Using this driver on socfpga gen5 with DM_I2C enabled leads to a data abort as the 'i2c' reset property cannot be found (the gen5 dtsi does not provide reset-names).
The actual bug was to check 'if (&priv->reset_ctl)', which is never false.
While at it, convert the driver to use 'reset_get_bulk' instead of looking at a specific named reset and also make it release the reset on driver remove before starting the OS.
Fixes: 622597dee4f6 ("i2c: designware: add reset ctrl to driver") Signed-off-by: Simon Goldschmidt simon.k.r.goldschmidt@gmail.com ---
Changes in v2: None
drivers/i2c/designware_i2c.c | 20 ++++++++++++++------ 1 file changed, 14 insertions(+), 6 deletions(-)
diff --git a/drivers/i2c/designware_i2c.c b/drivers/i2c/designware_i2c.c index 63e40823f1..9ccc2411a6 100644 --- a/drivers/i2c/designware_i2c.c +++ b/drivers/i2c/designware_i2c.c @@ -34,7 +34,7 @@ static struct dw_scl_sda_cfg byt_config = { struct dw_i2c { struct i2c_regs *regs; struct dw_scl_sda_cfg *scl_sda_cfg; - struct reset_ctl reset_ctl; + struct reset_ctl_bulk resets; };
#ifdef CONFIG_SYS_I2C_DW_ENABLE_STATUS_UNSUPPORTED @@ -562,16 +562,22 @@ static int designware_i2c_probe(struct udevice *bus) priv->regs = (struct i2c_regs *)devfdt_get_addr_ptr(bus); }
- ret = reset_get_by_name(bus, "i2c", &priv->reset_ctl); + ret = reset_get_bulk(bus, &priv->resets); if (ret) - pr_info("reset_get_by_name() failed: %d\n", ret); - - if (&priv->reset_ctl) - reset_deassert(&priv->reset_ctl); + dev_warn(bus, "Can't get reset: %d\n", ret); + else + reset_deassert_bulk(&priv->resets);
return __dw_i2c_init(priv->regs, 0, 0); }
+static int designware_i2c_remove(struct udevice *dev) +{ + struct dw_i2c *priv = dev_get_priv(dev); + + return reset_release_bulk(&priv->resets); +} + static int designware_i2c_bind(struct udevice *dev) { static int num_cards; @@ -613,6 +619,8 @@ U_BOOT_DRIVER(i2c_designware) = { .bind = designware_i2c_bind, .probe = designware_i2c_probe, .priv_auto_alloc_size = sizeof(struct dw_i2c), + .remove = designware_i2c_remove, + .flags = DM_FLAG_OS_PREPARE, .ops = &designware_i2c_ops, };