[U-Boot] [PATCH 4/5] mxc_i2c: add support for MX53 processor

[Heiko Schocher]

Hello Jason,

Jason Liu wrote:
> This patch add I2C support for Freescale MX53 processor
> 
> Signed-off-by: Jason Liu <r64343 at freescale.com>
> ---
>  drivers/i2c/mxc_i2c.c |   18 +++++++++++++-----
>  1 files changed, 13 insertions(+), 5 deletions(-)
>  mode change 100644 => 100755 drivers/i2c/mxc_i2c.c
> 
> diff --git a/drivers/i2c/mxc_i2c.c b/drivers/i2c/mxc_i2c.c
> old mode 100644
> new mode 100755
> index 8e10fbb..f9f32cc
> --- a/drivers/i2c/mxc_i2c.c
> +++ b/drivers/i2c/mxc_i2c.c
> @@ -24,10 +24,11 @@
>  
>  #include <common.h>
>  
> -#if defined(CONFIG_HARD_I2C)
> +#if defined(CONFIG_MX53)
> +#include <asm/arch/clock.h>
> +#endif
>  
> -#include <asm/arch/mx31.h>
> -#include <asm/arch/mx31-regs.h>

Why do you delete this includes? That will break mx31 boards.
Please add instead a

#if defined(CONFIG_MX31) around it

> +#if defined(CONFIG_HARD_I2C)

Why you move this define here?

>  #define IADR	0x00
>  #define IFDR	0x04
> @@ -56,8 +57,10 @@
>  #elif defined (CONFIG_SYS_I2C_MX31_PORT3)
>  #define I2C_BASE	0x43f84000
>  #define I2C_CLK_OFFSET	30
> +#elif defined(CONFIG_SYS_I2C_PORT)
> +#define I2C_BASE CONFIG_SYS_I2C_PORT
>  #else
> -#error "define CONFIG_SYS_I2C_MX31_PORTx to use the mx31 I2C driver"
> +#error "define CONFIG_SYS_I2C_PORT to use the I2C driver"

This error message will be not correct on mx31 based boards,
as they have to define CONFIG_SYS_I2C_MX31_PORTx, please correct.

>  #endif
>  
>  #ifdef DEBUG
> @@ -72,11 +75,16 @@ 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;
>  
> +#ifdef 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)

bye,
Heiko
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