armv8: emc2305: add support for fan controller

Add support for fan controller emc2305.
Signed-off-by: NSriram Dash <sriram.dash@nxp.com>
Signed-off-by: NMeenakshi Aggarwal <meenakshi.aggarwal@nxp.com>
Signed-off-by: NPrabhakar Kushwaha <prabhakar.kushwaha@nxp.com>

arch/arm/cpu/armv8/fsl-layerscape/Kconfig

@@ -346,6 +346,12 @@ config MAX_CPUS
 	  cores, count the reserved ports. This will allocate enough memory
 	  in spin table to properly handle all cores.
 
+config EMC2305
+	bool "Fan controller"
+	help
+	 Enable the EMC2305 fan controller for configuration of fan
+	 speed.
+
 config SECURE_BOOT
 	bool "Secure Boot"
 	help

board/freescale/common/Makefile

@@ -64,6 +64,8 @@ obj-$(CONFIG_POWER_MC34VR500)	+= mc34vr500.o
 
 obj-$(CONFIG_LS102XA_STREAM_ID)	+= ls102xa_stream_id.o
 
+obj-$(CONFIG_EMC2305)              += emc2305.o
+
 # deal with common files for P-series corenet based devices
 obj-$(CONFIG_TARGET_P2041RDB)	+= p_corenet/
 obj-$(CONFIG_TARGET_P3041DS)	+= p_corenet/

board/freescale/common/emc2305.c

+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2018 NXP.
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#include <common.h>
+#include <command.h>
+#include <i2c.h>
+#include <asm/io.h>
+
+#include "emc2305.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+void set_fan_speed(u8 data)
+{
+	u8 index;
+	u8 Fan[NUM_OF_FANS] = {I2C_EMC2305_FAN1,
+			       I2C_EMC2305_FAN2,
+			       I2C_EMC2305_FAN3,
+			       I2C_EMC2305_FAN4,
+			       I2C_EMC2305_FAN5};
+
+	for (index = 0; index < NUM_OF_FANS; index++) {
+		if (i2c_write(I2C_EMC2305_ADDR, Fan[index], 1, &data, 1) != 0) {
+			printf("Error: failed to change fan speed @%x\n",
+			       Fan[index]);
+		}
+	}
+}
+
+void emc2305_init(void)
+{
+	u8 data;
+
+	data = I2C_EMC2305_CMD;
+	if (i2c_write(I2C_EMC2305_ADDR, I2C_EMC2305_CONF, 1, &data, 1) != 0)
+		printf("Error: failed to configure EMC2305\n");
+}

board/freescale/common/emc2305.h

+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright 2018 NXP
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#ifndef __EMC2305_H_
+#define __EMC2305_H_
+
+#define I2C_EMC2305_CONF		0x20
+#define I2C_EMC2305_FAN1		0x30
+#define I2C_EMC2305_FAN2		0x40
+#define I2C_EMC2305_FAN3		0x50
+#define I2C_EMC2305_FAN4		0x60
+#define I2C_EMC2305_FAN5		0x70
+
+#define NUM_OF_FANS			5
+
+void emc2305_init(void);
+void set_fan_speed(u8 data);
+
+#endif  /* __EMC2305_H_ */