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

Lee Jones
2012-05-03T16:38:59Z

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<lee.jones@linaro.org>
>> 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<linus.walleij@linaro.org>
>> Acked-by: Arnd Bergmann<arnd@arndb.de>
>> Signed-off-by: Lee Jones<lee.jones@linaro.org>
>
> 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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