Subject: Re: [PATCH v2 1/3] i2c-mpc: use __devinit[data] for initialization functions and data

From: Ben Dooks <[email-masked]>
Date: Tue, 26 Jan 2010 14:35:07 +0000

On Mon, Jan 25, 2010 at 09:55:04PM +0100, Wolfgang Grandegger wrote:
> From: Wolfgang Grandegger <[email-masked]>
> 
> "__devinit[data]" has not yet been used for all initialization functions
> and data. To avoid truncating lines, the struct mpc_i2c_match_data has
> been renamed to mpc_i2c_data, which is even the better name.
> 
> Signed-off-by: Wolfgang Grandegger <[email-masked]>
> ---
>  drivers/i2c/busses/i2c-mpc.c |   99 +++++++++++++++++++----------------------
>  1 files changed, 46 insertions(+), 53 deletions(-)
> 
> diff --git a/drivers/i2c/busses/i2c-mpc.c b/drivers/i2c/busses/i2c-mpc.c
> index f627001..2cb864e 100644
> --- a/drivers/i2c/busses/i2c-mpc.c
> +++ b/drivers/i2c/busses/i2c-mpc.c
> @@ -66,7 +66,7 @@ struct mpc_i2c_divider {
>  	u16 fdr;	/* including dfsrr */
>  };
>  
> -struct mpc_i2c_match_data {
> +struct mpc_i2c_data {
>  	void (*setclock)(struct device_node *node,
>  			 struct mpc_i2c *i2c,
>  			 u32 clock, u32 prescaler);
> @@ -165,7 +165,7 @@ static int i2c_wait(struct mpc_i2c *i2c, unsigned timeout, int writing)
>  }
>  
>  #ifdef CONFIG_PPC_MPC52xx
> -static const struct mpc_i2c_divider mpc_i2c_dividers_52xx[] = {
> +static const struct __devinitdata mpc_i2c_divider mpc_i2c_dividers_52xx[] = {
>  	{20, 0x20}, {22, 0x21}, {24, 0x22}, {26, 0x23},
>  	{28, 0x24}, {30, 0x01}, {32, 0x25}, {34, 0x02},
>  	{36, 0x26}, {40, 0x27}, {44, 0x04}, {48, 0x28},
> @@ -186,7 +186,8 @@ static const struct mpc_i2c_divider mpc_i2c_dividers_52xx[] = {
>  	{10240, 0x9d}, {12288, 0x9e}, {15360, 0x9f}
>  };
>  
> -int mpc_i2c_get_fdr_52xx(struct device_node *node, u32 clock, int prescaler)
> +static int __devinit mpc_i2c_get_fdr_52xx(struct device_node *node, u32 clock,
> +					  int prescaler)
>  {
>  	const struct mpc_i2c_divider *div = NULL;
>  	unsigned int pvr = mfspr(SPRN_PVR);
> @@ -215,9 +216,9 @@ int mpc_i2c_get_fdr_52xx(struct device_node *node, u32 clock, int prescaler)
>  	return div ? (int)div->fdr : -EINVAL;
>  }
>  
> -static void mpc_i2c_setclock_52xx(struct device_node *node,
> -				  struct mpc_i2c *i2c,
> -				  u32 clock, u32 prescaler)
> +static void __devinit mpc_i2c_setclock_52xx(struct device_node *node,
> +					    struct mpc_i2c *i2c,
> +					    u32 clock, u32 prescaler)
>  {
>  	int ret, fdr;
>  
> @@ -230,15 +231,15 @@ static void mpc_i2c_setclock_52xx(struct device_node *node,
>  		dev_info(i2c->dev, "clock %d Hz (fdr=%d)\n", clock, fdr);
>  }
>  #else /* !CONFIG_PPC_MPC52xx */
> -static void mpc_i2c_setclock_52xx(struct device_node *node,
> -				  struct mpc_i2c *i2c,
> -				  u32 clock, u32 prescaler)
> +static void __devinit mpc_i2c_setclock_52xx(struct device_node *node,
> +					    struct mpc_i2c *i2c,
> +					    u32 clock, u32 prescaler)
>  {
>  }
>  #endif /* CONFIG_PPC_MPC52xx*/
>  
>  #ifdef CONFIG_FSL_SOC
> -static const struct mpc_i2c_divider mpc_i2c_dividers_8xxx[] = {
> +static const struct __devinitdata mpc_i2c_divider mpc_i2c_dividers_8xxx[] = {
>  	{160, 0x0120}, {192, 0x0121}, {224, 0x0122}, {256, 0x0123},
>  	{288, 0x0100}, {320, 0x0101}, {352, 0x0601}, {384, 0x0102},
>  	{416, 0x0602}, {448, 0x0126}, {480, 0x0103}, {512, 0x0127},
> @@ -258,7 +259,7 @@ static const struct mpc_i2c_divider mpc_i2c_dividers_8xxx[] = {
>  	{49152, 0x011e}, {61440, 0x011f}
>  };
>  
> -u32 mpc_i2c_get_sec_cfg_8xxx(void)
> +static u32 __devinit mpc_i2c_get_sec_cfg_8xxx(void)
>  {
>  	struct device_node *node = NULL;
>  	u32 __iomem *reg;
> @@ -287,7 +288,8 @@ u32 mpc_i2c_get_sec_cfg_8xxx(void)
>  	return val;
>  }
>  
> -int mpc_i2c_get_fdr_8xxx(struct device_node *node, u32 clock, u32 prescaler)
> +static int __devinit mpc_i2c_get_fdr_8xxx(struct device_node *node, u32 clock,
> +					  u32 prescaler)
>  {
>  	const struct mpc_i2c_divider *div = NULL;
>  	u32 divider;
> @@ -320,9 +322,9 @@ int mpc_i2c_get_fdr_8xxx(struct device_node *node, u32 clock, u32 prescaler)
>  	return div ? (int)div->fdr : -EINVAL;
>  }
>  
> -static void mpc_i2c_setclock_8xxx(struct device_node *node,
> -				  struct mpc_i2c *i2c,
> -				  u32 clock, u32 prescaler)
> +static void __devinit mpc_i2c_setclock_8xxx(struct device_node *node,
> +					    struct mpc_i2c *i2c,
> +					    u32 clock, u32 prescaler)
>  {
>  	int ret, fdr;
>  
> @@ -338,9 +340,9 @@ static void mpc_i2c_setclock_8xxx(struct device_node *node,
>  }
>  
>  #else /* !CONFIG_FSL_SOC */
> -static void mpc_i2c_setclock_8xxx(struct device_node *node,
> -				  struct mpc_i2c *i2c,
> -				  u32 clock, u32 prescaler)
> +static void __devinit mpc_i2c_setclock_8xxx(struct device_node *node,
> +					    struct mpc_i2c *i2c,
> +					    u32 clock, u32 prescaler)
>  {
>  }
>  #endif /* CONFIG_FSL_SOC */
> @@ -529,8 +531,8 @@ static int __devinit fsl_i2c_probe(struct of_device *op,
>  			clock = *prop;
>  
>  		if (match->data) {
> -			struct mpc_i2c_match_data *data =
> -				(struct mpc_i2c_match_data *)match->data;
> +			struct mpc_i2c_data *data =
> +				(struct mpc_i2c_data *)match->data;
>  			data->setclock(op->node, i2c, clock, data->prescaler);
>  		} else {
>  			/* Backwards compatibility */
> @@ -582,44 +584,35 @@ static int __devexit fsl_i2c_remove(struct of_device *op)
>  	return 0;
>  };
>  
> +static struct mpc_i2c_data __devinitdata mpc_i2c_data_52xx = {
> +	.setclock = mpc_i2c_setclock_52xx,
> +};
> +
> +static struct mpc_i2c_data __devinitdata mpc_i2c_data_8313 = {
> +	.setclock = mpc_i2c_setclock_8xxx,
> +};
> +
> +static struct mpc_i2c_data __devinitdata mpc_i2c_data_8543 = {
> +	.setclock = mpc_i2c_setclock_8xxx,
> +	.prescaler = 2,
> +};
> +
> +static struct mpc_i2c_data __devinitdata mpc_i2c_data_8544 = {
> +	.setclock = mpc_i2c_setclock_8xxx,
> +	.prescaler = 3,
> +};
> +
>  static const struct of_device_id mpc_i2c_of_match[] = {
> -	{.compatible = "mpc5200-i2c",
> -	 .data = &(struct mpc_i2c_match_data) {
> -			.setclock = mpc_i2c_setclock_52xx,
> -		},
> -	},
> -	{.compatible = "fsl,mpc5200b-i2c",
> -	 .data = &(struct mpc_i2c_match_data) {
> -			.setclock = mpc_i2c_setclock_52xx,
> -		},
> -	},
> -	{.compatible = "fsl,mpc5200-i2c",
> -	 .data = &(struct mpc_i2c_match_data) {
> -			.setclock = mpc_i2c_setclock_52xx,
> -		},
> -	},
> -	{.compatible = "fsl,mpc8313-i2c",
> -	 .data = &(struct mpc_i2c_match_data) {
> -			.setclock = mpc_i2c_setclock_8xxx,
> -		},
> -	},
> -	{.compatible = "fsl,mpc8543-i2c",
> -	 .data = &(struct mpc_i2c_match_data) {
> -			.setclock = mpc_i2c_setclock_8xxx,
> -			.prescaler = 2,
> -		},
> -	},
> -	{.compatible = "fsl,mpc8544-i2c",
> -	 .data = &(struct mpc_i2c_match_data) {
> -			.setclock = mpc_i2c_setclock_8xxx,
> -			.prescaler = 3,
> -		},
> +	{.compatible = "mpc5200-i2c", .data = &mpc_i2c_data_52xx, },
> +	{.compatible = "fsl,mpc5200b-i2c", .data = &mpc_i2c_data_52xx, },
> +	{.compatible = "fsl,mpc5200-i2c", .data = &mpc_i2c_data_52xx, },
> +	{.compatible = "fsl,mpc8313-i2c", .data = &mpc_i2c_data_8313, },
> +	{.compatible = "fsl,mpc8543-i2c", .data = &mpc_i2c_data_8543, },
> +	{.compatible = "fsl,mpc8544-i2c", .data = &mpc_i2c_data_8544, },
>  	/* Backward compatibility */
> -	},
>  	{.compatible = "fsl-i2c", },
>  	{},
>  };

Any particular reason you decided to move this all about?

Are you sure that __devinitdata is the right thing here, I've no idea
if there is currently any hotplug type support for openfirmware or
not.

-- 
Ben ([email-masked], http://www.fluff.org/)

  'a smiley only costs 4 bytes'