uio: uio_pruss: replace private SRAM API with genalloc

Remove the use of the private DaVinci SRAM API in favor
of genalloc. The pool to be used is provided by platform
data.

Signed-off-by: Matt Porter <mporter@ti.com>
Signed-off-by: "Hans J. Koch" <hjk@hansjkoch.de>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

3 files changed, 20 insertions, 8 deletions

diff --git a/drivers/uio/Kconfig b/drivers/uio/Kconfig
index 6f3ea9bbc818..c48b93813fc1 100644
--- a/drivers/uio/Kconfig
+++ b/drivers/uio/Kconfig
@@ -97,6 +97,7 @@ config UIO_NETX
 config UIO_PRUSS
         tristate "Texas Instruments PRUSS driver"
         depends on ARCH_DAVINCI_DA850
+        select GENERIC_ALLOCATOR
         help
           PRUSS driver for OMAPL138/DA850/AM18XX devices
           PRUSS driver requires user space components, examples and user space
diff --git a/drivers/uio/uio_pruss.c b/drivers/uio/uio_pruss.c
index 33a7a273b453..f8738de342be 100644
--- a/drivers/uio/uio_pruss.c
+++ b/drivers/uio/uio_pruss.c
@@ -25,7 +25,7 @@
 #include <linux/clk.h>
 #include <linux/dma-mapping.h>
 #include <linux/slab.h>
-#include <mach/sram.h>
+#include <linux/genalloc.h>
 
 #define DRV_NAME "pruss_uio"
 #define DRV_VERSION "1.0"
@@ -65,10 +65,11 @@ struct uio_pruss_dev {
         dma_addr_t sram_paddr;
         dma_addr_t ddr_paddr;
         void __iomem *prussio_vaddr;
-        void *sram_vaddr;
+        unsigned long sram_vaddr;
         void *ddr_vaddr;
         unsigned int hostirq_start;
         unsigned int pintc_base;
+        struct gen_pool *sram_pool;
 };
 
 static irqreturn_t pruss_handler(int irq, struct uio_info *info)
@@ -106,7 +107,9 @@ static void pruss_cleanup(struct platform_device *dev,
                         gdev->ddr_paddr);
         }
         if (gdev->sram_vaddr)
-                sram_free(gdev->sram_vaddr, sram_pool_sz);
+                gen_pool_free(gdev->sram_pool,
+                              gdev->sram_vaddr,
+                              sram_pool_sz);
         kfree(gdev->info);
         clk_put(gdev->pruss_clk);
         kfree(gdev);
@@ -152,10 +155,17 @@ static int __devinit pruss_probe(struct platform_device *dev)
                 goto out_free;
         }
 
-        gdev->sram_vaddr = sram_alloc(sram_pool_sz, &(gdev->sram_paddr));
-        if (!gdev->sram_vaddr) {
-                dev_err(&dev->dev, "Could not allocate SRAM pool\n");
-                goto out_free;
+        if (pdata->sram_pool) {
+                gdev->sram_pool = pdata->sram_pool;
+                gdev->sram_vaddr =
+                        gen_pool_alloc(gdev->sram_pool, sram_pool_sz);
+                if (!gdev->sram_vaddr) {
+                        dev_err(&dev->dev, "Could not allocate SRAM pool\n");
+                        goto out_free;
+                }
+                gdev->sram_paddr =
+                        gen_pool_virt_to_phys(gdev->sram_pool,
+                                              gdev->sram_vaddr);
         }
 
         gdev->ddr_vaddr = dma_alloc_coherent(&dev->dev, extram_pool_sz,
diff --git a/include/linux/platform_data/uio_pruss.h b/include/linux/platform_data/uio_pruss.h
index f39140aabc6f..3d47d219827f 100644
--- a/include/linux/platform_data/uio_pruss.h
+++ b/include/linux/platform_data/uio_pruss.h
@@ -20,6 +20,7 @@
 
 /* To configure the PRUSS INTC base offset for UIO driver */
 struct uio_pruss_pdata {
-        u32     pintc_base;
+        u32             pintc_base;
+        struct gen_pool *sram_pool;
 };
 #endif /* _UIO_PRUSS_H_ */