diff options
| author | Alex Elder <elder@riscstar.com> | 2025-04-11 23:38:27 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-04-15 15:38:14 +0300 |
| commit | 926040da60642335969ff99fa2ba67e4e0bb2618 (patch) | |
| tree | 5ff1daf8dcfbfcf3c1e2076be30787a555b72c4e | |
| parent | 66f5f70ce07a5c4ad88709dc34c072673aaafa25 (diff) | |
| download | linux-926040da60642335969ff99fa2ba67e4e0bb2618.tar.xz | |
serial: 8250_of: manage bus clock in suspend/resume
Save the bus clock pointer in the of_serial_info structure, and use
that to disable the bus clock on suspend and re-enable it on resume.
Signed-off-by: Alex Elder <elder@riscstar.com>
Reviewed-by: Andy Shevchenko <andy@kernel.org>
Reviewed-by: Yixun Lan <dlan@gentoo.org>
Link: https://lore.kernel.org/r/20250411203828.1491595-4-elder@riscstar.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/tty/serial/8250/8250_of.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/tty/serial/8250/8250_of.c b/drivers/tty/serial/8250/8250_of.c index a90a5462aa72..d178b6c54ea1 100644 --- a/drivers/tty/serial/8250/8250_of.c +++ b/drivers/tty/serial/8250/8250_of.c @@ -24,6 +24,7 @@ struct of_serial_info { struct clk *clk; + struct clk *bus_clk; struct reset_control *rst; int type; int line; @@ -138,6 +139,7 @@ static int of_platform_serial_setup(struct platform_device *ofdev, goto err_pmruntime; } + info->bus_clk = bus_clk; port->uartclk = clk_get_rate(info->clk); } /* If current-speed was set, then try not to change it. */ @@ -299,6 +301,7 @@ static int of_serial_suspend(struct device *dev) if (!uart_console(port) || console_suspend_enabled) { pm_runtime_put_sync(dev); clk_disable_unprepare(info->clk); + clk_disable_unprepare(info->bus_clk); } return 0; } @@ -311,6 +314,7 @@ static int of_serial_resume(struct device *dev) if (!uart_console(port) || console_suspend_enabled) { pm_runtime_get_sync(dev); + clk_prepare_enable(info->bus_clk); clk_prepare_enable(info->clk); } |