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Subject[PATCH 17/19] mfd: Enable the tc3589x for Device Tree
Date
Here we provide a means to probe and extract vital information
from Device Tree when booting with it enabled. Without this
patch sub-devices wouldn't be able to reference the tc3589x
from Device Tree.

CC: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
drivers/mfd/tc3589x.c | 43 ++++++++++++++++++++++++++++++++++++++++---
1 file changed, 40 insertions(+), 3 deletions(-)

diff --git a/drivers/mfd/tc3589x.c b/drivers/mfd/tc3589x.c
index 2df44ac..8f4c853 100644
--- a/drivers/mfd/tc3589x.c
+++ b/drivers/mfd/tc3589x.c
@@ -12,6 +12,7 @@
#include <linux/irqdomain.h>
#include <linux/slab.h>
#include <linux/i2c.h>
+#include <linux/of.h>
#include <linux/mfd/core.h>
#include <linux/mfd/tc3589x.h>

@@ -146,6 +147,7 @@ static struct mfd_cell tc3589x_dev_gpio[] = {
.name = "tc3589x-gpio",
.num_resources = ARRAY_SIZE(gpio_resources),
.resources = &gpio_resources[0],
+ .of_compatible = "tc3589x-gpio",
},
};

@@ -154,6 +156,7 @@ static struct mfd_cell tc3589x_dev_keypad[] = {
.name = "tc3589x-keypad",
.num_resources = ARRAY_SIZE(keypad_resources),
.resources = &keypad_resources[0],
+ .of_compatible = "tc3589x-keypad",
},
};

@@ -221,7 +224,7 @@ static struct irq_domain_ops tc3589x_irq_ops = {
.xlate = irq_domain_xlate_twocell,
};

-static int tc3589x_irq_init(struct tc3589x *tc3589x)
+static int tc3589x_irq_init(struct tc3589x *tc3589x, struct device_node *np)
{
int base = tc3589x->irq_base;

@@ -232,7 +235,7 @@ static int tc3589x_irq_init(struct tc3589x *tc3589x)
}
else {
tc3589x->domain = irq_domain_add_linear(
- NULL, TC3589x_NR_INTERNAL_IRQS,
+ np, TC3589x_NR_INTERNAL_IRQS,
&tc3589x_irq_ops, tc3589x);
}

@@ -309,13 +312,47 @@ static int __devinit tc3589x_device_init(struct tc3589x *tc3589x)
return ret;
}

+static int tc3589x_of_probe(struct device_node *np,
+ struct tc3589x_platform_data *pdata)
+{
+ struct device_node *child;
+
+ for_each_child_of_node(np, child) {
+ if (!strcmp(child->name, "tc3589x_gpio")) {
+ pdata->block |= TC3589x_BLOCK_GPIO;
+ }
+ if (!strcmp(child->name, "tc3589x_keypad")) {
+ pdata->block |= TC3589x_BLOCK_KEYPAD;
+ }
+ }
+
+ return 0;
+}
+
static int __devinit tc3589x_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct tc3589x_platform_data *pdata = i2c->dev.platform_data;
+ struct device_node *np = i2c->dev.of_node;
struct tc3589x *tc3589x;
int ret;

+ if (!pdata) {
+ if (np) {
+ pdata = devm_kzalloc(&i2c->dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return -ENOMEM;
+
+ ret = tc3589x_of_probe(np, pdata);
+ if (ret)
+ return ret;
+ }
+ else {
+ dev_err(&i2c->dev, "No platform data or DT found\n");
+ return -EINVAL;
+ }
+ }
+
if (!i2c_check_functionality(i2c->adapter, I2C_FUNC_SMBUS_BYTE_DATA
| I2C_FUNC_SMBUS_I2C_BLOCK))
return -EIO;
@@ -338,7 +375,7 @@ static int __devinit tc3589x_probe(struct i2c_client *i2c,
if (ret)
goto out_free;

- ret = tc3589x_irq_init(tc3589x);
+ ret = tc3589x_irq_init(tc3589x, np);
if (ret)
goto out_free;

--
1.7.9.5


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