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| author | Cyril Bur <cyrilbur@gmail.com> | 2015-04-01 06:05:30 (GMT) |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2015-04-11 10:49:21 (GMT) |
| commit | ed59190e41b725e1cfd79541f5fc66c20adb0671 (patch) | |
| tree | 94af3907d402d230020c0023b4f3ccaac8306585 /arch/powerpc/platforms/powernv | |
| parent | d1d915783d90b15236e73d261cd8909db7275001 (diff) | |
| download | linux-ed59190e41b725e1cfd79541f5fc66c20adb0671.tar.xz | |
powerpc/powernv: Add interfaces for flash device access
This change adds the OPAL interface definitions to allow Linux to read,
write and erase from system flash devices. We register platform devices
for the flash devices exported by firmware.
We clash with the existing opal_flash_init function, which is really for
the FSP flash update functionality, so we rename that initcall to
opal_flash_update_init().
A future change will add an mtd driver that uses this interface.
Changes from Joel Stanley and Jeremy Kerr.
Signed-off-by: Cyril Bur <cyrilbur@gmail.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Joel Stanley <joel@jms.id.au>
Acked-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/platforms/powernv')
| -rw-r--r-- | arch/powerpc/platforms/powernv/opal-flash.c | 2 | ||||
| -rw-r--r-- | arch/powerpc/platforms/powernv/opal-wrappers.S | 3 | ||||
| -rw-r--r-- | arch/powerpc/platforms/powernv/opal.c | 16 |
3 files changed, 19 insertions, 2 deletions
diff --git a/arch/powerpc/platforms/powernv/opal-flash.c b/arch/powerpc/platforms/powernv/opal-flash.c index 0ff07ff..4ec6219 100644 --- a/arch/powerpc/platforms/powernv/opal-flash.c +++ b/arch/powerpc/platforms/powernv/opal-flash.c @@ -546,7 +546,7 @@ static struct attribute_group image_op_attr_group = { .attrs = image_op_attrs, }; -void __init opal_flash_init(void) +void __init opal_flash_update_init(void) { int ret; diff --git a/arch/powerpc/platforms/powernv/opal-wrappers.S b/arch/powerpc/platforms/powernv/opal-wrappers.S index b23fe7c..4e74037 100644 --- a/arch/powerpc/platforms/powernv/opal-wrappers.S +++ b/arch/powerpc/platforms/powernv/opal-wrappers.S @@ -292,3 +292,6 @@ OPAL_CALL(opal_tpo_read, OPAL_READ_TPO); OPAL_CALL(opal_ipmi_send, OPAL_IPMI_SEND); OPAL_CALL(opal_ipmi_recv, OPAL_IPMI_RECV); OPAL_CALL(opal_i2c_request, OPAL_I2C_REQUEST); +OPAL_CALL(opal_flash_read, OPAL_FLASH_READ); +OPAL_CALL(opal_flash_write, OPAL_FLASH_WRITE); +OPAL_CALL(opal_flash_erase, OPAL_FLASH_ERASE); diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c index 3fb981c..2241565 100644 --- a/arch/powerpc/platforms/powernv/opal.c +++ b/arch/powerpc/platforms/powernv/opal.c @@ -693,6 +693,15 @@ static void __init opal_dump_region_init(void) "rc = %d\n", rc); } +static void opal_flash_init(struct device_node *opal_node) +{ + struct device_node *np; + + for_each_child_of_node(opal_node, np) + if (of_device_is_compatible(np, "ibm,opal-flash")) + of_platform_device_create(np, NULL, NULL); +} + static void opal_ipmi_init(struct device_node *opal_node) { struct device_node *np; @@ -817,7 +826,7 @@ static int __init opal_init(void) /* Setup error log interface */ rc = opal_elog_init(); /* Setup code update interface */ - opal_flash_init(); + opal_flash_update_init(); /* Setup platform dump extract interface */ opal_platform_dump_init(); /* Setup system parameters interface */ @@ -829,6 +838,8 @@ static int __init opal_init(void) /* Initialize OPAL IPMI backend */ opal_ipmi_init(opal_node); + opal_flash_init(opal_node); + return 0; } machine_subsys_initcall(powernv, opal_init); @@ -867,6 +878,9 @@ void opal_shutdown(void) EXPORT_SYMBOL_GPL(opal_invalid_call); EXPORT_SYMBOL_GPL(opal_ipmi_send); EXPORT_SYMBOL_GPL(opal_ipmi_recv); +EXPORT_SYMBOL_GPL(opal_flash_read); +EXPORT_SYMBOL_GPL(opal_flash_write); +EXPORT_SYMBOL_GPL(opal_flash_erase); /* Convert a region of vmalloc memory to an opal sg list */ struct opal_sg_list *opal_vmalloc_to_sg_list(void *vmalloc_addr, |