[PATCH 3/7] powerpc/papr_scm: Update DT properties

[Oliver O'Halloran]

The ibm,unit-sizes property was originally specified as an array of two
u32s corresponding to the memory block size, and the number of blocks
available in that region. A fairly last-minute change to the SCM DT
specification was splitting that into two seperate u64 properties:
ibm,block-sizes and ibm,number-of-blocks that convey the same
information. No firmware / hypervisor that emitted the ibm,unit-size
property ever appeared in the wild.

Fixes: b5beae5e224f ("powerpc/pseries: Add driver for PAPR SCM regions")
Signed-off-by: Oliver O'Halloran <ooh...@gmail.com>
---
 arch/powerpc/platforms/pseries/papr_scm.c | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/arch/powerpc/platforms/pseries/papr_scm.c 
b/arch/powerpc/platforms/pseries/papr_scm.c
index 390badd33547..ed1082cc1d27 100644
--- a/arch/powerpc/platforms/pseries/papr_scm.c
+++ b/arch/powerpc/platforms/pseries/papr_scm.c
@@ -257,8 +257,9 @@ err:        nvdimm_bus_unregister(p->bus);
 
 static int papr_scm_probe(struct platform_device *pdev)
 {
-       uint32_t drc_index, metadata_size, unit_cap[2];
        struct device_node *dn = pdev->dev.of_node;
+       uint32_t drc_index, metadata_size;
+       uint64_t blocks, block_size;
        struct papr_scm_priv *p;
        int rc;
 
@@ -268,8 +269,13 @@ static int papr_scm_probe(struct platform_device *pdev)
                return -ENODEV;
        }
 
-       if (of_property_read_u32_array(dn, "ibm,unit-capacity", unit_cap, 2)) {
-               dev_err(&pdev->dev, "%pOF: missing unit-capacity!\n", dn);
+       if (of_property_read_u64(dn, "ibm,block-size", &block_size)) {
+               dev_err(&pdev->dev, "%pOF: missing block-size!\n", dn);
+               return -ENODEV;
+       }
+
+       if (of_property_read_u64(dn, "ibm,number-of-blocks", &blocks)) {
+               dev_err(&pdev->dev, "%pOF: missing number-of-blocks!\n", dn);
                return -ENODEV;
        }
 
@@ -282,8 +288,8 @@ static int papr_scm_probe(struct platform_device *pdev)
 
        p->dn = dn;
        p->drc_index = drc_index;
-       p->block_size = unit_cap[0];
-       p->blocks     = unit_cap[1];
+       p->block_size = block_size;
+       p->blocks = blocks;
 
        /* might be zero */
        p->metadata_size = metadata_size;
-- 
2.17.2