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Message-Id: <1355501979-1157-11-git-send-email-lee.jones@linaro.org>
Date: Fri, 14 Dec 2012 16:19:28 +0000
From: Lee Jones <lee.jones@...aro.org>
To: linux-kernel@...r.kernel.org
Cc: linus.walleij@...aro.org,
Michel JAOUEN <michel.jaouen@...ricsson.com>,
Lee Jones <lee.jones@...aro.org>,
Maxime Coquelin <maxime.coquelin@...ericsson.com>,
Alex MACRO <alex.macro@...ricsson.com>
Subject: [PATCH 10/21] gpio: ab8500: Add support for the AB9540
From: Michel JAOUEN <michel.jaouen@...ricsson.com>
Signed-off-by: Lee Jones <lee.jones@...aro.org>
Signed-off-by: Maxime Coquelin <maxime.coquelin@...ericsson.com>
Signed-off-by: Alex MACRO <alex.macro@...ricsson.com>
Signed-off-by: Michel JAOUEN <michel.jaouen@...ricsson.com>
Reviewed-by: Jonas ABERG <jonas.aberg@...ricsson.com>
Reviewed-by: Bengt JONSSON <bengt.g.jonsson@...ricsson.com>
Reviewed-by: Bibek BASU <bibek.basu@...ricsson.com>
---
drivers/gpio/gpio-ab8500.c | 92 +++++++++++++++++++++++++++++++++-----------
1 file changed, 70 insertions(+), 22 deletions(-)
diff --git a/drivers/gpio/gpio-ab8500.c b/drivers/gpio/gpio-ab8500.c
index 273f7ca..b78cf2f 100644
--- a/drivers/gpio/gpio-ab8500.c
+++ b/drivers/gpio/gpio-ab8500.c
@@ -23,6 +23,13 @@
/*
+ * 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
* Bank: 0x10
*/
@@ -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 +71,12 @@
#define AB8500_GPIO_IN4_REG 0x43
#define AB8500_GPIO_IN5_REG 0x44
#define AB8500_GPIO_IN6_REG 0x45
+#define AB9540_GPIO_IN7_REG 0x46
#define AB8500_GPIO_ALTFUN_REG 0x50
-#define ALTFUN_REG_INDEX 6
+#define AB8500_ALTFUN_REG_INDEX 6
+#define AB9540_ALTFUN_REG_INDEX 7
#define AB8500_NUM_GPIO 42
+#define AB9540_NUM_GPIO 54
#define AB8500_NUM_VIR_GPIO_IRQ 16
enum ab8500_gpio_action {
@@ -73,6 +87,11 @@ 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 +101,32 @@ 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},
};
+
/**
* to_ab8500_gpio() - get the pointer to ab8500_gpio
* @chip: Member of the structure ab8500_gpio
@@ -162,28 +206,13 @@ 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 = 5, .end = 12}, /* GPIO numbers start from 1 */
- {.start = 23, .end = 24},
- {.start = 35, .end = 40},
- };
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;
@@ -412,6 +441,8 @@ static int __devinit ab8500_gpio_probe(struct platform_device *pdev)
struct ab8500_gpio *ab8500_gpio;
int ret;
int i;
+ int last_gpio_sel_reg;
+ int altfun_reg_index;
pdata = ab8500_pdata->gpio;
if (!pdata) {
@@ -427,10 +458,27 @@ 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 {
+ 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);
/*
@@ -439,7 +487,7 @@ 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]);
@@ -460,7 +508,7 @@ static int __devinit ab8500_gpio_probe(struct platform_device *pdev)
}
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;
--
1.7.9.5
--
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