From a435ae1d51e2f18414f2a87219fdbe068231e692 Mon Sep 17 00:00:00 2001 From: Lee Jones Date: Fri, 7 Sep 2012 12:14:57 +0100 Subject: [PATCH] mfd: Enable the tc3589x for Device Tree 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. Signed-off-by: Lee Jones Acked-by: Linus Walleij Signed-off-by: Samuel Ortiz --- 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 2df44acaf907..8f4c853ca116 100644 --- a/drivers/mfd/tc3589x.c +++ b/drivers/mfd/tc3589x.c @@ -12,6 +12,7 @@ #include #include #include +#include #include #include @@ -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; -- GitLab