Commit 654166d6 authored by Sascha Hauer's avatar Sascha Hauer
Browse files

mxc: iomux v3: remove resource handling 



The current model does not allow to put a pad into different modes
once a pins is allocated. Remove the resource handling.

Signed-off-by: default avatarSascha Hauer <s.hauer@pengutronix.de>
parent c6e7c0e2

arch/arm/plat-mxc/include/mach/iomux-v3.h

+1 −16
Original line number Diff line number Diff line
@@ -88,9 +88,7 @@ struct pad_desc { 
#define PAD_CTL_SRE_FAST		(1 << 0)



/*

 * setups a single pad:

 * 	- reserves the pad so that it is not claimed by another driver

 * 	- setups the iomux according to the configuration

 * setups a single pad in the iomuxer

 */

int mxc_iomux_v3_setup_pad(struct pad_desc *pad);
@@ -100,19 +98,6 @@ int mxc_iomux_v3_setup_pad(struct pad_desc *pad); 
 */

int mxc_iomux_v3_setup_multiple_pads(struct pad_desc *pad_list, unsigned count);



/*

 * releases a single pad:

 * 	- make it available for a future use by another driver

 * 	- DOES NOT reconfigure the IOMUX in its reset state

 */

void mxc_iomux_v3_release_pad(struct pad_desc *pad);



/*

 * releases multiple pads

 * convenvient way to call the above function with tables

 */

void mxc_iomux_v3_release_multiple_pads(struct pad_desc *pad_list, int count);



/*

 * Initialise the iomux controller

 */

arch/arm/plat-mxc/iomux-v3.c

+2 −34
Original line number Diff line number Diff line
@@ -31,19 +31,11 @@ 


static void __iomem *base;



static unsigned long iomux_v3_pad_alloc_map[0x200 / BITS_PER_LONG];



/*

 * setups a single pin:

 * 	- reserves the pin so that it is not claimed by another driver

 * 	- setups the iomux according to the configuration

 * setups a single pad in the iomuxer

 */

int mxc_iomux_v3_setup_pad(struct pad_desc *pad)

{

	unsigned int pad_ofs = pad->pad_ctrl_ofs;



	if (test_and_set_bit(pad_ofs >> 2, iomux_v3_pad_alloc_map))

		return -EBUSY;

	if (pad->mux_ctrl_ofs)

		__raw_writel(pad->mux_mode, base + pad->mux_ctrl_ofs);
@@ -66,37 +58,13 @@ int mxc_iomux_v3_setup_multiple_pads(struct pad_desc *pad_list, unsigned count) 
	for (i = 0; i < count; i++) {

		ret = mxc_iomux_v3_setup_pad(p);

		if (ret)

			goto setup_error;

			return ret;

		p++;

	}

	return 0;



setup_error:

	mxc_iomux_v3_release_multiple_pads(pad_list, i);

	return ret;

}

EXPORT_SYMBOL(mxc_iomux_v3_setup_multiple_pads);



void mxc_iomux_v3_release_pad(struct pad_desc *pad)

{

	unsigned int pad_ofs = pad->pad_ctrl_ofs;



	clear_bit(pad_ofs >> 2, iomux_v3_pad_alloc_map);

}

EXPORT_SYMBOL(mxc_iomux_v3_release_pad);



void mxc_iomux_v3_release_multiple_pads(struct pad_desc *pad_list, int count)

{

	struct pad_desc *p = pad_list;

	int i;



	for (i = 0; i < count; i++) {

		mxc_iomux_v3_release_pad(p);

		p++;

	}

}

EXPORT_SYMBOL(mxc_iomux_v3_release_multiple_pads);



void mxc_iomux_v3_init(void __iomem *iomux_v3_base)

{

	base = iomux_v3_base;