From mboxrd@z Thu Jan 1 00:00:00 1970 From: lee.jones@linaro.org (Lee Jones) Date: Thu, 03 May 2012 16:03:34 +0100 Subject: [PATCH 6.2/7] MMC: mmci: Enable Device Tree support for ux500 In-Reply-To: <20120425185747.GC24211@n2100.arm.linux.org.uk> References: <1334325909-5779-1-git-send-email-lee.jones@linaro.org> <1334325909-5779-7-git-send-email-lee.jones@linaro.org> <4F8BE5B0.4000900@linaro.org> <20120425185747.GC24211@n2100.arm.linux.org.uk> Message-ID: <4FA29E46.6040204@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Here you are Russell. Sorry for the delay. From: Lee Jones 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 Acked-by: Arnd Bergmann Signed-off-by: Lee Jones --- drivers/mmc/host/mmci.c | 68 ++++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 64 insertions(+), 4 deletions(-) diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c index 032b847..23764ec 100644 --- a/drivers/mmc/host/mmci.c +++ b/drivers/mmc/host/mmci.c @@ -15,6 +15,7 @@ #include #include #include +#include #include #include #include @@ -1196,21 +1197,77 @@ 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; + int ret, freeplat = 0; + + /* Must have platform data or Device Tree. */ + if (!plat && !np) { + dev_err(&dev->dev, "No plat data or DT found\n"); + return -EINVAL; + } - /* must have platform data */ if (!plat) { - ret = -EINVAL; - goto out; + plat = kzalloc(sizeof(*plat), GFP_KERNEL); + if (!plat) + return -ENOMEM; + freeplat = 1; } + if (np) + mmci_dt_populate_generic_pdata(np, plat); + ret = amba_request_regions(dev, DRIVER_NAME); if (ret) goto out; @@ -1448,6 +1505,9 @@ static int __devinit mmci_probe(struct amba_device *dev, rel_regions: amba_release_regions(dev); out: + if (freeplat) + kfree(plat); + return ret; } -- 1.7.9.5