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-rw-r--r--Documentation/DocBook/gpio.tmpl112
-rw-r--r--arch/arm/Kconfig2
-rw-r--r--arch/arm/mach-ux500/include/mach/gpio.h24
-rw-r--r--drivers/gpio/Kconfig2
-rw-r--r--drivers/gpio/gpio-ab8500.c287
-rw-r--r--drivers/gpio/gpio-nomadik.c110
-rw-r--r--drivers/gpio/gpio-stmpe.c41
-rw-r--r--include/linux/gpio/nomadik.h (renamed from arch/arm/plat-nomadik/include/plat/gpio-nomadik.h)1
-rw-r--r--include/linux/mfd/abx500/ab8500-gpio.h82
9 files changed, 566 insertions, 95 deletions
diff --git a/Documentation/DocBook/gpio.tmpl b/Documentation/DocBook/gpio.tmpl
new file mode 100644
index 00000000000..b69c2770210
--- /dev/null
+++ b/Documentation/DocBook/gpio.tmpl
@@ -0,0 +1,112 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
+ "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd" []>
+
+<book id="GPIO">
+ <bookinfo>
+ <title>GPIO1B</title>
+
+ <authorgroup>
+ <author>
+ <firstname>Alessandro</firstname>
+ <surname>Rubini</surname>
+ <affiliation>
+ <address>
+ <email>rubini@unipv.it</email>
+ </address>
+ </affiliation>
+ </author>
+ <author>
+ <firstname>Prafulla</firstname>
+ <surname>WADASKAR</surname>
+ <affiliation>
+ <address>
+ <email>prafulla.wadaskar@st.com</email>
+ </address>
+ </affiliation>
+ </author>
+ </authorgroup>
+
+ <copyright>
+ <year>2008-2010</year>
+ <holder>ST-Ericsson</holder>
+ </copyright>
+
+ <subjectset>
+ <subject>
+ <subjectterm>Linux standard functions</subjectterm>
+ </subject>
+ </subjectset>
+
+ <legalnotice>
+ <!-- Do NOT remove the legal notice below -->
+
+ <para>
+ This documentation is free software; you can redistribute
+ it and/or modify it under the terms of the GNU General Public
+ License as published by the Free Software Foundation; either
+ version 2 of the License, or (at your option) any later
+ version.
+ </para>
+
+ <para>
+ This program is distributed in the hope that it will be
+ useful, but WITHOUT ANY WARRANTY; without even the implied
+ warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ See the GNU General Public License for more details.
+ </para>
+
+ <para>
+ You should have received a copy of the GNU General Public
+ License along with this program; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ MA 02111-1307 USA
+ </para>
+
+ <para>
+ For more details see the file COPYING in the source
+ distribution of Linux.
+ </para>
+ </legalnotice>
+ </bookinfo>
+
+<toc></toc>
+ <chapter id="intro">
+ <title>Introduction</title>
+ <para>
+ This Documentation describes the API's provided by the GPIO controller Driver.
+ </para>
+ <para>
+ Only the API specific to the Ux500 platform is listed here. For the generic GPIO
+ API, see <filename>Documentation/gpio.txt</filename> in the kernel source tree.
+ </para>
+ </chapter>
+
+ <chapter id="bugs">
+ <title>Known Bugs And Assumptions</title>
+ <para>
+ <variablelist>
+ <varlistentry>
+ <term>None</term>
+ <listitem>
+ <para>
+ None.
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </para>
+ </chapter>
+
+ <chapter id="pubfunctions">
+ <title> Public Interface </title>
+ <para>
+ This Section lists the API's provided by the GPIO controller driver to client drivers.
+ </para>
+ <para>
+ Only the API specific to the Ux500 platform is listed here. For the generic GPIO
+ API, see <filename>Documentation/gpio.txt</filename> in the kernel source tree.
+ </para>
+!Earch/arm/plat-nomadik/gpio.c
+ </chapter>
+</book>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 46ad3ebd89b..9a4b9d580ab 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1583,7 +1583,7 @@ config LOCAL_TIMERS
config ARCH_NR_GPIO
int
default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
- default 355 if ARCH_U8500
+ default 366 if ARCH_U8500
default 0
help
Maximum number of GPIOs in the system.
diff --git a/arch/arm/mach-ux500/include/mach/gpio.h b/arch/arm/mach-ux500/include/mach/gpio.h
index c01ef66537f..e0d903af605 100644
--- a/arch/arm/mach-ux500/include/mach/gpio.h
+++ b/arch/arm/mach-ux500/include/mach/gpio.h
@@ -1,5 +1,29 @@
#ifndef __ASM_ARCH_GPIO_H
#define __ASM_ARCH_GPIO_H
+/*
+ * 288 (#267 is the highest one actually hooked up) onchip GPIOs, plus enough
+ * room for a couple of GPIO expanders.
+ */
+
+#if CONFIG_ARCH_NR_GPIO > 0
+#define ARCH_NR_GPIOS CONFIG_ARCH_NR_GPIO
+#else
+#define ARCH_NR_GPIOS 366
+#endif
+
+#define NOMADIK_NR_GPIO 288
+
+#include <asm-generic/gpio.h>
+
+/* Invoke gpiolibs gpio_chip abstraction */
+#define gpio_get_value __gpio_get_value
+#define gpio_set_value __gpio_set_value
+#define gpio_cansleep __gpio_cansleep
+#define gpio_to_irq __gpio_to_irq
+
+#define MOP500_EGPIO(x) (NOMADIK_NR_GPIO + (x))
+#define MOP500_EGPIO_END MOP500_EGPIO(24)
+#define AB8500_GPIO_BASE MOP500_EGPIO_END
#endif /* __ASM_ARCH_GPIO_H */
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index d0c41188d4e..5e073f74baa 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -479,7 +479,7 @@ config GPIO_JANZ_TTL
config GPIO_AB8500
bool "ST-Ericsson AB8500 Mixed Signal Circuit gpio functions"
- depends on AB8500_CORE && BROKEN
+ depends on AB8500_CORE
help
Select this to enable the AB8500 IC GPIO driver
diff --git a/drivers/gpio/gpio-ab8500.c b/drivers/gpio/gpio-ab8500.c
index 050c05d9189..ef75984486c 100644
--- a/drivers/gpio/gpio-ab8500.c
+++ b/drivers/gpio/gpio-ab8500.c
@@ -18,9 +18,16 @@
#include <linux/gpio.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
-#include <linux/mfd/ab8500.h>
#include <linux/mfd/abx500.h>
-#include <linux/mfd/ab8500/gpio.h>
+#include <linux/mfd/abx500/ab8500-gpio.h>
+
+
+/*
+ * The AB9540 GPIO support is an extended version of the
+ * AB8500 GPIO support. The AB9540 supports an additional
+ * (7th) register so that more GPIO may be configured and
+ * used.
+ */
/*
* GPIO registers offset
@@ -32,6 +39,7 @@
#define AB8500_GPIO_SEL4_REG 0x03
#define AB8500_GPIO_SEL5_REG 0x04
#define AB8500_GPIO_SEL6_REG 0x05
+#define AB9540_GPIO_SEL7_REG 0x06
#define AB8500_GPIO_DIR1_REG 0x10
#define AB8500_GPIO_DIR2_REG 0x11
@@ -39,6 +47,7 @@
#define AB8500_GPIO_DIR4_REG 0x13
#define AB8500_GPIO_DIR5_REG 0x14
#define AB8500_GPIO_DIR6_REG 0x15
+#define AB9540_GPIO_DIR7_REG 0x16
#define AB8500_GPIO_OUT1_REG 0x20
#define AB8500_GPIO_OUT2_REG 0x21
@@ -46,6 +55,7 @@
#define AB8500_GPIO_OUT4_REG 0x23
#define AB8500_GPIO_OUT5_REG 0x24
#define AB8500_GPIO_OUT6_REG 0x25
+#define AB9540_GPIO_OUT7_REG 0x26
#define AB8500_GPIO_PUD1_REG 0x30
#define AB8500_GPIO_PUD2_REG 0x31
@@ -53,6 +63,7 @@
#define AB8500_GPIO_PUD4_REG 0x33
#define AB8500_GPIO_PUD5_REG 0x34
#define AB8500_GPIO_PUD6_REG 0x35
+#define AB9540_GPIO_PUD7_REG 0x36
#define AB8500_GPIO_IN1_REG 0x40
#define AB8500_GPIO_IN2_REG 0x41
@@ -60,9 +71,13 @@
#define AB8500_GPIO_IN4_REG 0x43
#define AB8500_GPIO_IN5_REG 0x44
#define AB8500_GPIO_IN6_REG 0x45
-#define AB8500_GPIO_ALTFUN_REG 0x45
-#define ALTFUN_REG_INDEX 6
+#define AB9540_GPIO_IN7_REG 0x46
+#define AB8500_GPIO_ALTFUN_REG 0x50
+#define AB8500_ALTFUN_REG_INDEX 6
+#define AB9540_ALTFUN_REG_INDEX 7
#define AB8500_NUM_GPIO 42
+#define AB9540_NUM_GPIO 54
+#define AB8505_NUM_GPIO 53
#define AB8500_NUM_VIR_GPIO_IRQ 16
enum ab8500_gpio_action {
@@ -73,6 +88,11 @@ enum ab8500_gpio_action {
UNMASK
};
+struct ab8500_gpio_irq_cluster {
+ int start;
+ int end;
+};
+
struct ab8500_gpio {
struct gpio_chip chip;
struct ab8500 *parent;
@@ -82,7 +102,50 @@ struct ab8500_gpio {
enum ab8500_gpio_action irq_action;
u16 rising;
u16 falling;
+ struct ab8500_gpio_irq_cluster *irq_cluster;
+ int irq_cluster_size;
+};
+
+/*
+ * Only some GPIOs are interrupt capable, and they are
+ * organized in discontiguous clusters:
+ *
+ * GPIO6 to GPIO13
+ * GPIO24 and GPIO25
+ * GPIO36 to GPIO41
+ * GPIO50 to GPIO54 (AB9540 only)
+ */
+static struct ab8500_gpio_irq_cluster ab8500_irq_clusters[] = {
+ {.start = 5, .end = 12}, /* GPIO numbers start from 1 */
+ {.start = 23, .end = 24},
+ {.start = 35, .end = 40},
+};
+
+static struct ab8500_gpio_irq_cluster ab9540_irq_clusters[] = {
+ {.start = 5, .end = 12}, /* GPIO numbers start from 1 */
+ {.start = 23, .end = 24},
+ {.start = 35, .end = 40},
+ {.start = 49, .end = 53},
+};
+
+/*
+ * For AB8505 Only some GPIOs are interrupt capable, and they are
+ * organized in discontiguous clusters:
+ *
+ * GPIO10 to GPIO11
+ * GPIO13
+ * GPIO40 and GPIO41
+ * GPIO50
+ * GPIO52 to GPIO53
+ */
+static struct ab8500_gpio_irq_cluster ab8505_irq_clusters[] = {
+ {.start = 9, .end = 10}, /* GPIO numbers start from 1 */
+ {.start = 12, .end = 12},
+ {.start = 39, .end = 40},
+ {.start = 49, .end = 49},
+ {.start = 51, .end = 52},
};
+
/**
* to_ab8500_gpio() - get the pointer to ab8500_gpio
* @chip: Member of the structure ab8500_gpio
@@ -115,7 +178,7 @@ static int ab8500_gpio_get(struct gpio_chip *chip, unsigned offset)
{
struct ab8500_gpio *ab8500_gpio = to_ab8500_gpio(chip);
u8 mask = 1 << (offset % 8);
- u8 reg = AB8500_GPIO_OUT1_REG + (offset / 8);
+ u8 reg = AB8500_GPIO_IN1_REG + (offset / 8);
int ret;
u8 data;
ret = abx500_get_register_interruptible(ab8500_gpio->dev, AB8500_MISC,
@@ -132,7 +195,7 @@ static void ab8500_gpio_set(struct gpio_chip *chip, unsigned offset, int val)
struct ab8500_gpio *ab8500_gpio = to_ab8500_gpio(chip);
int ret;
/* Write the data */
- ret = ab8500_gpio_set_bits(chip, AB8500_GPIO_OUT1_REG, offset, 1);
+ ret = ab8500_gpio_set_bits(chip, AB8500_GPIO_OUT1_REG, offset, val);
if (ret < 0)
dev_err(ab8500_gpio->dev, "%s write failed\n", __func__);
}
@@ -162,28 +225,13 @@ static int ab8500_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
static int ab8500_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
{
- /*
- * Only some GPIOs are interrupt capable, and they are
- * organized in discontiguous clusters:
- *
- * GPIO6 to GPIO13
- * GPIO24 and GPIO25
- * GPIO36 to GPIO41
- */
- static struct ab8500_gpio_irq_cluster {
- int start;
- int end;
- } clusters[] = {
- {.start = 6, .end = 13},
- {.start = 24, .end = 25},
- {.start = 36, .end = 41},
- };
struct ab8500_gpio *ab8500_gpio = to_ab8500_gpio(chip);
int base = ab8500_gpio->irq_base;
int i;
- for (i = 0; i < ARRAY_SIZE(clusters); i++) {
- struct ab8500_gpio_irq_cluster *cluster = &clusters[i];
+ for (i = 0; i < ab8500_gpio->irq_cluster_size; i++) {
+ struct ab8500_gpio_irq_cluster *cluster =
+ &ab8500_gpio->irq_cluster[i];
if (offset >= cluster->start && offset <= cluster->end)
return base + offset - cluster->start;
@@ -207,7 +255,7 @@ static struct gpio_chip ab8500gpio_chip = {
static unsigned int irq_to_rising(unsigned int irq)
{
- struct ab8500_gpio *ab8500_gpio = get_irq_chip_data(irq);
+ struct ab8500_gpio *ab8500_gpio = irq_get_chip_data(irq);
int offset = irq - ab8500_gpio->irq_base;
int new_irq = offset + AB8500_INT_GPIO6R
+ ab8500_gpio->parent->irq_base;
@@ -216,7 +264,7 @@ static unsigned int irq_to_rising(unsigned int irq)
static unsigned int irq_to_falling(unsigned int irq)
{
- struct ab8500_gpio *ab8500_gpio = get_irq_chip_data(irq);
+ struct ab8500_gpio *ab8500_gpio = irq_get_chip_data(irq);
int offset = irq - ab8500_gpio->irq_base;
int new_irq = offset + AB8500_INT_GPIO6F
+ ab8500_gpio->parent->irq_base;
@@ -261,15 +309,16 @@ static irqreturn_t handle_falling(int irq, void *dev)
return IRQ_HANDLED;
}
-static void ab8500_gpio_irq_lock(unsigned int irq)
+static void ab8500_gpio_irq_lock(struct irq_data *data)
{
- struct ab8500_gpio *ab8500_gpio = get_irq_chip_data(irq);
+ struct ab8500_gpio *ab8500_gpio = irq_data_get_irq_chip_data(data);
mutex_lock(&ab8500_gpio->lock);
}
-static void ab8500_gpio_irq_sync_unlock(unsigned int irq)
+static void ab8500_gpio_irq_sync_unlock(struct irq_data *data)
{
- struct ab8500_gpio *ab8500_gpio = get_irq_chip_data(irq);
+ struct ab8500_gpio *ab8500_gpio = irq_data_get_irq_chip_data(data);
+ unsigned int irq = data->irq;
int offset = irq - ab8500_gpio->irq_base;
bool rising = ab8500_gpio->rising & BIT(offset);
bool falling = ab8500_gpio->falling & BIT(offset);
@@ -280,12 +329,12 @@ static void ab8500_gpio_irq_sync_unlock(unsigned int irq)
if (rising)
ret = request_threaded_irq(irq_to_rising(irq),
NULL, handle_rising,
- IRQF_TRIGGER_RISING,
+ IRQF_TRIGGER_RISING | IRQF_NO_SUSPEND,
"ab8500-gpio-r", ab8500_gpio);
if (falling)
ret = request_threaded_irq(irq_to_falling(irq),
NULL, handle_falling,
- IRQF_TRIGGER_FALLING,
+ IRQF_TRIGGER_FALLING | IRQF_NO_SUSPEND,
"ab8500-gpio-f", ab8500_gpio);
break;
case SHUTDOWN:
@@ -316,21 +365,22 @@ static void ab8500_gpio_irq_sync_unlock(unsigned int irq)
}
-static void ab8500_gpio_irq_mask(unsigned int irq)
+static void ab8500_gpio_irq_mask(struct irq_data *data)
{
- struct ab8500_gpio *ab8500_gpio = get_irq_chip_data(irq);
+ struct ab8500_gpio *ab8500_gpio = irq_data_get_irq_chip_data(data);
ab8500_gpio->irq_action = MASK;
}
-static void ab8500_gpio_irq_unmask(unsigned int irq)
+static void ab8500_gpio_irq_unmask(struct irq_data *data)
{
- struct ab8500_gpio *ab8500_gpio = get_irq_chip_data(irq);
+ struct ab8500_gpio *ab8500_gpio = irq_data_get_irq_chip_data(data);
ab8500_gpio->irq_action = UNMASK;
}
-static int ab8500_gpio_irq_set_type(unsigned int irq, unsigned int type)
+static int ab8500_gpio_irq_set_type(struct irq_data *data, unsigned int type)
{
- struct ab8500_gpio *ab8500_gpio = get_irq_chip_data(irq);
+ struct ab8500_gpio *ab8500_gpio = irq_data_get_irq_chip_data(data);
+ unsigned int irq = data->irq;
int offset = irq - ab8500_gpio->irq_base;
if (type == IRQ_TYPE_EDGE_BOTH) {
@@ -344,28 +394,28 @@ static int ab8500_gpio_irq_set_type(unsigned int irq, unsigned int type)
return 0;
}
-unsigned int ab8500_gpio_irq_startup(unsigned int irq)
+unsigned int ab8500_gpio_irq_startup(struct irq_data *data)
{
- struct ab8500_gpio *ab8500_gpio = get_irq_chip_data(irq);
+ struct ab8500_gpio *ab8500_gpio = irq_data_get_irq_chip_data(data);
ab8500_gpio->irq_action = STARTUP;
return 0;
}
-void ab8500_gpio_irq_shutdown(unsigned int irq)
+void ab8500_gpio_irq_shutdown(struct irq_data *data)
{
- struct ab8500_gpio *ab8500_gpio = get_irq_chip_data(irq);
+ struct ab8500_gpio *ab8500_gpio = irq_data_get_irq_chip_data(data);
ab8500_gpio->irq_action = SHUTDOWN;
}
static struct irq_chip ab8500_gpio_irq_chip = {
.name = "ab8500-gpio",
- .startup = ab8500_gpio_irq_startup,
- .shutdown = ab8500_gpio_irq_shutdown,
- .bus_lock = ab8500_gpio_irq_lock,
- .bus_sync_unlock = ab8500_gpio_irq_sync_unlock,
- .mask = ab8500_gpio_irq_mask,
- .unmask = ab8500_gpio_irq_unmask,
- .set_type = ab8500_gpio_irq_set_type,
+ .irq_startup = ab8500_gpio_irq_startup,
+ .irq_shutdown = ab8500_gpio_irq_shutdown,
+ .irq_bus_lock = ab8500_gpio_irq_lock,
+ .irq_bus_sync_unlock = ab8500_gpio_irq_sync_unlock,
+ .irq_mask = ab8500_gpio_irq_mask,
+ .irq_unmask = ab8500_gpio_irq_unmask,
+ .irq_set_type = ab8500_gpio_irq_set_type,
};
static int ab8500_gpio_irq_init(struct ab8500_gpio *ab8500_gpio)
@@ -374,14 +424,14 @@ static int ab8500_gpio_irq_init(struct ab8500_gpio *ab8500_gpio)
int irq;
for (irq = base; irq < base + AB8500_NUM_VIR_GPIO_IRQ ; irq++) {
- set_irq_chip_data(irq, ab8500_gpio);
- set_irq_chip_and_handler(irq, &ab8500_gpio_irq_chip,
+ irq_set_chip_data(irq, ab8500_gpio);
+ irq_set_chip_and_handler(irq, &ab8500_gpio_irq_chip,
handle_simple_irq);
- set_irq_nested_thread(irq, 1);
+ irq_set_nested_thread(irq, 1);
#ifdef CONFIG_ARM
set_irq_flags(irq, IRQF_VALID);
#else
- set_irq_noprobe(irq);
+ irq_set_noprobe(irq);
#endif
}
@@ -397,19 +447,22 @@ static void ab8500_gpio_irq_remove(struct ab8500_gpio *ab8500_gpio)
#ifdef CONFIG_ARM
set_irq_flags(irq, 0);
#endif
- set_irq_chip_and_handler(irq, NULL, NULL);
- set_irq_chip_data(irq, NULL);
+ irq_set_chip_and_handler(irq, NULL, NULL);
+ irq_set_chip_data(irq, NULL);
}
}
static int __devinit ab8500_gpio_probe(struct platform_device *pdev)
{
+ struct ab8500 *parent = dev_get_drvdata(pdev->dev.parent);
struct ab8500_platform_data *ab8500_pdata =
dev_get_platdata(pdev->dev.parent);
struct ab8500_gpio_platform_data *pdata;
struct ab8500_gpio *ab8500_gpio;
int ret;
int i;
+ int last_gpio_sel_reg;
+ int altfun_reg_index;
pdata = ab8500_pdata->gpio;
if (!pdata) {
@@ -425,10 +478,36 @@ static int __devinit ab8500_gpio_probe(struct platform_device *pdev)
ab8500_gpio->dev = &pdev->dev;
ab8500_gpio->parent = dev_get_drvdata(pdev->dev.parent);
ab8500_gpio->chip = ab8500gpio_chip;
- ab8500_gpio->chip.ngpio = AB8500_NUM_GPIO;
ab8500_gpio->chip.dev = &pdev->dev;
ab8500_gpio->chip.base = pdata->gpio_base;
ab8500_gpio->irq_base = pdata->irq_base;
+
+ /* Configure GPIO Settings for specific AB devices */
+ if (cpu_is_u9540()) {
+ ab8500_gpio->chip.ngpio = AB9540_NUM_GPIO;
+ ab8500_gpio->irq_cluster = ab9540_irq_clusters;
+ ab8500_gpio->irq_cluster_size =
+ ARRAY_SIZE(ab9540_irq_clusters);
+ last_gpio_sel_reg = AB9540_GPIO_SEL7_REG;
+ altfun_reg_index = AB9540_ALTFUN_REG_INDEX;
+ } else {
+ if (is_ab8505(parent)) {
+ ab8500_gpio->chip.ngpio = AB8505_NUM_GPIO;
+ ab8500_gpio->irq_cluster = ab8505_irq_clusters;
+ ab8500_gpio->irq_cluster_size =
+ ARRAY_SIZE(ab8505_irq_clusters);
+ last_gpio_sel_reg = AB9540_GPIO_SEL7_REG;
+ altfun_reg_index = AB9540_ALTFUN_REG_INDEX;
+ } else {
+ ab8500_gpio->chip.ngpio = AB8500_NUM_GPIO;
+ ab8500_gpio->irq_cluster = ab8500_irq_clusters;
+ ab8500_gpio->irq_cluster_size =
+ ARRAY_SIZE(ab8500_irq_clusters);
+ last_gpio_sel_reg = AB8500_GPIO_SEL6_REG;
+ altfun_reg_index = AB8500_ALTFUN_REG_INDEX;
+ }
+ }
+
/* initialize the lock */
mutex_init(&ab8500_gpio->lock);
/*
@@ -437,16 +516,28 @@ static int __devinit ab8500_gpio_probe(struct platform_device *pdev)
* These values are for selecting the PINs as
* GPIO or alternate function
*/
- for (i = AB8500_GPIO_SEL1_REG; i <= AB8500_GPIO_SEL6_REG; i++) {
+ for (i = AB8500_GPIO_SEL1_REG; i <= last_gpio_sel_reg; i++) {
ret = abx500_set_register_interruptible(ab8500_gpio->dev,
AB8500_MISC, i,
pdata->config_reg[i]);
if (ret < 0)
goto out_free;
+
+ ret = abx500_set_register_interruptible(ab8500_gpio->dev,
+ AB8500_MISC, i + AB8500_GPIO_DIR1_REG,
+ pdata->config_direction[i]);
+ if (ret < 0)
+ goto out_free;
+
+ ret = abx500_set_register_interruptible(ab8500_gpio->dev,
+ AB8500_MISC, i + AB8500_GPIO_PUD1_REG,
+ pdata->config_pullups[i]);
+ if (ret < 0)
+ goto out_free;
}
ret = abx500_set_register_interruptible(ab8500_gpio->dev, AB8500_MISC,
AB8500_GPIO_ALTFUN_REG,
- pdata->config_reg[ALTFUN_REG_INDEX]);
+ pdata->config_reg[altfun_reg_index]);
if (ret < 0)
goto out_free;
@@ -493,6 +584,86 @@ static int __devexit ab8500_gpio_remove(struct platform_device *pdev)
return 0;
}
+int ab8500_config_pulldown(struct device *dev,
+ enum ab8500_pin gpio, bool enable)
+{
+ u8 offset = gpio - AB8500_PIN_GPIO1;
+ u8 pos = offset % 8;
+ u8 val = enable ? 0 : 1;
+ u8 reg = AB8500_GPIO_PUD1_REG + (offset / 8);
+ int ret;
+
+ ret = abx500_mask_and_set_register_interruptible(dev,
+ AB8500_MISC, reg, 1 << pos, val << pos);
+ if (ret < 0)
+ dev_err(dev, "%s write failed\n", __func__);
+ return ret;
+}
+EXPORT_SYMBOL(ab8500_config_pulldown);
+
+/*
+ * ab8500_gpio_config_select()
+ *
+ * Configure functionality of pin, either specific use or GPIO.
+ * @dev: device pointer
+ * @gpio: gpio number
+ * @gpio_select: true if the pin should be used as GPIO
+ */
+int ab8500_gpio_config_select(struct device *dev,
+ enum ab8500_pin gpio, bool gpio_select)
+{
+ u8 offset = gpio - AB8500_PIN_GPIO1;
+ u8 reg = AB8500_GPIO_SEL1_REG + (offset / 8);
+ u8 pos = offset % 8;
+ u8 val = gpio_select ? 1 : 0;
+ int ret;
+
+ ret = abx500_mask_and_set_register_interruptible(dev,
+ AB8500_MISC, reg, 1 << pos, val << pos);
+ if (ret < 0)
+ dev_err(dev, "%s write failed\n", __func__);
+
+ dev_vdbg(dev, "%s (bank, addr, mask, value): 0x%x, 0x%x, 0x%x, 0x%x\n",
+ __func__, AB8500_MISC, reg, 1 << pos, val << pos);
+
+ return ret;
+}
+
+/*
+ * ab8500_gpio_config_get_select()
+ *
+ * Read currently configured functionality, either specific use or GPIO.
+ * @dev: device pointer
+ * @gpio: gpio number
+ * @gpio_select: pointer to pin selection status
+ */
+int ab8500_gpio_config_get_select(struct device *dev,
+ enum ab8500_pin gpio, bool *gpio_select)
+{
+ u8 offset = gpio - AB8500_PIN_GPIO1;
+ u8 reg = AB8500_GPIO_SEL1_REG + (offset / 8);
+ u8 pos = offset % 8;
+ u8 val;
+ int ret;
+
+ ret = abx500_get_register_interruptible(dev,
+ AB8500_MISC, reg, &val);
+ if (ret < 0) {
+ dev_err(dev, "%s read failed\n", __func__);
+ return ret;
+ }
+
+ if (val & (1 << pos))
+ *gpio_select = true;
+ else
+ *gpio_select = false;
+
+ dev_vdbg(dev, "%s (bank, addr, mask, value): 0x%x, 0x%x, 0x%x, 0x%x\n",
+ __func__, AB8500_MISC, reg, 1 << pos, val);
+
+ return 0;
+}
+
static struct platform_driver ab8500_gpio_driver = {
.driver = {
.name = "ab8500-gpio",
diff --git a/drivers/gpio/gpio-nomadik.c b/drivers/gpio/gpio-nomadik.c
index d350c8d7d2d..c101825235a 100644
--- a/drivers/gpio/gpio-nomadik.c
+++ b/drivers/gpio/gpio-nomadik.c
@@ -23,11 +23,11 @@
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/slab.h>
+#include <linux/gpio/nomadik.h>
#include <asm/mach/irq.h>
#include <plat/pincfg.h>
-#include <plat/gpio-nomadik.h>
#include <mach/hardware.h>
#include <asm/gpio.h>
@@ -58,8 +58,11 @@ struct nmk_gpio_chip {
u32 real_wake;
u32 rwimsc;
u32 fwimsc;
+ u32 rimsc;
+ u32 fimsc;
u32 slpm;
u32 pull_up;
+ u32 lowemi;
};
static struct nmk_gpio_chip *
@@ -124,6 +127,24 @@ static void __nmk_gpio_set_pull(struct nmk_gpio_chip *nmk_chip,
}
}
+static void __nmk_gpio_set_lowemi(struct nmk_gpio_chip *nmk_chip,
+ unsigned offset, bool lowemi)
+{
+ u32 bit = BIT(offset);
+ bool enabled = nmk_chip->lowemi & bit;
+
+ if (lowemi == enabled)
+ return;
+
+ if (lowemi)
+ nmk_chip->lowemi |= bit;
+ else
+ nmk_chip->lowemi &= ~bit;
+
+ writel_relaxed(nmk_chip->lowemi,
+ nmk_chip->addr + NMK_GPIO_LOWEMI);
+}
+
static void __nmk_gpio_make_input(struct nmk_gpio_chip *nmk_chip,
unsigned offset)
{
@@ -150,8 +171,8 @@ static void __nmk_gpio_set_mode_safe(struct nmk_gpio_chip *nmk_chip,
unsigned offset, int gpio_mode,
bool glitch)
{
- u32 rwimsc = readl(nmk_chip->addr + NMK_GPIO_RWIMSC);
- u32 fwimsc = readl(nmk_chip->addr + NMK_GPIO_FWIMSC);
+ u32 rwimsc = nmk_chip->rwimsc;
+ u32 fwimsc = nmk_chip->fwimsc;
if (glitch && nmk_chip->set_ioforce) {
u32 bit = BIT(offset);
@@ -173,6 +194,36 @@ static void __nmk_gpio_set_mode_safe(struct nmk_gpio_chip *nmk_chip,
}
}
+static void
+nmk_gpio_disable_lazy_irq(struct nmk_gpio_chip *nmk_chip, unsigned offset)
+{
+ u32 falling = nmk_chip->fimsc & BIT(offset);
+ u32 rising = nmk_chip->rimsc & BIT(offset);
+ int gpio = nmk_chip->chip.base + offset;
+ int irq = NOMADIK_GPIO_TO_IRQ(gpio);
+ struct irq_data *d = irq_get_irq_data(irq);
+
+ if (!rising && !falling)
+ return;
+
+ if (!d || !irqd_irq_disabled(d))
+ return;
+
+ if (rising) {
+ nmk_chip->rimsc &= ~BIT(offset);
+ writel_relaxed(nmk_chip->rimsc,
+ nmk_chip->addr + NMK_GPIO_RIMSC);
+ }
+
+ if (falling) {
+ nmk_chip->fimsc &= ~BIT(offset);
+ writel_relaxed(nmk_chip->fimsc,
+ nmk_chip->addr + NMK_GPIO_FIMSC);
+ }
+
+ dev_dbg(nmk_chip->chip.dev, "%d: clearing interrupt mask\n", gpio);
+}
+
static void __nmk_config_pin(struct nmk_gpio_chip *nmk_chip, unsigned offset,
pin_cfg_t cfg, bool sleep, unsigned int *slpmregs)
{
@@ -238,6 +289,17 @@ static void __nmk_config_pin(struct nmk_gpio_chip *nmk_chip, unsigned offset,
__nmk_gpio_set_pull(nmk_chip, offset, pull);
}
+ __nmk_gpio_set_lowemi(nmk_chip, offset, PIN_LOWEMI(cfg));
+
+ /*
+ * If the pin is switching to altfunc, and there was an interrupt
+ * installed on it which has been lazy disabled, actually mask the
+ * interrupt to prevent spurious interrupts that would occur while the
+ * pin is under control of the peripheral. Only SKE does this.
+ */
+ if (af != NMK_GPIO_ALT_GPIO)
+ nmk_gpio_disable_lazy_irq(nmk_chip, offset);
+
/*
* If we've backed up the SLPM registers (glitch workaround), modify
* the backups since they will be restored.
@@ -556,27 +618,38 @@ static void __nmk_gpio_irq_modify(struct nmk_gpio_chip *nmk_chip,
int gpio, enum nmk_gpio_irq_type which,
bool enable)
{
- u32 rimsc = which == WAKE ? NMK_GPIO_RWIMSC : NMK_GPIO_RIMSC;
- u32 fimsc = which == WAKE ? NMK_GPIO_FWIMSC : NMK_GPIO_FIMSC;
u32 bitmask = nmk_gpio_get_bitmask(gpio);
- u32 reg;
+ u32 *rimscval;
+ u32 *fimscval;
+ u32 rimscreg;
+ u32 fimscreg;
+
+ if (which == NORMAL) {
+ rimscreg = NMK_GPIO_RIMSC;
+ fimscreg = NMK_GPIO_FIMSC;
+ rimscval = &nmk_chip->rimsc;
+ fimscval = &nmk_chip->fimsc;
+ } else {
+ rimscreg = NMK_GPIO_RWIMSC;
+ fimscreg = NMK_GPIO_FWIMSC;
+ rimscval = &nmk_chip->rwimsc;
+ fimscval = &nmk_chip->fwimsc;
+ }
/* we must individually set/clear the two edges */
if (nmk_chip->edge_rising & bitmask) {
- reg = readl(nmk_chip->addr + rimsc);
if (enable)
- reg |= bitmask;
+ *rimscval |= bitmask;
else
- reg &= ~bitmask;
- writel(reg, nmk_chip->addr + rimsc);
+ *rimscval &= ~bitmask;
+ writel(*rimscval, nmk_chip->addr + rimscreg);
}
if (nmk_chip->edge_falling & bitmask) {
- reg = readl(nmk_chip->addr + fimsc);
if (enable)
- reg |= bitmask;
+ *fimscval |= bitmask;
else
- reg &= ~bitmask;
- writel(reg, nmk_chip->addr + fimsc);
+ *fimscval &= ~bitmask;
+ writel(*fimscval, nmk_chip->addr + fimscreg);
}
}
@@ -1008,9 +1081,6 @@ void nmk_gpio_wakeups_suspend(void)
clk_enable(chip->clk);
- chip->rwimsc = readl(chip->addr + NMK_GPIO_RWIMSC);
- chip->fwimsc = readl(chip->addr + NMK_GPIO_FWIMSC);
-
writel(chip->rwimsc & chip->real_wake,
chip->addr + NMK_GPIO_RWIMSC);
writel(chip->fwimsc & chip->real_wake,
@@ -1123,7 +1193,7 @@ static int __devinit nmk_gpio_probe(struct platform_device *dev)
*/
nmk_chip->bank = dev->id;
nmk_chip->clk = clk;
- nmk_chip->addr = io_p2v(res->start);
+ nmk_chip->addr = __io(IO_ADDRESS(res->start));
nmk_chip->chip = nmk_gpio_template;
nmk_chip->parent_irq = irq;
nmk_chip->secondary_parent_irq = secondary_irq;
@@ -1139,6 +1209,10 @@ static int __devinit nmk_gpio_probe(struct platform_device *dev)
chip->dev = &dev->dev;
chip->owner = THIS_MODULE;
+ clk_enable(nmk_chip->clk);
+ nmk_chip->lowemi = readl_relaxed(nmk_chip->addr + NMK_GPIO_LOWEMI);
+ clk_disable(nmk_chip->clk);
+
ret = gpiochip_add(&nmk_chip->chip);
if (ret)
goto out_free;
diff --git a/drivers/gpio/gpio-stmpe.c b/drivers/gpio/gpio-stmpe.c
index 87a68a896ab..094c5c4fd7f 100644
--- a/drivers/gpio/gpio-stmpe.c
+++ b/drivers/gpio/gpio-stmpe.c
@@ -307,13 +307,11 @@ static int __devinit stmpe_gpio_probe(struct platform_device *pdev)
struct stmpe_gpio_platform_data *pdata;
struct stmpe_gpio *stmpe_gpio;
int ret;
- int irq;
+ int irq = 0;
pdata = stmpe->pdata->gpio;
irq = platform_get_irq(pdev, 0);
- if (irq < 0)
- return irq;
stmpe_gpio = kzalloc(sizeof(struct stmpe_gpio), GFP_KERNEL);
if (!stmpe_gpio)
@@ -330,21 +328,28 @@ static int __devinit stmpe_gpio_probe(struct platform_device *pdev)
stmpe_gpio->chip.dev = &pdev->dev;
stmpe_gpio->chip.base = pdata ? pdata->gpio_base : -1;
- stmpe_gpio->irq_base = stmpe->irq_base + STMPE_INT_GPIO(0);
+ if (irq >= 0)
+ stmpe_gpio->irq_base = stmpe->irq_base + STMPE_INT_GPIO(0);
+ else
+ dev_info(&pdev->dev,
+ "device configured in no-irq mode; "
+ "irqs are not available\n");
ret = stmpe_enable(stmpe, STMPE_BLOCK_GPIO);
if (ret)
goto out_free;
- ret = stmpe_gpio_irq_init(stmpe_gpio);
- if (ret)
- goto out_disable;
+ if (irq >= 0) {
+ ret = stmpe_gpio_irq_init(stmpe_gpio);
+ if (ret)
+ goto out_disable;
- ret = request_threaded_irq(irq, NULL, stmpe_gpio_irq, IRQF_ONESHOT,
- "stmpe-gpio", stmpe_gpio);
- if (ret) {
- dev_err(&pdev->dev, "unable to get irq: %d\n", ret);
- goto out_removeirq;
+ ret = request_threaded_irq(irq, NULL, stmpe_gpio_irq,
+ IRQF_ONESHOT, "stmpe-gpio", stmpe_gpio);
+ if (ret) {
+ dev_err(&pdev->dev, "unable to get irq: %d\n", ret);
+ goto out_removeirq;
+ }
}
ret = gpiochip_add(&stmpe_gpio->chip);
@@ -361,9 +366,11 @@ static int __devinit stmpe_gpio_probe(struct platform_device *pdev)
return 0;
out_freeirq:
- free_irq(irq, stmpe_gpio);
+ if (irq >= 0)
+ free_irq(irq, stmpe_gpio);
out_removeirq:
- stmpe_gpio_irq_remove(stmpe_gpio);
+ if (irq >= 0)
+ stmpe_gpio_irq_remove(stmpe_gpio);
out_disable:
stmpe_disable(stmpe, STMPE_BLOCK_GPIO);
out_free:
@@ -391,8 +398,10 @@ static int __devexit stmpe_gpio_remove(struct platform_device *pdev)
stmpe_disable(stmpe, STMPE_BLOCK_GPIO);
- free_irq(irq, stmpe_gpio);
- stmpe_gpio_irq_remove(stmpe_gpio);
+ if (irq >= 0) {
+ free_irq(irq, stmpe_gpio);
+ stmpe_gpio_irq_remove(stmpe_gpio);
+ }
platform_set_drvdata(pdev, NULL);
kfree(stmpe_gpio);
diff --git a/arch/arm/plat-nomadik/include/plat/gpio-nomadik.h b/include/linux/gpio/nomadik.h
index 9605bf227df..3e8b7f16fb7 100644
--- a/arch/arm/plat-nomadik/include/plat/gpio-nomadik.h
+++ b/include/linux/gpio/nomadik.h
@@ -29,6 +29,7 @@
#define NMK_GPIO_SLPC 0x1c
#define NMK_GPIO_AFSLA 0x20
#define NMK_GPIO_AFSLB 0x24
+#define NMK_GPIO_LOWEMI 0x28
#define NMK_GPIO_RIMSC 0x40
#define NMK_GPIO_FIMSC 0x44
diff --git a/include/linux/mfd/abx500/ab8500-gpio.h b/include/linux/mfd/abx500/ab8500-gpio.h
index 488a8c920a2..67ac32c1dcb 100644
--- a/include/linux/mfd/abx500/ab8500-gpio.h
+++ b/include/linux/mfd/abx500/ab8500-gpio.h
@@ -8,14 +8,94 @@
#ifndef _AB8500_GPIO_H
#define _AB8500_GPIO_H
+#include <mach/gpio.h>
+
/*
* Platform data to register a block: only the initial gpio/irq number.
+ * Array sizes are large enough to contain all AB8500 and AB9540 GPIO
+ * registers.
*/
struct ab8500_gpio_platform_data {
int gpio_base;
u32 irq_base;
- u8 config_reg[7];
+ u8 config_reg[8];
+ u8 config_direction[7];
+ u8 config_pullups[7];
+};
+
+enum ab8500_pin {
+ AB8500_PIN_GPIO1 = AB8500_GPIO_BASE,
+ AB8500_PIN_GPIO2,
+ AB8500_PIN_GPIO3,
+ AB8500_PIN_GPIO4,
+ AB8500_PIN_GPIO5,
+ AB8500_PIN_GPIO6,
+ AB8500_PIN_GPIO7,
+ AB8500_PIN_GPIO8,
+ AB8500_PIN_GPIO9,
+ AB8500_PIN_GPIO10,
+ AB8500_PIN_GPIO11,
+ AB8500_PIN_GPIO12,
+ AB8500_PIN_GPIO13,
+ AB8500_PIN_GPIO14,
+ AB8500_PIN_GPIO15,
+ AB8500_PIN_GPIO16,
+ AB8500_PIN_GPIO17,
+ AB8500_PIN_GPIO18,
+ AB8500_PIN_GPIO19,
+ AB8500_PIN_GPIO20,
+ AB8500_PIN_GPIO21,
+ AB8500_PIN_GPIO22,
+ AB8500_PIN_GPIO23,
+ AB8500_PIN_GPIO24,
+ AB8500_PIN_GPIO25,
+ AB8500_PIN_GPIO26,
+ AB8500_PIN_GPIO27,
+ AB8500_PIN_GPIO28,
+ AB8500_PIN_GPIO29,
+ AB8500_PIN_GPIO30,
+ AB8500_PIN_GPIO31,
+ AB8500_PIN_GPIO32,
+ AB8500_PIN_GPIO33,
+ AB8500_PIN_GPIO34,
+ AB8500_PIN_GPIO35,
+ AB8500_PIN_GPIO36,
+ AB8500_PIN_GPIO37,
+ AB8500_PIN_GPIO38,
+ AB8500_PIN_GPIO39,
+ AB8500_PIN_GPIO40,
+ AB8500_PIN_GPIO41,
+ AB8500_PIN_GPIO42,
+ /* AB9540 GPIO extends support provided by AB8500 */
+ AB9540_PIN_GPIO43,
+ AB9540_PIN_GPIO44,
+ AB9540_PIN_GPIO45,
+ AB9540_PIN_GPIO46,
+ AB9540_PIN_GPIO47,
+ AB9540_PIN_GPIO48,
+ AB9540_PIN_GPIO49,
+ AB9540_PIN_GPIO50,
+ AB9540_PIN_GPIO51,
+ AB9540_PIN_GPIO52,
+ AB9540_PIN_GPIO53,
+ /*
+ * AB9540_PIN_GPIO60 is configured, in the AB9540 GPIO registers, where
+ * AB9540_PIN_GPIO54 would be expected. AB9540_PIN_GPIO54 to
+ * AB9540_PIN_GPIO59 do not exist and no reserved space has been left
+ * for them in the registers. Therefore the enum goes directly from
+ * AB9540_PIN_GPIO53 to AB9540_PIN_GPIO60.
+ */
+ AB9540_PIN_GPIO60,
};
+int ab8500_config_pulldown(struct device *dev,
+ enum ab8500_pin gpio, bool enable);
+
+int ab8500_gpio_config_select(struct device *dev,
+ enum ab8500_pin gpio, bool gpio_select);
+
+int ab8500_gpio_config_get_select(struct device *dev,
+ enum ab8500_pin gpio, bool *gpio_select);
+
#endif /* _AB8500_GPIO_H */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-25 05:26:26 +0000