diff options
Diffstat (limited to 'target/linux/mvebu/patches-3.8/008-mmc_mvsdio_implement_a_device_tree_binding.patch')
-rw-r--r-- | target/linux/mvebu/patches-3.8/008-mmc_mvsdio_implement_a_device_tree_binding.patch | 186 |
1 files changed, 0 insertions, 186 deletions
diff --git a/target/linux/mvebu/patches-3.8/008-mmc_mvsdio_implement_a_device_tree_binding.patch b/target/linux/mvebu/patches-3.8/008-mmc_mvsdio_implement_a_device_tree_binding.patch deleted file mode 100644 index baec5a1467..0000000000 --- a/target/linux/mvebu/patches-3.8/008-mmc_mvsdio_implement_a_device_tree_binding.patch +++ /dev/null @@ -1,186 +0,0 @@ -From patchwork Wed Jan 16 13:13:59 2013 -Content-Type: text/plain; charset="utf-8" -MIME-Version: 1.0 -Content-Transfer-Encoding: 7bit -Subject: [4/5] mmc: mvsdio: implement a Device Tree binding -Date: Wed, 16 Jan 2013 13:13:59 -0000 -From: Andrew Lunn <andrew@lunn.ch> -X-Patchwork-Id: 1987921 -Message-Id: <1358342040-7130-5-git-send-email-andrew@lunn.ch> -To: Jason Cooper <jason@lakedaemon.net> -Cc: linux ARM <linux-arm-kernel@lists.infradead.org>, - linux-mmc@vger.kernel.org, linux@arm.linux.org.uk, - Thomas Petazzoni <thomas.petazzoni@free-electrons.com>, - Andrew Lunn <andrew@lunn.ch> - -From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> - -This patch adds a simple Device Tree binding for the mvsdio driver, as -well as the necessary documentation for it. Compatibility with non-DT -platforms is preserved, by keeping the platform_data based -initialization. - -We introduce a small difference between non-DT and DT platforms: DT -platforms are required to provide a clocks = <...> property, which the -driver uses to get the frequency of the clock that goes to the SDIO -IP. The behaviour on non-DT platforms is kept unchanged: a clock -reference is not mandatory, but the clock frequency must be passed in -the "clock" field of the mvsdio_platform_data structure. - -Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> -Signed-off-by: Andrew Lunn <andrew@lunn.ch> -Tested-by: Stefan Peter <s.peter@mpl.ch> -Tested-by: Florian Fainelli <florian@openwrt.org> -Signed-off-by: Jason Cooper <jason@lakedaemon.net> - ---- -.../devicetree/bindings/mmc/orion-sdio.txt | 17 ++++++ - drivers/mmc/host/mvsdio.c | 62 +++++++++++++++----- - 2 files changed, 64 insertions(+), 15 deletions(-) - create mode 100644 Documentation/devicetree/bindings/mmc/orion-sdio.txt - ---- /dev/null -+++ b/Documentation/devicetree/bindings/mmc/orion-sdio.txt -@@ -0,0 +1,17 @@ -+* Marvell orion-sdio controller -+ -+This file documents differences between the core properties in mmc.txt -+and the properties used by the orion-sdio driver. -+ -+- compatible: Should be "marvell,orion-sdio" -+- clocks: reference to the clock of the SDIO interface -+ -+Example: -+ -+ mvsdio@d00d4000 { -+ compatible = "marvell,orion-sdio"; -+ reg = <0xd00d4000 0x200>; -+ interrupts = <54>; -+ clocks = <&gateclk 17>; -+ status = "disabled"; -+ }; ---- a/drivers/mmc/host/mvsdio.c -+++ b/drivers/mmc/host/mvsdio.c -@@ -21,6 +21,8 @@ - #include <linux/irq.h> - #include <linux/clk.h> - #include <linux/gpio.h> -+#include <linux/of_gpio.h> -+#include <linux/of_irq.h> - #include <linux/mmc/host.h> - #include <linux/mmc/slot-gpio.h> - -@@ -681,17 +683,17 @@ mv_conf_mbus_windows(struct mvsd_host *h - - static int __init mvsd_probe(struct platform_device *pdev) - { -+ struct device_node *np = pdev->dev.of_node; - struct mmc_host *mmc = NULL; - struct mvsd_host *host = NULL; -- const struct mvsdio_platform_data *mvsd_data; - const struct mbus_dram_target_info *dram; - struct resource *r; - int ret, irq; -+ int gpio_card_detect, gpio_write_protect; - - r = platform_get_resource(pdev, IORESOURCE_MEM, 0); - irq = platform_get_irq(pdev, 0); -- mvsd_data = pdev->dev.platform_data; -- if (!r || irq < 0 || !mvsd_data) -+ if (!r || irq < 0) - return -ENXIO; - - mmc = mmc_alloc_host(sizeof(struct mvsd_host), &pdev->dev); -@@ -703,8 +705,37 @@ static int __init mvsd_probe(struct plat - host = mmc_priv(mmc); - host->mmc = mmc; - host->dev = &pdev->dev; -- host->base_clock = mvsd_data->clock / 2; -- host->clk = ERR_PTR(-EINVAL); -+ -+ /* Some non-DT platforms do not pass a clock, and the clock -+ frequency is passed through platform_data. On DT platforms, -+ a clock must always be passed, even if there is no gatable -+ clock associated to the SDIO interface (it can simply be a -+ fixed rate clock). */ -+ host->clk = devm_clk_get(&pdev->dev, NULL); -+ if (!IS_ERR(host->clk)) -+ clk_prepare_enable(host->clk); -+ -+ if (np) { -+ if (IS_ERR(host->clk)) { -+ dev_err(&pdev->dev, "DT platforms must have a clock associated\n"); -+ ret = -EINVAL; -+ goto out; -+ } -+ -+ host->base_clock = clk_get_rate(host->clk) / 2; -+ gpio_card_detect = of_get_named_gpio(np, "cd-gpios", 0); -+ gpio_write_protect = of_get_named_gpio(np, "wp-gpios", 0); -+ } else { -+ const struct mvsdio_platform_data *mvsd_data; -+ mvsd_data = pdev->dev.platform_data; -+ if (!mvsd_data) { -+ ret = -ENXIO; -+ goto out; -+ } -+ host->base_clock = mvsd_data->clock / 2; -+ gpio_card_detect = mvsd_data->gpio_card_detect; -+ gpio_write_protect = mvsd_data->gpio_write_protect; -+ } - - mmc->ops = &mvsd_ops; - -@@ -743,20 +774,14 @@ static int __init mvsd_probe(struct plat - goto out; - } - -- /* Not all platforms can gate the clock, so it is not -- an error if the clock does not exists. */ -- host->clk = devm_clk_get(&pdev->dev, NULL); -- if (!IS_ERR(host->clk)) -- clk_prepare_enable(host->clk); -- -- if (gpio_is_valid(mvsd_data->gpio_card_detect)) { -- ret = mmc_gpio_request_cd(mmc, mvsd_data->gpio_card_detect); -+ if (gpio_is_valid(gpio_card_detect)) { -+ ret = mmc_gpio_request_cd(mmc, gpio_card_detect); - if (ret) - goto out; - } else - mmc->caps |= MMC_CAP_NEEDS_POLL; - -- mmc_gpio_request_ro(mmc, mvsd_data->gpio_write_protect); -+ mmc_gpio_request_ro(mmc, gpio_write_protect); - - setup_timer(&host->timer, mvsd_timeout_timer, (unsigned long)host); - platform_set_drvdata(pdev, mmc); -@@ -768,7 +793,7 @@ static int __init mvsd_probe(struct plat - mmc_hostname(mmc), DRIVER_NAME); - if (!(mmc->caps & MMC_CAP_NEEDS_POLL)) - printk("using GPIO %d for card detection\n", -- mvsd_data->gpio_card_detect); -+ gpio_card_detect); - else - printk("lacking card detect (fall back to polling)\n"); - return 0; -@@ -832,12 +857,19 @@ static int mvsd_resume(struct platform_d - #define mvsd_resume NULL - #endif - -+static const struct of_device_id mvsdio_dt_ids[] = { -+ { .compatible = "marvell,orion-sdio" }, -+ { /* sentinel */ } -+}; -+MODULE_DEVICE_TABLE(of, mvsdio_dt_ids); -+ - static struct platform_driver mvsd_driver = { - .remove = __exit_p(mvsd_remove), - .suspend = mvsd_suspend, - .resume = mvsd_resume, - .driver = { - .name = DRIVER_NAME, -+ .of_match_table = mvsdio_dt_ids, - }, - }; - |