i2c: at91: Add missing probe function to device driver

Add missing probe function to the device driver to active a device.

Signed-off-by: Wenyou Yang <wenyou.yang@microchip.com>
Reviewed-by: Heiko Schocher <hs@denx.de>

diff --git a/drivers/i2c/at91_i2c.c b/drivers/i2c/at91_i2c.c
index b7298cf774831ffd030f32ca94f31c3752f0fb4f..d394044f80de5362d8b8a77862800093f878602c 100644 (file)
--- a/drivers/i2c/at91_i2c.c
+++ b/drivers/i2c/at91_i2c.c
@@ -199,7 +199,7 @@ static int at91_i2c_enable_clk(struct udevice *dev)
        return 0;
 }
 
-static int at91_i2c_probe(struct udevice *dev, uint chip, uint chip_flags)
+static int at91_i2c_probe_chip(struct udevice *dev, uint chip, uint chip_flags)
 {
        struct at91_i2c_bus *bus = dev_get_priv(dev);
        struct at91_i2c_regs *reg = bus->regs;
@@ -254,11 +254,32 @@ static int at91_i2c_ofdata_to_platdata(struct udevice *dev)
 
 static const struct dm_i2c_ops at91_i2c_ops = {
        .xfer           = at91_i2c_xfer,
-       .probe_chip     = at91_i2c_probe,
+       .probe_chip     = at91_i2c_probe_chip,
        .set_bus_speed  = at91_i2c_set_bus_speed,
        .get_bus_speed  = at91_i2c_get_bus_speed,
 };
 
+static int at91_i2c_probe(struct udevice *dev)
+{
+       struct at91_i2c_bus *bus = dev_get_priv(dev);
+       struct at91_i2c_regs *reg = bus->regs;
+       int ret;
+
+       ret = at91_i2c_enable_clk(dev);
+       if (ret)
+               return ret;
+
+       writel(TWI_CR_SWRST, &reg->cr);
+
+       at91_calc_i2c_clock(dev, bus->clock_frequency);
+
+       writel(bus->cwgr_val, &reg->cwgr);
+       writel(TWI_CR_MSEN, &reg->cr);
+       writel(TWI_CR_SVDIS, &reg->cr);
+
+       return 0;
+}
+
 static const struct at91_i2c_pdata at91rm9200_config = {
        .clk_max_div = 5,
        .clk_offset = 3,
@@ -315,6 +336,7 @@ U_BOOT_DRIVER(i2c_at91) = {
        .name   = "i2c_at91",
        .id     = UCLASS_I2C,
        .of_match = at91_i2c_ids,
+       .probe = at91_i2c_probe,
        .ofdata_to_platdata = at91_i2c_ofdata_to_platdata,
        .per_child_auto_alloc_size = sizeof(struct dm_i2c_chip),
        .priv_auto_alloc_size = sizeof(struct at91_i2c_bus),