diff options
| author | Bhavesh Parekh <bparekh@nvidia.com> | 2012-10-04 15:32:36 +0530 |
|---|---|---|
| committer | Dan Willemsen <dwillemsen@nvidia.com> | 2013-09-14 01:32:12 -0700 |
| commit | 12985576688758d593bf1ced74b32ee31f803d55 (patch) | |
| tree | 42d6e13e873876e66304518e9d93621240abf7af /drivers/mtd | |
| parent | 23c7e8a85d66ba28fc195eef21dcffb162a662b1 (diff) | |
driver: nor: tegra: Adding suspend and resume routine
Adding suspend and resume function for TegraNOR to restore the config
registers and timing register
bug 1010500
bug 1053727
Change-Id: I2531c0deaf17c02437b8fab9e15f9a90a9584110
Signed-off-by: Bhavesh Parekh <bparekh@nvidia.com>
Reviewed-on: http://git-master/r/141525
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Sumeet Gupta <sumeetg@nvidia.com>
(cherry picked from commit 4c6b09264410173c66314d42d3379d53012a1882)
Reviewed-on: http://git-master/r/161870
Tested-by: Nitin Agrawal <nitina@nvidia.com>
Reviewed-by: Bitan Biswas <bbiswas@nvidia.com>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/maps/tegra_nor.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/mtd/maps/tegra_nor.c b/drivers/mtd/maps/tegra_nor.c index 989fb2b334b8..d275b3c48070 100644 --- a/drivers/mtd/maps/tegra_nor.c +++ b/drivers/mtd/maps/tegra_nor.c @@ -124,6 +124,7 @@ struct tegra_nor_info { u32 init_config; u32 timing0_default, timing1_default; u32 timing0_read, timing1_read; + u32 suspend_config; }; static inline unsigned long snor_tegra_readl(struct tegra_nor_info *tnor, @@ -514,9 +515,32 @@ static int tegra_nor_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM +static int tegra_nor_suspend(struct platform_device *pdev, pm_message_t state) +{ + struct tegra_nor_info *info = platform_get_drvdata(pdev); + info->suspend_config = snor_tegra_readl(info, TEGRA_SNOR_CONFIG_REG); + return 0; +} + +static int tegra_nor_resume(struct platform_device *pdev) +{ + struct tegra_nor_info *info = platform_get_drvdata(pdev); + + snor_tegra_writel(info, info->suspend_config, TEGRA_SNOR_CONFIG_REG); + snor_tegra_writel(info, info->timing1_default, TEGRA_SNOR_TIMING1_REG); + snor_tegra_writel(info, info->timing0_default, TEGRA_SNOR_TIMING0_REG); + return 0; +} +#endif + static struct platform_driver __refdata tegra_nor_driver = { .probe = tegra_nor_probe, .remove = tegra_nor_remove, +#ifdef CONFIG_PM + .suspend = tegra_nor_suspend, + .resume = tegra_nor_resume, +#endif .driver = { .name = DRV_NAME, .owner = THIS_MODULE, |