Hi Prakash, I think this looks pretty good now :)
Reviewed-by: Mark Rutland <[email protected]> Thanks, Mark. On Tue, Feb 12, 2013 at 06:37:36AM +0000, Manjunathappa, Prakash wrote: > Adds device tree support for davinci_mmc. Also add binding documentation. > As of now in non-dma PIO mode and without GPIO card_detect/write_protect > option because of dependencies on EDMA and GPIO module DT support. > > Signed-off-by: Manjunathappa, Prakash <[email protected]> > Cc: [email protected] > Cc: [email protected] > Cc: [email protected] > Cc: [email protected] > Cc: [email protected] > Cc: Sekhar Nori <[email protected]> > Cc: [email protected] > --- > Since v2: > Modified the default value for bus-width and removed the support for > highspeed card capabilties for now. > Since v1: > Modified DT parse function to take default values and accomodate controller > version in compatible field. > > .../devicetree/bindings/mmc/davinci_mmc.txt | 25 ++++++++ > drivers/mmc/host/davinci_mmc.c | 65 > +++++++++++++++++++- > 2 files changed, 88 insertions(+), 2 deletions(-) > create mode 100644 Documentation/devicetree/bindings/mmc/davinci_mmc.txt > > diff --git a/Documentation/devicetree/bindings/mmc/davinci_mmc.txt > b/Documentation/devicetree/bindings/mmc/davinci_mmc.txt > new file mode 100644 > index 0000000..247be0f > --- /dev/null > +++ b/Documentation/devicetree/bindings/mmc/davinci_mmc.txt > @@ -0,0 +1,25 @@ > +* TI Highspeed MMC host controller for DaVinci > + > +The Highspeed MMC Host Controller on TI DaVinci family > +provides an interface for MMC, SD and SDIO types of memory cards. > + > +This file documents the properties used by the davinci_mmc driver. > + > +Required properties: > +- compatible: > + Should be "ti,davinci-mmc-da830": for da830, da850, dm365 > + Should be "ti,davinci-mmc-dm355": for dm355, dm644x > + > +Optional properties: > +- bus-width: Number of data lines, can be <1>, <4>, or <8>, default <1> > +- max-frequency: Maximum operating clock frequency, default 25MHz. > + > +Example: > + mmc0: mmc@1c40000 { > + compatible = "ti,davinci-mmc-da830", > + reg = <0x40000 0x1000>; > + interrupts = <16>; > + status = "okay"; > + bus-width = <4>; > + max-frequency = <50000000>; > + }; > diff --git a/drivers/mmc/host/davinci_mmc.c b/drivers/mmc/host/davinci_mmc.c > index 27123f8..66ca6bf 100644 > --- a/drivers/mmc/host/davinci_mmc.c > +++ b/drivers/mmc/host/davinci_mmc.c > @@ -34,6 +34,8 @@ > #include <linux/dma-mapping.h> > #include <linux/edma.h> > #include <linux/mmc/mmc.h> > +#include <linux/of.h> > +#include <linux/of_device.h> > > #include <linux/platform_data/mmc-davinci.h> > > @@ -1157,16 +1159,74 @@ static void __init init_mmcsd_host(struct > mmc_davinci_host *host) > mmc_davinci_reset_ctrl(host, 0); > } > > -static int __init davinci_mmcsd_probe(struct platform_device *pdev) > +static const struct of_device_id davinci_mmc_dt_ids[] = { > + { > + .compatible = "ti,davinci-mmc-dm355", > + .data = (void *)MMC_CTLR_VERSION_1, > + }, > + { > + .compatible = "ti,davinci-mmc-da830", > + .data = (void *)MMC_CTLR_VERSION_2, > + }, > + {}, > +}; > +MODULE_DEVICE_TABLE(of, davinci_mmc_dt_ids); > + > +static struct davinci_mmc_config > + *mmc_parse_pdata(struct platform_device *pdev) > { > + struct device_node *np; > struct davinci_mmc_config *pdata = pdev->dev.platform_data; > + const struct of_device_id *match = > + of_match_device(of_match_ptr(davinci_mmc_dt_ids), &pdev->dev); > + u32 data; > + > + np = pdev->dev.of_node; > + if (!np) > + return pdata; > + > + pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); > + if (!pdata) { > + dev_err(&pdev->dev, "Failed to allocate memory for struct > davinci_mmc_config\n"); > + goto nodata; > + } > + > + if (match->data) > + pdata->version = (u8)((int)match->data); > + > + of_property_read_u32(np, "max-frequency", &pdata->max_freq); > + if (!pdata->max_freq) > + dev_info(&pdev->dev, "'max-frequency' property not specified, > defaulting to 25MHz\n"); > + > + of_property_read_u32(np, "bus-width", &data); > + switch (data) { > + case 1: > + case 4: > + case 8: > + pdata->wires = data; > + break; > + default: > + pdata->wires = 1; > + dev_info(&pdev->dev, "Unsupported buswidth, defaulting to 1 > bit\n"); > + } > +nodata: > + return pdata; > +} > + > +static int __init davinci_mmcsd_probe(struct platform_device *pdev) > +{ > + struct davinci_mmc_config *pdata = NULL; > struct mmc_davinci_host *host = NULL; > struct mmc_host *mmc = NULL; > struct resource *r, *mem = NULL; > int ret = 0, irq = 0; > size_t mem_size; > > - /* REVISIT: when we're fully converted, fail if pdata is NULL */ > + pdata = mmc_parse_pdata(pdev); > + if (pdata == NULL) { > + dev_err(&pdev->dev, "Can not get platform data\n"); > + return -ENOENT; > + } > > ret = -ENODEV; > r = platform_get_resource(pdev, IORESOURCE_MEM, 0); > @@ -1408,6 +1468,7 @@ static struct platform_driver davinci_mmcsd_driver = { > .name = "davinci_mmc", > .owner = THIS_MODULE, > .pm = davinci_mmcsd_pm_ops, > + .of_match_table = of_match_ptr(davinci_mmc_dt_ids), > }, > .remove = __exit_p(davinci_mmcsd_remove), > }; > -- > 1.7.4.1 > > _______________________________________________ > devicetree-discuss mailing list > [email protected] > https://lists.ozlabs.org/listinfo/devicetree-discuss > _______________________________________________ devicetree-discuss mailing list [email protected] https://lists.ozlabs.org/listinfo/devicetree-discuss
