[v1] Bluetooth: btnxpuart: Add system suspend and resume handlers

This adds handling for system suspend and resume. While the host enters
suspend state, the driver will drive the chip into low power state.

Similarly when system is resuming, the driver will wake up the chip.

Signed-off-by: Neeraj Sanjay Kale <neeraj.sanjaykale@nxp.com>
---
 drivers/bluetooth/btnxpuart.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

This is automated email and please do not reply to this email!

Dear submitter,

Thank you for submitting the patches to the linux bluetooth mailing list.
This is a CI test results with your patch series:
PW Link:https://patchwork.kernel.org/project/bluetooth/list/?series=868445

---Test result---

Test Summary:
CheckPatch                    PASS      0.68 seconds
GitLint                       PASS      0.31 seconds
SubjectPrefix                 PASS      0.12 seconds
BuildKernel                   PASS      29.89 seconds
CheckAllWarning               PASS      32.70 seconds
CheckSparse                   PASS      38.23 seconds
CheckSmatch                   PASS      104.39 seconds
BuildKernel32                 PASS      29.64 seconds
TestRunnerSetup               PASS      531.46 seconds
TestRunner_l2cap-tester       PASS      20.26 seconds
TestRunner_iso-tester         FAIL      41.33 seconds
TestRunner_bnep-tester        PASS      6.30 seconds
TestRunner_mgmt-tester        PASS      114.14 seconds
TestRunner_rfcomm-tester      PASS      7.46 seconds
TestRunner_sco-tester         PASS      15.07 seconds
TestRunner_ioctl-tester       PASS      7.86 seconds
TestRunner_mesh-tester        PASS      6.03 seconds
TestRunner_smp-tester         PASS      7.01 seconds
TestRunner_userchan-tester    PASS      5.11 seconds
IncrementalBuild              PASS      28.17 seconds

Details
##############################
Test: TestRunner_iso-tester - FAIL
Desc: Run iso-tester with test-runner
Output:
Total: 122, Passed: 117 (95.9%), Failed: 1, Not Run: 4

Failed Test Cases
ISO Connect2 Suspend - Success                       Failed       4.240 seconds


---
Regards,
Linux Bluetooth

Hi Neeraj

> -----Original Message-----
> From: Neeraj Sanjay Kale <neeraj.sanjaykale@nxp.com>
> Sent: Thursday, July 4, 2024 8:58 PM
> To: marcel@holtmann.org; luiz.dentz@gmail.com
> Cc: linux-bluetooth@vger.kernel.org; linux-kernel@vger.kernel.org;
> Amitkumar Karwar <amitkumar.karwar@nxp.com>; Rohit Fule
> <rohit.fule@nxp.com>; Neeraj Sanjay Kale <neeraj.sanjaykale@nxp.com>;
> Sherry Sun <sherry.sun@nxp.com>; Luke Wang <ziniu.wang_1@nxp.com>;
> Bough Chen <haibo.chen@nxp.com>; LnxRevLi <LnxRevLi@nxp.com>
> Subject: [PATCH v1] Bluetooth: btnxpuart: Add system suspend and resume
> handlers
> 
> This adds handling for system suspend and resume. While the host enters
> suspend state, the driver will drive the chip into low power state.
> 
> Similarly when system is resuming, the driver will wake up the chip.
> 
> Signed-off-by: Neeraj Sanjay Kale <neeraj.sanjaykale@nxp.com>
> ---
>  drivers/bluetooth/btnxpuart.c | 23 +++++++++++++++++++++++
>  1 file changed, 23 insertions(+)
> 
> diff --git a/drivers/bluetooth/btnxpuart.c b/drivers/bluetooth/btnxpuart.c
> index da18fd4f54f3..acd360fcc3b8 100644
> --- a/drivers/bluetooth/btnxpuart.c
> +++ b/drivers/bluetooth/btnxpuart.c
> @@ -1498,6 +1498,24 @@ static void nxp_serdev_remove(struct
> serdev_device *serdev)
>  	hci_free_dev(hdev);
>  }
> 
> +static int nxp_suspend(struct device *dev)
> +{
> +	struct btnxpuart_dev *nxpdev = dev_get_drvdata(dev);
> +	struct ps_data *psdata = &nxpdev->psdata;
> +
> +	ps_control(psdata->hdev, PS_STATE_SLEEP);
> +	return 0;
> +}
> +
> +static int nxp_resume(struct device *dev)
> +{
> +	struct btnxpuart_dev *nxpdev = dev_get_drvdata(dev);
> +	struct ps_data *psdata = &nxpdev->psdata;
> +
> +	ps_control(data->hdev, PS_STATE_AWAKE);
> +	return 0;
> +}
> +

Is it better to use btnxpuart_suspend/resume or nxp_serdev_suspend/resume? 

>  static struct btnxpuart_data w8987_data __maybe_unused = {
>  	.helper_fw_name = NULL,
>  	.fw_name = FIRMWARE_W8987,
> @@ -1517,12 +1535,17 @@ static const struct of_device_id
> nxpuart_of_match_table[] __maybe_unused = {
>  };
>  MODULE_DEVICE_TABLE(of, nxpuart_of_match_table);
> 
> +static const struct dev_pm_ops nxp_pm_ops = {
> +	SET_SYSTEM_SLEEP_PM_OPS(nxp_suspend, nxp_resume)
> +};
> +
>  static struct serdev_device_driver nxp_serdev_driver = {
>  	.probe = nxp_serdev_probe,
>  	.remove = nxp_serdev_remove,
>  	.driver = {
>  		.name = "btnxpuart",
>  		.of_match_table = of_match_ptr(nxpuart_of_match_table),
> +		.pm = &nxp_pm_ops,
>  	},
>  };
> 
> --
> 2.34.1