diff options
Diffstat (limited to 'drivers/bus/ti-sysc.c')
| -rw-r--r-- | drivers/bus/ti-sysc.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c index 0c9b9bcd75b2..4c1e59e53a0c 100644 --- a/drivers/bus/ti-sysc.c +++ b/drivers/bus/ti-sysc.c @@ -213,6 +213,21 @@ static int sysc_check_children(struct sysc *ddata) return 0; } +/* + * So far only I2C uses 16-bit read access with clockactivity with revision + * in two registers with stride of 4. We can detect this based on the rev + * register size to configure things far enough to be able to properly read + * the revision register. + */ +static void sysc_check_quirk_16bit(struct sysc *ddata, struct resource *res) +{ + if (resource_size(res) == 8) { + dev_dbg(ddata->dev, + "enabling 16-bit and clockactivity quirks\n"); + ddata->cfg.quirks |= SYSC_QUIRK_16BIT | SYSC_QUIRK_USE_CLOCKACT; + } +} + /** * sysc_parse_one - parses the interconnect target module registers * @ddata: device driver data @@ -243,6 +258,8 @@ static int sysc_parse_one(struct sysc *ddata, enum sysc_registers reg) } ddata->offsets[reg] = res->start - ddata->module_pa; + if (reg == SYSC_REVISION) + sysc_check_quirk_16bit(ddata, res); return 0; } |
