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authorWenyou.Yang@microchip.com <Wenyou.Yang@microchip.com>2017-07-31 09:56:27 +0800
committerHeiko Schocher <hs@denx.de>2017-08-09 06:13:53 +0200
commit0bc8f640a4d7ed72503f54cc398e382c9702415c (patch)
tree9a1575667d5773fc3aedcb1d03d30eb1fd69f52f /drivers/i2c
parent1989374b21089c63019fc9648408c8d609023ffe (diff)
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>
Diffstat (limited to 'drivers/i2c')
-rw-r--r--drivers/i2c/at91_i2c.c26
1 files changed, 24 insertions, 2 deletions
diff --git a/drivers/i2c/at91_i2c.c b/drivers/i2c/at91_i2c.c
index b7298cf7748..d394044f80d 100644
--- 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),