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| author | Christophe Kerello <christophe.kerello@foss.st.com> | 2024-02-26 11:14:28 +0100 |
|---|---|---|
| committer | Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> | 2024-02-27 10:18:04 +0100 |
| commit | e46076906722ee6f9e7fd5abad7f909cd11a26af (patch) | |
| tree | 83d27f9c6977566e31e8e4f40bfee7f67486c9e8 /drivers/memory | |
| parent | cc7d5cf8021983a736f9d963dda2dd45de02b395 (diff) | |
| download | linux-e46076906722ee6f9e7fd5abad7f909cd11a26af.tar.gz | |
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>
Diffstat (limited to 'drivers/memory')
| -rw-r--r-- | drivers/memory/stm32-fmc2-ebi.c | 41 |
1 files changed, 32 insertions, 9 deletions
diff --git a/drivers/memory/stm32-fmc2-ebi.c b/drivers/memory/stm32-fmc2-ebi.c index 45c658af613d2c..1c63eeacd071cc 100644 --- a/drivers/memory/stm32-fmc2-ebi.c +++ b/drivers/memory/stm32-fmc2-ebi.c @@ -11,6 +11,7 @@ #include <linux/of_platform.h> #include <linux/pinctrl/consumer.h> #include <linux/platform_device.h> +#include <linux/pm_runtime.h> #include <linux/regmap.h> #include <linux/reset.h> @@ -1649,6 +1650,7 @@ static int stm32_fmc2_ebi_probe(struct platform_device *pdev) return -ENOMEM; ebi->dev = dev; + platform_set_drvdata(pdev, ebi); ebi->data = of_device_get_match_data(dev); if (!ebi->data) @@ -1666,10 +1668,14 @@ static int stm32_fmc2_ebi_probe(struct platform_device *pdev) if (PTR_ERR(rstc) == -EPROBE_DEFER) return -EPROBE_DEFER; - ret = clk_prepare_enable(ebi->clk); + ret = devm_pm_runtime_enable(dev); if (ret) return ret; + ret = pm_runtime_resume_and_get(dev); + if (ret < 0) + return ret; + if (!IS_ERR(rstc)) { reset_control_assert(rstc); reset_control_deassert(rstc); @@ -1705,8 +1711,6 @@ static int stm32_fmc2_ebi_probe(struct platform_device *pdev) if (ret) goto err_release; - platform_set_drvdata(pdev, ebi); - return 0; err_release: @@ -1714,7 +1718,7 @@ err_release: stm32_fmc2_ebi_disable(ebi); if (ebi->data->put_sems) ebi->data->put_sems(ebi); - clk_disable_unprepare(ebi->clk); + pm_runtime_put_sync_suspend(dev); return ret; } @@ -1728,7 +1732,23 @@ static void stm32_fmc2_ebi_remove(struct platform_device *pdev) stm32_fmc2_ebi_disable(ebi); if (ebi->data->put_sems) ebi->data->put_sems(ebi); + pm_runtime_put_sync_suspend(&pdev->dev); +} + +static int __maybe_unused stm32_fmc2_ebi_runtime_suspend(struct device *dev) +{ + struct stm32_fmc2_ebi *ebi = dev_get_drvdata(dev); + clk_disable_unprepare(ebi->clk); + + return 0; +} + +static int __maybe_unused stm32_fmc2_ebi_runtime_resume(struct device *dev) +{ + struct stm32_fmc2_ebi *ebi = dev_get_drvdata(dev); + + return clk_prepare_enable(ebi->clk); } static int __maybe_unused stm32_fmc2_ebi_suspend(struct device *dev) @@ -1738,7 +1758,7 @@ static int __maybe_unused stm32_fmc2_ebi_suspend(struct device *dev) stm32_fmc2_ebi_disable(ebi); if (ebi->data->put_sems) ebi->data->put_sems(ebi); - clk_disable_unprepare(ebi->clk); + pm_runtime_put_sync_suspend(dev); pinctrl_pm_select_sleep_state(dev); return 0; @@ -1751,8 +1771,8 @@ static int __maybe_unused stm32_fmc2_ebi_resume(struct device *dev) pinctrl_pm_select_default_state(dev); - ret = clk_prepare_enable(ebi->clk); - if (ret) + ret = pm_runtime_resume_and_get(dev); + if (ret < 0) return ret; if (ebi->data->get_sems) @@ -1763,8 +1783,11 @@ static int __maybe_unused stm32_fmc2_ebi_resume(struct device *dev) return 0; } -static SIMPLE_DEV_PM_OPS(stm32_fmc2_ebi_pm_ops, stm32_fmc2_ebi_suspend, - stm32_fmc2_ebi_resume); +static const struct dev_pm_ops stm32_fmc2_ebi_pm_ops = { + SET_RUNTIME_PM_OPS(stm32_fmc2_ebi_runtime_suspend, + stm32_fmc2_ebi_runtime_resume, NULL) + SET_SYSTEM_SLEEP_PM_OPS(stm32_fmc2_ebi_suspend, stm32_fmc2_ebi_resume) +}; static const struct stm32_fmc2_ebi_data stm32_fmc2_ebi_mp1_data = { .child_props = stm32_fmc2_child_props, |