@@ -290,12 +290,12 @@ config GPIO_MPC5200
depends on PPC_MPC52xx
config GPIO_MPC8XXX
- bool "MPC512x/MPC8xxx GPIO support"
+ bool "MPC512x/MPC8xxx/QorIQ GPIO support"
depends on PPC_MPC512x || PPC_MPC831x || PPC_MPC834x || PPC_MPC837x || \
- FSL_SOC_BOOKE || PPC_86xx
+ FSL_SOC_BOOKE || PPC_86xx || ARCH_LAYERSCAPE || COMPILE_TEST
help
Say Y here if you're going to use hardware that connects to the
- MPC512x/831x/834x/837x/8572/8610 GPIOs.
+ MPC512x/831x/834x/837x/8572/8610/QorIQ GPIOs.
config GPIO_MSM_V2
tristate "Qualcomm MSM GPIO v2"
@@ -1,5 +1,5 @@
/*
- * GPIOs on MPC512x/8349/8572/8610 and compatible
+ * GPIOs on MPC512x/8349/8572/8610/QorIQ and compatible
*
* Copyright (C) 2008 Peter Korsgaard <jacmet@sunsite.dk>
*
@@ -19,6 +19,7 @@
#include <linux/gpio.h>
#include <linux/slab.h>
#include <linux/irq.h>
+#include <linux/irqdomain.h>
#define MPC8XXX_GPIO_PINS 32
@@ -44,6 +45,27 @@ struct mpc8xxx_gpio_chip {
const void *of_dev_id_data;
};
+static bool gpio_little_endian;
+static inline u32 gpio_in32(void __iomem *addr)
+{
+ u32 val;
+
+ if (gpio_little_endian)
+ val = ioread32(addr);
+ else
+ val = ioread32be(addr);
+
+ return val;
+}
+
+static inline void gpio_out32(u32 val, void __iomem *addr)
+{
+ if (gpio_little_endian)
+ iowrite32(val, addr);
+ else
+ iowrite32be(val, addr);
+}
+
static inline u32 mpc8xxx_gpio2mask(unsigned int gpio)
{
return 1u << (MPC8XXX_GPIO_PINS - 1 - gpio);
@@ -59,9 +81,17 @@ static void mpc8xxx_gpio_save_regs(struct of_mm_gpio_chip *mm)
{
struct mpc8xxx_gpio_chip *mpc8xxx_gc = to_mpc8xxx_gpio_chip(mm);
- mpc8xxx_gc->data = in_be32(mm->regs + GPIO_DAT);
+ mpc8xxx_gc->data = gpio_in32(mm->regs + GPIO_DAT);
}
+/* Generic set and clear bits accessor ports */
+#define bgpio_setbits32(_addr, _v) \
+ gpio_out32(gpio_in32(_addr) | (_v), (_addr))
+#define bgpio_clrbits32(_addr, _v) \
+ gpio_out32(gpio_in32(_addr) & ~(_v), (_addr))
+#define bgpio_clrsetbits32(addr, clear, set) \
+ gpio_out32((gpio_in32(addr) & ~(clear)) | (set), (addr))
+
/* Workaround GPIO 1 errata on MPC8572/MPC8536. The status of GPIOs
* defined as output cannot be determined by reading GPDAT register,
* so we use shadow data register instead. The status of input pins
@@ -74,9 +104,9 @@ static int mpc8572_gpio_get(struct gpio_chip *gc, unsigned int gpio)
struct mpc8xxx_gpio_chip *mpc8xxx_gc = to_mpc8xxx_gpio_chip(mm);
u32 out_mask, out_shadow;
- out_mask = in_be32(mm->regs + GPIO_DIR);
+ out_mask = gpio_in32(mm->regs + GPIO_DIR);
- val = in_be32(mm->regs + GPIO_DAT) & ~out_mask;
+ val = gpio_in32(mm->regs + GPIO_DAT) & ~out_mask;
out_shadow = mpc8xxx_gc->data & out_mask;
return (val | out_shadow) & mpc8xxx_gpio2mask(gpio);
@@ -86,7 +116,7 @@ static int mpc8xxx_gpio_get(struct gpio_chip *gc, unsigned int gpio)
{
struct of_mm_gpio_chip *mm = to_of_mm_gpio_chip(gc);
- return in_be32(mm->regs + GPIO_DAT) & mpc8xxx_gpio2mask(gpio);
+ return gpio_in32(mm->regs + GPIO_DAT) & mpc8xxx_gpio2mask(gpio);
}
static void mpc8xxx_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
@@ -102,7 +132,7 @@ static void mpc8xxx_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
else
mpc8xxx_gc->data &= ~mpc8xxx_gpio2mask(gpio);
- out_be32(mm->regs + GPIO_DAT, mpc8xxx_gc->data);
+ gpio_out32(mpc8xxx_gc->data, mm->regs + GPIO_DAT);
raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
}
@@ -128,7 +158,7 @@ static void mpc8xxx_gpio_set_multiple(struct gpio_chip *gc,
}
}
- out_be32(mm->regs + GPIO_DAT, mpc8xxx_gc->data);
+ gpio_out32(mpc8xxx_gc->data, mm->regs + GPIO_DAT);
raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
}
@@ -141,7 +171,7 @@ static int mpc8xxx_gpio_dir_in(struct gpio_chip *gc, unsigned int gpio)
raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
- clrbits32(mm->regs + GPIO_DIR, mpc8xxx_gpio2mask(gpio));
+ bgpio_clrbits32(mm->regs + GPIO_DIR, mpc8xxx_gpio2mask(gpio));
raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
@@ -158,7 +188,7 @@ static int mpc8xxx_gpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val
raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
- setbits32(mm->regs + GPIO_DIR, mpc8xxx_gpio2mask(gpio));
+ bgpio_setbits32(mm->regs + GPIO_DIR, mpc8xxx_gpio2mask(gpio));
raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
@@ -201,7 +231,8 @@ static void mpc8xxx_gpio_irq_cascade(struct irq_desc *desc)
struct of_mm_gpio_chip *mm = &mpc8xxx_gc->mm_gc;
unsigned int mask;
- mask = in_be32(mm->regs + GPIO_IER) & in_be32(mm->regs + GPIO_IMR);
+ mask = gpio_in32(mm->regs + GPIO_IER)
+ & gpio_in32(mm->regs + GPIO_IMR);
if (mask)
generic_handle_irq(irq_linear_revmap(mpc8xxx_gc->irq,
32 - ffs(mask)));
@@ -217,7 +248,8 @@ static void mpc8xxx_irq_unmask(struct irq_data *d)
raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
- setbits32(mm->regs + GPIO_IMR, mpc8xxx_gpio2mask(irqd_to_hwirq(d)));
+ bgpio_setbits32(mm->regs + GPIO_IMR,
+ mpc8xxx_gpio2mask(irqd_to_hwirq(d)));
raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
}
@@ -230,7 +262,8 @@ static void mpc8xxx_irq_mask(struct irq_data *d)
raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
- clrbits32(mm->regs + GPIO_IMR, mpc8xxx_gpio2mask(irqd_to_hwirq(d)));
+ bgpio_clrbits32(mm->regs + GPIO_IMR,
+ mpc8xxx_gpio2mask(irqd_to_hwirq(d)));
raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
}
@@ -240,7 +273,7 @@ static void mpc8xxx_irq_ack(struct irq_data *d)
struct mpc8xxx_gpio_chip *mpc8xxx_gc = irq_data_get_irq_chip_data(d);
struct of_mm_gpio_chip *mm = &mpc8xxx_gc->mm_gc;
- out_be32(mm->regs + GPIO_IER, mpc8xxx_gpio2mask(irqd_to_hwirq(d)));
+ gpio_out32(mpc8xxx_gpio2mask(irqd_to_hwirq(d)), mm->regs + GPIO_IER);
}
static int mpc8xxx_irq_set_type(struct irq_data *d, unsigned int flow_type)
@@ -252,15 +285,15 @@ static int mpc8xxx_irq_set_type(struct irq_data *d, unsigned int flow_type)
switch (flow_type) {
case IRQ_TYPE_EDGE_FALLING:
raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
- setbits32(mm->regs + GPIO_ICR,
- mpc8xxx_gpio2mask(irqd_to_hwirq(d)));
+ bgpio_setbits32(mm->regs + GPIO_ICR,
+ mpc8xxx_gpio2mask(irqd_to_hwirq(d)));
raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
break;
case IRQ_TYPE_EDGE_BOTH:
raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
- clrbits32(mm->regs + GPIO_ICR,
- mpc8xxx_gpio2mask(irqd_to_hwirq(d)));
+ bgpio_clrbits32(mm->regs + GPIO_ICR,
+ mpc8xxx_gpio2mask(irqd_to_hwirq(d)));
raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
break;
@@ -292,20 +325,20 @@ static int mpc512x_irq_set_type(struct irq_data *d, unsigned int flow_type)
case IRQ_TYPE_EDGE_FALLING:
case IRQ_TYPE_LEVEL_LOW:
raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
- clrsetbits_be32(reg, 3 << shift, 2 << shift);
+ bgpio_clrsetbits32(reg, 3 << shift, 2 << shift);
raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
break;
case IRQ_TYPE_EDGE_RISING:
case IRQ_TYPE_LEVEL_HIGH:
raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
- clrsetbits_be32(reg, 3 << shift, 1 << shift);
+ bgpio_clrsetbits32(reg, 3 << shift, 1 << shift);
raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
break;
case IRQ_TYPE_EDGE_BOTH:
raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
- clrbits32(reg, 3 << shift);
+ bgpio_clrbits32(reg, 3 << shift);
raw_spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
break;
@@ -398,6 +431,14 @@ static int mpc8xxx_probe(struct platform_device *pdev)
mm_gc = &mpc8xxx_gc->mm_gc;
gc = &mm_gc->gc;
+ if (of_property_read_bool(np, "little-endian")) {
+ gpio_little_endian = true;
+ dev_dbg(&pdev->dev, "GPIO REGISTERS are LITTLE endian\n");
+ } else {
+ gpio_little_endian = false;
+ dev_dbg(&pdev->dev, "GPIO REGISTERS are BIG endian\n");
+ }
+
mm_gc->save_regs = mpc8xxx_gpio_save_regs;
gc->ngpio = MPC8XXX_GPIO_PINS;
gc->direction_input = mpc8xxx_gpio_dir_in;
@@ -422,7 +463,7 @@ static int mpc8xxx_probe(struct platform_device *pdev)
return ret;
mpc8xxx_gc->irqn = irq_of_parse_and_map(np, 0);
- if (mpc8xxx_gc->irqn == NO_IRQ)
+ if (mpc8xxx_gc->irqn == 0)
return 0;
mpc8xxx_gc->irq = irq_domain_add_linear(np, MPC8XXX_GPIO_PINS,
@@ -435,8 +476,8 @@ static int mpc8xxx_probe(struct platform_device *pdev)
mpc8xxx_gc->of_dev_id_data = id->data;
/* ack and mask all irqs */
- out_be32(mm_gc->regs + GPIO_IER, 0xffffffff);
- out_be32(mm_gc->regs + GPIO_IMR, 0);
+ gpio_out32(0xffffffff, mm_gc->regs + GPIO_IER);
+ gpio_out32(0, mm_gc->regs + GPIO_IMR);
irq_set_chained_handler_and_data(mpc8xxx_gc->irqn,
mpc8xxx_gpio_irq_cascade, mpc8xxx_gc);