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serial: qcom-geni: Make UART port count configurable via Kconfig

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Replace the hardcoded GENI_UART_PORTS macro with a new Kconfig option
SERIAL_QCOM_GENI_UART_PORTS to allow platforms to configure the maximum
number of UART ports supported by the driver at build time.

This improves flexibility for platforms that require more than the
previously fixed number of UART ports, and avoids unnecessary allocation
for unused ports.

Signed-off-by: Zong Jiang <quic_zongjian@quicinc.com>
Link: https://lore.kernel.org/r/20250812054819.3748649-3-quic_zongjian@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Zong Jiang
2025-08-12 13:48:19 +08:00
committed by Greg Kroah-Hartman
parent c3e7966c60
commit 9391ab1ed9
2 changed files with 10 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/tty/serial/Kconfig
View File

@@ -928,6 +928,14 @@ config SERIAL_QCOM_GENI_CONSOLE
Serial console driver for Qualcomm Technologies Inc's GENI based
QUP hardware.
config SERIAL_QCOM_GENI_UART_PORTS
int "Maximum number of GENI UART ports"
depends on SERIAL_QCOM_GENI
default "8"
help
Set this to the maximum number of serial ports you want the driver
to support.
config SERIAL_VT8500
bool "VIA VT8500 on-chip serial port support"
depends on ARCH_VT8500 || COMPILE_TEST

5
drivers/tty/serial/qcom_geni_serial.c
View File

@@ -77,7 +77,6 @@
#define STALE_TIMEOUT 16
#define DEFAULT_BITS_PER_CHAR 10
#define GENI_UART_CONS_PORTS 1
#define GENI_UART_PORTS 3
#define DEF_FIFO_DEPTH_WORDS 16
#define DEF_TX_WM 2
#define DEF_FIFO_WIDTH_BITS 32
@@ -261,7 +260,7 @@ static const char *qcom_geni_serial_get_type(struct uart_port *uport)
static struct qcom_geni_serial_port *get_port_from_line(int line, bool console, struct device *dev)
{
struct qcom_geni_serial_port *port;
int nr_ports = console ? GENI_UART_CONS_PORTS : GENI_UART_PORTS;
int nr_ports = console ? GENI_UART_CONS_PORTS : CONFIG_SERIAL_QCOM_GENI_UART_PORTS;
if (console) {
if (line < 0 || line >= nr_ports)
@@ -1652,7 +1651,7 @@ static struct uart_driver qcom_geni_uart_driver = {
.owner = THIS_MODULE,
.driver_name = "qcom_geni_uart",
.dev_name = "ttyHS",
.nr = GENI_UART_PORTS,
.nr = CONFIG_SERIAL_QCOM_GENI_UART_PORTS,
};
static int geni_serial_resources_on(struct uart_port *uport)