diff options
Diffstat (limited to 'board/hoho/usb_pd_policy.c')
| -rw-r--r-- | board/hoho/usb_pd_policy.c | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/board/hoho/usb_pd_policy.c b/board/hoho/usb_pd_policy.c index b1279d76a9..252bef6ac7 100644 --- a/board/hoho/usb_pd_policy.c +++ b/board/hoho/usb_pd_policy.c @@ -25,6 +25,11 @@ const uint32_t pd_src_pdo[] = {}; const int pd_src_pdo_cnt = ARRAY_SIZE(pd_src_pdo); +/* Define typical operating power and max power */ +#define OPERATING_POWER_MW 1000 +#define MAX_POWER_MW 1500 +#define MAX_CURRENT_MA 300 + /* Fake PDOs : we just want our pre-defined voltages */ const uint32_t pd_snk_pdo[] = { PDO_FIXED(5000, 500, 0), @@ -43,6 +48,8 @@ int pd_choose_voltage(int cnt, uint32_t *src_caps, uint32_t *rdo, int i; int ma; int set_mv = select_mv; + int max; + uint32_t flags; /* Default to 5V */ if (set_mv <= 0) @@ -58,11 +65,19 @@ int pd_choose_voltage(int cnt, uint32_t *src_caps, uint32_t *rdo, if (i < 0) return -EC_ERROR_UNKNOWN; - /* request all the power ... */ + /* build rdo for desired power */ ma = 10 * (src_caps[i] & 0x3FF); - *rdo = RDO_FIXED(i + 1, ma, ma, 0); - CPRINTF("Request [%d] %dV %dmA\n", i, set_mv/1000, ma); - *curr_limit = ma; + max = MIN(ma, MAX_CURRENT_MA); + flags = (max * set_mv) < (1000 * OPERATING_POWER_MW) ? + RDO_CAP_MISMATCH : 0; + *rdo = RDO_FIXED(i + 1, max, max, 0); + CPRINTF("Request [%d] %dV %dmA", i, set_mv/1000, max); + /* Mismatch bit set if less power offered than the operating power */ + if (flags & RDO_CAP_MISMATCH) + CPRINTF(" Mismatch"); + CPRINTF("\n"); + + *curr_limit = max; *supply_voltage = set_mv; return EC_SUCCESS; } |