Intel Merrifield uses a special address space reserved for Family-Level Interface Shim (FLIS) that allows consumers to mux and configure pins.
Create a platform device for it. Signed-off-by: Andy Shevchenko <[email protected]> --- In v2: - add missed header (asm/intel-mid.h) arch/x86/platform/intel-mid/device_libs/Makefile | 2 + .../intel-mid/device_libs/platform_mrfld_pinctrl.c | 43 ++++++++++++++++++++++ 2 files changed, 45 insertions(+) create mode 100644 arch/x86/platform/intel-mid/device_libs/platform_mrfld_pinctrl.c diff --git a/arch/x86/platform/intel-mid/device_libs/Makefile b/arch/x86/platform/intel-mid/device_libs/Makefile index 744638f..ff1d911 100644 --- a/arch/x86/platform/intel-mid/device_libs/Makefile +++ b/arch/x86/platform/intel-mid/device_libs/Makefile @@ -1,3 +1,5 @@ +# Family-Level Interface Shim (FLIS) +obj-$(subst m,y,$(CONFIG_PINCTRL_MERRIFIELD)) += platform_mrfld_pinctrl.o # IPC Devices obj-y += platform_ipc.o obj-$(subst m,y,$(CONFIG_MFD_INTEL_MSIC)) += platform_msic.o diff --git a/arch/x86/platform/intel-mid/device_libs/platform_mrfld_pinctrl.c b/arch/x86/platform/intel-mid/device_libs/platform_mrfld_pinctrl.c new file mode 100644 index 0000000..83f3d97 --- /dev/null +++ b/arch/x86/platform/intel-mid/device_libs/platform_mrfld_pinctrl.c @@ -0,0 +1,43 @@ +/* + * Intel Merrifield FLIS platform device initilization file + * + * Copyright (C) 2016, Intel Corporation + * + * Author: Andy Shevchenko <[email protected]> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; version 2 + * of the License. + */ + +#include <linux/init.h> +#include <linux/ioport.h> +#include <linux/platform_device.h> + +#include <asm/intel-mid.h> + +#define FLIS_BASE_ADDR 0xff0c0000 +#define FLIS_LENGTH 0x8000 + +static struct resource mrfld_pinctrl_mmio_resource = { + .start = FLIS_BASE_ADDR, + .end = FLIS_BASE_ADDR + FLIS_LENGTH - 1, + .flags = IORESOURCE_MEM, +}; + +static struct platform_device mrfld_pinctrl_device = { + .name = "pinctrl-merrifield", + .id = PLATFORM_DEVID_NONE, + .resource = &mrfld_pinctrl_mmio_resource, + .num_resources = 1, +}; + +static int __init mrfld_pinctrl_init(void) +{ + if (intel_mid_identify_cpu() == INTEL_MID_CPU_CHIP_TANGIER) + return platform_device_register(&mrfld_pinctrl_device); + + return -ENODEV; +} +arch_initcall(mrfld_pinctrl_init); -- 2.8.1
