From: Anshul Jain <anshulj@nvidia.com>
Date: Tue, 13 Aug 2013 02:17:33 +0000 (-0700)
Subject: arm: tegra12: loki: PWM fan device added
X-Git-Tag: daily-2014.03.25.0_l4t/l4t-r19.1~2069^2~125
X-Git-Url: https://nv-tegra.nvidia.com/r/gitweb?p=linux-3.10.git;a=commitdiff_plain;h=a6c922184ec0387b0aa06df06def15b9301d0445

arm: tegra12: loki: PWM fan device added

This change add the PWM fan device.

Bug 1364451

Change-Id: I53e9493efdbbf0507a5cda97dea3a5c2c0898c8e
Signed-off-by: Anshul Jain <anshulj@nvidia.com>
Reviewed-on: http://git-master/r/274643
Reviewed-by: Diwakar Tundlam <dtundlam@nvidia.com>
Tested-by: Diwakar Tundlam <dtundlam@nvidia.com>
---

diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile
index b114c9482f2..658af051a7f 100644
--- a/arch/arm/mach-tegra/Makefile
+++ b/arch/arm/mach-tegra/Makefile
@@ -278,6 +278,7 @@ obj-${CONFIG_MACH_LOKI}               	+= board-loki-sensors.o
 obj-${CONFIG_MACH_LOKI}               	+= board-loki-panel.o
 obj-${CONFIG_MACH_LOKI}               	+= board-loki-pinmux.o
 obj-${CONFIG_MACH_LOKI}               	+= board-loki-power.o
+obj-${CONFIG_MACH_LOKI}               	+= board-loki-fan.o
 obj-${CONFIG_MACH_LOKI}               	+= board-tn8-power.o
 obj-${CONFIG_MACH_LOKI}               	+= board-loki-powermon.o
 obj-${CONFIG_MACH_LOKI}               	+= board-loki-sdhci.o
diff --git a/arch/arm/mach-tegra/board-loki-fan.c b/arch/arm/mach-tegra/board-loki-fan.c
new file mode 100644
index 00000000000..b493a908b96
--- /dev/null
+++ b/arch/arm/mach-tegra/board-loki-fan.c
@@ -0,0 +1,79 @@
+/*
+ * arch/arm/mach-tegra/board-loki-fan.c
+ *
+ * Copyright (c) 2013 NVIDIA CORPORATION, All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+#include <linux/gpio.h>
+#include <linux/platform_data/pwm_fan.h>
+#include <linux/platform_device.h>
+
+#include <mach/gpio-tegra.h>
+
+#include "gpio-names.h"
+#include "devices.h"
+#include "board.h"
+#include "board-common.h"
+#include "board-loki.h"
+#include "tegra-board-id.h"
+
+static struct pwm_fan_platform_data fan_data_delta_6k = {
+	.active_steps = MAX_ACTIVE_STATES,
+	.active_rpm = {
+		0, 1000, 2000, 3000, 4000, 5000, 6000, 7000, 10000, 11000},
+	.active_pwm = {0, 80*1024, 110*1024 , 150*1024, 235*1024, 240*1024,
+				245*1024, 250*1024, 252*1024, 255*1024},
+	.active_rru = {1024*40, 1024*2, 1024, 256,
+						256, 256, 256, 256, 256, 256},
+	.active_rrd = {1024*40, 1024*2, 1024, 256, 256,
+						256, 256, 128, 128, 128},
+	.state_cap_lookup = {2, 2, 2, 2, 2, 2, 2, 3, 3, 3},
+	.pwm_period = 256,
+	.pwm_id = 0,
+	.step_time = 100, /*msecs*/
+	.state_cap = 2,
+	.precision_multiplier = 1024,
+	.tach_gpio = TEGRA_GPIO_PU2,
+};
+
+static struct platform_device pwm_fan_therm_cooling_device_delta_6k = {
+	.name = "pwm-fan",
+	.id = -1,
+	.num_resources = 0,
+	.dev = {
+		.platform_data = &fan_data_delta_6k,
+	},
+};
+
+int __init loki_fan_init(void)
+{
+	int err;
+	struct board_info board_info;
+
+	tegra_get_board_info(&board_info);
+
+	err = gpio_request(TEGRA_GPIO_PU3, "pwm-fan");
+	if (err < 0) {
+		pr_err("FAN:gpio request failed\n");
+		return err;
+	}
+	gpio_free(TEGRA_GPIO_PU3);
+
+	platform_device_register(
+		&pwm_fan_therm_cooling_device_delta_6k);
+			pr_info("Registering Fan!\n");
+	return 0;
+}
diff --git a/arch/arm/mach-tegra/board-loki.c b/arch/arm/mach-tegra/board-loki.c
index 85c83327fae..6369c761964 100644
--- a/arch/arm/mach-tegra/board-loki.c
+++ b/arch/arm/mach-tegra/board-loki.c
@@ -826,6 +826,7 @@ static void __init tegra_loki_late_init(void)
 	tegra_serial_debug_init(TEGRA_UARTD_BASE, INT_WDT_CPU, NULL, -1, -1);
 
 	loki_sensors_init();
+	loki_fan_init();
 #if 0
 	loki_soctherm_init();
 #endif
diff --git a/arch/arm/mach-tegra/board-loki.h b/arch/arm/mach-tegra/board-loki.h
index 91177172da5..78b6ae26a52 100644
--- a/arch/arm/mach-tegra/board-loki.h
+++ b/arch/arm/mach-tegra/board-loki.h
@@ -140,5 +140,6 @@ GPIO, also the GPIO is same for T114 interposer and T124*/
 /* TN8 specific */
 
 int tn8_regulator_init(void);
+int loki_fan_init(void);
 
 #endif