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Commit e6bf3773 authored by Phil Edworthy's avatar Phil Edworthy Committed by Linus Walleij
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gpio: dwapb: Add support for a bus clock



Enable an optional bus clock provided by DT.

Signed-off-by: default avatarPhil Edworthy <phil.edworthy@renesas.com>
Reviewed-by: default avatarAndy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 13b5319e
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+19 −1
Original line number Diff line number Diff line
@@ -8,8 +8,9 @@
 * All enquiries to support@picochip.com
 */
#include <linux/acpi.h>
#include <linux/gpio/driver.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/gpio/driver.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
@@ -98,6 +99,7 @@ struct dwapb_gpio {
	struct irq_domain	*domain;
	unsigned int		flags;
	struct reset_control	*rst;
	struct clk		*clk;
};

static inline u32 gpio_reg_v2_convert(unsigned int offset)
@@ -670,6 +672,16 @@ static int dwapb_gpio_probe(struct platform_device *pdev)
	if (IS_ERR(gpio->regs))
		return PTR_ERR(gpio->regs);

	/* Optional bus clock */
	gpio->clk = devm_clk_get(&pdev->dev, "bus");
	if (!IS_ERR(gpio->clk)) {
		err = clk_prepare_enable(gpio->clk);
		if (err) {
			dev_info(&pdev->dev, "Cannot enable clock\n");
			return err;
		}
	}

	gpio->flags = 0;
	if (dev->of_node) {
		const struct of_device_id *of_devid;
@@ -712,6 +724,7 @@ static int dwapb_gpio_remove(struct platform_device *pdev)
	dwapb_gpio_unregister(gpio);
	dwapb_irq_teardown(gpio);
	reset_control_assert(gpio->rst);
	clk_disable_unprepare(gpio->clk);

	return 0;
}
@@ -757,6 +770,8 @@ static int dwapb_gpio_suspend(struct device *dev)
	}
	spin_unlock_irqrestore(&gc->bgpio_lock, flags);

	clk_disable_unprepare(gpio->clk);

	return 0;
}

@@ -768,6 +783,9 @@ static int dwapb_gpio_resume(struct device *dev)
	unsigned long flags;
	int i;

	if (!IS_ERR(gpio->clk))
		clk_prepare_enable(gpio->clk);

	spin_lock_irqsave(&gc->bgpio_lock, flags);
	for (i = 0; i < gpio->nr_ports; i++) {
		unsigned int offset;