[PATCH v1 4/8] mfd: intel_quark_i2c_gpio: support devices behind i2c bus
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: 2015-09-22 10:10:33
Also in:
linux-gpio, linux-i2c, lkml
Subsystem:
multifunction devices (mfd), the rest · Maintainers:
Lee Jones, Linus Torvalds
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@linux.intel.com> --- drivers/mfd/intel_quark_i2c_gpio.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+)
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,
--
2.5.1