I2C: add i2c support for Armada100 platform

Add i2c support to aspenite board with Armada100 soc.

Acked-by: Heiko Schocher <hs@denx.de>
Acked-by: Prafulla Wadaskar <prafulla@marvell.com>
Signed-off-by: Lei Wen <leiwen@marvell.com>

arch/arm/cpu/arm926ejs/armada100/cpu.c

@@ -62,6 +62,16 @@ int arch_cpu_init(void)
 	/* Enable GPIO clock */
 	writel(APBC_APBCLK, &apb1clkres->gpio);
 
+#ifdef CONFIG_I2C_MV
+	/* Enable general I2C clock */
+	writel(APBC_RST | APBC_FNCLK | APBC_APBCLK, &apb1clkres->twsi0);
+	writel(APBC_FNCLK | APBC_APBCLK, &apb1clkres->twsi0);
+
+	/* Enable power I2C clock */
+	writel(APBC_RST | APBC_FNCLK | APBC_APBCLK, &apb1clkres->twsi1);
+	writel(APBC_FNCLK | APBC_APBCLK, &apb1clkres->twsi1);
+#endif
+
 	/*
 	 * Enable Functional and APB clock at 14.7456MHz
 	 * for configured UART console
@@ -90,3 +100,9 @@ int print_cpuinfo(void)
 	return 0;
 }
 #endif
+
+#ifdef CONFIG_I2C_MV
+void i2c_clk_enable(void)
+{
+}
+#endif

arch/arm/include/asm/arch-armada100/config.h

@@ -40,5 +40,17 @@
 #define MV_UART_CONSOLE_BASE	ARMD1_UART1_BASE
 #define CONFIG_SYS_NS16550_IER	(1 << 6)	/* Bit 6 in UART_IER register
 						represents UART Unit Enable */
+/*
+ * I2C definition
+ */
+#ifdef CONFIG_CMD_I2C
+#define CONFIG_I2C_MV		1
+#define CONFIG_MV_I2C_NUM	2
+#define CONFIG_I2C_MULTI_BUS	1
+#define CONFIG_MV_I2C_REG	{0xd4011000, 0xd4025000}
+#define CONFIG_HARD_I2C		1
+#define CONFIG_SYS_I2C_SPEED	0
+#define CONFIG_SYS_I2C_SLAVE	0xfe
+#endif
 
 #endif /* _ARMD1_CONFIG_H */

arch/arm/include/asm/arch-armada100/mfp.h

@@ -37,28 +37,32 @@
  * 				    offset, pull,pF, drv,dF, edge,eF ,afn,aF
  */
 /* UART1 */
-#define MFP107_UART1_TXD	MFP_REG(0x01ac) | MFP_AF1 | MFP_DRIVE_FAST
-#define MFP107_UART1_RXD	MFP_REG(0x01ac) | MFP_AF2 | MFP_DRIVE_FAST
-#define MFP108_UART1_RXD	MFP_REG(0x01b0) | MFP_AF1 | MFP_DRIVE_FAST
-#define MFP108_UART1_TXD	MFP_REG(0x01b0) | MFP_AF2 | MFP_DRIVE_FAST
-#define MFP109_UART1_CTS	MFP_REG(0x01b4) | MFP_AF1 | MFP_DRIVE_MEDIUM
-#define MFP109_UART1_RTS	MFP_REG(0x01b4) | MFP_AF2 | MFP_DRIVE_MEDIUM
-#define MFP110_UART1_RTS	MFP_REG(0x01b8) | MFP_AF1 | MFP_DRIVE_MEDIUM
-#define MFP110_UART1_CTS	MFP_REG(0x01b8) | MFP_AF2 | MFP_DRIVE_MEDIUM
-#define MFP111_UART1_RI		MFP_REG(0x01bc) | MFP_AF1 | MFP_DRIVE_MEDIUM
-#define MFP111_UART1_DSR	MFP_REG(0x01bc) | MFP_AF2 | MFP_DRIVE_MEDIUM
-#define MFP112_UART1_DTR	MFP_REG(0x01c0) | MFP_AF1 | MFP_DRIVE_MEDIUM
-#define MFP112_UART1_DCD	MFP_REG(0x01c0) | MFP_AF2 | MFP_DRIVE_MEDIUM
+#define MFP107_UART1_TXD	(MFP_REG(0x01ac) | MFP_AF1 | MFP_DRIVE_FAST)
+#define MFP107_UART1_RXD	(MFP_REG(0x01ac) | MFP_AF2 | MFP_DRIVE_FAST)
+#define MFP108_UART1_RXD	(MFP_REG(0x01b0) | MFP_AF1 | MFP_DRIVE_FAST)
+#define MFP108_UART1_TXD	(MFP_REG(0x01b0) | MFP_AF2 | MFP_DRIVE_FAST)
+#define MFP109_UART1_CTS	(MFP_REG(0x01b4) | MFP_AF1 | MFP_DRIVE_MEDIUM)
+#define MFP109_UART1_RTS	(MFP_REG(0x01b4) | MFP_AF2 | MFP_DRIVE_MEDIUM)
+#define MFP110_UART1_RTS	(MFP_REG(0x01b8) | MFP_AF1 | MFP_DRIVE_MEDIUM)
+#define MFP110_UART1_CTS	(MFP_REG(0x01b8) | MFP_AF2 | MFP_DRIVE_MEDIUM)
+#define MFP111_UART1_RI		(MFP_REG(0x01bc) | MFP_AF1 | MFP_DRIVE_MEDIUM)
+#define MFP111_UART1_DSR	(MFP_REG(0x01bc) | MFP_AF2 | MFP_DRIVE_MEDIUM)
+#define MFP112_UART1_DTR	(MFP_REG(0x01c0) | MFP_AF1 | MFP_DRIVE_MEDIUM)
+#define MFP112_UART1_DCD	(MFP_REG(0x01c0) | MFP_AF2 | MFP_DRIVE_MEDIUM)
 
 /* UART2 */
-#define MFP47_UART2_RXD		MFP_REG(0x0028) | MFP_AF6 | MFP_DRIVE_MEDIUM
-#define MFP48_UART2_TXD		MFP_REG(0x002c) | MFP_AF6 | MFP_DRIVE_MEDIUM
-#define MFP88_UART2_RXD		MFP_REG(0x0160) | MFP_AF2 | MFP_DRIVE_MEDIUM
-#define MFP89_UART2_TXD		MFP_REG(0x0164) | MFP_AF2 | MFP_DRIVE_MEDIUM
+#define MFP47_UART2_RXD		(MFP_REG(0x0028) | MFP_AF6 | MFP_DRIVE_MEDIUM)
+#define MFP48_UART2_TXD		(MFP_REG(0x002c) | MFP_AF6 | MFP_DRIVE_MEDIUM)
+#define MFP88_UART2_RXD		(MFP_REG(0x0160) | MFP_AF2 | MFP_DRIVE_MEDIUM)
+#define MFP89_UART2_TXD		(MFP_REG(0x0164) | MFP_AF2 | MFP_DRIVE_MEDIUM)
 
 /* UART3 */
-#define MFPO8_UART3_RXD		MFP_REG(0x06c) | MFP_AF2 | MFP_DRIVE_MEDIUM
-#define MFPO9_UART3_TXD		MFP_REG(0x070) | MFP_AF2 | MFP_DRIVE_MEDIUM
+#define MFPO8_UART3_RXD		(MFP_REG(0x06c) | MFP_AF2 | MFP_DRIVE_MEDIUM)
+#define MFPO9_UART3_TXD		(MFP_REG(0x070) | MFP_AF2 | MFP_DRIVE_MEDIUM)
+
+/* I2c */
+#define MFP105_CI2C_SDA		(MFP_REG(0x1a4) | MFP_AF1 | MFP_DRIVE_MEDIUM)
+#define MFP106_CI2C_SCL		(MFP_REG(0x1a8) | MFP_AF1 | MFP_DRIVE_MEDIUM)
 
 /* More macros can be defined here... */
 

board/Marvell/aspenite/aspenite.c

@@ -33,9 +33,14 @@ DECLARE_GLOBAL_DATA_PTR;
 int board_early_init_f(void)
 {
 	u32 mfp_cfg[] = {
+		/* I2C */
+		MFP105_CI2C_SDA,
+		MFP106_CI2C_SCL,
+
 		/* Enable Console on UART1 */
 		MFP107_UART1_RXD,
 		MFP108_UART1_TXD,
+
 		MFP_EOC		/*End of configureation*/
 	};
 	/* configure MFP's */

include/configs/aspenite.h

@@ -52,6 +52,7 @@
  */
 #define CONFIG_SYS_NO_FLASH		/* Declare no flash (NOR/SPI) */
 #include <config_cmd_default.h>
+#define CONFIG_CMD_I2C
 #define CONFIG_CMD_AUTOSCRIPT
 #undef CONFIG_CMD_NET
 #undef CONFIG_CMD_NFS