From: Grazvydas Ignotas <notasas@gmail.com>
Date: Thu, 26 May 2016 00:31:09 +0000 (+0300)
Subject: OMAP3: PM: some OFF mode hacks
X-Git-Tag: sz_175~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d47245447c94832d2372b63ac2ad7001589368f1;p=pandora-kernel.git

OMAP3: PM: some OFF mode hacks

Set off mode by default where it works.
Allow to set off mode for everythng except core+per or just per.
---

diff --git a/arch/arm/mach-omap2/cpuidle34xx.c b/arch/arm/mach-omap2/cpuidle34xx.c
index bbb1a21b7f42..64592bba7f0e 100644
--- a/arch/arm/mach-omap2/cpuidle34xx.c
+++ b/arch/arm/mach-omap2/cpuidle34xx.c
@@ -177,6 +177,10 @@ static int next_valid_state(struct cpuidle_device *dev,
 		 */
 		if (!IS_PM34XX_ERRATUM(PM_SDRC_WAKEUP_ERRATUM_i583))
 			core_deepest_state = PWRDM_POWER_OFF;
+
+		/* pandora hack */
+		if (enable_off_mode < 2)
+			core_deepest_state = PWRDM_POWER_RET;
 	}
 
 	if (!omap_uart_can_sleep())
diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c
index 78993efc6510..572202591030 100644
--- a/arch/arm/mach-omap2/pm34xx.c
+++ b/arch/arm/mach-omap2/pm34xx.c
@@ -762,6 +762,9 @@ void omap3_pm_off_mode_enable(int enable)
 			pwrst->next_state = PWRDM_POWER_RET;
 			pr_warn("%s: Core OFF disabled due to errata i583\n",
 				__func__);
+		} else if (enable < 3 && pwrst->pwrdm == per_pwrdm) {
+			/* pandora hack */
+			pwrst->next_state = PWRDM_POWER_RET;
 		} else {
 			pwrst->next_state = state;
 		}
@@ -810,6 +813,29 @@ static int __init pwrdms_setup(struct powerdomain *pwrdm, void *unused)
 	if (pwrdm_has_hdwr_sar(pwrdm))
 		pwrdm_enable_hdwr_sar(pwrdm);
 
+	/* pandora OFF hacks, notes for missing:
+	 * - core_pwrdm - loses GPIO state?!
+	 * - per_pwrdm  - must keep RET because of GPIOs
+	 * - neon_pwrdm - depends on mpu_pwrdm
+	 * - mpu_pwrdm  - sometimes hangs?
+	 * notes for enabled:
+	 * - usbhost_pwrdm - does driver reload + reinit anyway, no runtime PM
+	 * - sgx_pwrdm  - only OFF is supported
+	 * - dss_pwrdm  - works, needs working context_loss counter
+	 * - cam_pwrdm  - not used
+	 * - iva2_pwrdm - c64_tools reprograms with direct reg hits anyway
+	 */
+	if (   pwrdm == pwrdm_lookup("usbhost_pwrdm")
+	    || pwrdm == pwrdm_lookup("sgx_pwrdm")
+	    || pwrdm == pwrdm_lookup("cam_pwrdm")
+	    || pwrdm == pwrdm_lookup("iva2_pwrdm")
+	    )
+		pwrst->next_state = PWRDM_POWER_OFF;
+
+	/* on OMAP3, at least on ES2.1, DSS drains more in OFF than in RET?? */
+	else if (cpu_is_omap3630() && pwrdm == pwrdm_lookup("dss_pwrdm"))
+		pwrst->next_state = PWRDM_POWER_OFF;
+
 	return omap_set_pwrdm_state(pwrst->pwrdm, pwrst->next_state);
 }