x86/platform/intel-mid: Enable WiFi on Intel Edison

Intel Edison board provides built-in WiFi dongle based on Broadcom BCM43340.

Append the essential data to enable WiFi on Intel Edison.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20160831135713.79066-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

2 files changed, 97 insertions, 0 deletions

diff --git a/arch/x86/platform/intel-mid/device_libs/Makefile b/arch/x86/platform/intel-mid/device_libs/Makefile
index fc135bf70511..a4711b5e94f3 100644
--- a/arch/x86/platform/intel-mid/device_libs/Makefile
+++ b/arch/x86/platform/intel-mid/device_libs/Makefile
@@ -1,5 +1,7 @@
 # Family-Level Interface Shim (FLIS)
 obj-$(subst m,y,$(CONFIG_PINCTRL_MERRIFIELD)) += platform_mrfld_pinctrl.o
+# WiFi
+obj-$(subst m,y,$(CONFIG_BRCMFMAC_SDIO)) += platform_bcm43xx.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_bcm43xx.c b/arch/x86/platform/intel-mid/device_libs/platform_bcm43xx.c
new file mode 100644
index 000000000000..4392c15ed9e0
--- /dev/null
+++ b/arch/x86/platform/intel-mid/device_libs/platform_bcm43xx.c
@@ -0,0 +1,95 @@
+/*
+ * platform_bcm43xx.c: bcm43xx platform data initilization file
+ *
+ * (C) Copyright 2016 Intel Corporation
+ * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
+ *
+ * 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/gpio.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/fixed.h>
+#include <linux/sfi.h>
+
+#include <asm/intel-mid.h>
+
+#define WLAN_SFI_GPIO_IRQ_NAME          "WLAN-interrupt"
+#define WLAN_SFI_GPIO_ENABLE_NAME       "WLAN-enable"
+
+#define WLAN_DEV_NAME                   "0000:00:01.3"
+
+static struct regulator_consumer_supply bcm43xx_vmmc_supply = {
+        .dev_name               = WLAN_DEV_NAME,
+        .supply                 = "vmmc",
+};
+
+static struct regulator_init_data bcm43xx_vmmc_data = {
+        .constraints = {
+                .valid_ops_mask         = REGULATOR_CHANGE_STATUS,
+        },
+        .num_consumer_supplies  = 1,
+        .consumer_supplies      = &bcm43xx_vmmc_supply,
+};
+
+static struct fixed_voltage_config bcm43xx_vmmc = {
+        .supply_name            = "bcm43xx-vmmc-regulator",
+        /*
+         * Announce 2.0V here to be compatible with SDIO specification. The
+         * real voltage and signaling are still 1.8V.
+         */
+        .microvolts             = 2000000,              /* 1.8V */
+        .gpio                   = -EINVAL,
+        .startup_delay          = 250 * 1000,           /* 250ms */
+        .enable_high            = 1,                    /* active high */
+        .enabled_at_boot        = 0,                    /* disabled at boot */
+        .init_data              = &bcm43xx_vmmc_data,
+};
+
+static struct platform_device bcm43xx_vmmc_regulator = {
+        .name           = "reg-fixed-voltage",
+        .id             = PLATFORM_DEVID_AUTO,
+        .dev = {
+                .platform_data  = &bcm43xx_vmmc,
+        },
+};
+
+static int __init bcm43xx_regulator_register(void)
+{
+        int ret;
+
+        bcm43xx_vmmc.gpio = get_gpio_by_name(WLAN_SFI_GPIO_ENABLE_NAME);
+        ret = platform_device_register(&bcm43xx_vmmc_regulator);
+        if (ret) {
+                pr_err("%s: vmmc regulator register failed\n", __func__);
+                return ret;
+        }
+
+        return 0;
+}
+
+static void __init *bcm43xx_platform_data(void *info)
+{
+        int ret;
+
+        ret = bcm43xx_regulator_register();
+        if (ret)
+                return NULL;
+
+        pr_info("Using generic wifi platform data\n");
+
+        /* For now it's empty */
+        return NULL;
+}
+
+static const struct devs_id bcm43xx_clk_vmmc_dev_id __initconst = {
+        .name                   = "bcm43xx_clk_vmmc",
+        .type                   = SFI_DEV_TYPE_SD,
+        .get_platform_data      = &bcm43xx_platform_data,
+};
+
+sfi_device(bcm43xx_clk_vmmc_dev_id);