linux-kernel - RE: [PATCH 4/5] mfd: tps65090: move register access APIs to header

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Date:	Mon, 8 Oct 2012 11:07:10 +0530
From:	Venu Byravarasu <vbyravarasu@...dia.com>
To:	Laxman Dewangan <ldewangan@...dia.com>,
	"sameo@...ux.intel.com" <sameo@...ux.intel.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 4/5] mfd: tps65090: move register access APIs to header

> -----Original Message-----
> From: Laxman Dewangan
> Sent: Sunday, October 07, 2012 8:52 PM
> To: sameo@...ux.intel.com
> Cc: linux-kernel@...r.kernel.org; Venu Byravarasu; Laxman Dewangan
> Subject: [PATCH 4/5] mfd: tps65090: move register access APIs to header
> 
> Since tps65090 register is accessed via regmap, moving
> the register access APIs to header and making it as inline.

Why should we move function implementation to header file? 
Also by making inline, doesn't the output binary size increase?

> 
> Signed-off-by: Laxman Dewangan <ldewangan@...dia.com>
> ---
>  drivers/mfd/tps65090.c       |   34 ----------------------------------
>  include/linux/mfd/tps65090.h |   39
> +++++++++++++++++++++++++++++++++++----
>  2 files changed, 35 insertions(+), 38 deletions(-)
> 
> diff --git a/drivers/mfd/tps65090.c b/drivers/mfd/tps65090.c
> index 3cfc9dc..355a077 100644
> --- a/drivers/mfd/tps65090.c
> +++ b/drivers/mfd/tps65090.c
> @@ -25,7 +25,6 @@
>  #include <linux/i2c.h>
>  #include <linux/mfd/core.h>
>  #include <linux/mfd/tps65090.h>
> -#include <linux/regmap.h>
>  #include <linux/err.h>
> 
>  #define NUM_INT_REG 2
> @@ -78,39 +77,6 @@ static struct mfd_cell tps65090s[] = {
>  	},
>  };
> 
> -int tps65090_write(struct device *dev, int reg, uint8_t val)
> -{
> -	struct tps65090 *tps = dev_get_drvdata(dev);
> -	return regmap_write(tps->rmap, reg, val);
> -}
> -EXPORT_SYMBOL_GPL(tps65090_write);
> -
> -int tps65090_read(struct device *dev, int reg, uint8_t *val)
> -{
> -	struct tps65090 *tps = dev_get_drvdata(dev);
> -	unsigned int temp_val;
> -	int ret;
> -	ret = regmap_read(tps->rmap, reg, &temp_val);
> -	if (!ret)
> -		*val = temp_val;
> -	return ret;
> -}
> -EXPORT_SYMBOL_GPL(tps65090_read);
> -
> -int tps65090_set_bits(struct device *dev, int reg, uint8_t bit_num)
> -{
> -	struct tps65090 *tps = dev_get_drvdata(dev);
> -	return regmap_update_bits(tps->rmap, reg, BIT(bit_num), ~0u);
> -}
> -EXPORT_SYMBOL_GPL(tps65090_set_bits);
> -
> -int tps65090_clr_bits(struct device *dev, int reg, uint8_t bit_num)
> -{
> -	struct tps65090 *tps = dev_get_drvdata(dev);
> -	return regmap_update_bits(tps->rmap, reg, BIT(bit_num), 0u);
> -}
> -EXPORT_SYMBOL_GPL(tps65090_clr_bits);
> -
>  static void tps65090_irq_lock(struct irq_data *data)
>  {
>  	struct tps65090 *tps65090 = irq_data_get_irq_chip_data(data);
> diff --git a/include/linux/mfd/tps65090.h b/include/linux/mfd/tps65090.h
> index 6c57622..1a5f916 100644
> --- a/include/linux/mfd/tps65090.h
> +++ b/include/linux/mfd/tps65090.h
> @@ -23,6 +23,7 @@
>  #define __LINUX_MFD_TPS65090_H
> 
>  #include <linux/irq.h>
> +#include <linux/regmap.h>
> 
>  struct tps65090 {
>  	struct device		*dev;
> @@ -40,9 +41,39 @@ struct tps65090_platform_data {
>   * NOTE: the functions below are not intended for use outside
>   * of the TPS65090 sub-device drivers
>   */
> -extern int tps65090_write(struct device *dev, int reg, uint8_t val);
> -extern int tps65090_read(struct device *dev, int reg, uint8_t *val);
> -extern int tps65090_set_bits(struct device *dev, int reg, uint8_t bit_num);
> -extern int tps65090_clr_bits(struct device *dev, int reg, uint8_t bit_num);
> +static inline int tps65090_write(struct device *dev, int reg, uint8_t val)
> +{
> +	struct tps65090 *tps = dev_get_drvdata(dev);
> +
> +	return regmap_write(tps->rmap, reg, val);
> +}
> +
> +static inline int tps65090_read(struct device *dev, int reg, uint8_t *val)
> +{
> +	struct tps65090 *tps = dev_get_drvdata(dev);
> +	unsigned int temp_val;
> +	int ret;
> +
> +	ret = regmap_read(tps->rmap, reg, &temp_val);
> +	if (!ret)
> +		*val = temp_val;
> +	return ret;
> +}
> +
> +static inline int tps65090_set_bits(struct device *dev, int reg,
> +		uint8_t bit_num)
> +{
> +	struct tps65090 *tps = dev_get_drvdata(dev);
> +
> +	return regmap_update_bits(tps->rmap, reg, BIT(bit_num), ~0u);
> +}
> +
> +static inline int tps65090_clr_bits(struct device *dev, int reg,
> +		uint8_t bit_num)
> +{
> +	struct tps65090 *tps = dev_get_drvdata(dev);
> +
> +	return regmap_update_bits(tps->rmap, reg, BIT(bit_num), 0u);
> +}
> 
>  #endif /*__LINUX_MFD_TPS65090_H */
> --
> 1.7.1.1

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