On Wed, Mar 14, 2012 at 03:23:43PM +0800, Jean-Christophe PLAGNIOL-VILLARD wrote: > On 16:47 Tue 13 Mar , Dong Aisheng wrote: > > From: Dong Aisheng <[email protected]> > > > > Signed-off-by: Dong Aisheng <[email protected]> > > > > --- > > The patch is still using a private way for dma part binding > > since the common dma binding is still under discussion. > > http://www.spinics.net/lists/linux-omap/msg65528.html > > > > Will update to use common dma binding when it hits mainline. > > --- > > .../devicetree/bindings/mmc/fsl-mxs-mmc.txt | 23 ++++++ > > drivers/mmc/host/mxs-mmc.c | 82 > > +++++++++++++++++++- > > 2 files changed, 102 insertions(+), 3 deletions(-) > > > > diff --git a/Documentation/devicetree/bindings/mmc/fsl-mxs-mmc.txt > > b/Documentation/devicetree/bindings/mmc/fsl-mxs-mmc.txt > > new file mode 100644 > > index 0000000..adc1142 > > --- /dev/null > > +++ b/Documentation/devicetree/bindings/mmc/fsl-mxs-mmc.txt > > @@ -0,0 +1,23 @@ > > +* FREESCALE MXS MMC peripheral > > + > > +Required properties: > > +- compatible : Should be "fsl,<chip>-mmc" > > +- reg : Should contain registers location and length > > +- interrupts : Should contain interrupt. > > + The format is <irq_err irq_dma>. > > +- dma_channel: Should contain the dma channel it uses > > + > > +Optional properties: > > +- wp-gpios : Specify GPIOs for write protection > > +- slot-4bit: Specify 4 bit mode support > > +- slot-8bit: Specify 8 bit and 4 bit mode support > > + > > +Examples: > > +mmc1: ssp@80010000 { > > + compatible = "fsl,imx28-mmc"; > > + reg = <0x80010000 2000>; > > + /* <irq_err irq_dma> */ > > + interrupts = <96 82>; > > + dma_channel = <0>; > > + slot-8bit; > > +}; > > diff --git a/drivers/mmc/host/mxs-mmc.c b/drivers/mmc/host/mxs-mmc.c > > index 382c835..6cf2d17 100644 > > --- a/drivers/mmc/host/mxs-mmc.c > > +++ b/drivers/mmc/host/mxs-mmc.c > > @@ -38,6 +38,10 @@ > > #include <linux/gpio.h> > > #include <linux/regulator/consumer.h> > > #include <linux/module.h> > > +#include <linux/of.h> > > +#include <linux/of_device.h> > > +#include <linux/of_gpio.h> > > +#include <linux/slab.h> > > > > #include <mach/mxs.h> > > #include <mach/common.h> > > @@ -673,17 +677,79 @@ static bool mxs_mmc_dma_filter(struct dma_chan *chan, > > void *param) > > return true; > > } > > > > +#ifdef CONFIG_OF > > +static struct resource * __devinit mxs_mmc_get_of_dmares( > > + struct platform_device *pdev) > > +{ > > + struct device_node *np = pdev->dev.of_node; > > + struct resource *dmares; > > + int ret; > > + > > + if (!np) > > + return NULL; > > + > > + dmares = kzalloc(sizeof(*dmares), GFP_KERNEL); > > + dmares->flags = IORESOURCE_DMA; > > + ret = of_property_read_u32(np, "dma_channel", &dmares->start); > > + if (ret) { > > + dev_err(&pdev->dev, "unable to get dmares from dt\n"); > > + return NULL; > > + } > > + dmares->end = dmares->start; > > + > > + return dmares; > > +} > > + > > +static int __devinit mxs_mmc_get_of_property(struct platform_device *pdev, > > + struct mxs_mmc_platform_data **ppdata) > > +{ > > + struct device_node *np = pdev->dev.of_node; > > + struct mxs_mmc_platform_data *pdata = *ppdata; > > + > > + if (!np) > > + return -ENODEV; > > + > > + pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); > > + > > + if (of_get_property(np, "slot-8bit", NULL)) > > + pdata->flags |= SLOTF_8_BIT_CAPABLE; > > + > > + if (of_get_property(np, "slot-4bit", NULL)) > > + pdata->flags |= SLOTF_4_BIT_CAPABLE; > it will conflit if both binding are set use a number instead > Hmm, i did not see conflict, can you explain more? The "slot-8bit" includes the support for 4bit.(see binding doc) Even user define them two property in dt by mistake, it does not cause conflict. See: if (pdata) { if (pdata->flags & SLOTF_8_BIT_CAPABLE) mmc->caps |= MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA; if (pdata->flags & SLOTF_4_BIT_CAPABLE) mmc->caps |= MMC_CAP_4_BIT_DATA; }
Regards Dong Aisheng _______________________________________________ devicetree-discuss mailing list [email protected] https://lists.ozlabs.org/listinfo/devicetree-discuss
