diff options
Diffstat (limited to 'drivers/tty/serial/qcom_geni_serial.c')
| -rw-r--r-- | drivers/tty/serial/qcom_geni_serial.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c index 83b66b73303a..b487823f0e61 100644 --- a/drivers/tty/serial/qcom_geni_serial.c +++ b/drivers/tty/serial/qcom_geni_serial.c @@ -924,6 +924,7 @@ static int qcom_geni_serial_port_setup(struct uart_port *uport) false, true, true); geni_se_init(&port->se, UART_RX_WM, port->rx_fifo_depth - 2); geni_se_select_mode(&port->se, GENI_SE_FIFO); + qcom_geni_serial_start_rx(uport); port->setup = true; return 0; @@ -1547,9 +1548,43 @@ static int __maybe_unused qcom_geni_serial_sys_resume(struct device *dev) return ret; } +static int qcom_geni_serial_sys_hib_resume(struct device *dev) +{ + int ret = 0; + struct uart_port *uport; + struct qcom_geni_private_data *private_data; + struct qcom_geni_serial_port *port = dev_get_drvdata(dev); + + uport = &port->uport; + private_data = uport->private_data; + + if (uart_console(uport)) { + geni_icc_set_tag(&port->se, 0x7); + geni_icc_set_bw(&port->se); + ret = uart_resume_port(private_data->drv, uport); + /* + * For hibernation usecase clients for + * console UART won't call port setup during restore, + * hence call port setup for console uart. + */ + qcom_geni_serial_port_setup(uport); + } else { + /* + * Peripheral register settings are lost during hibernation. + * Update setup flag such that port setup happens again + * during next session. Clients of HS-UART will close and + * open the port during hibernation. + */ + port->setup = false; + } + return ret; +} + static const struct dev_pm_ops qcom_geni_serial_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(qcom_geni_serial_sys_suspend, qcom_geni_serial_sys_resume) + .restore = qcom_geni_serial_sys_hib_resume, + .thaw = qcom_geni_serial_sys_hib_resume, }; static const struct of_device_id qcom_geni_serial_match_table[] = { |