diff options
| -rw-r--r-- | arch/arm/plat-pxa/ssp.c | 25 | ||||
| -rw-r--r-- | include/linux/pxa2xx_ssp.h | 11 |
2 files changed, 36 insertions, 0 deletions
diff --git a/arch/arm/plat-pxa/ssp.c b/arch/arm/plat-pxa/ssp.c index f2661355fa4e..c83f27b6bdda 100644 --- a/arch/arm/plat-pxa/ssp.c +++ b/arch/arm/plat-pxa/ssp.c @@ -62,6 +62,30 @@ struct ssp_device *pxa_ssp_request(int port, const char *label) } EXPORT_SYMBOL(pxa_ssp_request); +struct ssp_device *pxa_ssp_request_of(const struct device_node *of_node, + const char *label) +{ + struct ssp_device *ssp = NULL; + + mutex_lock(&ssp_lock); + + list_for_each_entry(ssp, &ssp_list, node) { + if (ssp->of_node == of_node && ssp->use_count == 0) { + ssp->use_count++; + ssp->label = label; + break; + } + } + + mutex_unlock(&ssp_lock); + + if (&ssp->node == &ssp_list) + return NULL; + + return ssp; +} +EXPORT_SYMBOL(pxa_ssp_request_of); + void pxa_ssp_free(struct ssp_device *ssp) { mutex_lock(&ssp_lock); @@ -185,6 +209,7 @@ static int pxa_ssp_probe(struct platform_device *pdev) } ssp->use_count = 0; + ssp->of_node = dev->of_node; mutex_lock(&ssp_lock); list_add(&ssp->node, &ssp_list); diff --git a/include/linux/pxa2xx_ssp.h b/include/linux/pxa2xx_ssp.h index 467cc6307b62..49444203328a 100644 --- a/include/linux/pxa2xx_ssp.h +++ b/include/linux/pxa2xx_ssp.h @@ -21,6 +21,8 @@ #include <linux/list.h> #include <linux/io.h> +#include <linux/of.h> + /* * SSP Serial Port Registers @@ -190,6 +192,8 @@ struct ssp_device { int irq; int drcmr_rx; int drcmr_tx; + + struct device_node *of_node; }; /** @@ -218,11 +222,18 @@ static inline u32 pxa_ssp_read_reg(struct ssp_device *dev, u32 reg) #ifdef CONFIG_ARCH_PXA struct ssp_device *pxa_ssp_request(int port, const char *label); void pxa_ssp_free(struct ssp_device *); +struct ssp_device *pxa_ssp_request_of(const struct device_node *of_node, + const char *label); #else static inline struct ssp_device *pxa_ssp_request(int port, const char *label) { return NULL; } +static inline struct ssp_device *pxa_ssp_request_of(const struct device_node *n, + const char *name) +{ + return NULL; +} static inline void pxa_ssp_free(struct ssp_device *ssp) {} #endif |