target/linux/layerscape/patches-5.4/808-i2c-0003-MLK-11403-I2C-imx-restore-pin-setting-for-i2c.patch

   1 From b862ceba838786ac81aa6a295ad91a54aff6909d Mon Sep 17 00:00:00 2001
   2 From: Gao Pan <b54642@freescale.com>
   3 Date: Tue, 25 Aug 2015 14:00:32 +0800
   4 Subject: [PATCH] MLK-11403: I2C: imx: restore pin setting for i2c
   5
   6 restore pin setting for i2c in suspend/resume
   7
   8 Signed-off-by: Gao Pan <gaopan@freescale.com>
   9 (Vipul: Fixed merge conflicts)
  10 Signed-off-by: Vipul Kumar <vipul_kumar@mentor.com>
  11 (cherry picked from commit 42b5aa1d72c09015d435459c6a59022255e3ef21)
  12 ---
  13  drivers/i2c/busses/i2c-imx.c | 19 +++++++++++++++++--
  14  1 file changed, 17 insertions(+), 2 deletions(-)
  15
  16 --- a/drivers/i2c/busses/i2c-imx.c
  17 +++ b/drivers/i2c/busses/i2c-imx.c
  18 @@ -1257,7 +1257,8 @@ static int __maybe_unused i2c_imx_runtim
  19  {
  20         struct imx_i2c_struct *i2c_imx = dev_get_drvdata(dev);
  21
  22 -       clk_disable(i2c_imx->clk);
  23 +       clk_disable_unprepare(i2c_imx->clk);
  24 +       pinctrl_pm_select_sleep_state(dev);
  25
  26         return 0;
  27  }
  28 @@ -1267,14 +1268,28 @@ static int __maybe_unused i2c_imx_runtim
  29         struct imx_i2c_struct *i2c_imx = dev_get_drvdata(dev);
  30         int ret;
  31
  32 -       ret = clk_enable(i2c_imx->clk);
  33 +       pinctrl_pm_select_default_state(dev);
  34 +       ret = clk_prepare_enable(i2c_imx->clk);
  35         if (ret)
  36                 dev_err(dev, "can't enable I2C clock, ret=%d\n", ret);
  37
  38         return ret;
  39  }
  40
  41 +static int i2c_imx_suspend(struct device *dev)
  42 +{
  43 +       pinctrl_pm_select_sleep_state(dev);
  44 +       return 0;
  45 +}
  46 +
  47 +static int i2c_imx_resume(struct device *dev)
  48 +{
  49 +       pinctrl_pm_select_default_state(dev);
  50 +       return 0;
  51 +}
  52 +
  53  static const struct dev_pm_ops i2c_imx_pm_ops = {
  54 +       SET_SYSTEM_SLEEP_PM_OPS(i2c_imx_suspend, i2c_imx_resume)
  55         SET_RUNTIME_PM_OPS(i2c_imx_runtime_suspend,
  56                            i2c_imx_runtime_resume, NULL)
  57  };