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Commit 5c1e2c9d authored by Stephen Warren's avatar Stephen Warren
Browse files

gpio: tegra: fix register address calculations for Tegra30 



Tegra20 and Tegra30 share the same register layout within registers, but
the addresses of the registers is a little different. Fix the driver to
cope with this.

Signed-off-by: default avatarStephen Warren <swarren@nvidia.com>
Acked-by: default avatarOlof Johansson <olof@lixom.net>
parent dd775ae2

drivers/gpio/gpio-tegra.c

+42 −13
Original line number Diff line number Diff line
@@ -22,7 +22,7 @@ 
#include <linux/interrupt.h>

#include <linux/io.h>

#include <linux/gpio.h>

#include <linux/of.h>

#include <linux/of_device.h>

#include <linux/platform_device.h>

#include <linux/module.h>

#include <linux/irqdomain.h>
@@ -37,7 +37,8 @@ 
#define GPIO_PORT(x)		(((x) >> 3) & 0x3)

#define GPIO_BIT(x)		((x) & 0x7)



#define GPIO_REG(x)		(GPIO_BANK(x) * 0x80 + GPIO_PORT(x) * 4)

#define GPIO_REG(x)		(GPIO_BANK(x) * tegra_gpio_bank_stride + \

					GPIO_PORT(x) * 4)



#define GPIO_CNF(x)		(GPIO_REG(x) + 0x00)

#define GPIO_OE(x)		(GPIO_REG(x) + 0x10)
@@ -48,12 +49,12 @@ 
#define GPIO_INT_LVL(x)		(GPIO_REG(x) + 0x60)

#define GPIO_INT_CLR(x)		(GPIO_REG(x) + 0x70)



#define GPIO_MSK_CNF(x)		(GPIO_REG(x) + 0x800)

#define GPIO_MSK_OE(x)		(GPIO_REG(x) + 0x810)

#define GPIO_MSK_OUT(x)		(GPIO_REG(x) + 0X820)

#define GPIO_MSK_INT_STA(x)	(GPIO_REG(x) + 0x840)

#define GPIO_MSK_INT_ENB(x)	(GPIO_REG(x) + 0x850)

#define GPIO_MSK_INT_LVL(x)	(GPIO_REG(x) + 0x860)

#define GPIO_MSK_CNF(x)		(GPIO_REG(x) + tegra_gpio_upper_offset + 0x00)

#define GPIO_MSK_OE(x)		(GPIO_REG(x) + tegra_gpio_upper_offset + 0x10)

#define GPIO_MSK_OUT(x)		(GPIO_REG(x) + tegra_gpio_upper_offset + 0X20)

#define GPIO_MSK_INT_STA(x)	(GPIO_REG(x) + tegra_gpio_upper_offset + 0x40)

#define GPIO_MSK_INT_ENB(x)	(GPIO_REG(x) + tegra_gpio_upper_offset + 0x50)

#define GPIO_MSK_INT_LVL(x)	(GPIO_REG(x) + tegra_gpio_upper_offset + 0x60)



#define GPIO_INT_LVL_MASK		0x010101

#define GPIO_INT_LVL_EDGE_RISING	0x000101
@@ -78,6 +79,8 @@ struct tegra_gpio_bank { 
static struct irq_domain *irq_domain;

static void __iomem *regs;

static u32 tegra_gpio_bank_count;

static u32 tegra_gpio_bank_stride;

static u32 tegra_gpio_upper_offset;

static struct tegra_gpio_bank *tegra_gpio_banks;



static inline void tegra_gpio_writel(u32 val, u32 reg)
@@ -333,6 +336,26 @@ static struct irq_chip tegra_gpio_irq_chip = { 
#endif

};



struct tegra_gpio_soc_config {

	u32 bank_stride;

	u32 upper_offset;

};



static struct tegra_gpio_soc_config tegra20_gpio_config = {

	.bank_stride = 0x80,

	.upper_offset = 0x800,

};



static struct tegra_gpio_soc_config tegra30_gpio_config = {

	.bank_stride = 0x100,

	.upper_offset = 0x80,

};



static struct of_device_id tegra_gpio_of_match[] __devinitdata = {

	{ .compatible = "nvidia,tegra30-gpio", .data = &tegra30_gpio_config },

	{ .compatible = "nvidia,tegra20-gpio", .data = &tegra20_gpio_config },

	{ },

};



/* This lock class tells lockdep that GPIO irqs are in a different

 * category than their parents, so it won't report false recursion.
@@ -341,6 +364,8 @@ static struct lock_class_key gpio_lock_class; 


static int __devinit tegra_gpio_probe(struct platform_device *pdev)

{

	const struct of_device_id *match;

	struct tegra_gpio_soc_config *config;

	int irq_base;

	struct resource *res;

	struct tegra_gpio_bank *bank;
@@ -348,6 +373,15 @@ static int __devinit tegra_gpio_probe(struct platform_device *pdev) 
	int i;

	int j;



	match = of_match_device(tegra_gpio_of_match, &pdev->dev);

	if (match)

		config = (struct tegra_gpio_soc_config *)match->data;

	else

		config = &tegra20_gpio_config;



	tegra_gpio_bank_stride = config->bank_stride;

	tegra_gpio_upper_offset = config->upper_offset;



	for (;;) {

		res = platform_get_resource(pdev, IORESOURCE_IRQ, tegra_gpio_bank_count);

		if (!res)
@@ -441,11 +475,6 @@ static int __devinit tegra_gpio_probe(struct platform_device *pdev) 
	return 0;

}



static struct of_device_id tegra_gpio_of_match[] __devinitdata = {

	{ .compatible = "nvidia,tegra20-gpio", },

	{ },

};



static struct platform_driver tegra_gpio_driver = {

	.driver		= {

		.name	= "tegra-gpio",