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authorAlex Raimondi <raimondi@miromico.ch>2008-11-04 23:37:10 +0100
committerHaavard Skinnemoen <haavard.skinnemoen@atmel.com>2009-01-05 12:16:13 +0100
commitadde42b5834ed367ef7455d465bd9610190ad2a0 (patch)
tree77300eed45fbe2f67f458bbd3b1ab022b7f82894 /arch/avr32/mach-at32ap
parent45f926912fb960c7c09c12906143b9dbaddf58cb (diff)
downloadop-kernel-dev-adde42b5834ed367ef7455d465bd9610190ad2a0.zip
op-kernel-dev-adde42b5834ed367ef7455d465bd9610190ad2a0.tar.gz
avr32: Allow reserving multiple pins at once
at32_reserve_pin now takes an u32 bitmask rather than a single pin. This allows to reserve multiple pins at once. Remove (undocumented) SDCS (pin PE26) from reservation in board setup code. Signed-off-by: Alex Raimondi <raimondi@miromico.ch> Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Diffstat (limited to 'arch/avr32/mach-at32ap')
-rw-r--r--arch/avr32/mach-at32ap/include/mach/at32ap700x.h3
-rw-r--r--arch/avr32/mach-at32ap/include/mach/portmux.h2
-rw-r--r--arch/avr32/mach-at32ap/pio.c19
3 files changed, 17 insertions, 7 deletions
diff --git a/arch/avr32/mach-at32ap/include/mach/at32ap700x.h b/arch/avr32/mach-at32ap/include/mach/at32ap700x.h
index a77d372..5c4c971 100644
--- a/arch/avr32/mach-at32ap/include/mach/at32ap700x.h
+++ b/arch/avr32/mach-at32ap/include/mach/at32ap700x.h
@@ -211,4 +211,7 @@
#define ATMEL_LCDC_ALT_15BIT (ATMEL_LCDC_CONTROL | ATMEL_LCDC_ALT_15B_DATA)
+/* Bitmask for all EBI data (D16..D31) pins on port E */
+#define ATMEL_EBI_PE_DATA_ALL (0x0000FFFF)
+
#endif /* __ASM_ARCH_AT32AP700X_H__ */
diff --git a/arch/avr32/mach-at32ap/include/mach/portmux.h b/arch/avr32/mach-at32ap/include/mach/portmux.h
index 21c7937..4873024 100644
--- a/arch/avr32/mach-at32ap/include/mach/portmux.h
+++ b/arch/avr32/mach-at32ap/include/mach/portmux.h
@@ -25,6 +25,6 @@ void at32_select_periph(unsigned int port, unsigned int pin,
unsigned int periph, unsigned long flags);
void at32_select_gpio(unsigned int pin, unsigned long flags);
void at32_deselect_pin(unsigned int pin);
-void at32_reserve_pin(unsigned int pin);
+void at32_reserve_pin(unsigned int port, u32 pin_mask);
#endif /* __ASM_ARCH_PORTMUX_H__ */
diff --git a/arch/avr32/mach-at32ap/pio.c b/arch/avr32/mach-at32ap/pio.c
index ed81a8b..09a274c 100644
--- a/arch/avr32/mach-at32ap/pio.c
+++ b/arch/avr32/mach-at32ap/pio.c
@@ -167,22 +167,29 @@ void at32_deselect_pin(unsigned int pin)
}
/* Reserve a pin, preventing anyone else from changing its configuration. */
-void __init at32_reserve_pin(unsigned int pin)
+void __init at32_reserve_pin(unsigned int port, u32 pin_mask)
{
struct pio_device *pio;
- unsigned int pin_index = pin & 0x1f;
- pio = gpio_to_pio(pin);
+ /* assign and verify pio */
+ pio = gpio_to_pio(port);
if (unlikely(!pio)) {
- printk("pio: invalid pin %u\n", pin);
+ printk(KERN_WARNING "pio: invalid port %u\n", port);
goto fail;
}
- if (unlikely(test_and_set_bit(pin_index, &pio->pinmux_mask))) {
- printk("%s: pin %u is busy\n", pio->name, pin_index);
+ /* Test if any of the requested pins is already muxed */
+ spin_lock(&pio_lock);
+ if (unlikely(pio->pinmux_mask & pin_mask)) {
+ printk(KERN_WARNING "%s: pin(s) busy (req. 0x%x, busy 0x%x)\n",
+ pio->name, pin_mask, pio->pinmux_mask & pin_mask);
+ spin_unlock(&pio_lock);
goto fail;
}
+ /* Reserve pins */
+ pio->pinmux_mask |= pin_mask;
+ spin_unlock(&pio_lock);
return;
fail:
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