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a=openpgp; fpr=169DEB6C0BC3C46013D2C79F11A72EA01471D772 From: Bartosz Golaszewski There are clock users in the kernel that can't use devm_clk_get_optional_enabled() as they need to set rate after getting the clock and before enabling it. Provide a managed helper that wraps these operations in the correct order. Signed-off-by: Bartosz Golaszewski --- drivers/clk/clk-devres.c | 28 ++++++++++++++++++++++++++++ include/linux/clk.h | 26 ++++++++++++++++++++++++++ 2 files changed, 54 insertions(+) diff --git a/drivers/clk/clk-devres.c b/drivers/clk/clk-devres.c index 90e6078fb6e1..34e800525e21 100644 --- a/drivers/clk/clk-devres.c +++ b/drivers/clk/clk-devres.c @@ -99,6 +99,34 @@ struct clk *devm_clk_get_optional_enabled(struct device = *dev, const char *id) } EXPORT_SYMBOL_GPL(devm_clk_get_optional_enabled); =20 +struct clk *devm_clk_get_optional_enabled_with_rate(struct device *dev, + const char *id, + unsigned long rate) +{ + struct clk *clk; + int ret; + + clk =3D __devm_clk_get(dev, id, clk_get_optional, NULL, + clk_disable_unprepare); + if (IS_ERR(clk)) + return ERR_CAST(clk); + + ret =3D clk_set_rate(clk, rate); + if (ret) + goto out_put_clk; + + ret =3D clk_prepare_enable(clk); + if (ret) + goto out_put_clk; + + return clk; + +out_put_clk: + devm_clk_put(dev, clk); + return ERR_PTR(ret); +} +EXPORT_SYMBOL(devm_clk_get_optional_enabled_with_rate); + struct clk_bulk_devres { struct clk_bulk_data *clks; int num_clks; diff --git a/include/linux/clk.h b/include/linux/clk.h index 0fa56d672532..c8d237e9b8d4 100644 --- a/include/linux/clk.h +++ b/include/linux/clk.h @@ -640,6 +640,32 @@ struct clk *devm_clk_get_optional_prepared(struct devi= ce *dev, const char *id); */ struct clk *devm_clk_get_optional_enabled(struct device *dev, const char *= id); =20 +/** + * devm_clk_get_optional_enabled_with_rate - devm_clk_get_optional() + + * clk_set_rate() + + * clk_prepare_enable() + * @dev: device for clock "consumer" + * @id: clock consumer ID + * @rate: new clock rate + * + * Context: May sleep. + * + * Return: a struct clk corresponding to the clock producer, or + * valid IS_ERR() condition containing errno. The implementation + * uses @dev and @id to determine the clock consumer, and thereby + * the clock producer. If no such clk is found, it returns NULL + * which serves as a dummy clk. That's the only difference compared + * to devm_clk_get_enabled(). + * + * The returned clk (if valid) is prepared and enabled and rate was set. + * + * The clock will automatically be disabled, unprepared and freed + * when the device is unbound from the bus. + */ +struct clk *devm_clk_get_optional_enabled_with_rate(struct device *dev, + const char *id, + unsigned long rate); + /** * devm_get_clk_from_child - lookup and obtain a managed reference to a * clock producer from child node. --=20 2.43.0 From nobody Wed Oct 30 22:11:37 2024 Received: from mail-wm1-f42.google.com (mail-wm1-f42.google.com [209.85.128.42]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 98B841B3F27 for ; Thu, 1 Aug 2024 15:59:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.42 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722527946; 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a=openpgp; fpr=169DEB6C0BC3C46013D2C79F11A72EA01471D772 From: Bartosz Golaszewski Use the new devm_clk_get_optional_enabled_with_rate() clock helper to shrink the code a bit. Signed-off-by: Bartosz Golaszewski --- drivers/bluetooth/hci_qca.c | 24 ++---------------------- 1 file changed, 2 insertions(+), 22 deletions(-) diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c index ca6466676902..0670f527909c 100644 --- a/drivers/bluetooth/hci_qca.c +++ b/drivers/bluetooth/hci_qca.c @@ -2297,13 +2297,6 @@ static int qca_init_regulators(struct qca_power *qca, return 0; } =20 -static void qca_clk_disable_unprepare(void *data) -{ - struct clk *clk =3D data; - - clk_disable_unprepare(clk); -} - static int qca_serdev_probe(struct serdev_device *serdev) { struct qca_serdev *qcadev; @@ -2433,25 +2426,12 @@ static int qca_serdev_probe(struct serdev_device *s= erdev) if (!qcadev->bt_en) power_ctrl_enabled =3D false; =20 - qcadev->susclk =3D devm_clk_get_optional(&serdev->dev, NULL); + qcadev->susclk =3D devm_clk_get_optional_enabled_with_rate( + &serdev->dev, NULL, SUSCLK_RATE_32KHZ); if (IS_ERR(qcadev->susclk)) { dev_warn(&serdev->dev, "failed to acquire clk\n"); return PTR_ERR(qcadev->susclk); } - err =3D clk_set_rate(qcadev->susclk, SUSCLK_RATE_32KHZ); - if (err) - return err; - - err =3D clk_prepare_enable(qcadev->susclk); - if (err) - return err; - - err =3D devm_add_action_or_reset(&serdev->dev, - qca_clk_disable_unprepare, - qcadev->susclk); - if (err) - return err; - } =09 err =3D hci_uart_register_device(&qcadev->serdev_hu, &qca_proto); --=20 2.43.0