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59 lines
2.0 KiB
Diff
59 lines
2.0 KiB
Diff
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From 4a76bb8458cbe93309314c58f276087569b2fc48 Mon Sep 17 00:00:00 2001
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From: Gao Pan <pandy.gao@nxp.com>
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Date: Fri, 18 Aug 2017 18:35:11 +0800
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Subject: [PATCH] MLK-16203 enable runtime pm of i2c temporary when do system
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suspend
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When we do system suspend, the runtime pm will be disabled, but we need
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to control the PMIC to power on/off the regulator, if the runtime pm is
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disabled, if will failed to request runtime wakeup. So data transfer will
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failed.
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Signed-off-by: Bai Ping <ping.bai@nxp.com>
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Signed-off-by: Gao Pan <pandy.gao@nxp.com>
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Signed-off-by: Vipul Kumar <vipul_kumar@mentor.com>
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(cherry picked from commit 93adab71408f1f162015e77715dd04ce2301d673)
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---
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drivers/i2c/busses/i2c-imx.c | 12 +++++++++++-
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1 file changed, 11 insertions(+), 1 deletion(-)
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--- a/drivers/i2c/busses/i2c-imx.c
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+++ b/drivers/i2c/busses/i2c-imx.c
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@@ -896,10 +896,17 @@ static int i2c_imx_xfer(struct i2c_adapt
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unsigned int i, temp;
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int result;
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bool is_lastmsg = false;
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+ bool enable_runtime_pm = false;
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struct imx_i2c_struct *i2c_imx = i2c_get_adapdata(adapter);
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dev_dbg(&i2c_imx->adapter.dev, "<%s>\n", __func__);
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+
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+ if (!pm_runtime_enabled(i2c_imx->adapter.dev.parent)) {
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+ pm_runtime_enable(i2c_imx->adapter.dev.parent);
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+ enable_runtime_pm = true;
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+ }
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+
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result = pm_runtime_get_sync(i2c_imx->adapter.dev.parent);
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if (result < 0)
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goto out;
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@@ -971,6 +978,9 @@ fail0:
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pm_runtime_put_autosuspend(i2c_imx->adapter.dev.parent);
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out:
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+ if (enable_runtime_pm)
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+ pm_runtime_disable(i2c_imx->adapter.dev.parent);
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+
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dev_dbg(&i2c_imx->adapter.dev, "<%s> exit with: %s: %d\n", __func__,
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(result < 0) ? "error" : "success msg",
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(result < 0) ? result : num);
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@@ -1259,7 +1269,7 @@ static int i2c_imx_resume(struct device
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}
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static const struct dev_pm_ops i2c_imx_pm_ops = {
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- SET_SYSTEM_SLEEP_PM_OPS(i2c_imx_suspend, i2c_imx_resume)
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+ SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(i2c_imx_suspend, i2c_imx_resume)
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SET_RUNTIME_PM_OPS(i2c_imx_runtime_suspend,
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i2c_imx_runtime_resume, NULL)
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};
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