plat-nomadik: add custom dbg_show for GPIO
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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@ -604,6 +604,97 @@ static int nmk_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
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return NOMADIK_GPIO_TO_IRQ(nmk_chip->chip.base) + offset;
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}
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#ifdef CONFIG_DEBUG_FS
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#include <linux/seq_file.h>
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static void nmk_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
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{
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int mode;
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unsigned i;
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unsigned gpio = chip->base;
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int is_out;
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struct nmk_gpio_chip *nmk_chip =
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container_of(chip, struct nmk_gpio_chip, chip);
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const char *modes[] = {
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[NMK_GPIO_ALT_GPIO] = "gpio",
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[NMK_GPIO_ALT_A] = "altA",
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[NMK_GPIO_ALT_B] = "altB",
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[NMK_GPIO_ALT_C] = "altC",
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};
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for (i = 0; i < chip->ngpio; i++, gpio++) {
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const char *label = gpiochip_is_requested(chip, i);
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bool pull;
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u32 bit = 1 << i;
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if (!label)
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continue;
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is_out = readl(nmk_chip->addr + NMK_GPIO_DIR) & bit;
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pull = !(readl(nmk_chip->addr + NMK_GPIO_PDIS) & bit);
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mode = nmk_gpio_get_mode(gpio);
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seq_printf(s, " gpio-%-3d (%-20.20s) %s %s %s %s",
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gpio, label,
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is_out ? "out" : "in ",
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chip->get
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? (chip->get(chip, i) ? "hi" : "lo")
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: "? ",
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(mode < 0) ? "unknown" : modes[mode],
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pull ? "pull" : "none");
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if (!is_out) {
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int irq = gpio_to_irq(gpio);
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struct irq_desc *desc = irq_to_desc(irq);
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/* This races with request_irq(), set_irq_type(),
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* and set_irq_wake() ... but those are "rare".
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*
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* More significantly, trigger type flags aren't
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* currently maintained by genirq.
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*/
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if (irq >= 0 && desc->action) {
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char *trigger;
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switch (desc->status & IRQ_TYPE_SENSE_MASK) {
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case IRQ_TYPE_NONE:
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trigger = "(default)";
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break;
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case IRQ_TYPE_EDGE_FALLING:
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trigger = "edge-falling";
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break;
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case IRQ_TYPE_EDGE_RISING:
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trigger = "edge-rising";
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break;
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case IRQ_TYPE_EDGE_BOTH:
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trigger = "edge-both";
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break;
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case IRQ_TYPE_LEVEL_HIGH:
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trigger = "level-high";
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break;
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case IRQ_TYPE_LEVEL_LOW:
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trigger = "level-low";
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break;
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default:
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trigger = "?trigger?";
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break;
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}
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seq_printf(s, " irq-%d %s%s",
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irq, trigger,
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(desc->status & IRQ_WAKEUP)
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? " wakeup" : "");
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}
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}
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seq_printf(s, "\n");
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}
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}
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#else
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#define nmk_gpio_dbg_show NULL
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#endif
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/* This structure is replicated for each GPIO block allocated at probe time */
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static struct gpio_chip nmk_gpio_template = {
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.direction_input = nmk_gpio_make_input,
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@ -611,6 +702,7 @@ static struct gpio_chip nmk_gpio_template = {
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.direction_output = nmk_gpio_make_output,
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.set = nmk_gpio_set_output,
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.to_irq = nmk_gpio_to_irq,
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.dbg_show = nmk_gpio_dbg_show,
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.can_sleep = 0,
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};
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