| Harald Welte | 31f817c | 2017-02-03 22:21:32 +0100 | [diff] [blame^] | 1 | /* Code to control the PERST lines of attached modems |
| 2 | * |
| 3 | * Depending on the board this is running on, it might be possible |
| 4 | * for the controller to set the status of the PERST input line of |
| 5 | * the cellular modem. If the board supports this, it sets the |
| 6 | * PIN_PERST1 and/or PIN_PERST2 defines in its board.h file. |
| 7 | */ |
| 8 | |
| 9 | #include "board.h" |
| 10 | #include "wwan_perst.h" |
| 11 | |
| 12 | #ifdef PIN_PERST1 |
| 13 | static const Pin pin_perst1 = PIN_PERST1; |
| 14 | #endif |
| 15 | |
| 16 | #ifdef PIN_PERST2 |
| 17 | static const Pin pin_perst2 = PIN_PERST2; |
| 18 | #endif |
| 19 | |
| 20 | int wwan_perst_do_reset(int modem_nr) |
| 21 | { |
| 22 | static const Pin *pin; |
| 23 | |
| 24 | switch (modem_nr) { |
| 25 | #ifdef PIN_PERST1 |
| 26 | case 1: |
| 27 | pin = &pin_perst1; |
| 28 | break; |
| 29 | #endif |
| 30 | #ifdef PIN_PERST2 |
| 31 | case 2: |
| 32 | pin = &pin_perst2; |
| 33 | break; |
| 34 | #endif |
| 35 | default: |
| 36 | return -1; |
| 37 | } |
| 38 | PIO_Clear(pin); |
| 39 | mdelay(1); |
| 40 | PIO_Set(pin); |
| 41 | return 0; |
| 42 | } |
| 43 | |
| 44 | int wwan_perst_init(void) |
| 45 | { |
| 46 | int num_perst = 0; |
| 47 | #ifdef PIN_PERST1 |
| 48 | PIO_Configure(&pin_perst1, 1); |
| 49 | num_perst++; |
| 50 | #endif |
| 51 | |
| 52 | #ifdef PIN_PERST2 |
| 53 | PIO_Configure(&pin_perst2, 1); |
| 54 | num_perst++; |
| 55 | #endif |
| 56 | return num_perst; |
| 57 | } |