linux-kernel - [PATCH v1 1/2] x86/platform/intel-mid: Enable WiFi on Intel Edison

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Date:   Wed, 31 Aug 2016 16:57:12 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        "H. Peter Anvin" <hpa@...or.com>, x86@...nel.org
Cc:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v1 1/2] 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@...ux.intel.com>
---
 arch/x86/platform/intel-mid/device_libs/Makefile   |  2 +
 .../intel-mid/device_libs/platform_bcm43xx.c       | 95 ++++++++++++++++++++++
 2 files changed, 97 insertions(+)
 create mode 100644 arch/x86/platform/intel-mid/device_libs/platform_bcm43xx.c

diff --git a/arch/x86/platform/intel-mid/device_libs/Makefile b/arch/x86/platform/intel-mid/device_libs/Makefile
index fc135bf..a4711b5 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 0000000..4392c15
--- /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@...ux.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);
-- 
2.9.3