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@@ -323,3 +323,65 @@ gpio_irq_setup(struct pio_device *pio, int irq, int gpio_irq)
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irq_set_chained_handler(irq, gpio_irq_handler);
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}
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+/*--------------------------------------------------------------------------*/
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+
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+#ifdef CONFIG_DEBUG_FS
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+
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+#include <linux/seq_file.h>
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+
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+/*
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+ * This shows more info than the generic gpio dump code:
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+ * pullups, deglitching, open drain drive.
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+ */
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+static void pio_bank_show(struct seq_file *s, struct gpio_chip *chip)
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+{
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+ struct pio_device *pio = container_of(chip, struct pio_device, chip);
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+ u32 psr, osr, imr, pdsr, pusr, ifsr, mdsr;
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+ unsigned i;
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+ u32 mask;
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+ char bank;
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+
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+ psr = pio_readl(pio, PSR);
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+ osr = pio_readl(pio, OSR);
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+ imr = pio_readl(pio, IMR);
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+ pdsr = pio_readl(pio, PDSR);
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+ pusr = pio_readl(pio, PUSR);
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+ ifsr = pio_readl(pio, IFSR);
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+ mdsr = pio_readl(pio, MDSR);
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+
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+ bank = 'A' + pio->pdev->id;
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+
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+ for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
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+ const char *label;
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+
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+ label = gpiochip_is_requested(chip, i);
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+ if (!label && (imr & mask))
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+ label = "[irq]";
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+ if (!label)
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+ continue;
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+
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+ seq_printf(s, " gpio-%-3d P%c%-2d (%-12s) %s %s %s",
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+ chip->base + i, bank, i,
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+ label,
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+ (osr & mask) ? "out" : "in ",
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+ (mask & pdsr) ? "hi" : "lo",
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+ (mask & pusr) ? " " : "up");
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+ if (ifsr & mask)
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+ seq_printf(s, " deglitch");
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+ if ((osr & mdsr) & mask)
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+ seq_printf(s, " open-drain");
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+ if (imr & mask)
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+ seq_printf(s, " irq-%d edge-both",
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+ gpio_to_irq(chip->base + i));
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+ seq_printf(s, "\n");
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+ }
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+}
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+
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+#else
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+#define pio_bank_show NULL
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+#endif
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+
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+
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+/*--------------------------------------------------------------------------*/
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+
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+static int __init pio_probe(struct platform_device *pdev)
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