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mxc_i2c: add support for MX53 processor

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This patch add I2C support for Freescale MX53 processor

Signed-off-by: Jason Liu <r64343@freescale.com>
This commit is contained in:
Liu Hui-R64343 2011-01-03 22:27:39 +00:00 committed by Albert Aribaud
parent 01643ec180
commit 127cec1889
1 changed files with 18 additions and 3 deletions
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21
drivers/i2c/mxc_i2c.c
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@ -26,8 +26,14 @@
#if defined(CONFIG_HARD_I2C)
#if defined(CONFIG_MX31)
#include <asm/arch/mx31.h>
#include <asm/arch/mx31-regs.h>
#endif
#if defined(CONFIG_MX53)
#include <asm/arch/clock.h>
#endif
#define IADR 0x00
#define IFDR 0x04
@ -47,7 +53,7 @@
#define I2SR_IIF (1 << 1)
#define I2SR_RX_NO_AK (1 << 0)
#ifdef CONFIG_SYS_I2C_MX31_PORT1
#if defined(CONFIG_SYS_I2C_MX31_PORT1)
#define I2C_BASE 0x43f80000
#define I2C_CLK_OFFSET 26
#elif defined (CONFIG_SYS_I2C_MX31_PORT2)
@ -56,8 +62,12 @@
#elif defined (CONFIG_SYS_I2C_MX31_PORT3)
#define I2C_BASE 0x43f84000
#define I2C_CLK_OFFSET 30
#elif defined(CONFIG_SYS_I2C_MX53_PORT1)
#define I2C_BASE I2C1_BASE_ADDR
#elif defined(CONFIG_SYS_I2C_MX53_PORT2)
#define I2C_BASE I2C2_BASE_ADDR
#else
#error "define CONFIG_SYS_I2C_MX31_PORTx to use the mx31 I2C driver"
#error "define CONFIG_SYS_I2C_MXxx_PORTx to use the I2C driver"
#endif
#ifdef DEBUG
@ -72,11 +82,16 @@ static u16 div[] = { 30, 32, 36, 42, 48, 52, 60, 72, 80, 88, 104, 128, 144,
void i2c_init(int speed, int unused)
{
int freq = mx31_get_ipg_clk();
int freq;
int i;
#if defined(CONFIG_MX31)
freq = mx31_get_ipg_clk();
/* start the required I2C clock */
__REG(CCM_CGR0) = __REG(CCM_CGR0) | (3 << I2C_CLK_OFFSET);
#else
freq = mxc_get_clock(MXC_IPG_PERCLK);
#endif
for (i = 0; i < 0x1f; i++)
if (freq / div[i] <= speed)