This series add a new uio driver for freescale 85xx platforms to
access the Cache-Sram form user level. This is extremely helpful
for the user-space applications that require high performance memory
accesses.
It fixes the compile errors and warning of the hardware level drivers
and implements the uio driver in uio_fsl_85xx_cache_sram.c.
Changes since v1:
* Addressed comments from Greg K-H
* Moved kfree(info->name) into uio_info_free_internal()
Changes since v2:
* Drop the patch that modifies Kconfigs of arch/powerpc/platforms
and modified the sequence of patches:
01:dropped, 02->03, 03->02, 04->01, 05->04
* Addressed comments from Greg, Scott and Christophe
* Use "uiomem->internal_addr" as if condition for sram memory free,
and memset the uiomem entry
* Modified of_match_table make the driver apart from Cache-Sram HW info
which belong to the HW level driver fsl_85xx_cache_sram to match
* Use roundup_pow_of_two for align calc
* Remove useless clear block of uiomem entries.
* Use UIO_INFO_VER micro for info->version, and define it as
"devicetree,pseudo", meaning this is pseudo device and probed from
device tree configuration
* Select FSL_85XX_CACHE_SRAM rather than depends on it
Changes since v3:
* Addressed comments from Christophe(use devm_xxx memory alloc interfaces)
Changes since v4:
* Use module_param_string for of_match_table, no binding to devicetree
Wang Wenhu (4):
powerpc: sysdev: fix compile error for fsl_85xx_l2ctlr
powerpc: sysdev: fix compile error for fsl_85xx_cache_sram
powerpc: sysdev: fix compile warning for fsl_85xx_cache_sram
drivers: uio: new driver for fsl_85xx_cache_sram
arch/powerpc/sysdev/fsl_85xx_cache_sram.c | 3 +-
arch/powerpc/sysdev/fsl_85xx_l2ctlr.c | 1 +
drivers/uio/Kconfig | 9 ++
drivers/uio/Makefile | 1 +
drivers/uio/uio_fsl_85xx_cache_sram.c | 154 ++++++++++++++++++++++
5 files changed, 167 insertions(+), 1 deletion(-)
create mode 100644 drivers/uio/uio_fsl_85xx_cache_sram.c
--
2.17.1
Function instantiate_cache_sram should not be linked into the init
section for its caller mpc85xx_l2ctlr_of_probe is none-__init.
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Christophe Leroy <[email protected]>
Cc: Scott Wood <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: [email protected]
Fixes: 6db92cc9d07d ("powerpc/85xx: add cache-sram support")
Reviewed-by: Christophe Leroy <[email protected]>
Signed-off-by: Wang Wenhu <[email protected]>
Warning information:
MODPOST vmlinux.o
WARNING: modpost: vmlinux.o(.text+0x1e540): Section mismatch in reference from the function mpc85xx_l2ctlr_of_probe() to the function .init.text:instantiate_cache_sram()
The function mpc85xx_l2ctlr_of_probe() references
the function __init instantiate_cache_sram().
This is often because mpc85xx_l2ctlr_of_probe lacks a __init
annotation or the annotation of instantiate_cache_sram is wrong.
---
Changes since v1:
* None
Changes since v2:
* None
Changes since v3:
* None
Changes since v4:
* None
---
arch/powerpc/sysdev/fsl_85xx_cache_sram.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/sysdev/fsl_85xx_cache_sram.c b/arch/powerpc/sysdev/fsl_85xx_cache_sram.c
index be3aef4229d7..3de5ac8382c0 100644
--- a/arch/powerpc/sysdev/fsl_85xx_cache_sram.c
+++ b/arch/powerpc/sysdev/fsl_85xx_cache_sram.c
@@ -68,7 +68,7 @@ void mpc85xx_cache_sram_free(void *ptr)
}
EXPORT_SYMBOL(mpc85xx_cache_sram_free);
-int __init instantiate_cache_sram(struct platform_device *dev,
+int instantiate_cache_sram(struct platform_device *dev,
struct sram_parameters sram_params)
{
int ret = 0;
--
2.17.1
Include linux/io.h into fsl_85xx_cache_sram.c to fix the
implicit-declaration compile error when building Cache-Sram.
arch/powerpc/sysdev/fsl_85xx_cache_sram.c: In function ‘instantiate_cache_sram’:
arch/powerpc/sysdev/fsl_85xx_cache_sram.c:97:26: error: implicit declaration of function ‘ioremap_coherent’; did you mean ‘bitmap_complement’? [-Werror=implicit-function-declaration]
cache_sram->base_virt = ioremap_coherent(cache_sram->base_phys,
^~~~~~~~~~~~~~~~
bitmap_complement
arch/powerpc/sysdev/fsl_85xx_cache_sram.c:97:24: error: assignment makes pointer from integer without a cast [-Werror=int-conversion]
cache_sram->base_virt = ioremap_coherent(cache_sram->base_phys,
^
arch/powerpc/sysdev/fsl_85xx_cache_sram.c:123:2: error: implicit declaration of function ‘iounmap’; did you mean ‘roundup’? [-Werror=implicit-function-declaration]
iounmap(cache_sram->base_virt);
^~~~~~~
roundup
cc1: all warnings being treated as errors
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Christophe Leroy <[email protected]>
Cc: Scott Wood <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: [email protected]
Fixes: 6db92cc9d07d ("powerpc/85xx: add cache-sram support")
Reviewed-by: Christophe Leroy <[email protected]>
Signed-off-by: Wang Wenhu <[email protected]>
---
Changes since v1:
* None
Changes since v2:
* None
Changes since v3:
* None
Changes since v4:
* None
---
arch/powerpc/sysdev/fsl_85xx_cache_sram.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/powerpc/sysdev/fsl_85xx_cache_sram.c b/arch/powerpc/sysdev/fsl_85xx_cache_sram.c
index f6c665dac725..be3aef4229d7 100644
--- a/arch/powerpc/sysdev/fsl_85xx_cache_sram.c
+++ b/arch/powerpc/sysdev/fsl_85xx_cache_sram.c
@@ -17,6 +17,7 @@
#include <linux/of_platform.h>
#include <asm/pgtable.h>
#include <asm/fsl_85xx_cache_sram.h>
+#include <linux/io.h>
#include "fsl_85xx_cache_ctlr.h"
--
2.17.1
Include "linux/of_address.h" to fix the compile error for
mpc85xx_l2ctlr_of_probe() when compiling fsl_85xx_cache_sram.c.
CC arch/powerpc/sysdev/fsl_85xx_l2ctlr.o
arch/powerpc/sysdev/fsl_85xx_l2ctlr.c: In function ‘mpc85xx_l2ctlr_of_probe’:
arch/powerpc/sysdev/fsl_85xx_l2ctlr.c:90:11: error: implicit declaration of function ‘of_iomap’; did you mean ‘pci_iomap’? [-Werror=implicit-function-declaration]
l2ctlr = of_iomap(dev->dev.of_node, 0);
^~~~~~~~
pci_iomap
arch/powerpc/sysdev/fsl_85xx_l2ctlr.c:90:9: error: assignment makes pointer from integer without a cast [-Werror=int-conversion]
l2ctlr = of_iomap(dev->dev.of_node, 0);
^
cc1: all warnings being treated as errors
scripts/Makefile.build:267: recipe for target 'arch/powerpc/sysdev/fsl_85xx_l2ctlr.o' failed
make[2]: *** [arch/powerpc/sysdev/fsl_85xx_l2ctlr.o] Error 1
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Christophe Leroy <[email protected]>
Cc: Scott Wood <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: [email protected]
Fixes: 6db92cc9d07d ("powerpc/85xx: add cache-sram support")
Reviewed-by: Christophe Leroy <[email protected]>
Signed-off-by: Wang Wenhu <[email protected]>
---
Changes since v1:
* None
Changes since v2:
* None
Changes since v3:
* None
Changes since v4:
* None
---
arch/powerpc/sysdev/fsl_85xx_l2ctlr.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/powerpc/sysdev/fsl_85xx_l2ctlr.c b/arch/powerpc/sysdev/fsl_85xx_l2ctlr.c
index 2d0af0c517bb..7533572492f0 100644
--- a/arch/powerpc/sysdev/fsl_85xx_l2ctlr.c
+++ b/arch/powerpc/sysdev/fsl_85xx_l2ctlr.c
@@ -10,6 +10,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_platform.h>
+#include <linux/of_address.h>
#include <asm/io.h>
#include "fsl_85xx_cache_ctlr.h"
--
2.17.1
A driver for freescale 85xx platforms to access the Cache-Sram form
user level. This is extremely helpful for some user-space applications
that require high performance memory accesses.
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Christophe Leroy <[email protected]>
Cc: Scott Wood <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: [email protected]
Reviewed-by: Christophe Leroy <[email protected]>
Signed-off-by: Wang Wenhu <[email protected]>
---
Changes since v1:
* Addressed comments from Greg K-H
* Moved kfree(info->name) into uio_info_free_internal()
Changes since v2:
* Addressed comments from Greg, Scott and Christophe
* Use "uiomem->internal_addr" as if condition for sram memory free,
and memset the uiomem entry
* of_match_table modified to be apart from HW info which belong to
the HW level driver fsl_85xx_cache_sram to match
* Use roundup_pow_of_two for align calc
* Remove useless clear block of uiomem entries.
* Use UIO_INFO_VER micro for info->version, and define it as
"devicetree,pseudo", meaning this is pseudo device and probed from
device tree configuration
Changes since v3:
* Addressed comments from Christophe(use devm_xxx memory alloc interfaces)
Changes since v4:
* Use module_param_string for of_match_table, no binding to devicetree
---
drivers/uio/Kconfig | 9 ++
drivers/uio/Makefile | 1 +
drivers/uio/uio_fsl_85xx_cache_sram.c | 154 ++++++++++++++++++++++++++
3 files changed, 164 insertions(+)
create mode 100644 drivers/uio/uio_fsl_85xx_cache_sram.c
diff --git a/drivers/uio/Kconfig b/drivers/uio/Kconfig
index 202ee81cfc2b..9c3b47461b71 100644
--- a/drivers/uio/Kconfig
+++ b/drivers/uio/Kconfig
@@ -105,6 +105,15 @@ config UIO_NETX
To compile this driver as a module, choose M here; the module
will be called uio_netx.
+config UIO_FSL_85XX_CACHE_SRAM
+ tristate "Freescale 85xx Cache-Sram driver"
+ depends on FSL_SOC_BOOKE && PPC32
+ select FSL_85XX_CACHE_SRAM
+ help
+ Generic driver for accessing the Cache-Sram form user level. This
+ is extremely helpful for some user-space applications that require
+ high performance memory accesses.
+
config UIO_FSL_ELBC_GPCM
tristate "eLBC/GPCM driver"
depends on FSL_LBC
diff --git a/drivers/uio/Makefile b/drivers/uio/Makefile
index c285dd2a4539..be2056cffc21 100644
--- a/drivers/uio/Makefile
+++ b/drivers/uio/Makefile
@@ -10,4 +10,5 @@ obj-$(CONFIG_UIO_NETX) += uio_netx.o
obj-$(CONFIG_UIO_PRUSS) += uio_pruss.o
obj-$(CONFIG_UIO_MF624) += uio_mf624.o
obj-$(CONFIG_UIO_FSL_ELBC_GPCM) += uio_fsl_elbc_gpcm.o
+obj-$(CONFIG_UIO_FSL_85XX_CACHE_SRAM) += uio_fsl_85xx_cache_sram.o
obj-$(CONFIG_UIO_HV_GENERIC) += uio_hv_generic.o
diff --git a/drivers/uio/uio_fsl_85xx_cache_sram.c b/drivers/uio/uio_fsl_85xx_cache_sram.c
new file mode 100644
index 000000000000..4db3648629b3
--- /dev/null
+++ b/drivers/uio/uio_fsl_85xx_cache_sram.c
@@ -0,0 +1,154 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020 Vivo Communication Technology Co. Ltd.
+ * Copyright (C) 2020 Wang Wenhu <[email protected]>
+ * All rights reserved.
+ */
+
+#include <linux/platform_device.h>
+#include <linux/uio_driver.h>
+#include <linux/stringify.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <asm/fsl_85xx_cache_sram.h>
+
+#define DRIVER_NAME "uio_fsl_85xx_cache_sram"
+#define UIO_INFO_VER "devicetree,pseudo"
+#define UIO_NAME "uio_cache_sram"
+
+static void uio_info_free_internal(struct uio_info *info)
+{
+ int i;
+
+ for (i = 0; i < MAX_UIO_MAPS; i++) {
+ struct uio_mem *uiomem = &info->mem[i];
+
+ if (uiomem->internal_addr) {
+ mpc85xx_cache_sram_free(uiomem->internal_addr);
+ memset(uiomem, 0, sizeof(*uiomem));
+ }
+ }
+}
+
+static int uio_fsl_85xx_cache_sram_probe(struct platform_device *pdev)
+{
+ struct device_node *parent = pdev->dev.of_node;
+ struct device_node *node = NULL;
+ struct uio_info *info;
+ struct uio_mem *uiomem;
+ const char *dt_name;
+ u32 mem_size;
+ int ret;
+
+ /* alloc uio_info for one device */
+ info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ /* get optional uio name */
+ if (of_property_read_string(parent, "uio_name", &dt_name))
+ dt_name = UIO_NAME;
+
+ info->name = devm_kstrdup(&pdev->dev, dt_name, GFP_KERNEL);
+ if (!info->name)
+ return -ENOMEM;
+
+ uiomem = info->mem;
+ for_each_child_of_node(parent, node) {
+ void *virt;
+ phys_addr_t phys;
+
+ ret = of_property_read_u32(node, "cache-mem-size", &mem_size);
+ if (ret) {
+ ret = -EINVAL;
+ goto err_out;
+ }
+
+ if (mem_size == 0) {
+ dev_err(&pdev->dev, "error cache-mem-size should not be 0\n");
+ ret = -EINVAL;
+ goto err_out;
+ }
+
+ virt = mpc85xx_cache_sram_alloc(mem_size, &phys,
+ roundup_pow_of_two(mem_size));
+ if (!virt) {
+ /* mpc85xx_cache_sram_alloc to define the real cause */
+ ret = -ENOMEM;
+ goto err_out;
+ }
+
+ uiomem->memtype = UIO_MEM_PHYS;
+ uiomem->addr = phys;
+ uiomem->size = mem_size;
+ uiomem->name = kstrdup(node->name, GFP_KERNEL);
+ uiomem->internal_addr = virt;
+ uiomem++;
+
+ if (uiomem >= &info->mem[MAX_UIO_MAPS]) {
+ dev_warn(&pdev->dev, "more than %d uio-maps for device.\n",
+ MAX_UIO_MAPS);
+ break;
+ }
+ }
+
+ if (uiomem == info->mem) {
+ dev_err(&pdev->dev, "error no valid uio-map configuration found\n");
+ return -EINVAL;
+ }
+
+ info->version = UIO_INFO_VER;
+
+ /* register uio device */
+ if (uio_register_device(&pdev->dev, info)) {
+ dev_err(&pdev->dev, "error uio,cache-sram registration failed\n");
+ ret = -ENODEV;
+ goto err_out;
+ }
+
+ platform_set_drvdata(pdev, info);
+
+ return 0;
+err_out:
+ uio_info_free_internal(info);
+ return ret;
+}
+
+static int uio_fsl_85xx_cache_sram_remove(struct platform_device *pdev)
+{
+ struct uio_info *info = platform_get_drvdata(pdev);
+
+ uio_unregister_device(info);
+
+ uio_info_free_internal(info);
+
+ return 0;
+}
+
+#ifdef CONFIG_OF
+static struct of_device_id uio_fsl_85xx_cache_sram_of_match[] = {
+ { /* This is filled with module_parm */ },
+ { /* Sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, uio_fsl_85xx_cache_sram_of_match);
+
+module_param_string(of_id, uio_fsl_85xx_cache_sram_of_match[0].compatible,
+ sizeof(uio_fsl_85xx_cache_sram_of_match[0].compatible), 0);
+MODULE_PARM_DESC(of_id, "platform device id to be handled by cache-sram-uio");
+#endif
+
+static struct platform_driver uio_fsl_85xx_cache_sram = {
+ .probe = uio_fsl_85xx_cache_sram_probe,
+ .remove = uio_fsl_85xx_cache_sram_remove,
+ .driver = {
+ .name = DRIVER_NAME,
+ .of_match_table = of_match_ptr(uio_fsl_85xx_cache_sram_of_match),
+ },
+};
+
+module_platform_driver(uio_fsl_85xx_cache_sram);
+
+MODULE_AUTHOR("Wang Wenhu <[email protected]>");
+MODULE_DESCRIPTION("Freescale MPC85xx Cache-Sram UIO Platform Driver");
+MODULE_ALIAS("platform:" DRIVER_NAME);
+MODULE_LICENSE("GPL v2");
--
2.17.1
>A driver for freescale 85xx platforms to access the Cache-Sram form>user level. This is extremely helpful for some user-space applications
>that require high performance memory accesses.
>
>Cc: Greg Kroah-Hartman <[email protected]>
>Cc: Christophe Leroy <[email protected]>
>Cc: Scott Wood <[email protected]>
>Cc: Michael Ellerman <[email protected]>
>Cc: [email protected]
>Reviewed-by: Christophe Leroy <[email protected]>
>Signed-off-by: Wang Wenhu <[email protected]>
Hi, Christophe,
I labeled you Reviewed comment.
Regards,
Wenhu
>---
>Changes since v1:
> * Addressed comments from Greg K-H
> * Moved kfree(info->name) into uio_info_free_internal()
>Changes since v2:
> * Addressed comments from Greg, Scott and Christophe
> * Use "uiomem->internal_addr" as if condition for sram memory free,
> and memset the uiomem entry
> * of_match_table modified to be apart from HW info which belong to
> the HW level driver fsl_85xx_cache_sram to match
> * Use roundup_pow_of_two for align calc
> * Remove useless clear block of uiomem entries.
> * Use UIO_INFO_VER micro for info->version, and define it as
> "devicetree,pseudo", meaning this is pseudo device and probed from
> device tree configuration
>Changes since v3:
> * Addressed comments from Christophe(use devm_xxx memory alloc interfaces)
>Changes since v4:
> * Use module_param_string for of_match_table, no binding to devicetree
>---
> drivers/uio/Kconfig | 9 ++
> drivers/uio/Makefile | 1 +
> drivers/uio/uio_fsl_85xx_cache_sram.c | 154 ++++++++++++++++++++++++++
> 3 files changed, 164 insertions(+)
> create mode 100644 drivers/uio/uio_fsl_85xx_cache_sram.c
>
>diff --git a/drivers/uio/Kconfig b/drivers/uio/Kconfig
>index 202ee81cfc2b..9c3b47461b71 100644
>--- a/drivers/uio/Kconfig
>+++ b/drivers/uio/Kconfig
>@@ -105,6 +105,15 @@ config UIO_NETX
> To compile this driver as a module, choose M here; the module
> will be called uio_netx.
>
>+config UIO_FSL_85XX_CACHE_SRAM
>+ tristate "Freescale 85xx Cache-Sram driver"
>+ depends on FSL_SOC_BOOKE && PPC32
>+ select FSL_85XX_CACHE_SRAM
>+ help
>+ Generic driver for accessing the Cache-Sram form user level. This
>+ is extremely helpful for some user-space applications that require
>+ high performance memory accesses.
>+
> config UIO_FSL_ELBC_GPCM
> tristate "eLBC/GPCM driver"
> depends on FSL_LBC
>diff --git a/drivers/uio/Makefile b/drivers/uio/Makefile
>index c285dd2a4539..be2056cffc21 100644
>--- a/drivers/uio/Makefile
>+++ b/drivers/uio/Makefile
>@@ -10,4 +10,5 @@ obj-$(CONFIG_UIO_NETX) += uio_netx.o
> obj-$(CONFIG_UIO_PRUSS) += uio_pruss.o
> obj-$(CONFIG_UIO_MF624) += uio_mf624.o
> obj-$(CONFIG_UIO_FSL_ELBC_GPCM) += uio_fsl_elbc_gpcm.o
>+obj-$(CONFIG_UIO_FSL_85XX_CACHE_SRAM) += uio_fsl_85xx_cache_sram.o
> obj-$(CONFIG_UIO_HV_GENERIC) += uio_hv_generic.o
>diff --git a/drivers/uio/uio_fsl_85xx_cache_sram.c b/drivers/uio/uio_fsl_85xx_cache_sram.c
>new file mode 100644
>index 000000000000..4db3648629b3
>--- /dev/null
>+++ b/drivers/uio/uio_fsl_85xx_cache_sram.c
>@@ -0,0 +1,154 @@
>+// SPDX-License-Identifier: GPL-2.0
>+/*
>+ * Copyright (C) 2020 Vivo Communication Technology Co. Ltd.
>+ * Copyright (C) 2020 Wang Wenhu <[email protected]>
>+ * All rights reserved.
>+ */
>+
>+#include <linux/platform_device.h>
>+#include <linux/uio_driver.h>
>+#include <linux/stringify.h>
>+#include <linux/module.h>
>+#include <linux/kernel.h>
>+#include <asm/fsl_85xx_cache_sram.h>
>+
>+#define DRIVER_NAME "uio_fsl_85xx_cache_sram"
>+#define UIO_INFO_VER "devicetree,pseudo"
>+#define UIO_NAME "uio_cache_sram"
>+
>+static void uio_info_free_internal(struct uio_info *info)
>+{
>+ int i;
>+
>+ for (i = 0; i < MAX_UIO_MAPS; i++) {
>+ struct uio_mem *uiomem = &info->mem[i];
>+
>+ if (uiomem->internal_addr) {
>+ mpc85xx_cache_sram_free(uiomem->internal_addr);
>+ memset(uiomem, 0, sizeof(*uiomem));
>+ }
>+ }
>+}
>+
>+static int uio_fsl_85xx_cache_sram_probe(struct platform_device *pdev)
>+{
>+ struct device_node *parent = pdev->dev.of_node;
>+ struct device_node *node = NULL;
>+ struct uio_info *info;
>+ struct uio_mem *uiomem;
>+ const char *dt_name;
>+ u32 mem_size;
>+ int ret;
>+
>+ /* alloc uio_info for one device */
>+ info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
>+ if (!info)
>+ return -ENOMEM;
>+
>+ /* get optional uio name */
>+ if (of_property_read_string(parent, "uio_name", &dt_name))
>+ dt_name = UIO_NAME;
>+
>+ info->name = devm_kstrdup(&pdev->dev, dt_name, GFP_KERNEL);
>+ if (!info->name)
>+ return -ENOMEM;
>+
>+ uiomem = info->mem;
>+ for_each_child_of_node(parent, node) {
>+ void *virt;
>+ phys_addr_t phys;
>+
>+ ret = of_property_read_u32(node, "cache-mem-size", &mem_size);
>+ if (ret) {
>+ ret = -EINVAL;
>+ goto err_out;
>+ }
>+
>+ if (mem_size == 0) {
>+ dev_err(&pdev->dev, "error cache-mem-size should not be 0\n");
>+ ret = -EINVAL;
>+ goto err_out;
>+ }
>+
>+ virt = mpc85xx_cache_sram_alloc(mem_size, &phys,
>+ roundup_pow_of_two(mem_size));
>+ if (!virt) {
>+ /* mpc85xx_cache_sram_alloc to define the real cause */
>+ ret = -ENOMEM;
>+ goto err_out;
>+ }
>+
>+ uiomem->memtype = UIO_MEM_PHYS;
>+ uiomem->addr = phys;
>+ uiomem->size = mem_size;
>+ uiomem->name = kstrdup(node->name, GFP_KERNEL);
>+ uiomem->internal_addr = virt;
>+ uiomem++;
>+
>+ if (uiomem >= &info->mem[MAX_UIO_MAPS]) {
>+ dev_warn(&pdev->dev, "more than %d uio-maps for device.\n",
>+ MAX_UIO_MAPS);
>+ break;
>+ }
>+ }
>+
>+ if (uiomem == info->mem) {
>+ dev_err(&pdev->dev, "error no valid uio-map configuration found\n");
>+ return -EINVAL;
>+ }
>+
>+ info->version = UIO_INFO_VER;
>+
>+ /* register uio device */
>+ if (uio_register_device(&pdev->dev, info)) {
>+ dev_err(&pdev->dev, "error uio,cache-sram registration failed\n");
>+ ret = -ENODEV;
>+ goto err_out;
>+ }
>+
>+ platform_set_drvdata(pdev, info);
>+
>+ return 0;
>+err_out:
>+ uio_info_free_internal(info);
>+ return ret;
>+}
>+
>+static int uio_fsl_85xx_cache_sram_remove(struct platform_device *pdev)
>+{
>+ struct uio_info *info = platform_get_drvdata(pdev);
>+
>+ uio_unregister_device(info);
>+
>+ uio_info_free_internal(info);
>+
>+ return 0;
>+}
>+
>+#ifdef CONFIG_OF
>+static struct of_device_id uio_fsl_85xx_cache_sram_of_match[] = {
>+ { /* This is filled with module_parm */ },
>+ { /* Sentinel */ },
>+};
>+MODULE_DEVICE_TABLE(of, uio_fsl_85xx_cache_sram_of_match);
>+
>+module_param_string(of_id, uio_fsl_85xx_cache_sram_of_match[0].compatible,
>+ sizeof(uio_fsl_85xx_cache_sram_of_match[0].compatible), 0);
>+MODULE_PARM_DESC(of_id, "platform device id to be handled by cache-sram-uio");
>+#endif
>+
>+static struct platform_driver uio_fsl_85xx_cache_sram = {
>+ .probe = uio_fsl_85xx_cache_sram_probe,
>+ .remove = uio_fsl_85xx_cache_sram_remove,
>+ .driver = {
>+ .name = DRIVER_NAME,
>+ .of_match_table = of_match_ptr(uio_fsl_85xx_cache_sram_of_match),
>+ },
>+};
>+
>+module_platform_driver(uio_fsl_85xx_cache_sram);
>+
>+MODULE_AUTHOR("Wang Wenhu <[email protected]>");
>+MODULE_DESCRIPTION("Freescale MPC85xx Cache-Sram UIO Platform Driver");
>+MODULE_ALIAS("platform:" DRIVER_NAME);
>+MODULE_LICENSE("GPL v2");
>--
>2.17.1
>