Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 75fb0aae authored by Xiubo Li's avatar Xiubo Li Committed by Mark Brown
Browse files

regmap: mmio: Add regmap_mmio_get_min_stride 



Splite the minimal stride parsing into one signal function.

Signed-off-by: default avatarXiubo Li <lixiubo@cmss.chinamobile.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 9d98fa71

drivers/base/regmap/regmap-mmio.c

+30 −19
Original line number Diff line number Diff line
@@ -61,6 +61,33 @@ static int regmap_mmio_regbits_check(size_t reg_bits) 
	}

}



static int regmap_mmio_get_min_stride(size_t val_bits)

{

	int min_stride;



	switch (val_bits) {

	case 8:

		/* The core treats 0 as 1 */

		min_stride = 0;

		return 0;

	case 16:

		min_stride = 2;

		break;

	case 32:

		min_stride = 4;

		break;

#ifdef CONFIG_64BIT

	case 64:

		min_stride = 8;

		break;

#endif

	default:

		return -EINVAL;

	}



	return min_stride;

}



static inline void regmap_mmio_count_check(size_t count, u32 offset)

{

	BUG_ON(count <= offset);
@@ -231,25 +258,9 @@ static struct regmap_mmio_context *regmap_mmio_gen_context(struct device *dev, 
	if (config->pad_bits)

		return ERR_PTR(-EINVAL);



	switch (config->val_bits) {

	case 8:

		/* The core treats 0 as 1 */

		min_stride = 0;

		break;

	case 16:

		min_stride = 2;

		break;

	case 32:

		min_stride = 4;

		break;

#ifdef CONFIG_64BIT

	case 64:

		min_stride = 8;

		break;

#endif

	default:

		return ERR_PTR(-EINVAL);

	}

	min_stride = regmap_mmio_get_min_stride(config->val_bits);

	if (min_stride < 0)

		return ERR_PTR(min_stride);



	if (config->reg_stride < min_stride)

		return ERR_PTR(-EINVAL);