diff options
Diffstat (limited to 'drivers/crypto/stm32/stm32-cryp.c')
| -rw-r--r-- | drivers/crypto/stm32/stm32-cryp.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/drivers/crypto/stm32/stm32-cryp.c b/drivers/crypto/stm32/stm32-cryp.c index c5d3efc54a4f..23b0b7bd64c7 100644 --- a/drivers/crypto/stm32/stm32-cryp.c +++ b/drivers/crypto/stm32/stm32-cryp.c @@ -11,6 +11,7 @@ #include <linux/module.h> #include <linux/of_device.h> #include <linux/platform_device.h> +#include <linux/pm_runtime.h> #include <linux/reset.h> #include <crypto/aes.h> @@ -105,6 +106,7 @@ #define GCM_CTR_INIT 2 #define _walked_in (cryp->in_walk.offset - cryp->in_sg->offset) #define _walked_out (cryp->out_walk.offset - cryp->out_sg->offset) +#define CRYP_AUTOSUSPEND_DELAY 50 struct stm32_cryp_caps { bool swap_final; @@ -519,6 +521,8 @@ static int stm32_cryp_hw_init(struct stm32_cryp *cryp) int ret; u32 cfg, hw_mode; + pm_runtime_get_sync(cryp->dev); + /* Disable interrupt */ stm32_cryp_write(cryp, CRYP_IMSCR, 0); @@ -638,6 +642,9 @@ static void stm32_cryp_finish_req(struct stm32_cryp *cryp, int err) free_pages((unsigned long)buf_out, pages); } + pm_runtime_mark_last_busy(cryp->dev); + pm_runtime_put_autosuspend(cryp->dev); + if (is_gcm(cryp) || is_ccm(cryp)) { crypto_finalize_aead_request(cryp->engine, cryp->areq, err); cryp->areq = NULL; @@ -1969,6 +1976,13 @@ static int stm32_cryp_probe(struct platform_device *pdev) return ret; } + pm_runtime_set_autosuspend_delay(dev, CRYP_AUTOSUSPEND_DELAY); + pm_runtime_use_autosuspend(dev); + + pm_runtime_get_noresume(dev); + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + rst = devm_reset_control_get(dev, NULL); if (!IS_ERR(rst)) { reset_control_assert(rst); @@ -2008,6 +2022,8 @@ static int stm32_cryp_probe(struct platform_device *pdev) dev_info(dev, "Initialized\n"); + pm_runtime_put_sync(dev); + return 0; err_aead_algs: @@ -2020,6 +2036,11 @@ err_engine1: list_del(&cryp->list); spin_unlock(&cryp_list.lock); + pm_runtime_disable(dev); + pm_runtime_put_noidle(dev); + pm_runtime_disable(dev); + pm_runtime_put_noidle(dev); + clk_disable_unprepare(cryp->clk); return ret; @@ -2028,10 +2049,15 @@ err_engine1: static int stm32_cryp_remove(struct platform_device *pdev) { struct stm32_cryp *cryp = platform_get_drvdata(pdev); + int ret; if (!cryp) return -ENODEV; + ret = pm_runtime_get_sync(cryp->dev); + if (ret < 0) + return ret; + crypto_unregister_aeads(aead_algs, ARRAY_SIZE(aead_algs)); crypto_unregister_algs(crypto_algs, ARRAY_SIZE(crypto_algs)); @@ -2041,16 +2067,52 @@ static int stm32_cryp_remove(struct platform_device *pdev) list_del(&cryp->list); spin_unlock(&cryp_list.lock); + pm_runtime_disable(cryp->dev); + pm_runtime_put_noidle(cryp->dev); + + clk_disable_unprepare(cryp->clk); + + return 0; +} + +#ifdef CONFIG_PM +static int stm32_cryp_runtime_suspend(struct device *dev) +{ + struct stm32_cryp *cryp = dev_get_drvdata(dev); + clk_disable_unprepare(cryp->clk); return 0; } +static int stm32_cryp_runtime_resume(struct device *dev) +{ + struct stm32_cryp *cryp = dev_get_drvdata(dev); + int ret; + + ret = clk_prepare_enable(cryp->clk); + if (ret) { + dev_err(cryp->dev, "Failed to prepare_enable clock\n"); + return ret; + } + + return 0; +} +#endif + +static const struct dev_pm_ops stm32_cryp_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, + pm_runtime_force_resume) + SET_RUNTIME_PM_OPS(stm32_cryp_runtime_suspend, + stm32_cryp_runtime_resume, NULL) +}; + static struct platform_driver stm32_cryp_driver = { .probe = stm32_cryp_probe, .remove = stm32_cryp_remove, .driver = { .name = DRIVER_NAME, + .pm = &stm32_cryp_pm_ops, .of_match_table = stm32_dt_ids, }, }; |