@@ -17,6 +17,7 @@
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/module.h>
+#include <linux/pinctrl/consumer.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/reset.h>
@@ -855,6 +856,17 @@ static int i2c_dw_init_recovery_info(struct dw_i2c_dev *dev)
return PTR_ERR(gpio);
rinfo->sda_gpiod = gpio;
+ rinfo->pinctrl = devm_pinctrl_get(dev->dev);
+ if (IS_ERR(rinfo->pinctrl)) {
+ if (PTR_ERR(rinfo->pinctrl) == -EPROBE_DEFER)
+ return PTR_ERR(rinfo->pinctrl);
+
+ rinfo->pinctrl = NULL;
+ dev_err(dev->dev, "getting pinctrl info failed: bus recovery might not work\n");
+ } else if (!rinfo->pinctrl) {
+ dev_dbg(dev->dev, "pinctrl is disabled, bus recovery might not work\n");
+ }
+
rinfo->recover_bus = i2c_generic_scl_recovery;
rinfo->prepare_recovery = i2c_dw_prepare_recovery;
rinfo->unprepare_recovery = i2c_dw_unprepare_recovery;
scl-gpio = <>; sda-gpio = <>; Are not enough for some SoCs to have a working recovery. Some need: scl-gpio = <>; sda-gpio = <>; pinctrl-names = "default", "recovery"; pinctrl-0 = <&i2c_pins_hw>; pinctrl-1 = <&i2c_pins_gpio>; The driver was not filling rinfo->pinctrl with the device node pinctrl data which is needed by generic recovery code. Signed-off-by: Yann Sionneau <ysionneau@kalray.eu> --- V2 -> V3: * put back 'if (!rinfo->pinctrl)' test since devm_pinctrl_get() can return NULL if CONFIG_PINCTRL is not set. * print an error msg when devm_pinctrl_get() returns an error that is not -EPROBE_DEFER. * print a dbg msg if devm_pinctrl_get() return NULL. V1 -> V2: * remove the unnecessary 'if (!rinfo->pinctrl)' test * test if return is -EPROBE_DEFER, in that case, return it. * Reword the commit message according to review drivers/i2c/busses/i2c-designware-master.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)