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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 committed by Alexandre Bard
parent 69e9c386dd
commit f47237771c
1 changed files with 7 additions and 4 deletions
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11
board/nm/nmhw21/mux.c
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@ -38,7 +38,7 @@ static struct module_pin_mux gpio_pin_mux[] = {
* (T16) GPIO1_26: WLAN_EN
* (V17) GPIO1_27: WLAN_IRQ
*
* (U3) GPIO2_16: TIMEPULSE (HW26)
* (U3) GPIO2_16: TIMEPULSE (HW26), see note [1]
* (R6) GPIO2_25: RST_ETH~
*
* (J17) GPIO3_4: GNSS_EXTINT
@ -46,6 +46,9 @@ static struct module_pin_mux gpio_pin_mux[] = {
* (L18) GPIO3_10: CTRL.RST
* (C12) GPIO3_17: UI_RST~
* (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 */
@ -65,7 +68,7 @@ static struct module_pin_mux gpio_pin_mux[] = {
{OFFSET(gpmc_a11), (MODE(7) | PULLUDDIS | RXACTIVE)}, /* (V17) gpio1_27: WLAN_IRQ */
/* 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~ */
/* Bank 3 */
@ -215,8 +218,8 @@ static struct module_pin_mux uart2_pin_mux[] = {
/* UART3: GNSS */
static struct module_pin_mux uart3_pin_mux[] = {
{OFFSET(mii1_rxd3), (MODE(1) | PULLUDEN | PULLUP_EN | RXACTIVE)}, /* (L17) UART3_RXD */
{OFFSET(mii1_rxd2), (MODE(1) | PULLUDEN | PULLUP_EN | SLEWCTRL)}, /* (L16) UART3_TXD */
{OFFSET(mii1_rxd3), (MODE(1) | PULLUDDIS | RXACTIVE)}, /* (L17) UART3_RXD */
{OFFSET(mii1_rxd2), (MODE(1) | PULLUDDIS | SLEWCTRL)}, /* (L16) UART3_TXD */
{-1}
};