linux-kernel - [PATCH V1] firmware: tegra: early resume bpmp

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Message-ID: <1560515499-1015-1-git-send-email-bbiswas@nvidia.com>
Date:   Fri, 14 Jun 2019 05:31:39 -0700
From:   Bitan Biswas <bbiswas@...dia.com>
To:     Thierry Reding <treding@...dia.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Timo Alho <talho@...dia.com>,
        Sivaram Nair <sivaramn@...dia.com>,
        Allison Randal <allison@...utok.net>,
        Thomas Gleixner <tglx@...utronix.de>,
        <linux-tegra@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     Bitan Biswas <bbiswas@...dia.com>
Subject: [PATCH V1] firmware: tegra: early resume bpmp

Early resume Tegra bpmp to fix Xavier clock rate error as follows:
[  159.017101] of_serial 3110000.serial: calling platform_pm_resume+0x0/0x58 @ 317, parent: cbb
[  159.025501] of_serial 3110000.serial: platform_pm_resume+0x0/0x58 returned 0 after 14 usecs
[  159.033694] tegra-i2c 31c0000.i2c: calling platform_pm_resume+0x0/0x58 @ 317, parent: cbb
[  159.042254] tegra-i2c 31c0000.i2c: failed changing clock rate: -22
[  159.048216] PM: dpm_run_callback(): platform_pm_resume+0x0/0x58 returns -22
[  159.055553] tegra-i2c 31c0000.i2c: platform_pm_resume+0x0/0x58 returned -22 after 13072 usecs
[  159.063875] PM: Device 31c0000.i2c failed to resume: error -22

Signed-off-by: Bitan Biswas <bbiswas@...dia.com>
---
 drivers/firmware/tegra/bpmp.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/firmware/tegra/bpmp.c b/drivers/firmware/tegra/bpmp.c
index dd775e8..de09036 100644
--- a/drivers/firmware/tegra/bpmp.c
+++ b/drivers/firmware/tegra/bpmp.c
@@ -811,7 +811,9 @@ static int __maybe_unused tegra_bpmp_resume(struct device *dev)
 		return 0;
 }
 
-static SIMPLE_DEV_PM_OPS(tegra_bpmp_pm_ops, NULL, tegra_bpmp_resume);
+const struct dev_pm_ops tegra_bpmp_pm_ops = {
+	.resume_early = tegra_bpmp_resume
+};
 
 #if IS_ENABLED(CONFIG_ARCH_TEGRA_186_SOC) || \
     IS_ENABLED(CONFIG_ARCH_TEGRA_194_SOC)
-- 
2.7.4