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authorOliver O'Halloran <oohall@gmail.com>2018-12-06 18:17:10 +0300
committerMichael Ellerman <mpe@ellerman.id.au>2018-12-09 13:32:16 +0300
commit683ec0e04ab7e2d86d2656c71322dfb2ebf063fc (patch)
treede470325d8658aebe7fd4f09bcc95bfdca2e6deb /arch/powerpc
parent59613526117b0595cb7b04835390ecd5175f9cd4 (diff)
downloadlinux-683ec0e04ab7e2d86d2656c71322dfb2ebf063fc.tar.xz
powerpc/papr_scm: Update DT properties
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> [mpe: Use kernel types (u32/u64)] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/platforms/pseries/papr_scm.c16
1 files 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..de47e3719c8d 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;
+ u32 drc_index, metadata_size;
+ u64 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;