ARM: OMAP2+: gpmc: Low power transition support (b536dd41) · Commits · 戴 / test

GPMC is hardware controller for external memory interfaces. This patch adds suspend/resume support for GPMC driver. It also preserves GPMC register configurations across device low-power states in which GPMC hardware can be powered-off. gpmc_suspend()/gpmc_resume() are called by default by core PM framework as part of driver's runtime PM callbacks. Signed-off-by:

Philip Avinash <avinashphilip@ti.com> Signed-off-by:

Pekon Gupta <pekon@ti.com> Signed-off-by:

Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/gpmc.c

+19 −2

Original line number	Diff line number	Diff line
		@@ -1669,6 +1669,24 @@ static int gpmc_remove(struct platform_device *pdev)
		return 0;
		}

		#ifdef CONFIG_PM_SLEEP
		static int gpmc_suspend(struct device *dev)
		{
		omap3_gpmc_save_context();
		pm_runtime_put_sync(dev);
		return 0;
		}

		static int gpmc_resume(struct device *dev)
		{
		pm_runtime_get_sync(dev);
		omap3_gpmc_restore_context();
		return 0;
		}
		#endif

		static SIMPLE_DEV_PM_OPS(gpmc_pm_ops, gpmc_suspend, gpmc_resume);

		static struct platform_driver gpmc_driver = {
		.probe = gpmc_probe,
		.remove = gpmc_remove,
		@@ -1676,6 +1694,7 @@ static struct platform_driver gpmc_driver = {
		.name = DEVICE_NAME,
		.owner = THIS_MODULE,
		.of_match_table = of_match_ptr(gpmc_dt_ids),
		.pm = &gpmc_pm_ops,
		},
		};

		@@ -1738,7 +1757,6 @@ static irqreturn_t gpmc_handle_irq(int irq, void *dev)
		return IRQ_HANDLED;
		}

		#ifdef CONFIG_ARCH_OMAP3
		static struct omap3_gpmc_regs gpmc_context;

		void omap3_gpmc_save_context(void)
		@@ -1803,4 +1821,3 @@ void omap3_gpmc_restore_context(void)
		}
		}
		}
		#endif /* CONFIG_ARCH_OMAP3 */

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