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Detect MC13892 chip ID in mc13xxx_query_revision() 

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Alexander Shiyan 2012-04-10 23:44:11 +04:00 committed by Sascha Hauer
parent f2215e9241
commit dc505f7e20
1 changed files with 23 additions and 14 deletions
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37
drivers/mfd/mc13xxx.c
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@ -234,30 +234,39 @@ static struct mc13892_rev mc13892_revisions[] = {
static int mc13xxx_query_revision(struct mc13xxx *mc13xxx)
{
unsigned int rev_id;
char *revstr;
char *chipname, *revstr;
int rev, i;
mc13xxx_reg_read(mc13xxx, MC13892_REG_IDENTIFICATION, &rev_id);
for (i = 0; i < ARRAY_SIZE(mc13892_revisions); i++)
if ((rev_id & 0x1f) == mc13892_revisions[i].rev_id)
break;
/* Determine chip type by decode ICID bits */
switch ((rev_id >> 6) & 0x7) {
case 7:
chipname = "MC13892";
for (i = 0; i < ARRAY_SIZE(mc13892_revisions); i++)
if ((rev_id & 0x1f) == mc13892_revisions[i].rev_id)
break;
if (i == ARRAY_SIZE(mc13892_revisions))
return -EINVAL;
if (i == ARRAY_SIZE(mc13892_revisions))
return -EINVAL;
rev = mc13892_revisions[i].rev;
revstr = mc13892_revisions[i].revstr;
rev = mc13892_revisions[i].rev;
revstr = mc13892_revisions[i].revstr;
if (rev == MC13892_REVISION_2_0) {
if ((rev_id >> 9) & 0x3) {
rev = MC13892_REVISION_2_0a;
revstr = "2.0a";
if (rev == MC13892_REVISION_2_0) {
if ((rev_id >> 9) & 0x3) {
rev = MC13892_REVISION_2_0a;
revstr = "2.0a";
}
}
break;
default:
dev_info(mc_dev->cdev.dev, "No PMIC detected.\n");
return -EINVAL;
}
dev_info(mc_dev->cdev.dev, "PMIC ID: 0x%08x [Rev: %s]\n",
rev_id, revstr);
dev_info(mc_dev->cdev.dev, "Found %s ID: 0x%06x [Rev: %s]\n",
chipname, rev_id, revstr);
mc13xxx->revision = rev;