From abdc08a3a263a20e49534a36291d657bf53dda5b Mon Sep 17 00:00:00 2001 From: Alexandre Courbot Date: Tue, 19 Aug 2014 10:06:09 -0700 Subject: gpio: change gpiochip_request_own_desc() prototype The current prototype of gpiochip_request_own_desc() requires to obtain a pointer to a descriptor. This is in contradiction to all other GPIO request schemes, and imposes an extra step of obtaining a descriptor to drivers. Most drivers actually cannot even perform that step since the function that does it (gpichip_get_desc()) is gpiolib-private. Change gpiochip_request_own_desc() to return a descriptor from a (chip, hwnum) tuple and update users of this function (currently gpiolib-acpi only). Signed-off-by: Alexandre Courbot Tested-by: Mika Westerberg Signed-off-by: Linus Walleij --- include/linux/gpio/driver.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'include') diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h index e78a2373e374..a2de58fffd19 100644 --- a/include/linux/gpio/driver.h +++ b/include/linux/gpio/driver.h @@ -166,7 +166,8 @@ int gpiochip_irqchip_add(struct gpio_chip *gpiochip, #endif /* CONFIG_GPIO_IRQCHIP */ -int gpiochip_request_own_desc(struct gpio_desc *desc, const char *label); +struct gpio_desc *gpiochip_request_own_desc(struct gpio_chip *chip, u16 hwnum, + const char *label); void gpiochip_free_own_desc(struct gpio_desc *desc); #else /* CONFIG_GPIOLIB */ -- cgit v1.2.3 From 3af0dbd592fe0a92002f16e341519ba03e92adf7 Mon Sep 17 00:00:00 2001 From: Sonic Zhang Date: Mon, 1 Sep 2014 11:19:52 +0800 Subject: gpio: mcp23s08 to support both device tree and platform data Device tree is not enabled in some architecture where gpio driver mcp23s08 is still required. v2-changes: - Parse device tree properties into platform data other than individual variables. v3-changes: - Use of_node in gpio_chip device structure, because the struct device * always has an of_node which is NULL when OF is not used. Signed-off-by: Sonic Zhang Reviewed-by: Alexandre Courbot Signed-off-by: Linus Walleij --- drivers/gpio/Kconfig | 1 - drivers/gpio/gpio-mcp23s08.c | 64 +++++++++++++++++++++++--------------------- include/linux/spi/mcp23s08.h | 18 +++++++++++++ 3 files changed, 52 insertions(+), 31 deletions(-) (limited to 'include') diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index ec27ec0be8c2..ec398bee7c60 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -806,7 +806,6 @@ config GPIO_MAX7301 config GPIO_MCP23S08 tristate "Microchip MCP23xxx I/O expander" - depends on OF_GPIO depends on (SPI_MASTER && !I2C) || I2C help SPI/I2C driver for Microchip MCP23S08/MCP23S17/MCP23008/MCP23017 diff --git a/drivers/gpio/gpio-mcp23s08.c b/drivers/gpio/gpio-mcp23s08.c index 6f183d9b487e..8488e2fd307c 100644 --- a/drivers/gpio/gpio-mcp23s08.c +++ b/drivers/gpio/gpio-mcp23s08.c @@ -479,7 +479,7 @@ static int mcp23s08_irq_setup(struct mcp23s08 *mcp) mutex_init(&mcp->irq_lock); - mcp->irq_domain = irq_domain_add_linear(chip->of_node, chip->ngpio, + mcp->irq_domain = irq_domain_add_linear(chip->dev->of_node, chip->ngpio, &irq_domain_simple_ops, mcp); if (!mcp->irq_domain) return -ENODEV; @@ -581,7 +581,7 @@ done: static int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev, void *data, unsigned addr, unsigned type, - unsigned base, unsigned pullups) + struct mcp23s08_platform_data *pdata, int cs) { int status; bool mirror = false; @@ -635,7 +635,7 @@ static int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev, return -EINVAL; } - mcp->chip.base = base; + mcp->chip.base = pdata->base; mcp->chip.can_sleep = true; mcp->chip.dev = dev; mcp->chip.owner = THIS_MODULE; @@ -648,11 +648,9 @@ static int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev, if (status < 0) goto fail; - mcp->irq_controller = of_property_read_bool(mcp->chip.of_node, - "interrupt-controller"); + mcp->irq_controller = pdata->irq_controller; if (mcp->irq && mcp->irq_controller && (type == MCP_TYPE_017)) - mirror = of_property_read_bool(mcp->chip.of_node, - "microchip,irq-mirror"); + mirror = pdata->mirror; if ((status & IOCON_SEQOP) || !(status & IOCON_HAEN) || mirror) { /* mcp23s17 has IOCON twice, make sure they are in sync */ @@ -668,7 +666,7 @@ static int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev, } /* configure ~100K pullups */ - status = mcp->ops->write(mcp, MCP_GPPU, pullups); + status = mcp->ops->write(mcp, MCP_GPPU, pdata->chip[cs].pullups); if (status < 0) goto fail; @@ -768,25 +766,29 @@ MODULE_DEVICE_TABLE(of, mcp23s08_i2c_of_match); static int mcp230xx_probe(struct i2c_client *client, const struct i2c_device_id *id) { - struct mcp23s08_platform_data *pdata; + struct mcp23s08_platform_data *pdata, local_pdata; struct mcp23s08 *mcp; - int status, base, pullups; + int status; const struct of_device_id *match; match = of_match_device(of_match_ptr(mcp23s08_i2c_of_match), &client->dev); - pdata = dev_get_platdata(&client->dev); - if (match || !pdata) { - base = -1; - pullups = 0; + if (match) { + pdata = &local_pdata; + pdata->base = -1; + pdata->chip[0].pullups = 0; + pdata->irq_controller = of_property_read_bool( + client->dev.of_node, + "interrupt-controller"); + pdata->mirror = of_property_read_bool(client->dev.of_node, + "microchip,irq-mirror"); client->irq = irq_of_parse_and_map(client->dev.of_node, 0); } else { - if (!gpio_is_valid(pdata->base)) { + pdata = dev_get_platdata(&client->dev); + if (!pdata || !gpio_is_valid(pdata->base)) { dev_dbg(&client->dev, "invalid platform data\n"); return -EINVAL; } - base = pdata->base; - pullups = pdata->chip[0].pullups; } mcp = kzalloc(sizeof(*mcp), GFP_KERNEL); @@ -795,7 +797,7 @@ static int mcp230xx_probe(struct i2c_client *client, mcp->irq = client->irq; status = mcp23s08_probe_one(mcp, &client->dev, client, client->addr, - id->driver_data, base, pullups); + id->driver_data, pdata, 0); if (status) goto fail; @@ -863,14 +865,12 @@ static void mcp23s08_i2c_exit(void) { } static int mcp23s08_probe(struct spi_device *spi) { - struct mcp23s08_platform_data *pdata; + struct mcp23s08_platform_data *pdata, local_pdata; unsigned addr; int chips = 0; struct mcp23s08_driver_data *data; int status, type; - unsigned base = -1, - ngpio = 0, - pullups[ARRAY_SIZE(pdata->chip)]; + unsigned ngpio = 0; const struct of_device_id *match; u32 spi_present_mask = 0; @@ -893,11 +893,18 @@ static int mcp23s08_probe(struct spi_device *spi) return -ENODEV; } + pdata = &local_pdata; + pdata->base = -1; for (addr = 0; addr < ARRAY_SIZE(pdata->chip); addr++) { - pullups[addr] = 0; + pdata->chip[addr].pullups = 0; if (spi_present_mask & (1 << addr)) chips++; } + pdata->irq_controller = of_property_read_bool( + spi->dev.of_node, + "interrupt-controller"); + pdata->mirror = of_property_read_bool(spi->dev.of_node, + "microchip,irq-mirror"); } else { type = spi_get_device_id(spi)->driver_data; pdata = dev_get_platdata(&spi->dev); @@ -917,10 +924,7 @@ static int mcp23s08_probe(struct spi_device *spi) return -EINVAL; } spi_present_mask |= 1 << addr; - pullups[addr] = pdata->chip[addr].pullups; } - - base = pdata->base; } if (!chips) @@ -938,13 +942,13 @@ static int mcp23s08_probe(struct spi_device *spi) chips--; data->mcp[addr] = &data->chip[chips]; status = mcp23s08_probe_one(data->mcp[addr], &spi->dev, spi, - 0x40 | (addr << 1), type, base, - pullups[addr]); + 0x40 | (addr << 1), type, pdata, + addr); if (status < 0) goto fail; - if (base != -1) - base += (type == MCP_TYPE_S17) ? 16 : 8; + if (pdata->base != -1) + pdata->base += (type == MCP_TYPE_S17) ? 16 : 8; ngpio += (type == MCP_TYPE_S17) ? 16 : 8; } data->ngpio = ngpio; diff --git a/include/linux/spi/mcp23s08.h b/include/linux/spi/mcp23s08.h index 2d676d5aaa89..aa07d7b32568 100644 --- a/include/linux/spi/mcp23s08.h +++ b/include/linux/spi/mcp23s08.h @@ -22,4 +22,22 @@ struct mcp23s08_platform_data { * base to base+15 (or base+31 for s17 variant). */ unsigned base; + /* Marks the device as a interrupt controller. + * NOTE: The interrupt functionality is only supported for i2c + * versions of the chips. The spi chips can also do the interrupts, + * but this is not supported by the linux driver yet. + */ + bool irq_controller; + + /* Sets the mirror flag in the IOCON register. Devices + * with two interrupt outputs (these are the devices ending with 17 and + * those that have 16 IOs) have two IO banks: IO 0-7 form bank 1 and + * IO 8-15 are bank 2. These chips have two different interrupt outputs: + * One for bank 1 and another for bank 2. If irq-mirror is set, both + * interrupts are generated regardless of the bank that an input change + * occurred on. If it is not set, the interrupt are only generated for + * the bank they belong to. + * On devices with only one interrupt output this property is useless. + */ + bool mirror; }; -- cgit v1.2.3 From e1db1706c86ee455f25eeaeadeda827e1e02310f Mon Sep 17 00:00:00 2001 From: abdoulaye berthe Date: Sat, 5 Jul 2014 18:28:50 +0200 Subject: gpio: gpiolib: set gpiochip_remove retval to void This avoids handling gpiochip remove error in device remove handler. Signed-off-by: Abdoulaye Berthe Signed-off-by: Linus Walleij --- drivers/gpio/gpiolib.c | 24 +++++++----------------- include/linux/gpio/driver.h | 2 +- 2 files changed, 8 insertions(+), 18 deletions(-) (limited to 'include') diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index a5831d6a9b91..bf1bb795f100 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -308,10 +308,9 @@ static void gpiochip_irqchip_remove(struct gpio_chip *gpiochip); * * A gpio_chip with any GPIOs still requested may not be removed. */ -int gpiochip_remove(struct gpio_chip *chip) +void gpiochip_remove(struct gpio_chip *chip) { unsigned long flags; - int status = 0; unsigned id; acpi_gpiochip_remove(chip); @@ -323,24 +322,15 @@ int gpiochip_remove(struct gpio_chip *chip) of_gpiochip_remove(chip); for (id = 0; id < chip->ngpio; id++) { - if (test_bit(FLAG_REQUESTED, &chip->desc[id].flags)) { - status = -EBUSY; - break; - } - } - if (status == 0) { - for (id = 0; id < chip->ngpio; id++) - chip->desc[id].chip = NULL; - - list_del(&chip->list); + if (test_bit(FLAG_REQUESTED, &chip->desc[id].flags)) + dev_crit(chip->dev, "REMOVING GPIOCHIP WITH GPIOS STILL REQUESTED\n"); } + for (id = 0; id < chip->ngpio; id++) + chip->desc[id].chip = NULL; + list_del(&chip->list); spin_unlock_irqrestore(&gpio_lock, flags); - - if (status == 0) - gpiochip_unexport(chip); - - return status; + gpiochip_unexport(chip); } EXPORT_SYMBOL_GPL(gpiochip_remove); diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h index a2de58fffd19..560bf7fa614f 100644 --- a/include/linux/gpio/driver.h +++ b/include/linux/gpio/driver.h @@ -141,7 +141,7 @@ extern const char *gpiochip_is_requested(struct gpio_chip *chip, /* add/remove chips */ extern int gpiochip_add(struct gpio_chip *chip); -extern int gpiochip_remove(struct gpio_chip *chip); +extern void gpiochip_remove(struct gpio_chip *chip); extern struct gpio_chip *gpiochip_find(void *data, int (*match)(struct gpio_chip *chip, void *data)); -- cgit v1.2.3 From 3d2613c4289ff22de3aa24d2d0a29e33937f023a Mon Sep 17 00:00:00 2001 From: Weike Chen Date: Wed, 17 Sep 2014 09:18:39 -0700 Subject: GPIO: gpio-dwapb: Enable platform driver binding to MFD driver The Synopsys DesignWare APB GPIO driver only supports open firmware devices. But, like Intel Quark X1000 SOC, which has a single PCI function exporting a GPIO and an I2C controller, it is a Multifunction device. This patch is to enable the current Synopsys DesignWare APB GPIO driver to support the Multifunction device which exports the designware GPIO controller. Reviewed-by: Hock Leong Kweh Signed-off-by: Weike Chen Signed-off-by: Linus Walleij --- drivers/gpio/Kconfig | 1 - drivers/gpio/gpio-dwapb.c | 224 +++++++++++++++++++++++-------- include/linux/platform_data/gpio-dwapb.h | 32 +++++ 3 files changed, 199 insertions(+), 58 deletions(-) create mode 100644 include/linux/platform_data/gpio-dwapb.h (limited to 'include') diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index ec398bee7c60..d9ffb6dfa54b 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -136,7 +136,6 @@ config GPIO_DWAPB tristate "Synopsys DesignWare APB GPIO driver" select GPIO_GENERIC select GENERIC_IRQ_CHIP - depends on OF_GPIO help Say Y or M here to build support for the Synopsys DesignWare APB GPIO block. diff --git a/drivers/gpio/gpio-dwapb.c b/drivers/gpio/gpio-dwapb.c index d6618a6e2399..27466b5af5e8 100644 --- a/drivers/gpio/gpio-dwapb.c +++ b/drivers/gpio/gpio-dwapb.c @@ -21,6 +21,8 @@ #include #include #include +#include +#include #define GPIO_SWPORTA_DR 0x00 #define GPIO_SWPORTA_DDR 0x04 @@ -84,11 +86,10 @@ static void dwapb_toggle_trigger(struct dwapb_gpio *gpio, unsigned int offs) writel(v, gpio->regs + GPIO_INT_POLARITY); } -static void dwapb_irq_handler(u32 irq, struct irq_desc *desc) +static u32 dwapb_do_irq(struct dwapb_gpio *gpio) { - struct dwapb_gpio *gpio = irq_get_handler_data(irq); - struct irq_chip *chip = irq_desc_get_chip(desc); u32 irq_status = readl_relaxed(gpio->regs + GPIO_INTSTATUS); + u32 ret = irq_status; while (irq_status) { int hwirq = fls(irq_status) - 1; @@ -102,6 +103,16 @@ static void dwapb_irq_handler(u32 irq, struct irq_desc *desc) dwapb_toggle_trigger(gpio, hwirq); } + return ret; +} + +static void dwapb_irq_handler(u32 irq, struct irq_desc *desc) +{ + struct dwapb_gpio *gpio = irq_get_handler_data(irq); + struct irq_chip *chip = irq_desc_get_chip(desc); + + dwapb_do_irq(gpio); + if (chip->irq_eoi) chip->irq_eoi(irq_desc_get_irq_data(desc)); } @@ -207,22 +218,26 @@ static int dwapb_irq_set_type(struct irq_data *d, u32 type) return 0; } +static irqreturn_t dwapb_irq_handler_mfd(int irq, void *dev_id) +{ + u32 worked; + struct dwapb_gpio *gpio = dev_id; + + worked = dwapb_do_irq(gpio); + + return worked ? IRQ_HANDLED : IRQ_NONE; +} + static void dwapb_configure_irqs(struct dwapb_gpio *gpio, - struct dwapb_gpio_port *port) + struct dwapb_gpio_port *port, + struct dwapb_port_property *pp) { struct gpio_chip *gc = &port->bgc.gc; - struct device_node *node = gc->of_node; - struct irq_chip_generic *irq_gc; + struct device_node *node = pp->node; + struct irq_chip_generic *irq_gc = NULL; unsigned int hwirq, ngpio = gc->ngpio; struct irq_chip_type *ct; - int err, irq, i; - - irq = irq_of_parse_and_map(node, 0); - if (!irq) { - dev_warn(gpio->dev, "no irq for bank %s\n", - port->bgc.gc.of_node->full_name); - return; - } + int err, i; gpio->domain = irq_domain_add_linear(node, ngpio, &irq_generic_chip_ops, gpio); @@ -269,8 +284,24 @@ static void dwapb_configure_irqs(struct dwapb_gpio *gpio, irq_gc->chip_types[1].type = IRQ_TYPE_EDGE_BOTH; irq_gc->chip_types[1].handler = handle_edge_irq; - irq_set_chained_handler(irq, dwapb_irq_handler); - irq_set_handler_data(irq, gpio); + if (!pp->irq_shared) { + irq_set_chained_handler(pp->irq, dwapb_irq_handler); + irq_set_handler_data(pp->irq, gpio); + } else { + /* + * Request a shared IRQ since where MFD would have devices + * using the same irq pin + */ + err = devm_request_irq(gpio->dev, pp->irq, + dwapb_irq_handler_mfd, + IRQF_SHARED, "gpio-dwapb-mfd", gpio); + if (err) { + dev_err(gpio->dev, "error requesting IRQ\n"); + irq_domain_remove(gpio->domain); + gpio->domain = NULL; + return; + } + } for (hwirq = 0 ; hwirq < ngpio ; hwirq++) irq_create_mapping(gpio->domain, hwirq); @@ -296,57 +327,42 @@ static void dwapb_irq_teardown(struct dwapb_gpio *gpio) } static int dwapb_gpio_add_port(struct dwapb_gpio *gpio, - struct device_node *port_np, + struct dwapb_port_property *pp, unsigned int offs) { struct dwapb_gpio_port *port; - u32 port_idx, ngpio; void __iomem *dat, *set, *dirout; int err; - if (of_property_read_u32(port_np, "reg", &port_idx) || - port_idx >= DWAPB_MAX_PORTS) { - dev_err(gpio->dev, "missing/invalid port index for %s\n", - port_np->full_name); - return -EINVAL; - } - port = &gpio->ports[offs]; port->gpio = gpio; - if (of_property_read_u32(port_np, "snps,nr-gpios", &ngpio)) { - dev_info(gpio->dev, "failed to get number of gpios for %s\n", - port_np->full_name); - ngpio = 32; - } - - dat = gpio->regs + GPIO_EXT_PORTA + (port_idx * GPIO_EXT_PORT_SIZE); - set = gpio->regs + GPIO_SWPORTA_DR + (port_idx * GPIO_SWPORT_DR_SIZE); + dat = gpio->regs + GPIO_EXT_PORTA + (pp->idx * GPIO_EXT_PORT_SIZE); + set = gpio->regs + GPIO_SWPORTA_DR + (pp->idx * GPIO_SWPORT_DR_SIZE); dirout = gpio->regs + GPIO_SWPORTA_DDR + - (port_idx * GPIO_SWPORT_DDR_SIZE); + (pp->idx * GPIO_SWPORT_DDR_SIZE); err = bgpio_init(&port->bgc, gpio->dev, 4, dat, set, NULL, dirout, NULL, false); if (err) { dev_err(gpio->dev, "failed to init gpio chip for %s\n", - port_np->full_name); + pp->name); return err; } - port->bgc.gc.ngpio = ngpio; - port->bgc.gc.of_node = port_np; +#ifdef CONFIG_OF_GPIO + port->bgc.gc.of_node = pp->node; +#endif + port->bgc.gc.ngpio = pp->ngpio; + port->bgc.gc.base = pp->gpio_base; - /* - * Only port A can provide interrupts in all configurations of the IP. - */ - if (port_idx == 0 && - of_property_read_bool(port_np, "interrupt-controller")) - dwapb_configure_irqs(gpio, port); + if (pp->irq) + dwapb_configure_irqs(gpio, port, pp); err = gpiochip_add(&port->bgc.gc); if (err) dev_err(gpio->dev, "failed to register gpiochip for %s\n", - port_np->full_name); + pp->name); else port->is_registered = true; @@ -362,25 +378,116 @@ static void dwapb_gpio_unregister(struct dwapb_gpio *gpio) gpiochip_remove(&gpio->ports[m].bgc.gc); } +static struct dwapb_platform_data * +dwapb_gpio_get_pdata_of(struct device *dev) +{ + struct device_node *node, *port_np; + struct dwapb_platform_data *pdata; + struct dwapb_port_property *pp; + int nports; + int i; + + node = dev->of_node; + if (!IS_ENABLED(CONFIG_OF_GPIO) || !node) + return ERR_PTR(-ENODEV); + + nports = of_get_child_count(node); + if (nports == 0) + return ERR_PTR(-ENODEV); + + pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return ERR_PTR(-ENOMEM); + + pdata->properties = kcalloc(nports, sizeof(*pp), GFP_KERNEL); + if (!pdata->properties) { + kfree(pdata); + return ERR_PTR(-ENOMEM); + } + + pdata->nports = nports; + + i = 0; + for_each_child_of_node(node, port_np) { + pp = &pdata->properties[i++]; + pp->node = port_np; + + if (of_property_read_u32(port_np, "reg", &pp->idx) || + pp->idx >= DWAPB_MAX_PORTS) { + dev_err(dev, "missing/invalid port index for %s\n", + port_np->full_name); + kfree(pdata->properties); + kfree(pdata); + return ERR_PTR(-EINVAL); + } + + if (of_property_read_u32(port_np, "snps,nr-gpios", + &pp->ngpio)) { + dev_info(dev, "failed to get number of gpios for %s\n", + port_np->full_name); + pp->ngpio = 32; + } + + /* + * Only port A can provide interrupts in all configurations of + * the IP. + */ + if (pp->idx == 0 && + of_property_read_bool(port_np, "interrupt-controller")) { + pp->irq = irq_of_parse_and_map(port_np, 0); + if (!pp->irq) { + dev_warn(dev, "no irq for bank %s\n", + port_np->full_name); + } + } + + pp->irq_shared = false; + pp->gpio_base = -1; + pp->name = port_np->full_name; + } + + return pdata; +} + +static inline void dwapb_free_pdata_of(struct dwapb_platform_data *pdata) +{ + if (!IS_ENABLED(CONFIG_OF_GPIO) || !pdata) + return; + + kfree(pdata->properties); + kfree(pdata); +} + static int dwapb_gpio_probe(struct platform_device *pdev) { + unsigned int i; struct resource *res; struct dwapb_gpio *gpio; - struct device_node *np; int err; - unsigned int offs = 0; + struct device *dev = &pdev->dev; + struct dwapb_platform_data *pdata = dev_get_platdata(dev); + bool is_pdata_alloc = !pdata; + + if (is_pdata_alloc) { + pdata = dwapb_gpio_get_pdata_of(dev); + if (IS_ERR(pdata)) + return PTR_ERR(pdata); + } - gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL); - if (!gpio) - return -ENOMEM; - gpio->dev = &pdev->dev; + if (!pdata->nports) { + err = -ENODEV; + goto out_err; + } - gpio->nr_ports = of_get_child_count(pdev->dev.of_node); - if (!gpio->nr_ports) { - err = -EINVAL; + gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL); + if (!gpio) { + err = -ENOMEM; goto out_err; } - gpio->ports = devm_kzalloc(&pdev->dev, gpio->nr_ports * + gpio->dev = &pdev->dev; + gpio->nr_ports = pdata->nports; + + gpio->ports = devm_kcalloc(&pdev->dev, gpio->nr_ports, sizeof(*gpio->ports), GFP_KERNEL); if (!gpio->ports) { err = -ENOMEM; @@ -394,20 +501,23 @@ static int dwapb_gpio_probe(struct platform_device *pdev) goto out_err; } - for_each_child_of_node(pdev->dev.of_node, np) { - err = dwapb_gpio_add_port(gpio, np, offs++); + for (i = 0; i < gpio->nr_ports; i++) { + err = dwapb_gpio_add_port(gpio, &pdata->properties[i], i); if (err) goto out_unregister; } platform_set_drvdata(pdev, gpio); - return 0; + goto out_err; out_unregister: dwapb_gpio_unregister(gpio); dwapb_irq_teardown(gpio); out_err: + if (is_pdata_alloc) + dwapb_free_pdata_of(pdata); + return err; } diff --git a/include/linux/platform_data/gpio-dwapb.h b/include/linux/platform_data/gpio-dwapb.h new file mode 100644 index 000000000000..28702c849af1 --- /dev/null +++ b/include/linux/platform_data/gpio-dwapb.h @@ -0,0 +1,32 @@ +/* + * Copyright(c) 2014 Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + */ + +#ifndef GPIO_DW_APB_H +#define GPIO_DW_APB_H + +struct dwapb_port_property { + struct device_node *node; + const char *name; + unsigned int idx; + unsigned int ngpio; + unsigned int gpio_base; + unsigned int irq; + bool irq_shared; +}; + +struct dwapb_platform_data { + struct dwapb_port_property *properties; + unsigned int nports; +}; + +#endif -- cgit v1.2.3 From 7ca267faba8ad097f57cb71c32ae1865de83241a Mon Sep 17 00:00:00 2001 From: Mika Westerberg Date: Mon, 15 Sep 2014 17:09:44 +0300 Subject: gpio: Increase ARCH_NR_GPIOs to 512 Some newer Intel SoCs, like Braswell already have more than 256 GPIOs available so the default limit is exceeded. Instead of adding more architecture specific gpio.h files with custom ARCH_NR_GPIOs we increase the gpiolib default limit to be twice the current. Current generic ARCH_NR_GPIOS limit is 256 which starts to be too small for newer Intel SoCs like Braswell. In order to support GPIO controllers on these SoCs we increase ARCH_NR_GPIOS to be 512 which should be sufficient for now. The kernel size increases a bit with this change. Below is an example of x86_64 kernel image. ARCH_NR_GPIOS=256 text data bss dec hex filename 11476173 1971328 1265664 14713165 e0814d vmlinux ARCH_NR_GPIOS=512 text data bss dec hex filename 11476173 1971328 1269760 14717261 e0914d vmlinux So the BSS size and this the kernel image size increases by 4k. Signed-off-by: Mika Westerberg Signed-off-by: Linus Walleij --- include/asm-generic/gpio.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include') diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h index c1d4105e1c1d..383ade1a211b 100644 --- a/include/asm-generic/gpio.h +++ b/include/asm-generic/gpio.h @@ -27,7 +27,7 @@ */ #ifndef ARCH_NR_GPIOS -#define ARCH_NR_GPIOS 256 +#define ARCH_NR_GPIOS 512 #endif /* -- cgit v1.2.3 From 295494af0695bc190e6b939df1036af898c2856f Mon Sep 17 00:00:00 2001 From: Octavian Purdila Date: Fri, 19 Sep 2014 23:22:44 +0300 Subject: gpiolib: add irq_not_threaded flag to gpio_chip Some GPIO chips (e.g. the DLN2 USB adapter) have blocking get/set operation but do not need a threaded irq handler. Signed-off-by: Octavian Purdila Signed-off-by: Linus Walleij --- drivers/gpio/gpiolib.c | 2 +- include/linux/gpio/driver.h | 3 +++ 2 files changed, 4 insertions(+), 1 deletion(-) (limited to 'include') diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 4acf8b2e9226..6fdae789ccc9 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -437,7 +437,7 @@ static int gpiochip_irq_map(struct irq_domain *d, unsigned int irq, irq_set_lockdep_class(irq, &gpiochip_irq_lock_class); irq_set_chip_and_handler(irq, chip->irqchip, chip->irq_handler); /* Chips that can sleep need nested thread handlers */ - if (chip->can_sleep) + if (chip->can_sleep && !chip->irq_not_threaded) irq_set_nested_thread(irq, 1); #ifdef CONFIG_ARM set_irq_flags(irq, IRQF_VALID); diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h index 560bf7fa614f..719fab209158 100644 --- a/include/linux/gpio/driver.h +++ b/include/linux/gpio/driver.h @@ -56,6 +56,8 @@ struct seq_file; * as the chip access may sleep when e.g. reading out the IRQ status * registers. * @exported: flags if the gpiochip is exported for use from sysfs. Private. + * @irq_not_threaded: flag must be set if @can_sleep is set but the + * IRQs don't need to be threaded * * A gpio_chip can help platforms abstract various sources of GPIOs so * they can all be accessed through a common programing interface. @@ -101,6 +103,7 @@ struct gpio_chip { struct gpio_desc *desc; const char *const *names; bool can_sleep; + bool irq_not_threaded; bool exported; #ifdef CONFIG_GPIOLIB_IRQCHIP -- cgit v1.2.3