[wilink8-wlan/build-utilites.git] / patches / kernel_patches / imx-3.14.28 / 0010-mmc-Add-SDIO-function-devicetree-subnode-parsing.patch
diff --git a/patches/kernel_patches/imx-3.14.28/0010-mmc-Add-SDIO-function-devicetree-subnode-parsing.patch b/patches/kernel_patches/imx-3.14.28/0010-mmc-Add-SDIO-function-devicetree-subnode-parsing.patch
--- /dev/null
+++ b/patches/kernel_patches/imx-3.14.28/0010-mmc-Add-SDIO-function-devicetree-subnode-parsing.patch
@@ -0,0 +1,152 @@
+From f7411890987cd0d0bd33b2fc86ebe34bddd81847 Mon Sep 17 00:00:00 2001
+From: Sascha Hauer <s.hauer@pengutronix.de>
+Date: Mon, 30 Jun 2014 11:07:25 +0200
+Subject: [PATCH 10/10] mmc: Add SDIO function devicetree subnode parsing
+
+This adds SDIO devicetree subnode parsing to the mmc core. While
+SDIO devices are runtime probable they sometimes need nonprobable
+additional information on embedded systems, like an additional gpio
+interrupt or a clock. This patch makes it possible to supply this
+information from the devicetree. SDIO drivers will find a pointer
+to the devicenode in their devices of_node pointer.
+
+Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
+[hdegoede@redhat.com: Misc. cleanups]
+Signed-off-by: Hans de Goede <hdegoede@redhat.com>
+Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
+---
+ drivers/mmc/core/bus.c | 4 ++++
+ drivers/mmc/core/core.c | 28 ++++++++++++++++++++++++++++
+ drivers/mmc/core/core.h | 3 +++
+ drivers/mmc/core/sdio_bus.c | 11 +++++++++++
+ 4 files changed, 46 insertions(+)
+
+diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c
+index 64145a3..0c431a2 100644
+--- a/drivers/mmc/core/bus.c
++++ b/drivers/mmc/core/bus.c
+@@ -16,6 +16,7 @@
+ #include <linux/err.h>
+ #include <linux/slab.h>
+ #include <linux/stat.h>
++#include <linux/of.h>
+ #include <linux/pm_runtime.h>
+
+ #include <linux/mmc/card.h>
+@@ -367,6 +368,8 @@ int mmc_add_card(struct mmc_card *card)
+ #endif
+ mmc_init_context_info(card->host);
+
++ card->dev.of_node = mmc_of_find_child_device(card->host, 0);
++
+ ret = device_add(&card->dev);
+ if (ret)
+ return ret;
+@@ -395,6 +398,7 @@ void mmc_remove_card(struct mmc_card *card)
+ mmc_hostname(card->host), card->rca);
+ }
+ device_del(&card->dev);
++ of_node_put(card->dev.of_node);
+ }
+
+ put_device(&card->dev);
+diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
+index e65a857..769d7a9 100644
+--- a/drivers/mmc/core/core.c
++++ b/drivers/mmc/core/core.c
+@@ -1217,6 +1217,34 @@ EXPORT_SYMBOL(mmc_of_parse_voltage);
+
+ #endif /* CONFIG_OF */
+
++static int mmc_of_get_func_num(struct device_node *node)
++{
++ u32 reg;
++ int ret;
++
++ ret = of_property_read_u32(node, "reg", ®);
++ if (ret < 0)
++ return ret;
++
++ return reg;
++}
++
++struct device_node *mmc_of_find_child_device(struct mmc_host *host,
++ unsigned func_num)
++{
++ struct device_node *node;
++
++ if (!host->parent || !host->parent->of_node)
++ return NULL;
++
++ for_each_child_of_node(host->parent->of_node, node) {
++ if (mmc_of_get_func_num(node) == func_num)
++ return node;
++ }
++
++ return NULL;
++}
++
+ #ifdef CONFIG_REGULATOR
+
+ /**
+diff --git a/drivers/mmc/core/core.h b/drivers/mmc/core/core.h
+index 443a584..f712f6e 100644
+--- a/drivers/mmc/core/core.h
++++ b/drivers/mmc/core/core.h
+@@ -32,6 +32,9 @@ struct mmc_bus_ops {
+ void mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops);
+ void mmc_detach_bus(struct mmc_host *host);
+
++struct device_node *mmc_of_find_child_device(struct mmc_host *host,
++ unsigned func_num);
++
+ void mmc_init_erase(struct mmc_card *card);
+
+ void mmc_set_chip_select(struct mmc_host *host, int mode);
+diff --git a/drivers/mmc/core/sdio_bus.c b/drivers/mmc/core/sdio_bus.c
+index 92d1ba8..35c23ae 100644
+--- a/drivers/mmc/core/sdio_bus.c
++++ b/drivers/mmc/core/sdio_bus.c
+@@ -21,7 +21,9 @@
+ #include <linux/mmc/card.h>
+ #include <linux/mmc/host.h>
+ #include <linux/mmc/sdio_func.h>
++#include <linux/of.h>
+
++#include "core.h"
+ #include "sdio_cis.h"
+ #include "sdio_bus.h"
+
+@@ -314,6 +316,13 @@ static void sdio_acpi_set_handle(struct sdio_func *func)
+ static inline void sdio_acpi_set_handle(struct sdio_func *func) {}
+ #endif
+
++static void sdio_set_of_node(struct sdio_func *func)
++{
++ struct mmc_host *host = func->card->host;
++
++ func->dev.of_node = mmc_of_find_child_device(host, func->num);
++}
++
+ /*
+ * Register a new SDIO function with the driver model.
+ */
+@@ -323,6 +332,7 @@ int sdio_add_func(struct sdio_func *func)
+
+ dev_set_name(&func->dev, "%s:%d", mmc_card_id(func->card), func->num);
+
++ sdio_set_of_node(func);
+ sdio_acpi_set_handle(func);
+ ret = device_add(&func->dev);
+ if (ret == 0) {
+@@ -346,6 +356,7 @@ void sdio_remove_func(struct sdio_func *func)
+
+ acpi_dev_pm_detach(&func->dev, false);
+ device_del(&func->dev);
++ of_node_put(func->dev.of_node);
+ put_device(&func->dev);
+ }
+
+--
+1.7.9.5
+