diff options
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/mvtwsi.c | 13 | ||||
| -rw-r--r-- | drivers/i2c/rcar_i2c.c | 8 |
2 files changed, 20 insertions, 1 deletions
diff --git a/drivers/i2c/mvtwsi.c b/drivers/i2c/mvtwsi.c index d33e2c7c9d8..236bfb8d8e7 100644 --- a/drivers/i2c/mvtwsi.c +++ b/drivers/i2c/mvtwsi.c @@ -17,7 +17,9 @@ #include <linux/bitops.h> #include <linux/compat.h> #if CONFIG_IS_ENABLED(DM_I2C) +#include <clk.h> #include <dm.h> +#include <reset.h> #endif DECLARE_GLOBAL_DATA_PTR; @@ -835,7 +837,18 @@ static int mvtwsi_i2c_bind(struct udevice *bus) static int mvtwsi_i2c_probe(struct udevice *bus) { struct mvtwsi_i2c_dev *dev = dev_get_priv(bus); + struct reset_ctl reset; + struct clk clk; uint actual_speed; + int ret; + + ret = reset_get_by_index(bus, 0, &reset); + if (!ret) + reset_deassert(&reset); + + ret = clk_get_by_index(bus, 0, &clk); + if (!ret) + clk_enable(&clk); __twsi_i2c_init(dev->base, dev->speed, dev->slaveadd, &actual_speed); dev->speed = actual_speed; diff --git a/drivers/i2c/rcar_i2c.c b/drivers/i2c/rcar_i2c.c index 14bb6603d59..d9ece5e3a80 100644 --- a/drivers/i2c/rcar_i2c.c +++ b/drivers/i2c/rcar_i2c.c @@ -64,6 +64,8 @@ enum rcar_i2c_type { struct rcar_i2c_priv { void __iomem *base; struct clk clk; + u32 fall_ns; + u32 rise_ns; u32 intdelay; u32 icccr; enum rcar_i2c_type type; @@ -278,7 +280,7 @@ static int rcar_i2c_set_speed(struct udevice *dev, uint bus_freq_hz) * = F[sum * ick / 1000000000] * = F[(ick / 1000000) * sum / 1000] */ - sum = 35 + 200 + priv->intdelay; + sum = priv->fall_ns + priv->rise_ns + priv->intdelay; round = (ick + 500000) / 1000000 * sum; round = (round + 500) / 1000; @@ -323,6 +325,10 @@ static int rcar_i2c_probe(struct udevice *dev) int ret; priv->base = dev_read_addr_ptr(dev); + priv->rise_ns = dev_read_u32_default(dev, + "i2c-scl-rising-time-ns", 200); + priv->fall_ns = dev_read_u32_default(dev, + "i2c-scl-falling-time-ns", 35); priv->intdelay = dev_read_u32_default(dev, "i2c-scl-internal-delay-ns", 5); priv->type = dev_get_driver_data(dev); |