Commit f0e46cc4 authored by Philipp Zabel's avatar Philipp Zabel Committed by Pierre Ossman
Browse files

MFD,mmc: tmio_mmc: make HCLK configurable 



The Toshiba parts all have a 24 MHz HCLK, but HTC ASIC3 has a 24.576 MHz HCLK
and AMD Imageon w228x's HCLK is 80 MHz. With this patch, the MFD driver
provides the HCLK frequency to tmio_mmc via mfd_cell->driver_data.

Signed-off-by: default avatarPhilipp Zabel <philipp.zabel@gmail.com>
Acked-by: default avatarIan Molton <ian@mnementh.co.uk>
Acked-by: default avatarSamuel Ortiz <sameo@openedhand.com>
Signed-off-by: default avatarPierre Ossman <pierre@ossman.eu>
parent fdd858db

drivers/mfd/t7l66xb.c

+5 −0
Original line number Diff line number Diff line
@@ -108,6 +108,10 @@ static int t7l66xb_mmc_disable(struct platform_device *mmc) 


/*--------------------------------------------------------------------------*/



static const struct tmio_mmc_data t7166xb_mmc_data = {

	.hclk = 24000000,

};



static const struct resource t7l66xb_mmc_resources[] = {

	{

		.start = 0x800,
@@ -149,6 +153,7 @@ static struct mfd_cell t7l66xb_cells[] = { 
		.name = "tmio-mmc",

		.enable = t7l66xb_mmc_enable,

		.disable = t7l66xb_mmc_disable,

		.driver_data = &t7166xb_mmc_data,

		.num_resources = ARRAY_SIZE(t7l66xb_mmc_resources),

		.resources = t7l66xb_mmc_resources,

	},

drivers/mfd/tc6387xb.c

+5 −0
Original line number Diff line number Diff line
@@ -75,6 +75,10 @@ static int tc6387xb_mmc_disable(struct platform_device *mmc) 


/*--------------------------------------------------------------------------*/



const static struct tmio_mmc_data tc6387xb_mmc_data = {

	.hclk = 24000000,

};



static struct resource tc6387xb_mmc_resources[] = {

	{

		.start = 0x800,
@@ -98,6 +102,7 @@ static struct mfd_cell tc6387xb_cells[] = { 
		.name = "tmio-mmc",

		.enable = tc6387xb_mmc_enable,

		.disable = tc6387xb_mmc_disable,

		.driver_data = &tc6387xb_mmc_data,

		.num_resources = ARRAY_SIZE(tc6387xb_mmc_resources),

		.resources = tc6387xb_mmc_resources,

	},

drivers/mfd/tc6393xb.c

+5 −0
Original line number Diff line number Diff line
@@ -136,6 +136,10 @@ static int tc6393xb_nand_enable(struct platform_device *nand) 
	return 0;

}



const static struct tmio_mmc_data tc6393xb_mmc_data = {

	.hclk = 24000000,

};



static struct resource __devinitdata tc6393xb_nand_resources[] = {

	{

		.start	= 0x1000,
@@ -351,6 +355,7 @@ static struct mfd_cell __devinitdata tc6393xb_cells[] = { 
	},

	[TC6393XB_CELL_MMC] = {

		.name = "tmio-mmc",

		.driver_data = &tc6393xb_mmc_data,

		.num_resources = ARRAY_SIZE(tc6393xb_mmc_resources),

		.resources = tc6393xb_mmc_resources,

	},

drivers/mmc/host/tmio_mmc.c

+11 −13
Original line number Diff line number Diff line
@@ -35,23 +35,14 @@ 


#include "tmio_mmc.h"



/*

 * Fixme - documentation conflicts on what the clock values are for the

 * various dividers.

 * One document I have says that its a divisor of a 24MHz clock, another 33.

 * This probably depends on HCLK for a given platform, so we may need to

 * require HCLK be passed to us from the MFD core.

 *

 */



static void tmio_mmc_set_clock(struct tmio_mmc_host *host, int new_clock)

{

	void __iomem *cnf = host->cnf;

	void __iomem *ctl = host->ctl;

	u32 clk = 0, clock;

	u32 clk = 0, clock, f_min = host->mmc->f_min;



	if (new_clock) {

		for (clock = 46875, clk = 0x100; new_clock >= (clock<<1); ) {

		for (clock = f_min, clk = 0x100; new_clock >= (clock<<1); ) {

			clock <<= 1;

			clk >>= 1;

		}
@@ -545,6 +536,7 @@ out: 
static int __devinit tmio_mmc_probe(struct platform_device *dev)

{

	struct mfd_cell	*cell = (struct mfd_cell *)dev->dev.platform_data;

	struct tmio_mmc_data *pdata;

	struct resource *res_ctl, *res_cnf;

	struct tmio_mmc_host *host;

	struct mmc_host *mmc;
@@ -560,6 +552,12 @@ static int __devinit tmio_mmc_probe(struct platform_device *dev) 
		goto out;

	}



	pdata = cell->driver_data;

	if (!pdata || !pdata->hclk) {

		ret = -EINVAL;

		goto out;

	}



	mmc = mmc_alloc_host(sizeof(struct tmio_mmc_host), &dev->dev);

	if (!mmc)

		goto out;
@@ -578,8 +576,8 @@ static int __devinit tmio_mmc_probe(struct platform_device *dev) 


	mmc->ops = &tmio_mmc_ops;

	mmc->caps = MMC_CAP_4_BIT_DATA;

	mmc->f_min = 46875; /* 24000000 / 512 */

	mmc->f_max = 24000000;

	mmc->f_max = pdata->hclk;

	mmc->f_min = mmc->f_max / 512;

	mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;



	/* Enable the MMC/SD Control registers */

include/linux/mfd/tmio.h

+7 −0
Original line number Diff line number Diff line
@@ -18,6 +18,13 @@ 
	writew((val) >> 16, (addr) + 2); \

	} while (0)



/*

 * data for the MMC controller

 */

struct tmio_mmc_data {

	unsigned int		hclk;

};



/*

 * data for the NAND controller

 */

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