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提交 aeb27748 编写于 作者: B Benoît Thébaudeau 提交者： Linus Walleij
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gpio/mxc: use the edge_sel feature if available 

Some mxc processors have an edge_sel feature, which allows the IRQ to be
triggered by any edge.

This patch makes use of this feature if available, which skips mxc_flip_edge().

Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Linus Walleij <linus.walleij@stericsson.com>
Acked-by: NSascha Hauer <kernel@pengutronix.de>
Cc: <linux-arm-kernel@lists.infradead.org>
Signed-off-by: NBenoît Thébaudeau <benoit.thebaudeau@advansee.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
上级 41920d16
隐藏空白更改
内联 并排
Showing with 104 addition and 62 deletion
Documentation/devicetree/bindings/gpio/fsl-imx-gpio.txt
浏览文件 @ aeb27748
......@@ -14,7 +14,7 @@ Required properties:
Example:
gpio0: gpio@73f84000 {
compatible = "fsl,imx51-gpio", "fsl,imx31-gpio";
compatible = "fsl,imx51-gpio", "fsl,imx35-gpio";
reg = <0x73f84000 0x4000>;
interrupts = <50 51>;
gpio-controller;
......
arch/arm/boot/dts/imx51.dtsi
浏览文件 @ aeb27748
......@@ -127,7 +127,7 @@
};
gpio1: gpio@73f84000 {
compatible = "fsl,imx51-gpio", "fsl,imx31-gpio";
compatible = "fsl,imx51-gpio", "fsl,imx35-gpio";
reg = <0x73f84000 0x4000>;
interrupts = <50 51>;
gpio-controller;
......@@ -137,7 +137,7 @@
};
gpio2: gpio@73f88000 {
compatible = "fsl,imx51-gpio", "fsl,imx31-gpio";
compatible = "fsl,imx51-gpio", "fsl,imx35-gpio";
reg = <0x73f88000 0x4000>;
interrupts = <52 53>;
gpio-controller;
......@@ -147,7 +147,7 @@
};
gpio3: gpio@73f8c000 {
compatible = "fsl,imx51-gpio", "fsl,imx31-gpio";
compatible = "fsl,imx51-gpio", "fsl,imx35-gpio";
reg = <0x73f8c000 0x4000>;
interrupts = <54 55>;
gpio-controller;
......@@ -157,7 +157,7 @@
};
gpio4: gpio@73f90000 {
compatible = "fsl,imx51-gpio", "fsl,imx31-gpio";
compatible = "fsl,imx51-gpio", "fsl,imx35-gpio";
reg = <0x73f90000 0x4000>;
interrupts = <56 57>;
gpio-controller;
......
arch/arm/boot/dts/imx53.dtsi
浏览文件 @ aeb27748
......@@ -129,7 +129,7 @@
};
gpio1: gpio@53f84000 {
compatible = "fsl,imx53-gpio", "fsl,imx31-gpio";
compatible = "fsl,imx53-gpio", "fsl,imx35-gpio";
reg = <0x53f84000 0x4000>;
interrupts = <50 51>;
gpio-controller;
......@@ -139,7 +139,7 @@
};
gpio2: gpio@53f88000 {
compatible = "fsl,imx53-gpio", "fsl,imx31-gpio";
compatible = "fsl,imx53-gpio", "fsl,imx35-gpio";
reg = <0x53f88000 0x4000>;
interrupts = <52 53>;
gpio-controller;
......@@ -149,7 +149,7 @@
};
gpio3: gpio@53f8c000 {
compatible = "fsl,imx53-gpio", "fsl,imx31-gpio";
compatible = "fsl,imx53-gpio", "fsl,imx35-gpio";
reg = <0x53f8c000 0x4000>;
interrupts = <54 55>;
gpio-controller;
......@@ -159,7 +159,7 @@
};
gpio4: gpio@53f90000 {
compatible = "fsl,imx53-gpio", "fsl,imx31-gpio";
compatible = "fsl,imx53-gpio", "fsl,imx35-gpio";
reg = <0x53f90000 0x4000>;
interrupts = <56 57>;
gpio-controller;
......@@ -197,7 +197,7 @@
};
gpio5: gpio@53fdc000 {
compatible = "fsl,imx53-gpio", "fsl,imx31-gpio";
compatible = "fsl,imx53-gpio", "fsl,imx35-gpio";
reg = <0x53fdc000 0x4000>;
interrupts = <103 104>;
gpio-controller;
......@@ -207,7 +207,7 @@
};
gpio6: gpio@53fe0000 {
compatible = "fsl,imx53-gpio", "fsl,imx31-gpio";
compatible = "fsl,imx53-gpio", "fsl,imx35-gpio";
reg = <0x53fe0000 0x4000>;
interrupts = <105 106>;
gpio-controller;
......@@ -217,7 +217,7 @@
};
gpio7: gpio@53fe4000 {
compatible = "fsl,imx53-gpio", "fsl,imx31-gpio";
compatible = "fsl,imx53-gpio", "fsl,imx35-gpio";
reg = <0x53fe4000 0x4000>;
interrupts = <107 108>;
gpio-controller;
......
arch/arm/boot/dts/imx6q.dtsi
浏览文件 @ aeb27748
......@@ -260,7 +260,7 @@
};
gpio1: gpio@0209c000 {
compatible = "fsl,imx6q-gpio", "fsl,imx31-gpio";
compatible = "fsl,imx6q-gpio", "fsl,imx35-gpio";
reg = <0x0209c000 0x4000>;
interrupts = <0 66 0x04 0 67 0x04>;
gpio-controller;
......@@ -270,7 +270,7 @@
};
gpio2: gpio@020a0000 {
compatible = "fsl,imx6q-gpio", "fsl,imx31-gpio";
compatible = "fsl,imx6q-gpio", "fsl,imx35-gpio";
reg = <0x020a0000 0x4000>;
interrupts = <0 68 0x04 0 69 0x04>;
gpio-controller;
......@@ -280,7 +280,7 @@
};
gpio3: gpio@020a4000 {
compatible = "fsl,imx6q-gpio", "fsl,imx31-gpio";
compatible = "fsl,imx6q-gpio", "fsl,imx35-gpio";
reg = <0x020a4000 0x4000>;
interrupts = <0 70 0x04 0 71 0x04>;
gpio-controller;
......@@ -290,7 +290,7 @@
};
gpio4: gpio@020a8000 {
compatible = "fsl,imx6q-gpio", "fsl,imx31-gpio";
compatible = "fsl,imx6q-gpio", "fsl,imx35-gpio";
reg = <0x020a8000 0x4000>;
interrupts = <0 72 0x04 0 73 0x04>;
gpio-controller;
......@@ -300,7 +300,7 @@
};
gpio5: gpio@020ac000 {
compatible = "fsl,imx6q-gpio", "fsl,imx31-gpio";
compatible = "fsl,imx6q-gpio", "fsl,imx35-gpio";
reg = <0x020ac000 0x4000>;
interrupts = <0 74 0x04 0 75 0x04>;
gpio-controller;
......@@ -310,7 +310,7 @@
};
gpio6: gpio@020b0000 {
compatible = "fsl,imx6q-gpio", "fsl,imx31-gpio";
compatible = "fsl,imx6q-gpio", "fsl,imx35-gpio";
reg = <0x020b0000 0x4000>;
interrupts = <0 76 0x04 0 77 0x04>;
gpio-controller;
......@@ -320,7 +320,7 @@
};
gpio7: gpio@020b4000 {
compatible = "fsl,imx6q-gpio", "fsl,imx31-gpio";
compatible = "fsl,imx6q-gpio", "fsl,imx35-gpio";
reg = <0x020b4000 0x4000>;
interrupts = <0 78 0x04 0 79 0x04>;
gpio-controller;
......
arch/arm/mach-imx/mm-imx25.c
浏览文件 @ aeb27748
......@@ -90,11 +90,11 @@ static const struct resource imx25_audmux_res[] __initconst = {
void __init imx25_soc_init(void)
{
/* i.mx25 has the i.mx31 type gpio */
mxc_register_gpio("imx31-gpio", 0, MX25_GPIO1_BASE_ADDR, SZ_16K, MX25_INT_GPIO1, 0);
mxc_register_gpio("imx31-gpio", 1, MX25_GPIO2_BASE_ADDR, SZ_16K, MX25_INT_GPIO2, 0);
mxc_register_gpio("imx31-gpio", 2, MX25_GPIO3_BASE_ADDR, SZ_16K, MX25_INT_GPIO3, 0);
mxc_register_gpio("imx31-gpio", 3, MX25_GPIO4_BASE_ADDR, SZ_16K, MX25_INT_GPIO4, 0);
/* i.mx25 has the i.mx35 type gpio */
mxc_register_gpio("imx35-gpio", 0, MX25_GPIO1_BASE_ADDR, SZ_16K, MX25_INT_GPIO1, 0);
mxc_register_gpio("imx35-gpio", 1, MX25_GPIO2_BASE_ADDR, SZ_16K, MX25_INT_GPIO2, 0);
mxc_register_gpio("imx35-gpio", 2, MX25_GPIO3_BASE_ADDR, SZ_16K, MX25_INT_GPIO3, 0);
mxc_register_gpio("imx35-gpio", 3, MX25_GPIO4_BASE_ADDR, SZ_16K, MX25_INT_GPIO4, 0);
pinctrl_provide_dummies();
/* i.mx25 has the i.mx35 type sdma */
......
arch/arm/mach-imx/mm-imx3.c
浏览文件 @ aeb27748
......@@ -273,10 +273,9 @@ void __init imx35_soc_init(void)
imx3_init_l2x0();
/* i.mx35 has the i.mx31 type gpio */
mxc_register_gpio("imx31-gpio", 0, MX35_GPIO1_BASE_ADDR, SZ_16K, MX35_INT_GPIO1, 0);
mxc_register_gpio("imx31-gpio", 1, MX35_GPIO2_BASE_ADDR, SZ_16K, MX35_INT_GPIO2, 0);
mxc_register_gpio("imx31-gpio", 2, MX35_GPIO3_BASE_ADDR, SZ_16K, MX35_INT_GPIO3, 0);
mxc_register_gpio("imx35-gpio", 0, MX35_GPIO1_BASE_ADDR, SZ_16K, MX35_INT_GPIO1, 0);
mxc_register_gpio("imx35-gpio", 1, MX35_GPIO2_BASE_ADDR, SZ_16K, MX35_INT_GPIO2, 0);
mxc_register_gpio("imx35-gpio", 2, MX35_GPIO3_BASE_ADDR, SZ_16K, MX35_INT_GPIO3, 0);
pinctrl_provide_dummies();
if (to_version == 1) {
......
arch/arm/mach-imx/mm-imx5.c
浏览文件 @ aeb27748
......@@ -181,13 +181,13 @@ static const struct resource imx53_audmux_res[] __initconst = {
void __init imx50_soc_init(void)
{
/* i.mx50 has the i.mx31 type gpio */
mxc_register_gpio("imx31-gpio", 0, MX50_GPIO1_BASE_ADDR, SZ_16K, MX50_INT_GPIO1_LOW, MX50_INT_GPIO1_HIGH);
mxc_register_gpio("imx31-gpio", 1, MX50_GPIO2_BASE_ADDR, SZ_16K, MX50_INT_GPIO2_LOW, MX50_INT_GPIO2_HIGH);
mxc_register_gpio("imx31-gpio", 2, MX50_GPIO3_BASE_ADDR, SZ_16K, MX50_INT_GPIO3_LOW, MX50_INT_GPIO3_HIGH);
mxc_register_gpio("imx31-gpio", 3, MX50_GPIO4_BASE_ADDR, SZ_16K, MX50_INT_GPIO4_LOW, MX50_INT_GPIO4_HIGH);
mxc_register_gpio("imx31-gpio", 4, MX50_GPIO5_BASE_ADDR, SZ_16K, MX50_INT_GPIO5_LOW, MX50_INT_GPIO5_HIGH);
mxc_register_gpio("imx31-gpio", 5, MX50_GPIO6_BASE_ADDR, SZ_16K, MX50_INT_GPIO6_LOW, MX50_INT_GPIO6_HIGH);
/* i.mx50 has the i.mx35 type gpio */
mxc_register_gpio("imx35-gpio", 0, MX50_GPIO1_BASE_ADDR, SZ_16K, MX50_INT_GPIO1_LOW, MX50_INT_GPIO1_HIGH);
mxc_register_gpio("imx35-gpio", 1, MX50_GPIO2_BASE_ADDR, SZ_16K, MX50_INT_GPIO2_LOW, MX50_INT_GPIO2_HIGH);
mxc_register_gpio("imx35-gpio", 2, MX50_GPIO3_BASE_ADDR, SZ_16K, MX50_INT_GPIO3_LOW, MX50_INT_GPIO3_HIGH);
mxc_register_gpio("imx35-gpio", 3, MX50_GPIO4_BASE_ADDR, SZ_16K, MX50_INT_GPIO4_LOW, MX50_INT_GPIO4_HIGH);
mxc_register_gpio("imx35-gpio", 4, MX50_GPIO5_BASE_ADDR, SZ_16K, MX50_INT_GPIO5_LOW, MX50_INT_GPIO5_HIGH);
mxc_register_gpio("imx35-gpio", 5, MX50_GPIO6_BASE_ADDR, SZ_16K, MX50_INT_GPIO6_LOW, MX50_INT_GPIO6_HIGH);
/* i.mx50 has the i.mx31 type audmux */
platform_device_register_simple("imx31-audmux", 0, imx50_audmux_res,
......@@ -196,11 +196,11 @@ void __init imx50_soc_init(void)
void __init imx51_soc_init(void)
{
/* i.mx51 has the i.mx31 type gpio */
mxc_register_gpio("imx31-gpio", 0, MX51_GPIO1_BASE_ADDR, SZ_16K, MX51_INT_GPIO1_LOW, MX51_INT_GPIO1_HIGH);
mxc_register_gpio("imx31-gpio", 1, MX51_GPIO2_BASE_ADDR, SZ_16K, MX51_INT_GPIO2_LOW, MX51_INT_GPIO2_HIGH);
mxc_register_gpio("imx31-gpio", 2, MX51_GPIO3_BASE_ADDR, SZ_16K, MX51_INT_GPIO3_LOW, MX51_INT_GPIO3_HIGH);
mxc_register_gpio("imx31-gpio", 3, MX51_GPIO4_BASE_ADDR, SZ_16K, MX51_INT_GPIO4_LOW, MX51_INT_GPIO4_HIGH);
/* i.mx51 has the i.mx35 type gpio */
mxc_register_gpio("imx35-gpio", 0, MX51_GPIO1_BASE_ADDR, SZ_16K, MX51_INT_GPIO1_LOW, MX51_INT_GPIO1_HIGH);
mxc_register_gpio("imx35-gpio", 1, MX51_GPIO2_BASE_ADDR, SZ_16K, MX51_INT_GPIO2_LOW, MX51_INT_GPIO2_HIGH);
mxc_register_gpio("imx35-gpio", 2, MX51_GPIO3_BASE_ADDR, SZ_16K, MX51_INT_GPIO3_LOW, MX51_INT_GPIO3_HIGH);
mxc_register_gpio("imx35-gpio", 3, MX51_GPIO4_BASE_ADDR, SZ_16K, MX51_INT_GPIO4_LOW, MX51_INT_GPIO4_HIGH);
pinctrl_provide_dummies();
......@@ -218,14 +218,14 @@ void __init imx51_soc_init(void)
void __init imx53_soc_init(void)
{
/* i.mx53 has the i.mx31 type gpio */
mxc_register_gpio("imx31-gpio", 0, MX53_GPIO1_BASE_ADDR, SZ_16K, MX53_INT_GPIO1_LOW, MX53_INT_GPIO1_HIGH);
mxc_register_gpio("imx31-gpio", 1, MX53_GPIO2_BASE_ADDR, SZ_16K, MX53_INT_GPIO2_LOW, MX53_INT_GPIO2_HIGH);
mxc_register_gpio("imx31-gpio", 2, MX53_GPIO3_BASE_ADDR, SZ_16K, MX53_INT_GPIO3_LOW, MX53_INT_GPIO3_HIGH);
mxc_register_gpio("imx31-gpio", 3, MX53_GPIO4_BASE_ADDR, SZ_16K, MX53_INT_GPIO4_LOW, MX53_INT_GPIO4_HIGH);
mxc_register_gpio("imx31-gpio", 4, MX53_GPIO5_BASE_ADDR, SZ_16K, MX53_INT_GPIO5_LOW, MX53_INT_GPIO5_HIGH);
mxc_register_gpio("imx31-gpio", 5, MX53_GPIO6_BASE_ADDR, SZ_16K, MX53_INT_GPIO6_LOW, MX53_INT_GPIO6_HIGH);
mxc_register_gpio("imx31-gpio", 6, MX53_GPIO7_BASE_ADDR, SZ_16K, MX53_INT_GPIO7_LOW, MX53_INT_GPIO7_HIGH);
/* i.mx53 has the i.mx35 type gpio */
mxc_register_gpio("imx35-gpio", 0, MX53_GPIO1_BASE_ADDR, SZ_16K, MX53_INT_GPIO1_LOW, MX53_INT_GPIO1_HIGH);
mxc_register_gpio("imx35-gpio", 1, MX53_GPIO2_BASE_ADDR, SZ_16K, MX53_INT_GPIO2_LOW, MX53_INT_GPIO2_HIGH);
mxc_register_gpio("imx35-gpio", 2, MX53_GPIO3_BASE_ADDR, SZ_16K, MX53_INT_GPIO3_LOW, MX53_INT_GPIO3_HIGH);
mxc_register_gpio("imx35-gpio", 3, MX53_GPIO4_BASE_ADDR, SZ_16K, MX53_INT_GPIO4_LOW, MX53_INT_GPIO4_HIGH);
mxc_register_gpio("imx35-gpio", 4, MX53_GPIO5_BASE_ADDR, SZ_16K, MX53_INT_GPIO5_LOW, MX53_INT_GPIO5_HIGH);
mxc_register_gpio("imx35-gpio", 5, MX53_GPIO6_BASE_ADDR, SZ_16K, MX53_INT_GPIO6_LOW, MX53_INT_GPIO6_HIGH);
mxc_register_gpio("imx35-gpio", 6, MX53_GPIO7_BASE_ADDR, SZ_16K, MX53_INT_GPIO7_LOW, MX53_INT_GPIO7_HIGH);
pinctrl_provide_dummies();
/* i.mx53 has the i.mx35 type sdma */
......
drivers/gpio/gpio-mxc.c
浏览文件 @ aeb27748
......@@ -38,7 +38,8 @@
enum mxc_gpio_hwtype {
IMX1_GPIO, /* runs on i.mx1 */
IMX21_GPIO, /* runs on i.mx21 and i.mx27 */
IMX31_GPIO, /* runs on all other i.mx */
IMX31_GPIO, /* runs on i.mx31 */
IMX35_GPIO, /* runs on all other i.mx */
};
/* device type dependent stuff */
......@@ -50,6 +51,7 @@ struct mxc_gpio_hwdata {
unsigned icr2_reg;
unsigned imr_reg;
unsigned isr_reg;
int edge_sel_reg;
unsigned low_level;
unsigned high_level;
unsigned rise_edge;
......@@ -74,6 +76,7 @@ static struct mxc_gpio_hwdata imx1_imx21_gpio_hwdata = {
.icr2_reg = 0x2c,
.imr_reg = 0x30,
.isr_reg = 0x34,
.edge_sel_reg = -EINVAL,
.low_level = 0x03,
.high_level = 0x02,
.rise_edge = 0x00,
......@@ -88,6 +91,22 @@ static struct mxc_gpio_hwdata imx31_gpio_hwdata = {
.icr2_reg = 0x10,
.imr_reg = 0x14,
.isr_reg = 0x18,
.edge_sel_reg = -EINVAL,
.low_level = 0x00,
.high_level = 0x01,
.rise_edge = 0x02,
.fall_edge = 0x03,
};
static struct mxc_gpio_hwdata imx35_gpio_hwdata = {
.dr_reg = 0x00,
.gdir_reg = 0x04,
.psr_reg = 0x08,
.icr1_reg = 0x0c,
.icr2_reg = 0x10,
.imr_reg = 0x14,
.isr_reg = 0x18,
.edge_sel_reg = 0x1c,
.low_level = 0x00,
.high_level = 0x01,
.rise_edge = 0x02,
......@@ -104,12 +123,13 @@ static struct mxc_gpio_hwdata *mxc_gpio_hwdata;
#define GPIO_ICR2 (mxc_gpio_hwdata->icr2_reg)
#define GPIO_IMR (mxc_gpio_hwdata->imr_reg)
#define GPIO_ISR (mxc_gpio_hwdata->isr_reg)
#define GPIO_EDGE_SEL (mxc_gpio_hwdata->edge_sel_reg)
#define GPIO_INT_LOW_LEV (mxc_gpio_hwdata->low_level)
#define GPIO_INT_HIGH_LEV (mxc_gpio_hwdata->high_level)
#define GPIO_INT_RISE_EDGE (mxc_gpio_hwdata->rise_edge)
#define GPIO_INT_FALL_EDGE (mxc_gpio_hwdata->fall_edge)
#define GPIO_INT_NONE 0x4
#define GPIO_INT_BOTH_EDGES 0x4
static struct platform_device_id mxc_gpio_devtype[] = {
{
......@@ -121,6 +141,9 @@ static struct platform_device_id mxc_gpio_devtype[] = {
}, {
.name = "imx31-gpio",
.driver_data = IMX31_GPIO,
}, {
.name = "imx35-gpio",
.driver_data = IMX35_GPIO,
}, {
/* sentinel */
}
......@@ -130,6 +153,7 @@ static const struct of_device_id mxc_gpio_dt_ids[] = {
{ .compatible = "fsl,imx1-gpio", .data = &mxc_gpio_devtype[IMX1_GPIO], },
{ .compatible = "fsl,imx21-gpio", .data = &mxc_gpio_devtype[IMX21_GPIO], },
{ .compatible = "fsl,imx31-gpio", .data = &mxc_gpio_devtype[IMX31_GPIO], },
{ .compatible = "fsl,imx35-gpio", .data = &mxc_gpio_devtype[IMX35_GPIO], },
{ /* sentinel */ }
};
......@@ -160,15 +184,19 @@ static int gpio_set_irq_type(struct irq_data *d, u32 type)
edge = GPIO_INT_FALL_EDGE;
break;
case IRQ_TYPE_EDGE_BOTH:
val = gpio_get_value(gpio);
if (val) {
edge = GPIO_INT_LOW_LEV;
pr_debug("mxc: set GPIO %d to low trigger\n", gpio);
if (GPIO_EDGE_SEL >= 0) {
edge = GPIO_INT_BOTH_EDGES;
} else {
edge = GPIO_INT_HIGH_LEV;
pr_debug("mxc: set GPIO %d to high trigger\n", gpio);
val = gpio_get_value(gpio);
if (val) {
edge = GPIO_INT_LOW_LEV;
pr_debug("mxc: set GPIO %d to low trigger\n", gpio);
} else {
edge = GPIO_INT_HIGH_LEV;
pr_debug("mxc: set GPIO %d to high trigger\n", gpio);
}
port->both_edges |= 1 << (gpio & 31);
}
port->both_edges |= 1 << (gpio & 31);
break;
case IRQ_TYPE_LEVEL_LOW:
edge = GPIO_INT_LOW_LEV;
......@@ -180,10 +208,23 @@ static int gpio_set_irq_type(struct irq_data *d, u32 type)
return -EINVAL;
}
reg += GPIO_ICR1 + ((gpio & 0x10) >> 2); /* lower or upper register */
bit = gpio & 0xf;
val = readl(reg) & ~(0x3 << (bit << 1));
writel(val | (edge << (bit << 1)), reg);
if (GPIO_EDGE_SEL >= 0) {
val = readl(port->base + GPIO_EDGE_SEL);
if (edge == GPIO_INT_BOTH_EDGES)
writel(val | (1 << (gpio & 0x1f)),
port->base + GPIO_EDGE_SEL);
else
writel(val & ~(1 << (gpio & 0x1f)),
port->base + GPIO_EDGE_SEL);
}
if (edge != GPIO_INT_BOTH_EDGES) {
reg += GPIO_ICR1 + ((gpio & 0x10) >> 2); /* lower or upper register */
bit = gpio & 0xf;
val = readl(reg) & ~(0x3 << (bit << 1));
writel(val | (edge << (bit << 1)), reg);
}
writel(1 << (gpio & 0x1f), port->base + GPIO_ISR);
return 0;
......@@ -338,7 +379,9 @@ static void __devinit mxc_gpio_get_hw(struct platform_device *pdev)
return;
}
if (hwtype == IMX31_GPIO)
if (hwtype == IMX35_GPIO)
mxc_gpio_hwdata = &imx35_gpio_hwdata;
else if (hwtype == IMX31_GPIO)
mxc_gpio_hwdata = &imx31_gpio_hwdata;
else
mxc_gpio_hwdata = &imx1_imx21_gpio_hwdata;
......
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