gpio: mvebu: add dbg_show function
This patch adds a dedicated dbg_show function to the gpio-mvebu driver. In addition to the generic gpiolib informations, this function displays informations related with the specific Marvell registers (blink enable, data in polarity, interrupt masks and cause). Signed-off-by: Simon Guinot <simon.guinot@sequanux.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Родитель
047b93a359
Коммит
a4ba5e1b92
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@ -469,6 +469,64 @@ static void mvebu_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
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}
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}
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}
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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 mvebu_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
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{
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struct mvebu_gpio_chip *mvchip =
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container_of(chip, struct mvebu_gpio_chip, chip);
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u32 out, io_conf, blink, in_pol, data_in, cause, edg_msk, lvl_msk;
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int i;
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out = readl_relaxed(mvebu_gpioreg_out(mvchip));
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io_conf = readl_relaxed(mvebu_gpioreg_io_conf(mvchip));
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blink = readl_relaxed(mvebu_gpioreg_blink(mvchip));
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in_pol = readl_relaxed(mvebu_gpioreg_in_pol(mvchip));
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data_in = readl_relaxed(mvebu_gpioreg_data_in(mvchip));
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cause = readl_relaxed(mvebu_gpioreg_edge_cause(mvchip));
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edg_msk = readl_relaxed(mvebu_gpioreg_edge_mask(mvchip));
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lvl_msk = readl_relaxed(mvebu_gpioreg_level_mask(mvchip));
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for (i = 0; i < chip->ngpio; i++) {
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const char *label;
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u32 msk;
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bool is_out;
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label = gpiochip_is_requested(chip, i);
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if (!label)
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continue;
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msk = 1 << i;
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is_out = !(io_conf & msk);
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seq_printf(s, " gpio-%-3d (%-20.20s)", chip->base + i, label);
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if (is_out) {
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seq_printf(s, " out %s %s\n",
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out & msk ? "hi" : "lo",
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blink & msk ? "(blink )" : "");
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continue;
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}
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seq_printf(s, " in %s (act %s) - IRQ",
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(data_in ^ in_pol) & msk ? "hi" : "lo",
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in_pol & msk ? "lo" : "hi");
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if (!((edg_msk | lvl_msk) & msk)) {
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seq_printf(s, " disabled\n");
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continue;
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}
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if (edg_msk & msk)
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seq_printf(s, " edge ");
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if (lvl_msk & msk)
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seq_printf(s, " level");
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seq_printf(s, " (%s)\n", cause & msk ? "pending" : "clear ");
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}
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}
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#else
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#define mvebu_gpio_dbg_show NULL
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#endif
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static struct of_device_id mvebu_gpio_of_match[] = {
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static struct of_device_id mvebu_gpio_of_match[] = {
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{
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{
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.compatible = "marvell,orion-gpio",
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.compatible = "marvell,orion-gpio",
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@ -543,6 +601,7 @@ static int mvebu_gpio_probe(struct platform_device *pdev)
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mvchip->chip.ngpio = ngpios;
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mvchip->chip.ngpio = ngpios;
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mvchip->chip.can_sleep = 0;
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mvchip->chip.can_sleep = 0;
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mvchip->chip.of_node = np;
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mvchip->chip.of_node = np;
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mvchip->chip.dbg_show = mvebu_gpio_dbg_show;
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spin_lock_init(&mvchip->lock);
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spin_lock_init(&mvchip->lock);
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mvchip->membase = devm_ioremap_resource(&pdev->dev, res);
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mvchip->membase = devm_ioremap_resource(&pdev->dev, res);
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