, PCA953X_DIRECTION,
|
|
&chip->reg_direction);
|
|
if (ret)
|
|
goto out;
|
|
|
|
/* set platform specific polarity inversion */
|
|
ret = pca953x_write_reg(chip, PCA953X_INVERT, invert);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int device_pca957x_init(struct pca953x_chip *chip, u32 invert)
|
|
{
|
|
int ret;
|
|
u32 val = 0;
|
|
|
|
/* Let every port in proper state, that could save power */
|
|
pca953x_write_reg(chip, PCA957X_PUPD, 0x0);
|
|
pca953x_write_reg(chip, PCA957X_CFG, 0xffff);
|
|
pca953x_write_reg(chip, PCA957X_OUT, 0x0);
|
|
|
|
ret = pca953x_read_reg(chip, PCA957X_IN, &val);
|
|
if (ret)
|
|
goto out;
|
|
ret = pca953x_read_reg(chip, PCA957X_OUT, &chip->reg_output);
|
|
if (ret)
|
|
goto out;
|
|
ret = pca953x_read_reg(chip, PCA957X_CFG, &chip->reg_direction);
|
|
if (ret)
|
|
goto out;
|
|
|
|
/* set platform specific polarity inversion */
|
|
pca953x_write_reg(chip, PCA957X_INVRT, invert);
|
|
|
|
/* To enable register 6, 7 to controll pull up and pull down */
|
|
pca953x_write_reg(chip, PCA957X_BKEN, 0x202);
|
|
|
|
return 0;
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int pca953x_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct pca953x_platform_data *pdata;
|
|
struct pca953x_chip *chip;
|
|
int irq_base = 0;
|
|
int ret;
|
|
u32 invert = 0;
|
|
|
|
chip = kzalloc(sizeof(struct pca953x_chip), GFP_KERNEL);
|
|
if (chip == NULL)
|
|
return -ENOMEM;
|
|
|
|
pdata = client->dev.platform_data;
|
|
if (pdata) {
|
|
irq_base = pdata->irq_base;
|
|
chip->gpio_start = pdata->gpio_base;
|
|
invert = pdata->invert;
|
|
chip->names = pdata->names;
|
|
} else {
|
|
pca953x_get_alt_pdata(client, &chip->gpio_start, &invert);
|
|
#ifdef CONFIG_OF_GPIO
|
|
/* If I2C node has no interrupts property, disable GPIO interrupts */
|
|
if (of_find_property(client->dev.of_node, "interrupts", NULL) == NULL)
|
|
irq_base = -1;
|
|
#endif
|
|
}
|
|
|
|
chip->client = client;
|
|
|
|
chip->chip_type = id->driver_data & (PCA953X_TYPE | PCA957X_TYPE);
|
|
|
|
mutex_init(&chip->i2c_lock);
|
|
|
|
/* initialize cached registers from their original values.
|
|
* we can't share this chip with another i2c master.
|
|
*/
|
|
pca953x_setup_gpio(chip, id->driver_data & PCA_GPIO_MASK);
|
|
|
|
if (chip->chip_type == PCA953X_TYPE)
|
|
ret = device_pca953x_init(chip, invert);
|
|
else
|
|
ret = device_pca957x_init(chip, invert);
|
|
if (ret)
|
|
goto out_failed;
|
|
|
|
ret = pca953x_irq_setup(chip, id, irq_base);
|
|
if (ret)
|
|
goto out_failed;
|
|
|
|
ret = gpiochip_add(&chip->gpio_chip);
|
|
if (ret)
|
|
goto out_failed_irq;
|
|
|
|
if (pdata && pdata->setup) {
|
|
ret = pdata->setup(client, chip->gpio_chip.base,
|
|
chip->gpio_chip.ngpio, pdata->context);
|
|
if (ret < 0)
|
|
dev_warn(&client->dev, "setup failed, %d\n", ret);
|
|
}
|
|
|
|
i2c_set_clientdata(client, chip);
|
|
return 0;
|
|
|
|
out_failed_irq:
|
|
pca953x_irq_teardown(chip);
|
|
out_failed:
|
|
kfree(chip);
|
|
return ret;
|
|
}
|
|
|
|
static int pca953x_remove(struct i2c_client *client)
|
|
{
|
|
struct pca953x_platform_data *pdata = client->dev.platform_data;
|
|
struct pca953x_chip *chip = i2c_get_clientdata(client);
|
|
int ret = 0;
|
|
|
|
if (pdata && pdata->teardown) {
|
|
ret = pdata->teardown(client, chip->gpio_chip.base,
|
|
chip->gpio_chip.ngpio, pdata->context);
|
|
if (ret < 0) {
|
|
dev_err(&client->dev, "%s failed, %d\n",
|
|
"teardown", ret);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
ret = gpiochip_remove(&chip->gpio_chip);
|
|
if (ret) {
|
|
dev_err(&client->dev, "%s failed, %d\n",
|
|
"gpiochip_remove()", ret);
|
|
return ret;
|
|
}
|
|
|
|
pca953x_irq_teardown(chip);
|
|
kfree(chip);
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id pca953x_dt_ids[] = {
|
|
{ .compatible = "nxp,pca9534", },
|
|
{ .compatible = "nxp,pca9535", },
|
|
{ .compatible = "nxp,pca9536", },
|
|
{ .compatible = "nxp,pca9537", },
|
|
{ .compatible = "nxp,pca9538", },
|
|
{ .compatible = "nxp,pca9539", },
|
|
{ .compatible = "nxp,pca9554", },
|
|
{ .compatible = "nxp,pca9555", },
|
|
{ .compatible = "nxp,pca9556", },
|
|
{ .compatible = "nxp,pca9557", },
|
|
{ .compatible = "nxp,pca9574", },
|
|
{ .compatible = "nxp,pca9575", },
|
|
|
|
{ .compatible = "maxim,max7310", },
|
|
{ .compatible = "maxim,max7312", },
|
|
{ .compatible = "maxim,max7313", },
|
|
{ .compatible = "maxim,max7315", },
|
|
|
|
{ .compatible = "ti,pca6107", },
|
|
{ .compatible = "ti,tca6408", },
|
|
{ .compatible = "ti,tca6416", },
|
|
{ .compatible = "ti,tca6424", },
|
|
{ }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(of, pca953x_dt_ids);
|
|
|
|
static struct i2c_driver pca953x_driver = {
|
|
.driver = {
|
|
.name = "pca953x",
|
|
.of_match_table = pca953x_dt_ids,
|
|
},
|
|
.probe = pca953x_probe,
|
|
.remove = pca953x_remove,
|
|
.id_table = pca953x_id,
|
|
};
|
|
|
|
static int __init pca953x_init(void)
|
|
{
|
|
return i2c_add_driver(&pca953x_driver);
|
|
}
|
|
/* register after i2c postcore initcall and before
|
|
* subsys initcalls that may rely on these GPIOs
|
|
*/
|
|
subsys_initcall(pca953x_init);
|
|
|
|
static void __exit pca953x_exit(void)
|
|
{
|
|
i2c_del_driver(&pca953x_driver);
|
|
}
|
|
module_exit(pca953x_exit);
|
|
|
|
MODULE_AUTHOR("eric miao <eric.miao@marvell.com>");
|
|
MODULE_DESCRIPTION("GPIO expander driver for PCA953x");
|
|
MODULE_LICENSE("GPL");
|