diff options
| author | Albert ARIBAUD \(3ADEV\) | 2015-03-31 11:40:45 +0200 |
|---|---|---|
| committer | Albert ARIBAUD | 2015-04-10 14:23:07 +0200 |
| commit | 5e862b95399e6e5ea7748ee29a38756685d622fd (patch) | |
| tree | 030286526ba8325c0df98b1f4a2f8c60a034a4c1 /arch | |
| parent | c8381bf435ddb104594df00411a8ebd049dd753c (diff) | |
lpc32xx: i2c: add LPC32xx I2C interface support
Signed-off-by: Albert ARIBAUD (3ADEV) <albert.aribaud@3adev.fr>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/cpu/arm926ejs/lpc32xx/devices.c | 11 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-lpc32xx/clk.h | 4 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-lpc32xx/cpu.h | 2 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-lpc32xx/sys_proto.h | 1 |
4 files changed, 18 insertions, 0 deletions
diff --git a/arch/arm/cpu/arm926ejs/lpc32xx/devices.c b/arch/arm/cpu/arm926ejs/lpc32xx/devices.c index be4c93deb20..81b53eaa6de 100644 --- a/arch/arm/cpu/arm926ejs/lpc32xx/devices.c +++ b/arch/arm/cpu/arm926ejs/lpc32xx/devices.c @@ -50,3 +50,14 @@ void lpc32xx_mlc_nand_init(void) /* Enable NAND interface */ writel(CLK_NAND_MLC | CLK_NAND_MLC_INT, &clk->flashclk_ctrl); } + +void lpc32xx_i2c_init(unsigned int devnum) +{ + /* Enable I2C interface */ + uint32_t ctrl = readl(&clk->i2cclk_ctrl); + if (devnum == 1) + ctrl |= CLK_I2C1_ENABLE; + if (devnum == 2) + ctrl |= CLK_I2C2_ENABLE; + writel(ctrl, &clk->i2cclk_ctrl); +} diff --git a/arch/arm/include/asm/arch-lpc32xx/clk.h b/arch/arm/include/asm/arch-lpc32xx/clk.h index bc7d33da013..781ac071036 100644 --- a/arch/arm/include/asm/arch-lpc32xx/clk.h +++ b/arch/arm/include/asm/arch-lpc32xx/clk.h @@ -123,6 +123,10 @@ struct clk_pm_regs { #define CLK_MAC_SLAVE (1 << 1) #define CLK_MAC_REG (1 << 0) +/* I2C Clock Control Register bits */ +#define CLK_I2C2_ENABLE (1 << 1) +#define CLK_I2C1_ENABLE (1 << 0) + /* Timer Clock Control1 Register bits */ #define CLK_TIMCLK_MOTOR (1 << 6) #define CLK_TIMCLK_TIMER3 (1 << 5) diff --git a/arch/arm/include/asm/arch-lpc32xx/cpu.h b/arch/arm/include/asm/arch-lpc32xx/cpu.h index 199b4a026b9..1067107b644 100644 --- a/arch/arm/include/asm/arch-lpc32xx/cpu.h +++ b/arch/arm/include/asm/arch-lpc32xx/cpu.h @@ -37,6 +37,8 @@ #define UART4_BASE 0x40088000 /* UART 4 registers base */ #define UART5_BASE 0x40090000 /* UART 5 registers base */ #define UART6_BASE 0x40098000 /* UART 6 registers base */ +#define I2C1_BASE 0x400A0000 /* I2C 1 registers base */ +#define I2C2_BASE 0x400A8000 /* I2C 2 registers base */ /* External SDRAM Memory Bank base addresses */ #define EMC_DYCS0_BASE 0x80000000 /* SDRAM DYCS0 base address */ diff --git a/arch/arm/include/asm/arch-lpc32xx/sys_proto.h b/arch/arm/include/asm/arch-lpc32xx/sys_proto.h index 0c4e712a06a..a4a05d1ea40 100644 --- a/arch/arm/include/asm/arch-lpc32xx/sys_proto.h +++ b/arch/arm/include/asm/arch-lpc32xx/sys_proto.h @@ -10,5 +10,6 @@ void lpc32xx_uart_init(unsigned int uart_id); void lpc32xx_mac_init(void); void lpc32xx_mlc_nand_init(void); +void lpc32xx_i2c_init(unsigned int devnum); #endif /* _LPC32XX_SYS_PROTO_H */ |