diff options
Diffstat (limited to 'target/linux/sunxi/patches-3.18/200-mmc-add-sdio-function-subnode.patch')
| -rw-r--r-- | target/linux/sunxi/patches-3.18/200-mmc-add-sdio-function-subnode.patch | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/target/linux/sunxi/patches-3.18/200-mmc-add-sdio-function-subnode.patch b/target/linux/sunxi/patches-3.18/200-mmc-add-sdio-function-subnode.patch new file mode 100644 index 0000000000..6427df5cc1 --- /dev/null +++ b/target/linux/sunxi/patches-3.18/200-mmc-add-sdio-function-subnode.patch @@ -0,0 +1,148 @@ +From 8c2057afe84c074ef7cd3ee2ec8e9bed835b9e93 Mon Sep 17 00:00:00 2001 +From: Sascha Hauer <s.hauer@pengutronix.de> +Date: Wed, 21 May 2014 19:50:04 +0200 +Subject: [PATCH] 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> +--- + 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 8a1f124..7868565 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> +@@ -352,6 +353,8 @@ 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; +@@ -380,6 +383,7 @@ 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 f26a5f1..7f7f66c 100644 +--- a/drivers/mmc/core/core.c ++++ b/drivers/mmc/core/core.c +@@ -1205,6 +1205,34 @@ 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 443a5846..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 6da97b1..f63223a 100644 +--- a/drivers/mmc/core/sdio_bus.c ++++ b/drivers/mmc/core/sdio_bus.c +@@ -22,7 +22,9 @@ + #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" + +@@ -303,6 +305,13 @@ 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. + */ +@@ -312,6 +321,7 @@ 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) { +@@ -335,6 +345,7 @@ void sdio_remove_func(struct sdio_func *func) + + dev_pm_domain_detach(&func->dev, false); + device_del(&func->dev); ++ of_node_put(func->dev.of_node); + put_device(&func->dev); + } + |