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

Message ID 20181206151714.28494-4-oohall@gmail.com
State Accepted
Commit 683ec0e04ab7e2d86d2656c71322dfb2ebf063fc
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Series
  • [1/7] powerpc/papr_scm: Use depend instead of select
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Context Check Description
snowpatch_ozlabs/checkpatch warning total: 0 errors, 1 warnings, 2 checks, 35 lines checked
snowpatch_ozlabs/apply_patch success next/apply_patch Successfully applied

Commit Message

Oliver Dec. 6, 2018, 3:17 p.m.
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 <oohall@gmail.com>
---
 arch/powerpc/platforms/pseries/papr_scm.c | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

Patch

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;