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| author | Topi Kuutela <topi.kuutela@gmail.com> | 2019-12-09 16:10:50 +0530 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2020-01-30 09:16:08 +0100 |
| commit | db3fad841d9bf5c8b002ce86fd82aec32af80fc0 (patch) | |
| tree | 442d7b61041a0bd32973cf73646c3172f1768578 /drivers/i2c | |
| parent | 69dc44bcbc11fab397b614b1204ce10f3d74219c (diff) | |
| download | linux-db3fad841d9bf5c8b002ce86fd82aec32af80fc0.tar.bz2 | |
i2c: cadence: Fix power management order of operations
E.g. pm_runtime_set_active must be called while the power
management system is disabled. Fixes extra hanging clk_enable.
Signed-off-by: Topi Kuutela <topi.kuutela@gmail.com>
Acked-by: Sören Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/i2c-cadence.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/i2c/busses/i2c-cadence.c b/drivers/i2c/busses/i2c-cadence.c index bae64c6d3e48..276cfa8bd997 100644 --- a/drivers/i2c/busses/i2c-cadence.c +++ b/drivers/i2c/busses/i2c-cadence.c @@ -937,10 +937,10 @@ static int cdns_i2c_probe(struct platform_device *pdev) if (ret) dev_err(&pdev->dev, "Unable to enable clock.\n"); - pm_runtime_enable(id->dev); pm_runtime_set_autosuspend_delay(id->dev, CNDS_I2C_PM_TIMEOUT); pm_runtime_use_autosuspend(id->dev); pm_runtime_set_active(id->dev); + pm_runtime_enable(id->dev); id->clk_rate_change_nb.notifier_call = cdns_i2c_clk_notifier_cb; if (clk_notifier_register(id->clk, &id->clk_rate_change_nb)) @@ -989,8 +989,8 @@ static int cdns_i2c_probe(struct platform_device *pdev) err_clk_dis: clk_disable_unprepare(id->clk); - pm_runtime_set_suspended(&pdev->dev); pm_runtime_disable(&pdev->dev); + pm_runtime_set_suspended(&pdev->dev); return ret; } @@ -1006,10 +1006,13 @@ static int cdns_i2c_remove(struct platform_device *pdev) { struct cdns_i2c *id = platform_get_drvdata(pdev); + pm_runtime_disable(&pdev->dev); + pm_runtime_set_suspended(&pdev->dev); + pm_runtime_dont_use_autosuspend(&pdev->dev); + i2c_del_adapter(&id->adap); clk_notifier_unregister(id->clk, &id->clk_rate_change_nb); clk_disable_unprepare(id->clk); - pm_runtime_disable(&pdev->dev); return 0; } |