memory: stm32-fmc2-ebi: keep power domain on
MP25 FMC2 domain has to be kept on. To handle it throw PSCI OS-initiated, basic PM for keeping domain on is introduced. Signed-off-by: Christophe Kerello <christophe.kerello@foss.st.com> Link: https://lore.kernel.org/r/20240226101428.37791-6-christophe.kerello@foss.st.com Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
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@ -11,6 +11,7 @@
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#include <linux/of_platform.h>
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#include <linux/pinctrl/consumer.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include <linux/regmap.h>
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#include <linux/reset.h>
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@ -1649,6 +1650,7 @@ static int stm32_fmc2_ebi_probe(struct platform_device *pdev)
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return -ENOMEM;
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ebi->dev = dev;
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platform_set_drvdata(pdev, ebi);
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ebi->data = of_device_get_match_data(dev);
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if (!ebi->data)
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@ -1666,10 +1668,14 @@ static int stm32_fmc2_ebi_probe(struct platform_device *pdev)
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if (PTR_ERR(rstc) == -EPROBE_DEFER)
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return -EPROBE_DEFER;
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ret = clk_prepare_enable(ebi->clk);
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ret = devm_pm_runtime_enable(dev);
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if (ret)
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return ret;
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ret = pm_runtime_resume_and_get(dev);
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if (ret < 0)
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return ret;
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if (!IS_ERR(rstc)) {
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reset_control_assert(rstc);
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reset_control_deassert(rstc);
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@ -1705,8 +1711,6 @@ static int stm32_fmc2_ebi_probe(struct platform_device *pdev)
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if (ret)
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goto err_release;
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platform_set_drvdata(pdev, ebi);
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return 0;
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err_release:
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@ -1714,7 +1718,7 @@ err_release:
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stm32_fmc2_ebi_disable(ebi);
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if (ebi->data->put_sems)
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ebi->data->put_sems(ebi);
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clk_disable_unprepare(ebi->clk);
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pm_runtime_put_sync_suspend(dev);
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return ret;
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}
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@ -1728,7 +1732,23 @@ static void stm32_fmc2_ebi_remove(struct platform_device *pdev)
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stm32_fmc2_ebi_disable(ebi);
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if (ebi->data->put_sems)
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ebi->data->put_sems(ebi);
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pm_runtime_put_sync_suspend(&pdev->dev);
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}
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static int __maybe_unused stm32_fmc2_ebi_runtime_suspend(struct device *dev)
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{
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struct stm32_fmc2_ebi *ebi = dev_get_drvdata(dev);
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clk_disable_unprepare(ebi->clk);
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return 0;
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}
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static int __maybe_unused stm32_fmc2_ebi_runtime_resume(struct device *dev)
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{
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struct stm32_fmc2_ebi *ebi = dev_get_drvdata(dev);
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return clk_prepare_enable(ebi->clk);
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}
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static int __maybe_unused stm32_fmc2_ebi_suspend(struct device *dev)
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@ -1738,7 +1758,7 @@ static int __maybe_unused stm32_fmc2_ebi_suspend(struct device *dev)
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stm32_fmc2_ebi_disable(ebi);
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if (ebi->data->put_sems)
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ebi->data->put_sems(ebi);
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clk_disable_unprepare(ebi->clk);
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pm_runtime_put_sync_suspend(dev);
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pinctrl_pm_select_sleep_state(dev);
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return 0;
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@ -1751,8 +1771,8 @@ static int __maybe_unused stm32_fmc2_ebi_resume(struct device *dev)
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pinctrl_pm_select_default_state(dev);
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ret = clk_prepare_enable(ebi->clk);
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if (ret)
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ret = pm_runtime_resume_and_get(dev);
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if (ret < 0)
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return ret;
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if (ebi->data->get_sems)
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@ -1763,8 +1783,11 @@ static int __maybe_unused stm32_fmc2_ebi_resume(struct device *dev)
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return 0;
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}
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static SIMPLE_DEV_PM_OPS(stm32_fmc2_ebi_pm_ops, stm32_fmc2_ebi_suspend,
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stm32_fmc2_ebi_resume);
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static const struct dev_pm_ops stm32_fmc2_ebi_pm_ops = {
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SET_RUNTIME_PM_OPS(stm32_fmc2_ebi_runtime_suspend,
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stm32_fmc2_ebi_runtime_resume, NULL)
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SET_SYSTEM_SLEEP_PM_OPS(stm32_fmc2_ebi_suspend, stm32_fmc2_ebi_resume)
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};
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static const struct stm32_fmc2_ebi_data stm32_fmc2_ebi_mp1_data = {
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.child_props = stm32_fmc2_child_props,
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