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authorLei Wen <[leiwen@marvell.com]>2011-04-13 23:48:34 +0530
committerAlbert ARIBAUD <albert.u.boot@aribaud.net>2011-04-27 19:38:08 +0200
commitaa3b168e317d7eb86968f60fcf105a3cb409bee5 (patch)
tree67a6e9a5e3d2d22cfead0e3ec6102bbee9aadf62 /arch/arm
parent3df619ec2cae3305c20b808c4d49cfed66c1cf9b (diff)
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I2C: add i2c support for Pantheon platform
Add i2c support to dkb board with pantheon soc. Acked-by: Heiko Schocher <hs@denx.de> Acked-by: Prafulla Wadaskar <prafulla@marvell.com> Signed-off-by: Lei Wen <leiwen@marvell.com>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/cpu/arm926ejs/pantheon/cpu.c12
-rw-r--r--arch/arm/include/asm/arch-pantheon/config.h10
-rw-r--r--arch/arm/include/asm/arch-pantheon/cpu.h4
-rw-r--r--arch/arm/include/asm/arch-pantheon/mfp.h6
4 files changed, 29 insertions, 3 deletions
diff --git a/arch/arm/cpu/arm926ejs/pantheon/cpu.c b/arch/arm/cpu/arm926ejs/pantheon/cpu.c
index 9ddc77c..8b2eafa 100644
--- a/arch/arm/cpu/arm926ejs/pantheon/cpu.c
+++ b/arch/arm/cpu/arm926ejs/pantheon/cpu.c
@@ -59,6 +59,12 @@ int arch_cpu_init(void)
/* Enable GPIO clock */
writel(APBC_APBCLK, &apbclkres->gpio);
+#ifdef CONFIG_I2C_MV
+ /* Enable I2C clock */
+ writel(APBC_RST | APBC_FNCLK | APBC_APBCLK, &apbclkres->twsi);
+ writel(APBC_FNCLK | APBC_APBCLK, &apbclkres->twsi);
+#endif
+
icache_enable();
return 0;
@@ -76,3 +82,9 @@ int print_cpuinfo(void)
return 0;
}
#endif
+
+#ifdef CONFIG_I2C_MV
+void i2c_clk_enable(void)
+{
+}
+#endif
diff --git a/arch/arm/include/asm/arch-pantheon/config.h b/arch/arm/include/asm/arch-pantheon/config.h
index 710b386..5658592 100644
--- a/arch/arm/include/asm/arch-pantheon/config.h
+++ b/arch/arm/include/asm/arch-pantheon/config.h
@@ -34,5 +34,15 @@
#define MV_UART_CONSOLE_BASE PANTHEON_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_REG 0xd4011000
+#define CONFIG_HARD_I2C 1
+#define CONFIG_SYS_I2C_SPEED 0
+#define CONFIG_SYS_I2C_SLAVE 0xfe
+#endif
#endif /* _PANTHEON_CONFIG_H */
diff --git a/arch/arm/include/asm/arch-pantheon/cpu.h b/arch/arm/include/asm/arch-pantheon/cpu.h
index 30f4393..60955c5 100644
--- a/arch/arm/include/asm/arch-pantheon/cpu.h
+++ b/arch/arm/include/asm/arch-pantheon/cpu.h
@@ -50,7 +50,9 @@ struct panthapb_registers {
u32 uart0; /*0x000*/
u32 uart1; /*0x004*/
u32 gpio; /*0x008*/
- u8 pad0[0x034 - 0x08 - 4];
+ u8 pad0[0x02c - 0x08 - 4];
+ u32 twsi; /*0x02c*/
+ u8 pad1[0x034 - 0x2c - 4];
u32 timers; /*0x034*/
};
diff --git a/arch/arm/include/asm/arch-pantheon/mfp.h b/arch/arm/include/asm/arch-pantheon/mfp.h
index fb291cf..e939196 100644
--- a/arch/arm/include/asm/arch-pantheon/mfp.h
+++ b/arch/arm/include/asm/arch-pantheon/mfp.h
@@ -32,8 +32,10 @@
* offset, pull,pF, drv,dF, edge,eF ,afn,aF
*/
/* UART2 */
-#define MFP47_UART2_RXD MFP_REG(0x198) | MFP_AF6 | MFP_DRIVE_MEDIUM
-#define MFP48_UART2_TXD MFP_REG(0x19c) | MFP_AF6 | MFP_DRIVE_MEDIUM
+#define MFP47_UART2_RXD (MFP_REG(0x198) | MFP_AF6 | MFP_DRIVE_MEDIUM)
+#define MFP48_UART2_TXD (MFP_REG(0x19c) | MFP_AF6 | MFP_DRIVE_MEDIUM)
+#define MFP53_CI2C_SCL (MFP_REG(0x1b0) | MFP_AF2 | MFP_DRIVE_MEDIUM)
+#define MFP54_CI2C_SDA (MFP_REG(0x1b4) | MFP_AF2 | MFP_DRIVE_MEDIUM)
/* More macros can be defined here... */