From 61ee7007a5d61aa066076da578e8e8084e122d7d Mon Sep 17 00:00:00 2001 From: Ohad Ben-Cohen Date: Thu, 16 Sep 2010 01:31:12 +0200 Subject: [PATCH] wl12xx: add platform data passing support Add a simple mechanism to pass platform data to the SDIO instances of wl12xx. This way there is no confusion over who owns the 'embedded data', typechecking is preserved, and no possibility for the wrong driver to pick up the data. Originally proposed by Russell King. Signed-off-by: Ohad Ben-Cohen Signed-off-by: John W. Linville --- drivers/net/wireless/Makefile | 2 ++ drivers/net/wireless/wl12xx/Kconfig | 5 +++- drivers/net/wireless/wl12xx/wl12xx_platform_data.c | 28 ++++++++++++++++++++++ include/linux/wl12xx.h | 3 +++ 4 files changed, 37 insertions(+), 1 deletion(-) create mode 100644 drivers/net/wireless/wl12xx/wl12xx_platform_data.c diff --git a/drivers/net/wireless/Makefile b/drivers/net/wireless/Makefile index 5d4ce4d..85af697 100644 --- a/drivers/net/wireless/Makefile +++ b/drivers/net/wireless/Makefile @@ -50,5 +50,7 @@ obj-$(CONFIG_ATH_COMMON) += ath/ obj-$(CONFIG_MAC80211_HWSIM) += mac80211_hwsim.o obj-$(CONFIG_WL12XX) += wl12xx/ +# small builtin driver bit +obj-$(CONFIG_WL12XX_PLATFORM_DATA) += wl12xx/wl12xx_platform_data.o obj-$(CONFIG_IWM) += iwmc3200wifi/ diff --git a/drivers/net/wireless/wl12xx/Kconfig b/drivers/net/wireless/wl12xx/Kconfig index 2f98058..4a8bb25 100644 --- a/drivers/net/wireless/wl12xx/Kconfig +++ b/drivers/net/wireless/wl12xx/Kconfig @@ -74,4 +74,7 @@ config WL1271_SDIO If you choose to build a module, it'll be called wl1271_sdio. Say N if unsure. - +config WL12XX_PLATFORM_DATA + bool + depends on WL1271_SDIO != n + default y diff --git a/drivers/net/wireless/wl12xx/wl12xx_platform_data.c b/drivers/net/wireless/wl12xx/wl12xx_platform_data.c new file mode 100644 index 0000000..973b110 --- /dev/null +++ b/drivers/net/wireless/wl12xx/wl12xx_platform_data.c @@ -0,0 +1,28 @@ +#include +#include +#include + +static const struct wl12xx_platform_data *platform_data; + +int __init wl12xx_set_platform_data(const struct wl12xx_platform_data *data) +{ + if (platform_data) + return -EBUSY; + if (!data) + return -EINVAL; + + platform_data = kmemdup(data, sizeof(*data), GFP_KERNEL); + if (!platform_data) + return -ENOMEM; + + return 0; +} + +const struct wl12xx_platform_data *wl12xx_get_platform_data(void) +{ + if (!platform_data) + return ERR_PTR(-ENODEV); + + return platform_data; +} +EXPORT_SYMBOL(wl12xx_get_platform_data); diff --git a/include/linux/wl12xx.h b/include/linux/wl12xx.h index 015687a..bd70563 100644 --- a/include/linux/wl12xx.h +++ b/include/linux/wl12xx.h @@ -31,4 +31,7 @@ struct wl12xx_platform_data { bool use_eeprom; }; +int wl12xx_set_platform_data(const struct wl12xx_platform_data *data); +const struct wl12xx_platform_data *wl12xx_get_platform_data(void); + #endif -- 2.7.4