Subject: [PATCH 6.2/7] MMC: mmci: Enable Device Tree support for ux500

From: [email-masked] (Lee Jones)
Date: Thu, 03 May 2012 17:38:59 +0100

On 03/05/12 17:30, Russell King - ARM Linux wrote:
> On Thu, May 03, 2012 at 04:30:48PM +0100, Lee Jones wrote:
>> From: Lee Jones<[email-masked]>
>> Date: Mon, 16 Apr 2012 10:18:43 +0100
>> Subject: [PATCH 01/19] MMC: mmci: Enable Device Tree support for ux500
>>   variants
>>
>> Provide a means to collect attributes specific to ST-Ericsson's
>> ux500 variant series. This patch registers itself as the AMBA
>> driver to be called during the probe process. Once all
>> attributes and ux500 specifics are are collected the normal
>> mmci core probe is called.
>>
>> Acked-by: Linus Walleij<[email-masked]>
>> Acked-by: Arnd Bergmann<[email-masked]>
>> Signed-off-by: Lee Jones<[email-masked]>
>
> This looks fine now, thanks.

Thanks for taking the time to do this Russell.

Would you be kind enough to cast your eye over the documentation patch 
as well please? I believe Chris is waiting on an Ack from you before he 
will pull it.

[PATCH 7/7] MMC: mmci: Add required documentation for Device Tree bindings

Chris, will you also take this one through your tree?

>> ---
>>   drivers/mmc/host/mmci.c |   62 ++++++++++++++++++++++++++++++++++++++++++++---
>>   1 file changed, 59 insertions(+), 3 deletions(-)
>>
>> diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
>> index 032b847..c2bd5ea 100644
>> --- a/drivers/mmc/host/mmci.c
>> +++ b/drivers/mmc/host/mmci.c
>> @@ -15,6 +15,7 @@
>>   #include<linux/device.h>
>>   #include<linux/interrupt.h>
>>   #include<linux/kernel.h>
>> +#include<linux/slab.h>
>>   #include<linux/delay.h>
>>   #include<linux/err.h>
>>   #include<linux/highmem.h>
>> @@ -1196,21 +1197,76 @@ static const struct mmc_host_ops mmci_ops = {
>>   	.get_cd		= mmci_get_cd,
>>   };
>>
>> +#ifdef CONFIG_OF
>> +static void mmci_dt_populate_generic_pdata(struct device_node *np,
>> +					struct mmci_platform_data *pdata)
>> +{
>> +	int bus_width = 0;
>> +
>> +	of_property_read_u32(np, "wp-gpios",&pdata->gpio_wp);
>> +	if (!pdata->gpio_wp)
>> +		pdata->gpio_wp = -1;
>> +
>> +	of_property_read_u32(np, "cd-gpios",&pdata->gpio_cd);
>> +	if (!pdata->gpio_cd)
>> +		pdata->gpio_cd = -1;
>> +
>> +	if (of_get_property(np, "cd-inverted", NULL))
>> +		pdata->cd_invert = true;
>> +	else
>> +		pdata->cd_invert = false;
>> +
>> +	of_property_read_u32(np, "max-frequency",&pdata->f_max);
>> +	if (!pdata->f_max)
>> +		pr_warn("%s has no 'max-frequency' property\n", np->full_name);
>> +
>> +	if (of_get_property(np, "mmc-cap-mmc-highspeed", NULL))
>> +		pdata->capabilities |= MMC_CAP_MMC_HIGHSPEED;
>> +	if (of_get_property(np, "mmc-cap-sd-highspeed", NULL))
>> +		pdata->capabilities |= MMC_CAP_SD_HIGHSPEED;
>> +
>> +	of_property_read_u32(np, "bus-width",&bus_width);
>> +	switch (bus_width) {
>> +	case 0 :
>> +		/* No bus-width supplied. */
>> +		break;
>> +	case 4 :
>> +		pdata->capabilities |= MMC_CAP_4_BIT_DATA;
>> +		break;
>> +	case 8 :
>> +		pdata->capabilities |= MMC_CAP_8_BIT_DATA;
>> +		break;
>> +	default :
>> +		pr_warn("%s: Unsupported bus width\n", np->full_name);
>> +	}
>> +}
>> +#endif
>> +
>>   static int __devinit mmci_probe(struct amba_device *dev,
>>   	const struct amba_id *id)
>>   {
>>   	struct mmci_platform_data *plat = dev->dev.platform_data;
>> +	struct device_node *np = dev->dev.of_node;
>>   	struct variant_data *variant = id->data;
>>   	struct mmci_host *host;
>>   	struct mmc_host *mmc;
>>   	int ret;
>>
>> -	/* must have platform data */
>> +	/* Must have platform data or Device Tree. */
>> +	if (!plat&&  !np) {
>> +		dev_err(&dev->dev, "No plat data or DT found\n");
>> +		return -EINVAL;
>> +	}
>> +
>>   	if (!plat) {
>> -		ret = -EINVAL;
>> -		goto out;
>> +		plat = devm_kzalloc(&dev->dev, sizeof(*plat), GFP_KERNEL);
>> +		if (!plat)
>> +			return -ENOMEM;
>>   	}
>>
>> +	if (np)
>> +		mmci_dt_populate_generic_pdata(np, plat);
>> +
>>   	ret = amba_request_regions(dev, DRIVER_NAME);
>>   	if (ret)
>>   		goto out;
>> --
>> 1.7.9.5

-- 
Lee Jones
Linaro ST-Ericsson Landing Team Lead
M: +44 77 88 633 515
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