LM
/
u-boot
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

hw21/26: remove pulldown from timepulse input 

TIMEPULSE is internally connected with SAFEBOOT_N
in the GNSS modem. The pulldown pulls the signal so
low, that in some cases the modem starts in bootloader
mode.
Also remove pull ups from UART to avoid cross currents
at powerup.
This commit is contained in:
Rene Straub 2024-02-20 14:06:34 +01:00
parent 4e67fc3997
commit 250b26288e
1 changed files with 7 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
board/nm/nmhw21/mux.c
View File

@ -38,7 +38,7 @@ static struct module_pin_mux gpio_pin_mux[] = {
* (T16) GPIO1_26: WLAN_EN * (T16) GPIO1_26: WLAN_EN
* (V17) GPIO1_27: WLAN_IRQ * (V17) GPIO1_27: WLAN_IRQ
* *
* (U3) GPIO2_16: TIMEPULSE (HW26) * (U3) GPIO2_16: TIMEPULSE (HW26), see note [1]
* (R6) GPIO2_25: RST_ETH~ * (R6) GPIO2_25: RST_ETH~
* *
* (J17) GPIO3_4: GNSS_EXTINT * (J17) GPIO3_4: GNSS_EXTINT
@ -46,6 +46,9 @@ static struct module_pin_mux gpio_pin_mux[] = {
* (L18) GPIO3_10: CTRL.RST * (L18) GPIO3_10: CTRL.RST
* (C12) GPIO3_17: UI_RST~ * (C12) GPIO3_17: UI_RST~
* (A14) GPIO3_21: RST_HUB~ (USB) * (A14) GPIO3_21: RST_HUB~ (USB)
*
* [1] No PU/PD allowed as TIMEPULSE is internally connected with SAFEBOOT_N.
* SAFEBOOT_N must be left open/floating.
*/ */
/* Bank 0 */ /* Bank 0 */
@ -65,7 +68,7 @@ static struct module_pin_mux gpio_pin_mux[] = {
{OFFSET(gpmc_a11), (MODE(7) | PULLUDDIS | RXACTIVE)}, /* (V17) gpio1_27: WLAN_IRQ */ {OFFSET(gpmc_a11), (MODE(7) | PULLUDDIS | RXACTIVE)}, /* (V17) gpio1_27: WLAN_IRQ */
/* Bank 2 */ /* Bank 2 */
{OFFSET(lcd_data10), (MODE(7) | PULLUDEN | PULLDOWN_EN | RXACTIVE)}, /* (U3) GPIO2_16: TIMEPULSE input */ {OFFSET(lcd_data10), (MODE(7) | PULLUDDIS | RXACTIVE)}, /* (U3) GPIO2_16: TIMEPULSE */
{OFFSET(lcd_ac_bias_en), (MODE(7) | PULLUDDIS)}, /* (R6) GPIO2_25: RST_ETH~ */ {OFFSET(lcd_ac_bias_en), (MODE(7) | PULLUDDIS)}, /* (R6) GPIO2_25: RST_ETH~ */
/* Bank 3 */ /* Bank 3 */
@ -215,8 +218,8 @@ static struct module_pin_mux uart2_pin_mux[] = {
/* UART3: GNSS */ /* UART3: GNSS */
static struct module_pin_mux uart3_pin_mux[] = { static struct module_pin_mux uart3_pin_mux[] = {
{OFFSET(mii1_rxd3), (MODE(1) | PULLUDEN | PULLUP_EN | RXACTIVE)}, /* (L17) UART3_RXD */ {OFFSET(mii1_rxd3), (MODE(1) | PULLUDDIS | RXACTIVE)}, /* (L17) UART3_RXD */
{OFFSET(mii1_rxd2), (MODE(1) | PULLUDEN | PULLUP_EN | SLEWCTRL)}, /* (L16) UART3_TXD */ {OFFSET(mii1_rxd2), (MODE(1) | PULLUDDIS | SLEWCTRL)}, /* (L16) UART3_TXD */
{-1} {-1}
}; };