ARM: imx6: register pm_power_off handler if "fsl,pmic-stby-poweroff" is set (8148d213) · Commits · 戴 / test

One of the Freescale recommended sequences for power off with external PMIC is the following: ... 3. SoC is programming PMIC for power off when standby is asserted. 4. In CCM STOP mode, Standby is asserted, PMIC gates SoC supplies. See: http://www.nxp.com/assets/documents/data/en/reference-manuals/IMX6DQRM.pdf page 5083 This patch implements step 4. of this sequence. Signed-off-by:

Oleksij Rempel <o.rempel@pengutronix.de> Signed-off-by:

Shawn Guo <shawnguo@kernel.org>

arch/arm/mach-imx/pm-imx6.c

+25 −0

Original line number	Diff line number	Diff line
		@@ -618,6 +618,28 @@ static void __init imx6_pm_common_init(const struct imx6_pm_socdata
		IMX6Q_GPR1_GINT);
		}

		static void imx6_pm_stby_poweroff(void)
		{
		imx6_set_lpm(STOP_POWER_OFF);
		imx6q_suspend_finish(0);

		mdelay(1000);

		pr_emerg("Unable to poweroff system\n");
		}

		static int imx6_pm_stby_poweroff_probe(void)
		{
		if (pm_power_off) {
		pr_warn("%s: pm_power_off already claimed %p %pf!\n",
		__func__, pm_power_off, pm_power_off);
		return -EBUSY;
		}

		pm_power_off = imx6_pm_stby_poweroff;
		return 0;
		}

		void __init imx6_pm_ccm_init(const char *ccm_compat)
		{
		struct device_node *np;
		@@ -634,6 +656,9 @@ void __init imx6_pm_ccm_init(const char *ccm_compat)
		val = readl_relaxed(ccm_base + CLPCR);
		val &= ~BM_CLPCR_LPM;
		writel_relaxed(val, ccm_base + CLPCR);

		if (of_property_read_bool(np, "fsl,pmic-stby-poweroff"))
		imx6_pm_stby_poweroff_probe();
		}

		void __init imx6q_pm_init(void)

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