summaryrefslogtreecommitdiffstats
path: root/drivers/gpio/gpio-mxc.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2012-07-26 22:56:38 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2012-07-26 22:56:38 +0200
commitf948ad0787de7b393c325803014fd7d5f1b501b1 (patch)
treed5ac20ec61151809b8e365a137099a3f93562692 /drivers/gpio/gpio-mxc.c
parentMerge branch 'stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetca... (diff)
parentgpio: of_get_named_gpio_flags() return -EPROBE_DEFER if GPIO not yet available (diff)
downloadlinux-f948ad0787de7b393c325803014fd7d5f1b501b1.tar.xz
linux-f948ad0787de7b393c325803014fd7d5f1b501b1.zip
Merge tag 'gpio-for-v3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO changes from Linus Walleij: - New driver for AMD-8111 southbridge GPIOs - New driver for Wolfson Micro Arizona devices - Propagate device tree parse errors - Probe deferral finalizations - all expected calls to GPIO will now hopefully request deferral where apropriate - Misc updates to TCA6424, WM8994, LPC32xx, PCF857x, Samsung MXC, OMAP and PCA953X drivers. Fix up gpio_idx conflicts in drivers/gpio/gpio-mxc.c * tag 'gpio-for-v3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: gpio: of_get_named_gpio_flags() return -EPROBE_DEFER if GPIO not yet available gpiolib: Defer failed gpio requests by default MAINTAINERS: add entry OMAP GPIO driver gpio/pca953x: increase variables size to support 24 bit of data GPIO: PCA953X: Increase size of invert variable to support 24 bit gpio/omap: move bank->dbck initialization to omap_gpio_mod_init() gpio/mxc: use the edge_sel feature if available gpio: propagate of_parse_phandle_with_args errors gpio: samsung: add flags specifier to device-tree binding gpiolib: Add support for Wolfson Microelectronics Arizona class devices gpio: gpio-lpc32xx: Add gpio_to_irq mapping gpio: pcf857x: share 8/16 bit access functions gpio: LPC32xx: Driver cleanup MAINTAINERS: Add Wolfson gpiolib drivers to the Wolfson entry gpiolib: wm8994: Convert to devm_kzalloc() gpiolib: wm8994: Use irq_domain mappings for gpios gpio: add a driver for GPIO pins found on AMD-8111 south bridge chips gpio/tca6424: merge I2C transactions, remove cast gpio/of: fix a typo of comment message
Diffstat (limited to 'drivers/gpio/gpio-mxc.c')
-rw-r--r--drivers/gpio/gpio-mxc.c71
1 files changed, 57 insertions, 14 deletions
diff --git a/drivers/gpio/gpio-mxc.c b/drivers/gpio/gpio-mxc.c
index 04691d3abe60..4db460b6ecf7 100644
--- a/drivers/gpio/gpio-mxc.c
+++ b/drivers/gpio/gpio-mxc.c
@@ -37,7 +37,8 @@
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 */
@@ -49,6 +50,7 @@ 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;
@@ -73,6 +75,7 @@ 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,
@@ -87,6 +90,22 @@ 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,
@@ -103,12 +122,13 @@ 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 */
}
};
@@ -129,6 +152,7 @@ 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_idx;
}
- port->both_edges |= 1 << gpio_idx;
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_idx & 0x10) >> 2); /* ICR1 or ICR2 */
- bit = gpio_idx & 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_idx),
+ port->base + GPIO_EDGE_SEL);
+ else
+ writel(val & ~(1 << gpio_idx),
+ port->base + GPIO_EDGE_SEL);
+ }
+
+ if (edge != GPIO_INT_BOTH_EDGES) {
+ reg += GPIO_ICR1 + ((gpio_idx & 0x10) >> 2); /* lower or upper register */
+ bit = gpio_idx & 0xf;
+ val = readl(reg) & ~(0x3 << (bit << 1));
+ writel(val | (edge << (bit << 1)), reg);
+ }
+
writel(1 << gpio_idx, port->base + GPIO_ISR);
return 0;
@@ -335,7 +376,9 @@ 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;