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Subject[PATCH 11/15] x86, olpc: Use a correct version when making up a battery node
Date
The XO-1 and XO-1.5 batteries apparently differ in an ability to report
ambient temperature. Add a different compatible string to the 1.5
battery.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
---
arch/x86/platform/olpc/olpc_dt.c | 59 +++++++++++++++++++++++---------
1 file changed, 42 insertions(+), 17 deletions(-)

diff --git a/arch/x86/platform/olpc/olpc_dt.c b/arch/x86/platform/olpc/olpc_dt.c
index d6ee92986920..6e54e116b0c5 100644
--- a/arch/x86/platform/olpc/olpc_dt.c
+++ b/arch/x86/platform/olpc/olpc_dt.c
@@ -218,10 +218,28 @@ static u32 __init olpc_dt_get_board_revision(void)
return be32_to_cpu(rev);
}

-void __init olpc_dt_fixup(void)
+int olpc_dt_compatible_match(phandle node, const char *compat)
{
- int r;
char buf[64];
+ int plen;
+ char *p;
+ int len;
+
+ plen = olpc_dt_getproperty(node, "compatible", buf, sizeof(buf));
+ if (plen <= 0)
+ return 0;
+
+ len = strlen(compat);
+ for (p = buf; p < buf + plen; p += strlen(p) + 1) {
+ if (strcmp(p, compat) == 0)
+ return 1;
+ }
+
+ return 0;
+}
+
+void __init olpc_dt_fixup(void)
+{
phandle node;
u32 board_rev;

@@ -229,32 +247,33 @@ void __init olpc_dt_fixup(void)
if (!node)
return;

- /*
- * If the battery node has a compatible property, we are running a new
- * enough firmware and don't have fixups to make.
- */
- r = olpc_dt_getproperty(node, "compatible", buf, sizeof(buf));
- if (r > 0)
- return;
-
- pr_info("PROM DT: Old firmware detected, applying fixes\n");
-
- /* Add olpc,xo1-battery compatible marker to battery node */
- olpc_dt_interpret("\" /battery@0\" find-device"
- " \" olpc,xo1-battery\" +compatible"
- " device-end");
-
board_rev = olpc_dt_get_board_revision();
if (!board_rev)
return;

if (board_rev >= olpc_board_pre(0xd0)) {
+ if (olpc_dt_compatible_match(node, "olpc,xo1.5-battery"))
+ return;
+
+ /* Add olpc,xo1.5-battery compatible marker to battery node */
+ olpc_dt_interpret("\" /battery@0\" find-device"
+ " \" olpc,xo1.5-battery\" +compatible"
+ " device-end");
+
+ /* We're running a very old firmware if this is missing. */
+ if (olpc_dt_compatible_match(node, "olpc,xo1-battery"))
+ return;
+
/* XO-1.5: add dcon device */
olpc_dt_interpret("\" /pci/display@1\" find-device"
" new-device"
" \" dcon\" device-name \" olpc,xo1-dcon\" +compatible"
" finish-device device-end");
} else {
+ /* We're running a very old firmware if this is missing. */
+ if (olpc_dt_compatible_match(node, "olpc,xo1-battery"))
+ return;
+
/* XO-1: add dcon device, mark RTC as olpc,xo1-rtc */
olpc_dt_interpret("\" /pci/display@1,1\" find-device"
" new-device"
@@ -264,6 +283,11 @@ void __init olpc_dt_fixup(void)
" \" olpc,xo1-rtc\" +compatible"
" device-end");
}
+
+ /* Add olpc,xo1-battery compatible marker to battery node */
+ olpc_dt_interpret("\" /battery@0\" find-device"
+ " \" olpc,xo1-battery\" +compatible"
+ " device-end");
}

void __init olpc_dt_build_devicetree(void)
@@ -289,6 +313,7 @@ void __init olpc_dt_build_devicetree(void)
/* A list of DT node/bus matches that we want to expose as platform devices */
static struct of_device_id __initdata of_ids[] = {
{ .compatible = "olpc,xo1-battery" },
+ { .compatible = "olpc,xo1.5-battery" },
{ .compatible = "olpc,xo1-dcon" },
{ .compatible = "olpc,xo1-rtc" },
{},
--
2.19.0
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