Re: [PATCH 07/31] serial: qcom_geni_serial: convert to use devm_pm_opp_* API

Viresh Kumar
2021-01-04T07:20:10Z

On 01-01-21, 16:54, Yangtao Li wrote:
> Use devm_pm_opp_* API to simplify code, and we don't need
> to make opp_table glabal.
>
> Let's remove opp_table from geni_se later.
>
> Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
> ---
> drivers/tty/serial/qcom_geni_serial.c | 23 +++++++++--------------
> 1 file changed, 9 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
> index 5aada7ebae35..36a92df8ec11 100644
> --- a/drivers/tty/serial/qcom_geni_serial.c
> +++ b/drivers/tty/serial/qcom_geni_serial.c
> @@ -1352,6 +1352,7 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
> int irq;
> bool console = false;
> struct uart_driver *drv;
> + struct opp_table *opp_table;
>
> if (of_device_is_compatible(pdev->dev.of_node, "qcom,geni-debug-uart"))
> console = true;
> @@ -1433,13 +1434,13 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
> if (of_property_read_bool(pdev->dev.of_node, "cts-rts-swap"))
> port->cts_rts_swap = true;
>
> - port->se.opp_table = dev_pm_opp_set_clkname(&pdev->dev, "se");
> - if (IS_ERR(port->se.opp_table))
> - return PTR_ERR(port->se.opp_table);
> + opp_table = devm_pm_opp_set_clkname(&pdev->dev, "se");
> + if (IS_ERR(opp_table))
> + return PTR_ERR(opp_table);
> /* OPP table is optional */
> - ret = dev_pm_opp_of_add_table(&pdev->dev);
> + ret = devm_pm_opp_of_add_table(&pdev->dev);
> if (ret) {
> - dev_pm_opp_put_clkname(port->se.opp_table);
> + devm_pm_opp_put_clkname(&pdev->dev, opp_table);

We shouldn't be doing this here, i.e. put_clkname. Even when the OPP
table isn't present, this driver calls dev_pm_opp_set_rate() which
behaves like clk_set_rate() in this case and so the clk name is still
required by the OPP core.

> if (ret != -ENODEV) {
> dev_err(&pdev->dev, "invalid OPP table in device tree\n");
> return ret;
> @@ -1453,7 +1454,7 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
>
> ret = uart_add_one_port(drv, uport);
> if (ret)
> - goto err;
> + return ret;
>
> irq_set_status_flags(uport->irq, IRQ_NOAUTOEN);
> ret = devm_request_irq(uport->dev, uport->irq, qcom_geni_serial_isr,
> @@ -1461,7 +1462,7 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
> if (ret) {
> dev_err(uport->dev, "Failed to get IRQ ret %d\n", ret);
> uart_remove_one_port(drv, uport);
> - goto err;
> + return ret;
> }
>
> /*
> @@ -1478,15 +1479,11 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
> if (ret) {
> device_init_wakeup(&pdev->dev, false);
> uart_remove_one_port(drv, uport);
> - goto err;
> + return ret;
> }
> }
>
> return 0;
> -err:
> - dev_pm_opp_of_remove_table(&pdev->dev);
> - dev_pm_opp_put_clkname(port->se.opp_table);
> - return ret;
> }
>
> static int qcom_geni_serial_remove(struct platform_device *pdev)
> @@ -1494,8 +1491,6 @@ static int qcom_geni_serial_remove(struct platform_device *pdev)
> struct qcom_geni_serial_port *port = platform_get_drvdata(pdev);
> struct uart_driver *drv = port->private_data.drv;
>
> - dev_pm_opp_of_remove_table(&pdev->dev);
> - dev_pm_opp_put_clkname(port->se.opp_table);
> dev_pm_clear_wake_irq(&pdev->dev);
> device_init_wakeup(&pdev->dev, false);
> uart_remove_one_port(drv, &port->uport);
> --
> 2.25.1

--
viresh