[U-Boot] [PATCH] armv8: emc2305: add support for fan controller

[Meenakshi Aggarwal]

Add support for fan controller emc2305.
Enable support of FAN controller for LX2160A RDB board.

Signed-off-by: Meenakshi Aggarwal <meenakshi.aggarwal at nxp.com>
---
 arch/arm/cpu/armv8/fsl-layerscape/Kconfig | 22 +++++++++
 board/freescale/common/Makefile           |  2 +
 board/freescale/common/emc2305.c          | 75 +++++++++++++++++++++++++++++++
 board/freescale/common/emc2305.h          | 20 +++++++++
 board/freescale/lx2160a/lx2160a.c         |  9 ++++
 5 files changed, 128 insertions(+)
 create mode 100644 board/freescale/common/emc2305.c
 create mode 100644 board/freescale/common/emc2305.h

diff --git a/arch/arm/cpu/armv8/fsl-layerscape/Kconfig b/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
index 5dba2af..d746e78 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
+++ b/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
@@ -346,6 +346,28 @@ 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 I2C_MUX_CH_EMC2305
+	hex "I2C channel where EMC2305 is connected"
+	default 0x9 if ARCH_LX2160A
+
+config I2C_EMC2305_ADDR
+	hex "I2C channel where EMC2305 is connected"
+	default 0x4D if ARCH_LX2160A
+
+config I2C_EMC2305_CMD
+	hex "EMC2305 made I2C compliant"
+	default 0x40 if ARCH_LX2160A
+
+config I2C_EMC2305_PWM
+	hex "Speed settings for Fan controller"
+	default 0x80 if ARCH_LX2160A
+
 config SECURE_BOOT
 	bool "Secure Boot"
 	help
diff --git a/board/freescale/common/Makefile b/board/freescale/common/Makefile
index e3c5eae..a9d61a8 100644
--- a/board/freescale/common/Makefile
+++ b/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/
diff --git a/board/freescale/common/emc2305.c b/board/freescale/common/emc2305.c
new file mode 100644
index 0000000..46f43e0
--- /dev/null
+++ b/board/freescale/common/emc2305.c
@@ -0,0 +1,75 @@
+// 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>
+#ifdef CONFIG_FSL_LSCH2
+#include <asm/arch/immap_lsch2.h>
+#elif defined(CONFIG_FSL_LSCH3)
+#include <asm/arch/immap_lsch3.h>
+#else
+#include <asm/immap_85xx.h>
+#endif
+#include "emc2305.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+void configure_emc2305(void)
+{
+	u8 data;
+
+	data = CONFIG_I2C_EMC2305_CMD;
+	if (i2c_write(CONFIG_I2C_EMC2305_ADDR,
+		      I2C_EMC2305_CONF, 1, &data, 1) != 0){
+		printf("Error: failed to configure I2C fan @%x\n",
+		       CONFIG_I2C_EMC2305_ADDR);
+	}
+}
+
+void set_fan_speed(void)
+{
+	u8 data;
+
+	data = CONFIG_I2C_EMC2305_PWM;
+	if (i2c_write(CONFIG_I2C_EMC2305_ADDR,
+		      I2C_EMC2305_FAN1, 1, &data, 1) != 0){
+		printf("Error: failed to change fan speed @%x\n",
+		       I2C_EMC2305_FAN1);
+	}
+
+	if (i2c_write(CONFIG_I2C_EMC2305_ADDR,
+		      I2C_EMC2305_FAN2, 1, &data, 1) != 0){
+		printf("Error: failed to change fan speed @%x\n",
+		       I2C_EMC2305_FAN2);
+	}
+
+	if (i2c_write(CONFIG_I2C_EMC2305_ADDR,
+		      I2C_EMC2305_FAN3, 1, &data, 1) != 0){
+		printf("Error: failed to change fan speed @%x\n",
+		       I2C_EMC2305_FAN3);
+	}
+
+	if (i2c_write(CONFIG_I2C_EMC2305_ADDR,
+		      I2C_EMC2305_FAN4, 1, &data, 1) != 0){
+		printf("Error: failed to change fan speed @%x\n",
+		       I2C_EMC2305_FAN4);
+	}
+
+	if (i2c_write(CONFIG_I2C_EMC2305_ADDR,
+		      I2C_EMC2305_FAN5, 1, &data, 1) != 0){
+		printf("Error: failed to change fan speed @%x\n",
+		       I2C_EMC2305_FAN5);
+	}
+}
+
+void emc2305_init(void)
+{
+	configure_emc2305();
+	set_fan_speed();
+}
diff --git a/board/freescale/common/emc2305.h b/board/freescale/common/emc2305.h
new file mode 100644
index 0000000..ebbe20f
--- /dev/null
+++ b/board/freescale/common/emc2305.h
@@ -0,0 +1,20 @@
+/* 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
+
+void emc2305_init(void);
+
+#endif  /* __EMC2305_H_ */
diff --git a/board/freescale/lx2160a/lx2160a.c b/board/freescale/lx2160a/lx2160a.c
index 530f658..a4c54a2 100644
--- a/board/freescale/lx2160a/lx2160a.c
+++ b/board/freescale/lx2160a/lx2160a.c
@@ -26,6 +26,10 @@
 #include "../common/vid.h"
 #include <fsl_immap.h>
 
+#ifdef CONFIG_EMC2305
+#include "../common/emc2305.h"
+#endif
+
 #ifdef CONFIG_TARGET_LX2160AQDS
 #define CFG_MUX_I2C_SDHC(reg, value)	((reg & 0x3f) | value)
 #define SET_CFG_MUX1_SDHC1_SDHC(reg) (reg & 0x3f)
@@ -93,6 +97,11 @@ int board_early_init_f(void)
 	/* get required clock for UART IP */
 	uart_get_clock();
 
+#ifdef CONFIG_EMC2305
+	select_i2c_ch_pca9547(CONFIG_I2C_MUX_CH_EMC2305);
+	emc2305_init();
+	select_i2c_ch_pca9547(I2C_MUX_CH_DEFAULT);
+#endif
 	fsl_lsch3_early_init_f();
 	return 0;
 }
-- 
1.9.1