[U-Boot] [PATCH v2 1/6] Exynos5: Fix compiler warnings due to clock_get_periph_rate

[Jaehoon Chung <jh80.chung@samsung.com>]

Hi,

On 01/15/2015 10:31 PM, Akshay Saraswat wrote:
> Apparently, members of clk_bit_info array do not map correctly
> to the members of enum periph_id. This mapping got broken after
> we changed periph_id(s) to reflect interrupt number instead of
> their position in a sequence. This patch intends to fix above
> mentioned issue.
> 
> Signed-off-by: Akshay Saraswat <akshay.s@samsung.com>
> ---
> Changes since v1:
> 	- Removed exynos5_bit_info array name.
> 
>  arch/arm/cpu/armv7/exynos/clock.c | 81 ++++++++++++++++++++++++---------------
>  1 file changed, 50 insertions(+), 31 deletions(-)
> 
> diff --git a/arch/arm/cpu/armv7/exynos/clock.c b/arch/arm/cpu/armv7/exynos/clock.c
> index b31c13b..519928c 100644
> --- a/arch/arm/cpu/armv7/exynos/clock.c
> +++ b/arch/arm/cpu/armv7/exynos/clock.c
> @@ -20,42 +20,49 @@
>   * positions of the peripheral clocks of the src and div registers
>   */
>  struct clk_bit_info {
> +	enum periph_id id;
>  	int8_t src_bit;
>  	int8_t div_bit;
>  	int8_t prediv_bit;
>  };
>  
> -/* src_bit div_bit prediv_bit */
> +/* periph_id src_bit div_bit prediv_bit */
>  static struct clk_bit_info clk_bit_info[] = {
> -	{0,	0,	-1},
> -	{4,	4,	-1},
> -	{8,	8,	-1},
> -	{12,	12,	-1},
> -	{0,	0,	8},
> -	{4,	16,	24},
> -	{8,	0,	8},
> -	{12,	16,	24},
> -	{-1,	-1,	-1},
> -	{16,	0,	8},
> -	{20,	16,	24},
> -	{24,	0,	8},
> -	{0,	0,	4},
> -	{4,	12,	16},
> -	{-1,	-1,	-1},
> -	{-1,	-1,	-1},
> -	{-1,	24,	0},
> -	{-1,	24,	0},
> -	{-1,	24,	0},
> -	{-1,	24,	0},
> -	{-1,	24,	0},
> -	{-1,	24,	0},
> -	{-1,	24,	0},
> -	{-1,	24,	0},
> -	{24,	0,	-1},
> -	{24,	0,	-1},
> -	{24,	0,	-1},
> -	{24,	0,	-1},
> -	{24,	0,	-1},
> +	{PERIPH_ID_UART0,	0,	0,	-1},
> +	{PERIPH_ID_UART1,	4,	4,	-1},
> +	{PERIPH_ID_UART2,	8,	8,	-1},
> +	{PERIPH_ID_UART3,	12,	12,	-1},
> +	{PERIPH_ID_I2C0,	-1,	24,	0},
> +	{PERIPH_ID_I2C1,	-1,	24,	0},
> +	{PERIPH_ID_I2C2,	-1,	24,	0},
> +	{PERIPH_ID_I2C3,	-1,	24,	0},
> +	{PERIPH_ID_I2C4,	-1,	24,	0},
> +	{PERIPH_ID_I2C5,	-1,	24,	0},
> +	{PERIPH_ID_I2C6,	-1,	24,	0},
> +	{PERIPH_ID_I2C7,	-1,	24,	0},
> +	{PERIPH_ID_SPI0,	16,	0,	8},
> +	{PERIPH_ID_SPI1,	20,	16,	24},
> +	{PERIPH_ID_SPI2,	24,	0,	8},
> +	{PERIPH_ID_SDMMC0,	0,	0,	8},
> +	{PERIPH_ID_SDMMC1,	4,	16,	24},
> +	{PERIPH_ID_SDMMC2,	8,	0,	8},
> +	{PERIPH_ID_SDMMC3,	12,	16,	24},
> +	{PERIPH_ID_I2C8,	-1,	-1,	-1},
> +	{PERIPH_ID_I2C9,	-1,	-1,	-1},
> +	{PERIPH_ID_I2S0,	0,	0,	4},
> +	{PERIPH_ID_I2S1,	4,	12,	16},
> +	{PERIPH_ID_SROMC,	-1,	-1,	-1},
> +	{PERIPH_ID_SPI3,	0,	0,	4},
> +	{PERIPH_ID_SPI4,	4,	12,	16},
> +	{PERIPH_ID_SDMMC4,	16,	0,	8},
> +	{PERIPH_ID_PWM0,	24,	0,	-1},
> +	{PERIPH_ID_PWM1,	24,	0,	-1},
> +	{PERIPH_ID_PWM2,	24,	0,	-1},
> +	{PERIPH_ID_PWM3,	24,	0,	-1},
> +	{PERIPH_ID_PWM4,	24,	0,	-1},
> +	{PERIPH_ID_I2C10,	-1,	-1,	-1},
> +
> +	{PERIPH_ID_NONE,	-1,	-1,	-1},
>  };
>  
>  /* Epll Clock division values to achive different frequency output */
> @@ -260,9 +267,21 @@ static unsigned long exynos5_get_pll_clk(int pllreg)
>  	return fout;
>  }
>  
> +static struct clk_bit_info *get_clk_bit_info(int peripheral)
> +{
> +	int i;
> +
> +	for (i = 0; clk_bit_info[i].id != PERIPH_ID_NONE; i++) {
> +		if (clk_bit_info[i].id == peripheral)
> +			break;
> +	}

If don't match anything, it gets wrong bit_info.
I think good that print the warning message or other.

Best Regards,
Jaehoon Chung

> +
> +	return &clk_bit_info[i];
> +}
> +
>  static unsigned long exynos5_get_periph_rate(int peripheral)
>  {
> -	struct clk_bit_info *bit_info = &clk_bit_info[peripheral];
> +	struct clk_bit_info *bit_info = get_clk_bit_info(peripheral);
>  	unsigned long sclk, sub_clk;
>  	unsigned int src, div, sub_div;
>  	struct exynos5_clock *clk =
>