diff options
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/gpio/gpio-langwell.c | 27 | ||||
| -rw-r--r-- | drivers/gpio/gpio-ml-ioh.c | 254 | ||||
| -rw-r--r-- | drivers/gpio/gpio-mxc.c | 6 | ||||
| -rw-r--r-- | drivers/gpio/gpio-nomadik.c | 127 | ||||
| -rw-r--r-- | drivers/gpio/gpio-pca953x.c | 11 | ||||
| -rw-r--r-- | drivers/gpio/gpio-pch.c | 250 | ||||
| -rw-r--r-- | drivers/gpio/gpio-pl061.c | 31 |
8 files changed, 662 insertions, 46 deletions
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index d539efd96d4b..de5fea60b385 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -388,6 +388,7 @@ config GPIO_LANGWELL config GPIO_PCH tristate "Intel EG20T PCH / OKI SEMICONDUCTOR ML7223 IOH GPIO" depends on PCI && X86 + select GENERIC_IRQ_CHIP help This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff which is an IOH(Input/Output Hub) for x86 embedded processor. @@ -402,6 +403,7 @@ config GPIO_PCH config GPIO_ML_IOH tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support" depends on PCI + select GENERIC_IRQ_CHIP help ML7213 is companion chip for Intel Atom E6xx series. This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output diff --git a/drivers/gpio/gpio-langwell.c b/drivers/gpio/gpio-langwell.c index d2eb57c60e0e..00692e89ef87 100644 --- a/drivers/gpio/gpio-langwell.c +++ b/drivers/gpio/gpio-langwell.c @@ -59,6 +59,7 @@ enum GPIO_REG { GRER, /* rising edge detect */ GFER, /* falling edge detect */ GEDR, /* edge detect result */ + GAFR, /* alt function */ }; struct lnw_gpio { @@ -81,6 +82,31 @@ static void __iomem *gpio_reg(struct gpio_chip *chip, unsigned offset, return ptr; } +static void __iomem *gpio_reg_2bit(struct gpio_chip *chip, unsigned offset, + enum GPIO_REG reg_type) +{ + struct lnw_gpio *lnw = container_of(chip, struct lnw_gpio, chip); + unsigned nreg = chip->ngpio / 32; + u8 reg = offset / 16; + void __iomem *ptr; + + ptr = (void __iomem *)(lnw->reg_base + reg_type * nreg * 4 + reg * 4); + return ptr; +} + +static int lnw_gpio_request(struct gpio_chip *chip, unsigned offset) +{ + void __iomem *gafr = gpio_reg_2bit(chip, offset, GAFR); + u32 value = readl(gafr); + int shift = (offset % 16) << 1, af = (value >> shift) & 3; + + if (af) { + value &= ~(3 << shift); + writel(value, gafr); + } + return 0; +} + static int lnw_gpio_get(struct gpio_chip *chip, unsigned offset) { void __iomem *gplr = gpio_reg(chip, offset, GPLR); @@ -321,6 +347,7 @@ static int __devinit lnw_gpio_probe(struct pci_dev *pdev, lnw->reg_base = base; lnw->irq_base = irq_base; lnw->chip.label = dev_name(&pdev->dev); + lnw->chip.request = lnw_gpio_request; lnw->chip.direction_input = lnw_gpio_direction_input; lnw->chip.direction_output = lnw_gpio_direction_output; lnw->chip.get = lnw_gpio_get; diff --git a/drivers/gpio/gpio-ml-ioh.c b/drivers/gpio/gpio-ml-ioh.c index a9016f56ed7e..3aa6beec8c1e 100644 --- a/drivers/gpio/gpio-ml-ioh.c +++ b/drivers/gpio/gpio-ml-ioh.c @@ -18,6 +18,17 @@ #include <linux/slab.h> #include <linux/pci.h> #include <linux/gpio.h> +#include <linux/interrupt.h> +#include <linux/irq.h> + +#define IOH_EDGE_FALLING 0 +#define IOH_EDGE_RISING BIT(0) +#define IOH_LEVEL_L BIT(1) +#define IOH_LEVEL_H (BIT(0) | BIT(1)) +#define IOH_EDGE_BOTH BIT(2) +#define IOH_IM_MASK (BIT(0) | BIT(1) | BIT(2)) + +#define IOH_IRQ_BASE 0 #define PCI_VENDOR_ID_ROHM 0x10DB @@ -46,12 +57,22 @@ struct ioh_regs { /** * struct ioh_gpio_reg_data - The register store data. + * @ien_reg To store contents of interrupt enable register. + * @imask_reg: To store contents of interrupt mask regist * @po_reg: To store contents of PO register. * @pm_reg: To store contents of PM register. + * @im0_reg: To store contents of interrupt mode regist0 + * @im1_reg: To store contents of interrupt mode regist1 + * @use_sel_reg: To store contents of GPIO_USE_SEL0~3 */ struct ioh_gpio_reg_data { + u32 ien_reg; + u32 imask_reg; u32 po_reg; u32 pm_reg; + u32 im0_reg; + u32 im1_reg; + u32 use_sel_reg; }; /** @@ -62,7 +83,11 @@ struct ioh_gpio_reg_data { * @gpio: Data for GPIO infrastructure. * @ioh_gpio_reg: Memory mapped Register data is saved here * when suspend. + * @gpio_use_sel: Save GPIO_USE_SEL1~4 register for PM * @ch: Indicate GPIO channel + * @irq_base: Save base of IRQ number for interrupt + * @spinlock: Used for register access protection in + * interrupt context ioh_irq_type and PM; */ struct ioh_gpio { void __iomem *base; @@ -70,8 +95,11 @@ struct ioh_gpio { struct device *dev; struct gpio_chip gpio; struct ioh_gpio_reg_data ioh_gpio_reg; + u32 gpio_use_sel; struct mutex lock; int ch; + int irq_base; + spinlock_t spinlock; }; static const int num_ports[] = {6, 12, 16, 16, 15, 16, 16, 12}; @@ -145,8 +173,25 @@ static int ioh_gpio_direction_input(struct gpio_chip *gpio, unsigned nr) */ static void ioh_gpio_save_reg_conf(struct ioh_gpio *chip) { - chip->ioh_gpio_reg.po_reg = ioread32(&chip->reg->regs[chip->ch].po); - chip->ioh_gpio_reg.pm_reg = ioread32(&chip->reg->regs[chip->ch].pm); + int i; + + for (i = 0; i < 8; i ++, chip++) { + chip->ioh_gpio_reg.po_reg = + ioread32(&chip->reg->regs[chip->ch].po); + chip->ioh_gpio_reg.pm_reg = + ioread32(&chip->reg->regs[chip->ch].pm); + chip->ioh_gpio_reg.ien_reg = + ioread32(&chip->reg->regs[chip->ch].ien); + chip->ioh_gpio_reg.imask_reg = + ioread32(&chip->reg->regs[chip->ch].imask); + chip->ioh_gpio_reg.im0_reg = + ioread32(&chip->reg->regs[chip->ch].im_0); + chip->ioh_gpio_reg.im1_reg = + ioread32(&chip->reg->regs[chip->ch].im_1); + if (i < 4) + chip->ioh_gpio_reg.use_sel_reg = + ioread32(&chip->reg->ioh_sel_reg[i]); + } } /* @@ -154,13 +199,34 @@ static void ioh_gpio_save_reg_conf(struct ioh_gpio *chip) */ static void ioh_gpio_restore_reg_conf(struct ioh_gpio *chip) { - /* to store contents of PO register */ - iowrite32(chip->ioh_gpio_reg.po_reg, &chip->reg->regs[chip->ch].po); - /* to store contents of PM register */ - iowrite32(chip->ioh_gpio_reg.pm_reg, &chip->reg->regs[chip->ch].pm); + int i; + + for (i = 0; i < 8; i ++, chip++) { + iowrite32(chip->ioh_gpio_reg.po_reg, + &chip->reg->regs[chip->ch].po); + iowrite32(chip->ioh_gpio_reg.pm_reg, + &chip->reg->regs[chip->ch].pm); + iowrite32(chip->ioh_gpio_reg.ien_reg, + &chip->reg->regs[chip->ch].ien); + iowrite32(chip->ioh_gpio_reg.imask_reg, + &chip->reg->regs[chip->ch].imask); + iowrite32(chip->ioh_gpio_reg.im0_reg, + &chip->reg->regs[chip->ch].im_0); + iowrite32(chip->ioh_gpio_reg.im1_reg, + &chip->reg->regs[chip->ch].im_1); + if (i < 4) + iowrite32(chip->ioh_gpio_reg.use_sel_reg, + &chip->reg->ioh_sel_reg[i]); + } } #endif +static int ioh_gpio_to_irq(struct gpio_chip *gpio, unsigned offset) +{ + struct ioh_gpio *chip = container_of(gpio, struct ioh_gpio, gpio); + return chip->irq_base + offset; +} + static void ioh_gpio_setup(struct ioh_gpio *chip, int num_port) { struct gpio_chip *gpio = &chip->gpio; @@ -175,16 +241,148 @@ static void ioh_gpio_setup(struct ioh_gpio *chip, int num_port) gpio->base = -1; gpio->ngpio = num_port; gpio->can_sleep = 0; + gpio->to_irq = ioh_gpio_to_irq; +} + +static int ioh_irq_type(struct irq_data *d, unsigned int type) +{ + u32 im; + u32 *im_reg; + u32 ien; + u32 im_pos; + int ch; + unsigned long flags; + u32 val; + int irq = d->irq; + struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); + struct ioh_gpio *chip = gc->private; + + ch = irq - chip->irq_base; + if (irq <= chip->irq_base + 7) { + im_reg = &chip->reg->regs[chip->ch].im_0; + im_pos = ch; + } else { + im_reg = &chip->reg->regs[chip->ch].im_1; + im_pos = ch - 8; + } + dev_dbg(chip->dev, "%s:irq=%d type=%d ch=%d pos=%d type=%d\n", + __func__, irq, type, ch, im_pos, type); + + spin_lock_irqsave(&chip->spinlock, flags); + + switch (type) { + case IRQ_TYPE_EDGE_RISING: + val = IOH_EDGE_RISING; + break; + case IRQ_TYPE_EDGE_FALLING: + val = IOH_EDGE_FALLING; + break; + case IRQ_TYPE_EDGE_BOTH: + val = IOH_EDGE_BOTH; + break; + case IRQ_TYPE_LEVEL_HIGH: + val = IOH_LEVEL_H; + break; + case IRQ_TYPE_LEVEL_LOW: + val = IOH_LEVEL_L; + break; + case IRQ_TYPE_PROBE: + goto end; + default: + dev_warn(chip->dev, "%s: unknown type(%dd)", + __func__, type); + goto end; + } + + /* Set interrupt mode */ + im = ioread32(im_reg) & ~(IOH_IM_MASK << (im_pos * 4)); + iowrite32(im | (val << (im_pos * 4)), im_reg); + + /* iclr */ + iowrite32(BIT(ch), &chip->reg->regs[chip->ch].iclr); + + /* IMASKCLR */ + iowrite32(BIT(ch), &chip->reg->regs[chip->ch].imaskclr); + + /* Enable interrupt */ + ien = ioread32(&chip->reg->regs[chip->ch].ien); + iowrite32(ien | BIT(ch), &chip->reg->regs[chip->ch].ien); +end: + spin_unlock_irqrestore(&chip->spinlock, flags); + + return 0; +} + +static void ioh_irq_unmask(struct irq_data *d) +{ + struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); + struct ioh_gpio *chip = gc->private; + + iowrite32(1 << (d->irq - chip->irq_base), + &chip->reg->regs[chip->ch].imaskclr); +} + +static void ioh_irq_mask(struct irq_data *d) +{ + struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); + struct ioh_gpio *chip = gc->private; + + iowrite32(1 << (d->irq - chip->irq_base), + &chip->reg->regs[chip->ch].imask); +} + +static irqreturn_t ioh_gpio_handler(int irq, void *dev_id) +{ + struct ioh_gpio *chip = dev_id; + u32 reg_val; + int i, j; + int ret = IRQ_NONE; + + for (i = 0; i < 8; i++) { + reg_val = ioread32(&chip->reg->regs[i].istatus); + for (j = 0; j < num_ports[i]; j++) { + if (reg_val & BIT(j)) { + dev_dbg(chip->dev, + "%s:[%d]:irq=%d status=0x%x\n", + __func__, j, irq, reg_val); + iowrite32(BIT(j), + &chip->reg->regs[chip->ch].iclr); + generic_handle_irq(chip->irq_base + j); + ret = IRQ_HANDLED; + } + } + } + return ret; +} + +static __devinit void ioh_gpio_alloc_generic_chip(struct ioh_gpio *chip, + unsigned int irq_start, unsigned int num) +{ + struct irq_chip_generic *gc; + struct irq_chip_type *ct; + + gc = irq_alloc_generic_chip("ioh_gpio", 1, irq_start, chip->base, + handle_simple_irq); + gc->private = chip; + ct = gc->chip_types; + + ct->chip.irq_mask = ioh_irq_mask; + ct->chip.irq_unmask = ioh_irq_unmask; + ct->chip.irq_set_type = ioh_irq_type; + + irq_setup_generic_chip(gc, IRQ_MSK(num), IRQ_GC_INIT_MASK_CACHE, + IRQ_NOREQUEST | IRQ_NOPROBE, 0); } static int __devinit ioh_gpio_probe(struct pci_dev *pdev, const struct pci_device_id *id) { int ret; - int i; + int i, j; struct ioh_gpio *chip; void __iomem *base; void __iomem *chip_save; + int irq_base; ret = pci_enable_device(pdev); if (ret) { @@ -228,10 +426,41 @@ static int __devinit ioh_gpio_probe(struct pci_dev *pdev, } chip = chip_save; + for (j = 0; j < 8; j++, chip++) { + irq_base = irq_alloc_descs(-1, IOH_IRQ_BASE, num_ports[j], + NUMA_NO_NODE); + if (irq_base < 0) { + dev_warn(&pdev->dev, + "ml_ioh_gpio: Failed to get IRQ base num\n"); + chip->irq_base = -1; + goto err_irq_alloc_descs; + } + chip->irq_base = irq_base; + ioh_gpio_alloc_generic_chip(chip, irq_base, num_ports[j]); + } + + chip = chip_save; + ret = request_irq(pdev->irq, ioh_gpio_handler, + IRQF_SHARED, KBUILD_MODNAME, chip); + if (ret != 0) { + dev_err(&pdev->dev, + "%s request_irq failed\n", __func__); + goto err_request_irq; + } + pci_set_drvdata(pdev, chip); return 0; +err_request_irq: + chip = chip_save; +err_irq_alloc_descs: + while (--j >= 0) { + chip--; + irq_free_descs(chip->irq_base, num_ports[j]); + } + + chip = chip_save; err_gpiochip_add: while (--i >= 0) { chip--; @@ -264,7 +493,11 @@ static void __devexit ioh_gpio_remove(struct pci_dev *pdev) void __iomem *chip_save; chip_save = chip; + + free_irq(pdev->irq, chip); + for (i = 0; i < 8; i++, chip++) { + irq_free_descs(chip->irq_base, num_ports[i]); err = gpiochip_remove(&chip->gpio); if (err) dev_err(&pdev->dev, "Failed gpiochip_remove\n"); @@ -282,9 +515,11 @@ static int ioh_gpio_suspend(struct pci_dev *pdev, pm_message_t state) { s32 ret; struct ioh_gpio *chip = pci_get_drvdata(pdev); + unsigned long flags; + spin_lock_irqsave(&chip->spinlock, flags); ioh_gpio_save_reg_conf(chip); - ioh_gpio_restore_reg_conf(chip); + spin_unlock_irqrestore(&chip->spinlock, flags); ret = pci_save_state(pdev); if (ret) { @@ -304,6 +539,7 @@ static int ioh_gpio_resume(struct pci_dev *pdev) { s32 ret; struct ioh_gpio *chip = pci_get_drvdata(pdev); + unsigned long flags; ret = pci_enable_wake(pdev, PCI_D0, 0); @@ -315,9 +551,11 @@ static int ioh_gpio_resume(struct pci_dev *pdev) } pci_restore_state(pdev); + spin_lock_irqsave(&chip->spinlock, flags); iowrite32(0x01, &chip->reg->srst); iowrite32(0x00, &chip->reg->srst); ioh_gpio_restore_reg_conf(chip); + spin_unlock_irqrestore(&chip->spinlock, flags); return 0; } diff --git a/drivers/gpio/gpio-mxc.c b/drivers/gpio/gpio-mxc.c index 4340acae3bd3..82f7b65baf72 100644 --- a/drivers/gpio/gpio-mxc.c +++ b/drivers/gpio/gpio-mxc.c @@ -30,6 +30,7 @@ #include <linux/of.h> #include <linux/of_device.h> #include <asm-generic/bug.h> +#include <asm/mach/irq.h> enum mxc_gpio_hwtype { IMX1_GPIO, /* runs on i.mx1 */ @@ -232,10 +233,15 @@ static void mx3_gpio_irq_handler(u32 irq, struct irq_desc *desc) { u32 irq_stat; struct mxc_gpio_port *port = irq_get_handler_data(irq); + struct irq_chip *chip = irq_get_chip(irq); + + chained_irq_enter(chip, desc); irq_stat = readl(port->base + GPIO_ISR) & readl(port->base + GPIO_IMR); mxc_gpio_irq_handler(port, irq_stat); + + chained_irq_exit(chip, desc); } /* MX2 has one interrupt *for all* gpio ports */ diff --git a/drivers/gpio/gpio-nomadik.c b/drivers/gpio/gpio-nomadik.c index 2c212c732d76..0b7ec1258c8e 100644 --- a/drivers/gpio/gpio-nomadik.c +++ b/drivers/gpio/gpio-nomadik.c @@ -58,7 +58,6 @@ struct nmk_gpio_chip { u32 rwimsc; u32 fwimsc; u32 slpm; - u32 enabled; u32 pull_up; }; @@ -276,6 +275,8 @@ static void nmk_gpio_glitch_slpm_init(unsigned int *slpm) if (!chip) break; + clk_enable(chip->clk); + slpm[i] = readl(chip->addr + NMK_GPIO_SLPC); writel(temp, chip->addr + NMK_GPIO_SLPC); } @@ -292,6 +293,8 @@ static void nmk_gpio_glitch_slpm_restore(unsigned int *slpm) break; writel(slpm[i], chip->addr + NMK_GPIO_SLPC); + + clk_disable(chip->clk); } } @@ -336,10 +339,12 @@ static int __nmk_config_pins(pin_cfg_t *cfgs, int num, bool sleep) break; } + clk_enable(nmk_chip->clk); spin_lock(&nmk_chip->lock); __nmk_config_pin(nmk_chip, pin - nmk_chip->chip.base, cfgs[i], sleep, glitch ? slpm : NULL); spin_unlock(&nmk_chip->lock); + clk_disable(nmk_chip->clk); } if (glitch) @@ -424,6 +429,7 @@ int nmk_gpio_set_slpm(int gpio, enum nmk_gpio_slpm mode) if (!nmk_chip) return -EINVAL; + clk_enable(nmk_chip->clk); spin_lock_irqsave(&nmk_gpio_slpm_lock, flags); spin_lock(&nmk_chip->lock); @@ -431,6 +437,7 @@ int nmk_gpio_set_slpm(int gpio, enum nmk_gpio_slpm mode) spin_unlock(&nmk_chip->lock); spin_unlock_irqrestore(&nmk_gpio_slpm_lock, flags); + clk_disable(nmk_chip->clk); return 0; } @@ -457,9 +464,11 @@ int nmk_gpio_set_pull(int gpio, enum nmk_gpio_pull pull) if (!nmk_chip) return -EINVAL; + clk_enable(nmk_chip->clk); spin_lock_irqsave(&nmk_chip->lock, flags); __nmk_gpio_set_pull(nmk_chip, gpio - nmk_chip->chip.base, pull); spin_unlock_irqrestore(&nmk_chip->lock, flags); + clk_disable(nmk_chip->clk); return 0; } @@ -483,9 +492,11 @@ int nmk_gpio_set_mode(int gpio, int gpio_mode) if (!nmk_chip) return -EINVAL; + clk_enable(nmk_chip->clk); spin_lock_irqsave(&nmk_chip->lock, flags); __nmk_gpio_set_mode(nmk_chip, gpio - nmk_chip->chip.base, gpio_mode); spin_unlock_irqrestore(&nmk_chip->lock, flags); + clk_disable(nmk_chip->clk); return 0; } @@ -502,9 +513,13 @@ int nmk_gpio_get_mode(int gpio) bit = 1 << (gpio - nmk_chip->chip.base); + clk_enable(nmk_chip->clk); + afunc = readl(nmk_chip->addr + NMK_GPIO_AFSLA) & bit; bfunc = readl(nmk_chip->addr + NMK_GPIO_AFSLB) & bit; + clk_disable(nmk_chip->clk); + return (afunc ? NMK_GPIO_ALT_A : 0) | (bfunc ? NMK_GPIO_ALT_B : 0); } EXPORT_SYMBOL(nmk_gpio_get_mode); @@ -525,7 +540,10 @@ static void nmk_gpio_irq_ack(struct irq_data *d) nmk_chip = irq_data_get_irq_chip_data(d); if (!nmk_chip) return; + + clk_enable(nmk_chip->clk); writel(nmk_gpio_get_bitmask(gpio), nmk_chip->addr + NMK_GPIO_IC); + clk_disable(nmk_chip->clk); } enum nmk_gpio_irq_type { @@ -586,11 +604,7 @@ static int nmk_gpio_irq_maskunmask(struct irq_data *d, bool enable) if (!nmk_chip) return -EINVAL; - if (enable) - nmk_chip->enabled |= bitmask; - else - nmk_chip->enabled &= ~bitmask; - + clk_enable(nmk_chip->clk); spin_lock_irqsave(&nmk_gpio_slpm_lock, flags); spin_lock(&nmk_chip->lock); @@ -601,6 +615,7 @@ static int nmk_gpio_irq_maskunmask(struct irq_data *d, bool enable) spin_unlock(&nmk_chip->lock); spin_unlock_irqrestore(&nmk_gpio_slpm_lock, flags); + clk_disable(nmk_chip->clk); return 0; } @@ -628,10 +643,11 @@ static int nmk_gpio_irq_set_wake(struct irq_data *d, unsigned int on) return -EINVAL; bitmask = nmk_gpio_get_bitmask(gpio); + clk_enable(nmk_chip->clk); spin_lock_irqsave(&nmk_gpio_slpm_lock, flags); spin_lock(&nmk_chip->lock); - if (!(nmk_chip->enabled & bitmask)) + if (irqd_irq_disabled(d)) __nmk_gpio_set_wake(nmk_chip, gpio, on); if (on) @@ -641,13 +657,15 @@ static int nmk_gpio_irq_set_wake(struct irq_data *d, unsigned int on) spin_unlock(&nmk_chip->lock); spin_unlock_irqrestore(&nmk_gpio_slpm_lock, flags); + clk_disable(nmk_chip->clk); return 0; } static int nmk_gpio_irq_set_type(struct irq_data *d, unsigned int type) { - bool enabled, wake = irqd_is_wakeup_set(d); + bool enabled = !irqd_irq_disabled(d); + bool wake = irqd_is_wakeup_set(d); int gpio; struct nmk_gpio_chip *nmk_chip; unsigned long flags; @@ -664,8 +682,7 @@ static int nmk_gpio_irq_set_type(struct irq_data *d, unsigned int type) if (type & IRQ_TYPE_LEVEL_LOW) return -EINVAL; - enabled = nmk_chip->enabled & bitmask; - + clk_enable(nmk_chip->clk); spin_lock_irqsave(&nmk_chip->lock, flags); if (enabled) @@ -689,10 +706,28 @@ static int nmk_gpio_irq_set_type(struct irq_data *d, unsigned int type) __nmk_gpio_irq_modify(nmk_chip, gpio, WAKE, true); spin_unlock_irqrestore(&nmk_chip->lock, flags); + clk_disable(nmk_chip->clk); return 0; } +static unsigned int nmk_gpio_irq_startup(struct irq_data *d) +{ + struct nmk_gpio_chip *nmk_chip = irq_data_get_irq_chip_data(d); + + clk_enable(nmk_chip->clk); + nmk_gpio_irq_unmask(d); + return 0; +} + +static void nmk_gpio_irq_shutdown(struct irq_data *d) +{ + struct nmk_gpio_chip *nmk_chip = irq_data_get_irq_chip_data(d); + + nmk_gpio_irq_mask(d); + clk_disable(nmk_chip->clk); +} + static struct irq_chip nmk_gpio_irq_chip = { .name = "Nomadik-GPIO", .irq_ack = nmk_gpio_irq_ack, @@ -700,6 +735,8 @@ static struct irq_chip nmk_gpio_irq_chip = { .irq_unmask = nmk_gpio_irq_unmask, .irq_set_type = nmk_gpio_irq_set_type, .irq_set_wake = nmk_gpio_irq_set_wake, + .irq_startup = nmk_gpio_irq_startup, + .irq_shutdown = nmk_gpio_irq_shutdown, }; static void __nmk_gpio_irq_handler(unsigned int irq, struct irq_desc *desc, @@ -726,7 +763,11 @@ static void __nmk_gpio_irq_handler(unsigned int irq, struct irq_desc *desc, static void nmk_gpio_irq_handler(unsigned int irq, struct irq_desc *desc) { struct nmk_gpio_chip *nmk_chip = irq_get_handler_data(irq); - u32 status = readl(nmk_chip->addr + NMK_GPIO_IS); + u32 status; + + clk_enable(nmk_chip->clk); + status = readl(nmk_chip->addr + NMK_GPIO_IS); + clk_disable(nmk_chip->clk); __nmk_gpio_irq_handler(irq, desc, status); } @@ -772,7 +813,12 @@ static int nmk_gpio_make_input(struct gpio_chip *chip, unsigned offset) struct nmk_gpio_chip *nmk_chip = container_of(chip, struct nmk_gpio_chip, chip); + clk_enable(nmk_chip->clk); + writel(1 << offset, nmk_chip->addr + NMK_GPIO_DIRC); + + clk_disable(nmk_chip->clk); + return 0; } @@ -781,8 +827,15 @@ static int nmk_gpio_get_input(struct gpio_chip *chip, unsigned offset) struct nmk_gpio_chip *nmk_chip = container_of(chip, struct nmk_gpio_chip, chip); u32 bit = 1 << offset; + int value; + + clk_enable(nmk_chip->clk); - return (readl(nmk_chip->addr + NMK_GPIO_DAT) & bit) != 0; + value = (readl(nmk_chip->addr + NMK_GPIO_DAT) & bit) != 0; + + clk_disable(nmk_chip->clk); + + return value; } static void nmk_gpio_set_output(struct gpio_chip *chip, unsigned offset, @@ -791,7 +844,11 @@ static void nmk_gpio_set_output(struct gpio_chip *chip, unsigned offset, struct nmk_gpio_chip *nmk_chip = container_of(chip, struct nmk_gpio_chip, chip); + clk_enable(nmk_chip->clk); + __nmk_gpio_set_output(nmk_chip, offset, val); + + clk_disable(nmk_chip->clk); } static int nmk_gpio_make_output(struct gpio_chip *chip, unsigned offset, @@ -800,8 +857,12 @@ static int nmk_gpio_make_output(struct gpio_chip *chip, unsigned offset, struct nmk_gpio_chip *nmk_chip = container_of(chip, struct nmk_gpio_chip, chip); + clk_enable(nmk_chip->clk); + __nmk_gpio_make_output(nmk_chip, offset, val); + clk_disable(nmk_chip->clk); + return 0; } @@ -832,6 +893,8 @@ static void nmk_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip) [NMK_GPIO_ALT_C] = "altC", }; + clk_enable(nmk_chip->clk); + for (i = 0; i < chip->ngpio; i++, gpio++) { const char *label = gpiochip_is_requested(chip, i); bool pull; @@ -876,6 +939,8 @@ static void nmk_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip) seq_printf(s, "\n"); } + + clk_disable(nmk_chip->clk); } #else @@ -893,6 +958,34 @@ static struct gpio_chip nmk_gpio_template = { .can_sleep = 0, }; +void nmk_gpio_clocks_enable(void) +{ + int i; + + for (i = 0; i < NUM_BANKS; i++) { + struct nmk_gpio_chip *chip = nmk_gpio_chips[i]; + + if (!chip) + continue; + + clk_enable(chip->clk); + } +} + +void nmk_gpio_clocks_disable(void) +{ + int i; + + for (i = 0; i < NUM_BANKS; i++) { + struct nmk_gpio_chip *chip = nmk_gpio_chips[i]; + + if (!chip) + continue; + + clk_disable(chip->clk); + } +} + /* * Called from the suspend/resume path to only keep the real wakeup interrupts * (those that have had set_irq_wake() called on them) as wakeup interrupts, @@ -912,6 +1005,8 @@ void nmk_gpio_wakeups_suspend(void) if (!chip) break; + clk_enable(chip->clk); + chip->rwimsc = readl(chip->addr + NMK_GPIO_RWIMSC); chip->fwimsc = readl(chip->addr + NMK_GPIO_FWIMSC); @@ -926,6 +1021,8 @@ void nmk_gpio_wakeups_suspend(void) /* 0 -> wakeup enable */ writel(~chip->real_wake, chip->addr + NMK_GPIO_SLPC); } + + clk_disable(chip->clk); } } @@ -939,11 +1036,15 @@ void nmk_gpio_wakeups_resume(void) if (!chip) break; + clk_enable(chip->clk); + writel(chip->rwimsc, chip->addr + NMK_GPIO_RWIMSC); writel(chip->fwimsc, chip->addr + NMK_GPIO_FWIMSC); if (chip->sleepmode) writel(chip->slpm, chip->addr + NMK_GPIO_SLPC); + + clk_disable(chip->clk); } } @@ -1010,8 +1111,6 @@ static int __devinit nmk_gpio_probe(struct platform_device *dev) goto out_release; } - clk_enable(clk); - nmk_chip = kzalloc(sizeof(*nmk_chip), GFP_KERNEL); if (!nmk_chip) { ret = -ENOMEM; diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c index c43b8ff626a7..a3fef0c94ba6 100644 --- a/drivers/gpio/gpio-pca953x.c +++ b/drivers/gpio/gpio-pca953x.c @@ -595,9 +595,6 @@ static int __devinit device_pca953x_init(struct pca953x_chip *chip, int invert) /* set platform specific polarity inversion */ ret = pca953x_write_reg(chip, PCA953X_INVERT, invert); - if (ret) - goto out; - return 0; out: return ret; } @@ -639,7 +636,7 @@ static int __devinit pca953x_probe(struct i2c_client *client, struct pca953x_platform_data *pdata; struct pca953x_chip *chip; int irq_base=0, invert=0; - int ret = 0; + int ret; chip = kzalloc(sizeof(struct pca953x_chip), GFP_KERNEL); if (chip == NULL) @@ -672,10 +669,10 @@ static int __devinit pca953x_probe(struct i2c_client *client, pca953x_setup_gpio(chip, id->driver_data & PCA_GPIO_MASK); if (chip->chip_type == PCA953X_TYPE) - device_pca953x_init(chip, invert); - else if (chip->chip_type == PCA957X_TYPE) - device_pca957x_init(chip, invert); + 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); diff --git a/drivers/gpio/gpio-pch.c b/drivers/gpio/gpio-pch.c index 36919e77c495..1e8a4a538810 100644 --- a/drivers/gpio/gpio-pch.c +++ b/drivers/gpio/gpio-pch.c @@ -17,9 +17,17 @@ #include <linux/kernel.h> #include <linux/pci.h> #include <linux/gpio.h> +#include <linux/interrupt.h> +#include <linux/irq.h> -#define PCH_GPIO_ALL_PINS 0xfff /* Mask for GPIO pins 0 to 11 */ -#define GPIO_NUM_PINS 12 /* Specifies number of GPIO PINS GPIO0-GPIO11 */ +#define PCH_EDGE_FALLING 0 +#define PCH_EDGE_RISING BIT(0) +#define PCH_LEVEL_L BIT(1) +#define PCH_LEVEL_H (BIT(0) | BIT(1)) +#define PCH_EDGE_BOTH BIT(2) +#define PCH_IM_MASK (BIT(0) | BIT(1) | BIT(2)) + +#define PCH_IRQ_BASE 24 struct pch_regs { u32 ien; @@ -33,18 +41,43 @@ struct pch_regs { u32 pm; u32 im0; u32 im1; - u32 reserved[4]; + u32 reserved[3]; + u32 gpio_use_sel; u32 reset; }; +enum pch_type_t { + INTEL_EG20T_PCH, + OKISEMI_ML7223m_IOH, /* OKISEMI ML7223 IOH PCIe Bus-m */ + OKISEMI_ML7223n_IOH /* OKISEMI ML7223 IOH PCIe Bus-n */ +}; + +/* Specifies number of GPIO PINS */ +static int gpio_pins[] = { + [INTEL_EG20T_PCH] = 12, + [OKISEMI_ML7223m_IOH] = 8, + [OKISEMI_ML7223n_IOH] = 8, +}; + /** * struct pch_gpio_reg_data - The register store data. + * @ien_reg: To store contents of IEN register. + * @imask_reg: To store contents of IMASK register. * @po_reg: To store contents of PO register. * @pm_reg: To store contents of PM register. + * @im0_reg: To store contents of IM0 register. + * @im1_reg: To store contents of IM1 register. + * @gpio_use_sel_reg : To store contents of GPIO_USE_SEL register. + * (Only ML7223 Bus-n) */ struct pch_gpio_reg_data { + u32 ien_reg; + u32 imask_reg; u32 po_reg; u32 pm_reg; + u32 im0_reg; + u32 im1_reg; + u32 gpio_use_sel_reg; }; /** @@ -55,6 +88,12 @@ struct pch_gpio_reg_data { * @gpio: Data for GPIO infrastructure. * @pch_gpio_reg: Memory mapped Register data is saved here * when suspend. + * @lock: Used for register access protection + * @irq_base: Save base of IRQ number for interrupt + * @ioh: IOH ID + * @spinlock: Used for register access protection in + * interrupt context pch_irq_mask, + * pch_irq_unmask and pch_irq_type; */ struct pch_gpio { void __iomem *base; @@ -63,6 +102,9 @@ struct pch_gpio { struct gpio_chip gpio; struct pch_gpio_reg_data pch_gpio_reg; struct mutex lock; + int irq_base; + enum pch_type_t ioh; + spinlock_t spinlock; }; static void pch_gpio_set(struct gpio_chip *gpio, unsigned nr, int val) @@ -96,7 +138,7 @@ static int pch_gpio_direction_output(struct gpio_chip *gpio, unsigned nr, u32 reg_val; mutex_lock(&chip->lock); - pm = ioread32(&chip->reg->pm) & PCH_GPIO_ALL_PINS; + pm = ioread32(&chip->reg->pm) & ((1 << gpio_pins[chip->ioh]) - 1); pm |= (1 << nr); iowrite32(pm, &chip->reg->pm); @@ -118,7 +160,7 @@ static int pch_gpio_direction_input(struct gpio_chip *gpio, unsigned nr) u32 pm; mutex_lock(&chip->lock); - pm = ioread32(&chip->reg->pm) & PCH_GPIO_ALL_PINS; /*bits 0-11*/ + pm = ioread32(&chip->reg->pm) & ((1 << gpio_pins[chip->ioh]) - 1); pm &= ~(1 << nr); iowrite32(pm, &chip->reg->pm); mutex_unlock(&chip->lock); @@ -131,8 +173,16 @@ static int pch_gpio_direction_input(struct gpio_chip *gpio, unsigned nr) */ static void pch_gpio_save_reg_conf(struct pch_gpio *chip) { + chip->pch_gpio_reg.ien_reg = ioread32(&chip->reg->ien); + chip->pch_gpio_reg.imask_reg = ioread32(&chip->reg->imask); chip->pch_gpio_reg.po_reg = ioread32(&chip->reg->po); chip->pch_gpio_reg.pm_reg = ioread32(&chip->reg->pm); + chip->pch_gpio_reg.im0_reg = ioread32(&chip->reg->im0); + if (chip->ioh == INTEL_EG20T_PCH) + chip->pch_gpio_reg.im1_reg = ioread32(&chip->reg->im1); + if (chip->ioh == OKISEMI_ML7223n_IOH) + chip->pch_gpio_reg.gpio_use_sel_reg =\ + ioread32(&chip->reg->gpio_use_sel); } /* @@ -140,10 +190,24 @@ static void pch_gpio_save_reg_conf(struct pch_gpio *chip) */ static void pch_gpio_restore_reg_conf(struct pch_gpio *chip) { + iowrite32(chip->pch_gpio_reg.ien_reg, &chip->reg->ien); + iowrite32(chip->pch_gpio_reg.imask_reg, &chip->reg->imask); /* to store contents of PO register */ iowrite32(chip->pch_gpio_reg.po_reg, &chip->reg->po); /* to store contents of PM register */ iowrite32(chip->pch_gpio_reg.pm_reg, &chip->reg->pm); + iowrite32(chip->pch_gpio_reg.im0_reg, &chip->reg->im0); + if (chip->ioh == INTEL_EG20T_PCH) + iowrite32(chip->pch_gpio_reg.im1_reg, &chip->reg->im1); + if (chip->ioh == OKISEMI_ML7223n_IOH) + iowrite32(chip->pch_gpio_reg.gpio_use_sel_reg, + &chip->reg->gpio_use_sel); +} + +static int pch_gpio_to_irq(struct gpio_chip *gpio, unsigned offset) +{ + struct pch_gpio *chip = container_of(gpio, struct pch_gpio, gpio); + return chip->irq_base + offset; } static void pch_gpio_setup(struct pch_gpio *chip) @@ -158,8 +222,132 @@ static void pch_gpio_setup(struct pch_gpio *chip) gpio->set = pch_gpio_set; gpio->dbg_show = NULL; gpio->base = -1; - gpio->ngpio = GPIO_NUM_PINS; + gpio->ngpio = gpio_pins[chip->ioh]; gpio->can_sleep = 0; + gpio->to_irq = pch_gpio_to_irq; +} + +static int pch_irq_type(struct irq_data *d, unsigned int type) +{ + u32 im; + u32 *im_reg; + u32 ien; + u32 im_pos; + int ch; + unsigned long flags; + u32 val; + int irq = d->irq; + struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); + struct pch_gpio *chip = gc->private; + + ch = irq - chip->irq_base; + if (irq <= chip->irq_base + 7) { + im_reg = &chip->reg->im0; + im_pos = ch; + } else { + im_reg = &chip->reg->im1; + im_pos = ch - 8; + } + dev_dbg(chip->dev, "%s:irq=%d type=%d ch=%d pos=%d\n", + __func__, irq, type, ch, im_pos); + + spin_lock_irqsave(&chip->spinlock, flags); + + switch (type) { + case IRQ_TYPE_EDGE_RISING: + val = PCH_EDGE_RISING; + break; + case IRQ_TYPE_EDGE_FALLING: + val = PCH_EDGE_FALLING; + break; + case IRQ_TYPE_EDGE_BOTH: + val = PCH_EDGE_BOTH; + break; + case IRQ_TYPE_LEVEL_HIGH: + val = PCH_LEVEL_H; + break; + case IRQ_TYPE_LEVEL_LOW: + val = PCH_LEVEL_L; + break; + case IRQ_TYPE_PROBE: + goto end; + default: + dev_warn(chip->dev, "%s: unknown type(%dd)", + __func__, type); + goto end; + } + + /* Set interrupt mode */ + im = ioread32(im_reg) & ~(PCH_IM_MASK << (im_pos * 4)); + iowrite32(im | (val << (im_pos * 4)), im_reg); + + /* iclr */ + iowrite32(BIT(ch), &chip->reg->iclr); + + /* IMASKCLR */ + iowrite32(BIT(ch), &chip->reg->imaskclr); + + /* Enable interrupt */ + ien = ioread32(&chip->reg->ien); + iowrite32(ien | BIT(ch), &chip->reg->ien); +end: + spin_unlock_irqrestore(&chip->spinlock, flags); + + return 0; +} + +static void pch_irq_unmask(struct irq_data *d) +{ + struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); + struct pch_gpio *chip = gc->private; + + iowrite32(1 << (d->irq - chip->irq_base), &chip->reg->imaskclr); +} + +static void pch_irq_mask(struct irq_data *d) +{ + struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); + struct pch_gpio *chip = gc->private; + + iowrite32(1 << (d->irq - chip->irq_base), &chip->reg->imask); +} + +static irqreturn_t pch_gpio_handler(int irq, void *dev_id) +{ + struct pch_gpio *chip = dev_id; + u32 reg_val = ioread32(&chip->reg->istatus); + int i; + int ret = IRQ_NONE; + + for (i = 0; i < gpio_pins[chip->ioh]; i++) { + if (reg_val & BIT(i)) { + dev_dbg(chip->dev, "%s:[%d]:irq=%d status=0x%x\n", + __func__, i, irq, reg_val); + iowrite32(BIT(i), &chip->reg->iclr); + generic_handle_irq(chip->irq_base + i); + ret = IRQ_HANDLED; + } + } + return ret; +} + +static __devinit void pch_gpio_alloc_generic_chip(struct pch_gpio *chip, + unsigned int irq_start, unsigned int num) +{ + struct irq_chip_generic *gc; + struct irq_chip_type *ct; + + gc = irq_alloc_generic_chip("pch_gpio", 1, irq_start, chip->base, + handle_simple_irq); + gc->private = chip; + ct = gc->chip_types; + + ct->chip.irq_mask = pch_irq_mask; + ct->chip.irq_unmask = pch_irq_unmask; + ct->chip.irq_set_type = pch_irq_type; + + irq_setup_generic_chip(gc, IRQ_MSK(num), IRQ_GC_INIT_MASK_CACHE, + IRQ_NOREQUEST | IRQ_NOPROBE, 0); } static int __devinit pch_gpio_probe(struct pci_dev *pdev, @@ -167,6 +355,7 @@ static int __devinit pch_gpio_probe(struct pci_dev *pdev, { s32 ret; struct pch_gpio *chip; + int irq_base; chip = kzalloc(sizeof(*chip), GFP_KERNEL); if (chip == NULL) @@ -192,6 +381,13 @@ static int __devinit pch_gpio_probe(struct pci_dev *pdev, goto err_iomap; } + if (pdev->device == 0x8803) + chip->ioh = INTEL_EG20T_PCH; + else if (pdev->device == 0x8014) + chip->ioh = OKISEMI_ML7223m_IOH; + else if (pdev->device == 0x8043) + chip->ioh = OKISEMI_ML7223n_IOH; + chip->reg = chip->base; pci_set_drvdata(pdev, chip); mutex_init(&chip->lock); @@ -202,8 +398,36 @@ static int __devinit pch_gpio_probe(struct pci_dev *pdev, goto err_gpiochip_add; } + irq_base = irq_alloc_descs(-1, 0, gpio_pins[chip->ioh], NUMA_NO_NODE); + if (irq_base < 0) { + dev_warn(&pdev->dev, "PCH gpio: Failed to get IRQ base num\n"); + chip->irq_base = -1; + goto end; + } + chip->irq_base = irq_base; + + ret = request_irq(pdev->irq, pch_gpio_handler, + IRQF_SHARED, KBUILD_MODNAME, chip); + if (ret != 0) { + dev_err(&pdev->dev, + "%s request_irq failed\n", __func__); + goto err_request_irq; + } + + pch_gpio_alloc_generic_chip(chip, irq_base, gpio_pins[chip->ioh]); + + /* Initialize interrupt ien register */ + iowrite32(0, &chip->reg->ien); +end: return 0; +err_request_irq: + irq_free_descs(irq_base, gpio_pins[chip->ioh]); + + ret = gpiochip_remove(&chip->gpio); + if (ret) + dev_err(&pdev->dev, "%s gpiochip_remove failed\n", __func__); + err_gpiochip_add: pci_iounmap(pdev, chip->base); @@ -224,6 +448,12 @@ static void __devexit pch_gpio_remove(struct pci_dev *pdev) int err; struct pch_gpio *chip = pci_get_drvdata(pdev); + if (chip->irq_base != -1) { + free_irq(pdev->irq, chip); + + irq_free_descs(chip->irq_base, gpio_pins[chip->ioh]); + } + err = gpiochip_remove(&chip->gpio); if (err) dev_err(&pdev->dev, "Failed gpiochip_remove\n"); @@ -239,9 +469,11 @@ static int pch_gpio_suspend(struct pci_dev *pdev, pm_message_t state) { s32 ret; struct pch_gpio *chip = pci_get_drvdata(pdev); + unsigned long flags; + spin_lock_irqsave(&chip->spinlock, flags); pch_gpio_save_reg_conf(chip); - pch_gpio_restore_reg_conf(chip); + spin_unlock_irqrestore(&chip->spinlock, flags); ret = pci_save_state(pdev); if (ret) { @@ -261,6 +493,7 @@ static int pch_gpio_resume(struct pci_dev *pdev) { s32 ret; struct pch_gpio *chip = pci_get_drvdata(pdev); + unsigned long flags; ret = pci_enable_wake(pdev, PCI_D0, 0); @@ -272,9 +505,11 @@ static int pch_gpio_resume(struct pci_dev *pdev) } pci_restore_state(pdev); + spin_lock_irqsave(&chip->spinlock, flags); iowrite32(0x01, &chip->reg->reset); iowrite32(0x00, &chip->reg->reset); pch_gpio_restore_reg_conf(chip); + spin_unlock_irqrestore(&chip->spinlock, flags); return 0; } @@ -287,6 +522,7 @@ static int pch_gpio_resume(struct pci_dev *pdev) static DEFINE_PCI_DEVICE_TABLE(pch_gpio_pcidev_id) = { { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x8803) }, { PCI_DEVICE(PCI_VENDOR_ID_ROHM, 0x8014) }, + { PCI_DEVICE(PCI_VENDOR_ID_ROHM, 0x8043) }, { 0, } }; MODULE_DEVICE_TABLE(pci, pch_gpio_pcidev_id); diff --git a/drivers/gpio/gpio-pl061.c b/drivers/gpio/gpio-pl061.c index 2c5a18f32bf3..093c90bd3c1d 100644 --- a/drivers/gpio/gpio-pl061.c +++ b/drivers/gpio/gpio-pl061.c @@ -118,7 +118,7 @@ static int pl061_to_irq(struct gpio_chip *gc, unsigned offset) { struct pl061_gpio *chip = container_of(gc, struct pl061_gpio, gc); - if (chip->irq_base == (unsigned) -1) + if (chip->irq_base == NO_IRQ) return -EINVAL; return chip->irq_base + offset; @@ -246,6 +246,18 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id) if (chip == NULL) return -ENOMEM; + pdata = dev->dev.platform_data; + if (pdata) { + chip->gc.base = pdata->gpio_base; + chip->irq_base = pdata->irq_base; + } else if (dev->dev.of_node) { + chip->gc.base = -1; + chip->irq_base = NO_IRQ; + } else { + ret = -ENODEV; + goto free_mem; + } + if (!request_mem_region(dev->res.start, resource_size(&dev->res), "pl061")) { ret = -EBUSY; @@ -267,14 +279,11 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id) chip->gc.get = pl061_get_value; chip->gc.set = pl061_set_value; chip->gc.to_irq = pl061_to_irq; - chip->gc.base = pdata->gpio_base; chip->gc.ngpio = PL061_GPIO_NR; chip->gc.label = dev_name(&dev->dev); chip->gc.dev = &dev->dev; chip->gc.owner = THIS_MODULE; - chip->irq_base = pdata->irq_base; - ret = gpiochip_add(&chip->gc); if (ret) goto iounmap; @@ -283,7 +292,7 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id) * irq_chip support */ - if (chip->irq_base == (unsigned) -1) + if (chip->irq_base == NO_IRQ) return 0; writeb(0, chip->base + GPIOIE); /* disable irqs */ @@ -307,11 +316,13 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id) list_add(&chip->list, chip_list); for (i = 0; i < PL061_GPIO_NR; i++) { - if (pdata->directions & (1 << i)) - pl061_direction_output(&chip->gc, i, - pdata->values & (1 << i)); - else - pl061_direction_input(&chip->gc, i); + if (pdata) { + if (pdata->directions & (1 << i)) + pl061_direction_output(&chip->gc, i, + pdata->values & (1 << i)); + else + pl061_direction_input(&chip->gc, i); + } irq_set_chip_and_handler(i + chip->irq_base, &pl061_irqchip, handle_simple_irq); |
