From: Phil Reid preid@electromag.com.au
[ Upstream commit 6dbc6e6f58556369bf999cd7d9793586f1b0e4b4 ]
Currently probing of the mcp23s08 results in an error message "detected irqchip that is shared with multiple gpiochips: please fix the driver"
This is due to the following:
Call to mcp23s08_irqchip_setup() with call hierarchy: mcp23s08_irqchip_setup() gpiochip_irqchip_add_nested() gpiochip_irqchip_add_key() gpiochip_set_irq_hooks()
Call to devm_gpiochip_add_data() with call hierarchy: devm_gpiochip_add_data() gpiochip_add_data_with_key() gpiochip_add_irqchip() gpiochip_set_irq_hooks()
The gpiochip_add_irqchip() returns immediately if there isn't a irqchip but we added a irqchip due to the previous mcp23s08_irqchip_setup() call. So it calls gpiochip_set_irq_hooks() a second time.
Fix this by moving the call to devm_gpiochip_add_data before the call to mcp23s08_irqchip_setup
Fixes: 02e389e63e35 ("pinctrl: mcp23s08: fix irq setup order") Suggested-by: Marco Felsch m.felsch@pengutronix.de Signed-off-by: Phil Reid preid@electromag.com.au Signed-off-by: Linus Walleij linus.walleij@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/pinctrl/pinctrl-mcp23s08.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/pinctrl/pinctrl-mcp23s08.c b/drivers/pinctrl/pinctrl-mcp23s08.c index 5d7a8514def9..b727de5654cd 100644 --- a/drivers/pinctrl/pinctrl-mcp23s08.c +++ b/drivers/pinctrl/pinctrl-mcp23s08.c @@ -881,6 +881,10 @@ static int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev, if (ret < 0) goto fail;
+ ret = devm_gpiochip_add_data(dev, &mcp->chip, mcp); + if (ret < 0) + goto fail; + mcp->irq_controller = device_property_read_bool(dev, "interrupt-controller"); if (mcp->irq && mcp->irq_controller) { @@ -922,10 +926,6 @@ static int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev, goto fail; }
- ret = devm_gpiochip_add_data(dev, &mcp->chip, mcp); - if (ret < 0) - goto fail; - if (one_regmap_config) { mcp->pinctrl_desc.name = devm_kasprintf(dev, GFP_KERNEL, "mcp23xxx-pinctrl.%d", raw_chip_address);