On Tue, 22 Sep 2015, Andy Shevchenko wrote:
> On Intel Galileo Gen2 the GPIO expanders are connected to the i2c bus. For
> those devices the ACPI table has specific parameters that refer to an actual
> i2c host controller. Since MFD now copes with that specific configuration we
> have to provide a necessary information how to distinguish devices in ACPI
> namespace. Here the _ADR values are provided.
>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
> ---
> drivers/mfd/intel_quark_i2c_gpio.c | 14 ++++++++++++++
> 1 file changed, 14 insertions(+)
Acked-by: Lee Jones <lee.jones@xxxxxxxxxx>
> diff --git a/drivers/mfd/intel_quark_i2c_gpio.c b/drivers/mfd/intel_quark_i2c_gpio.c
> index 89bd4bf..e9fd33b 100644
> --- a/drivers/mfd/intel_quark_i2c_gpio.c
> +++ b/drivers/mfd/intel_quark_i2c_gpio.c
> @@ -31,6 +31,10 @@
> #define MFD_I2C_BAR 0
> #define MFD_GPIO_BAR 1
>
> +/* ACPI _ADR value to match the child node */
> +#define MFD_ACPI_MATCH_GPIO 0ULL
> +#define MFD_ACPI_MATCH_I2C 1ULL
> +
> /* The base GPIO number under GPIOLIB framework */
> #define INTEL_QUARK_MFD_GPIO_BASE 8
>
> @@ -82,9 +86,14 @@ static struct resource intel_quark_i2c_res[] = {
> },
> };
>
> +static struct mfd_cell_acpi_match intel_quark_acpi_match_i2c = {
> + .adr = MFD_ACPI_MATCH_I2C,
> +};
> +
> static struct mfd_cell intel_quark_mfd_i2c_cell = {
> .id = MFD_I2C_BAR,
> .name = "i2c_designware",
> + .acpi_match = &intel_quark_acpi_match_i2c,
> .num_resources = ARRAY_SIZE(intel_quark_i2c_res),
> .resources = intel_quark_i2c_res,
> .ignore_resource_conflicts = true,
> @@ -96,9 +105,14 @@ static struct resource intel_quark_gpio_res[] = {
> },
> };
>
> +static struct mfd_cell_acpi_match intel_quark_acpi_match_gpio = {
> + .adr = MFD_ACPI_MATCH_GPIO,
> +};
> +
> static struct mfd_cell intel_quark_mfd_gpio_cell = {
> .id = MFD_GPIO_BAR,
> .name = "gpio-dwapb",
> + .acpi_match = &intel_quark_acpi_match_gpio,
> .num_resources = ARRAY_SIZE(intel_quark_gpio_res),
> .resources = intel_quark_gpio_res,
> .ignore_resource_conflicts = true,
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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