In more recent versions of the Linux kernel the driver's probe function returns an error if the "pinctrl-single,register-width" DT property is missing. The lack of this information, in fact, does not allow to know whether to access the registers of the controller at 8, 16, ... bits.
Signed-off-by: Dario Binacchi dariobin@libero.it Reviewed-by: Simon Glass sjg@chromium.org
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Changes in v2: - Updated commit message. - Added Simon Glass review tag.
drivers/pinctrl/pinctrl-single.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/pinctrl/pinctrl-single.c b/drivers/pinctrl/pinctrl-single.c index d5656de8e8..5ade108875 100644 --- a/drivers/pinctrl/pinctrl-single.c +++ b/drivers/pinctrl/pinctrl-single.c @@ -22,7 +22,7 @@ struct single_pdata { fdt_addr_t base; int offset; u32 mask; - int width; + u32 width; bool bits_per_mux; };
@@ -184,9 +184,13 @@ static int single_of_to_plat(struct udevice *dev) fdt_addr_t addr; fdt_size_t size; struct single_pdata *pdata = dev_get_plat(dev); + int ret;
- pdata->width = - dev_read_u32_default(dev, "pinctrl-single,register-width", 0); + ret = dev_read_u32(dev, "pinctrl-single,register-width", &pdata->width); + if (ret) { + dev_err(dev, "missing register width\n"); + return ret; + }
addr = dev_read_addr_size(dev, "reg", &size); if (addr == FDT_ADDR_T_NONE) {