[PATCH 6.1.y-cip 74/85] serial: sh-sci: Move runtime PM enable to sci_probe_single()

Tommaso Merciai
2025-03-13T01:33:26Z

From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>

commit 239f11209e5f282e16f5241b99256e25dd0614b6 upstream.

Relocate the runtime PM enable operation to sci_probe_single(). This change
prepares the codebase for upcoming fixes.

While at it, replace the existing logic with a direct call to
devm_pm_runtime_enable() and remove sci_cleanup_single(). The
devm_pm_runtime_enable() function automatically handles disabling runtime
PM during driver removal.

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Link: https://lore.kernel.org/r/20250116182249.3828577-3-claudiu.beznea.uj@bp.renesas.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/tty/serial/sh-sci.c | 24 ++++++------------------
1 file changed, 6 insertions(+), 18 deletions(-)

diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index 19fa3f8f4a6d..9aa1db20c700 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -3063,10 +3063,6 @@ static int sci_init_single(struct platform_device *dev,
ret = sci_init_clocks(sci_port, &dev->dev);
if (ret < 0)
return ret;
-
- port->dev = &dev->dev;
-
- pm_runtime_enable(&dev->dev);
}

port->type = p->type;
@@ -3096,11 +3092,6 @@ static int sci_init_single(struct platform_device *dev,
return 0;
}

-static void sci_cleanup_single(struct sci_port *port)
-{
- pm_runtime_disable(port->port.dev);
-}
-
#if defined(CONFIG_SERIAL_SH_SCI_CONSOLE) || \
defined(CONFIG_SERIAL_SH_SCI_EARLYCON)
static void serial_console_putchar(struct uart_port *port, unsigned char ch)
@@ -3258,8 +3249,6 @@ static int sci_remove(struct platform_device *dev)
sci_ports_in_use &= ~BIT(port->port.line);
uart_remove_one_port(&sci_uart_driver, &port->port);

- sci_cleanup_single(port);
-
if (port->port.fifosize > 1)
device_remove_file(&dev->dev, &dev_attr_rx_fifo_trigger);
if (type == PORT_SCIFA || type == PORT_SCIFB || type == PORT_HSCIF)
@@ -3425,6 +3414,11 @@ static int sci_probe_single(struct platform_device *dev,
if (ret)
return ret;

+ sciport->port.dev = &dev->dev;
+ ret = devm_pm_runtime_enable(&dev->dev);
+ if (ret)
+ return ret;
+
sciport->gpios = mctrl_gpio_init(&sciport->port, 0);
if (IS_ERR(sciport->gpios))
return PTR_ERR(sciport->gpios);
@@ -3438,13 +3432,7 @@ static int sci_probe_single(struct platform_device *dev,
sciport->port.flags |= UPF_HARD_FLOW;
}

- ret = uart_add_one_port(&sci_uart_driver, &sciport->port);
- if (ret) {
- sci_cleanup_single(sciport);
- return ret;
- }
-
- return 0;
+ return uart_add_one_port(&sci_uart_driver, &sciport->port);
}

static int sci_probe(struct platform_device *dev)
--
2.43.0