x86: pinctrl: Add multi-ACPI control

Add a Kconfig to control whether pinctrl is represented as a single ACPI
device or as multiple devices. In the latter case (the default) we should
return the pin number relative to the pinctrl device.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com>

diff --git a/drivers/pinctrl/intel/Kconfig b/drivers/pinctrl/intel/Kconfig
index e62a2e0..1acc5da 100644 (file)
--- a/drivers/pinctrl/intel/Kconfig
+++ b/drivers/pinctrl/intel/Kconfig
@@ -15,6 +15,18 @@ config INTEL_PINCTRL_IOSTANDBY
        bool
        default y
 
+config INTEL_PINCTRL_MULTI_ACPI_DEVICES
+       bool
+       default y
+       help
+         Enable this if the pinctrl devices are modelled as multiple,
+         separate ACPI devices in the ACPI tables. If enabled, the ACPI
+         devices match the U-Boot pinctrl devices and the pin 'offset' is
+         relatove to a particular pinctrl device. If disabled, there is a
+         single ACPI pinctrl device which includes all U-Boot pinctrl devices
+         and the pin 'offset' is in effect a global pin number.
+
+
 config PINCTRL_INTEL_APL
        bool "Support Intel Apollo Lake (APL)"
        help

diff --git a/drivers/pinctrl/intel/pinctrl.c b/drivers/pinctrl/intel/pinctrl.c
index bf3989b..32ca303 100644 (file)
--- a/drivers/pinctrl/intel/pinctrl.c
+++ b/drivers/pinctrl/intel/pinctrl.c
@@ -427,6 +427,8 @@ int intel_pinctrl_get_acpi_pin(struct udevice *dev, uint offset)
        const struct pad_community *comm = priv->comm;
        int group;
 
+       if (IS_ENABLED(CONFIG_INTEL_PINCTRL_MULTI_ACPI_DEVICES))
+               return offset;
        group = pinctrl_group_index(comm, offset);
 
        /* If pad base is not set then use GPIO number as ACPI pin number */