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x86/platform/olpc: Use a correct version when making up a battery node 

The XO-1 and XO-1.5 batteries apparently differ in an ability to report
ambient temperature. We need to use a different compatible string for the
XO-1.5 battery.

Previously olpc_dt_fixup() used the presence of the battery node's
compatible property to decide whether the DT is up to date. Now we need
to look for a particular value in the compatible string, to decide

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Acked-by: Pavel Machek <pavel@ucw.cz>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Lubomir Rintel 2019-04-18 16:46:49 +02:00 committed by Sebastian Reichel
parent 47e120d333
commit a7a9bacb9a
1 changed files with 50 additions and 14 deletions
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64
arch/x86/platform/olpc/olpc_dt.c
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@ -220,10 +220,26 @@ static u32 __init olpc_dt_get_board_revision(void)
return be32_to_cpu(rev);
}
int olpc_dt_compatible_match(phandle node, const char *compat)
{
char buf[64], *p;
int plen, 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)
{
int r;
char buf[64];
phandle node;
u32 board_rev;
@ -231,22 +247,31 @@ 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");
board_rev = olpc_dt_get_board_revision();
if (!board_rev)
return;
if (board_rev >= olpc_board_pre(0xd0)) {
/* XO-1.5: add dcon device */
/* XO-1.5 */
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_dt_interpret(" \" olpc,xo1.5-battery\" +compatible");
olpc_dt_interpret("device-end");
if (olpc_dt_compatible_match(node, "olpc,xo1-battery")) {
/*
* If we have a olpc,xo1-battery compatible, then we're
* running a new enough firmware that already has
* the dcon node.
*/
return;
}
/* Add dcon device */
olpc_dt_interpret("\" /pci/display@1\" find-device");
olpc_dt_interpret(" new-device");
olpc_dt_interpret(" \" dcon\" device-name");
@ -254,7 +279,18 @@ void __init olpc_dt_fixup(void)
olpc_dt_interpret(" finish-device");
olpc_dt_interpret("device-end");
} else {
/* XO-1: add dcon device, mark RTC as olpc,xo1-rtc */
/* XO-1 */
if (olpc_dt_compatible_match(node, "olpc,xo1-battery")) {
/*
* If we have a olpc,xo1-battery compatible, then we're
* running a new enough firmware that already has
* the dcon and RTC nodes.
*/
return;
}
/* Add dcon device, mark RTC as olpc,xo1-rtc */
olpc_dt_interpret("\" /pci/display@1,1\" find-device");
olpc_dt_interpret(" new-device");
olpc_dt_interpret(" \" dcon\" device-name");