From cba3902b0c3df42969231358a5e8b3d40212b7ad Mon Sep 17 00:00:00 2001 From: Dmitry Osipenko Date: Wed, 11 Nov 2020 04:14:33 +0300 Subject: [PATCH] memory: tegra20-emc: Factor out clk initialization Factor out clk initialization and make it resource-managed. This makes easier to follow code and will help to make further changes cleaner. Signed-off-by: Dmitry Osipenko Link: https://lore.kernel.org/r/20201111011456.7875-4-digetx@gmail.com Signed-off-by: Krzysztof Kozlowski --- drivers/memory/tegra/tegra20-emc.c | 70 ++++++++++++++++++++---------- 1 file changed, 47 insertions(+), 23 deletions(-) diff --git a/drivers/memory/tegra/tegra20-emc.c b/drivers/memory/tegra/tegra20-emc.c index bb3f315c958797..d01b556a6d06ed 100644 --- a/drivers/memory/tegra/tegra20-emc.c +++ b/drivers/memory/tegra/tegra20-emc.c @@ -960,6 +960,49 @@ static int tegra_emc_opp_table_init(struct tegra_emc *emc) return err; } +static void devm_tegra_emc_unset_callback(void *data) +{ + tegra20_clk_set_emc_round_callback(NULL, NULL); +} + +static void devm_tegra_emc_unreg_clk_notifier(void *data) +{ + struct tegra_emc *emc = data; + + clk_notifier_unregister(emc->clk, &emc->clk_nb); +} + +static int tegra_emc_init_clk(struct tegra_emc *emc) +{ + int err; + + tegra20_clk_set_emc_round_callback(emc_round_rate, emc); + + err = devm_add_action_or_reset(emc->dev, devm_tegra_emc_unset_callback, + NULL); + if (err) + return err; + + emc->clk = devm_clk_get(emc->dev, NULL); + if (IS_ERR(emc->clk)) { + dev_err(emc->dev, "failed to get EMC clock: %pe\n", emc->clk); + return PTR_ERR(emc->clk); + } + + err = clk_notifier_register(emc->clk, &emc->clk_nb); + if (err) { + dev_err(emc->dev, "failed to register clk notifier: %d\n", err); + return err; + } + + err = devm_add_action_or_reset(emc->dev, + devm_tegra_emc_unreg_clk_notifier, emc); + if (err) + return err; + + return 0; +} + static int tegra_emc_probe(struct platform_device *pdev) { struct device_node *np; @@ -1003,25 +1046,13 @@ static int tegra_emc_probe(struct platform_device *pdev) return err; } - tegra20_clk_set_emc_round_callback(emc_round_rate, emc); - - emc->clk = devm_clk_get(&pdev->dev, "emc"); - if (IS_ERR(emc->clk)) { - err = PTR_ERR(emc->clk); - dev_err(&pdev->dev, "failed to get emc clock: %d\n", err); - goto unset_cb; - } - - err = clk_notifier_register(emc->clk, &emc->clk_nb); - if (err) { - dev_err(&pdev->dev, "failed to register clk notifier: %d\n", - err); - goto unset_cb; - } + err = tegra_emc_init_clk(emc); + if (err) + return err; err = tegra_emc_opp_table_init(emc); if (err) - goto unreg_notifier; + return err; platform_set_drvdata(pdev, emc); tegra_emc_rate_requests_init(emc); @@ -1036,13 +1067,6 @@ static int tegra_emc_probe(struct platform_device *pdev) try_module_get(THIS_MODULE); return 0; - -unreg_notifier: - clk_notifier_unregister(emc->clk, &emc->clk_nb); -unset_cb: - tegra20_clk_set_emc_round_callback(NULL, NULL); - - return err; } static const struct of_device_id tegra_emc_of_match[] = {