Tinker Dev Reboot patch

Combination of linked patches with small adjustment to work on 4.12.  Most likely needs implemented on 4.4 as well.

15a531028f
c6ad239fbd
5883709c4d

patch/kernel/rockchip-dev/9300_Tinker_Reboot_Hacks.patch

@@ -0,0 +1,121 @@
+diff --git a/drivers/mmc/host/dw_mmc-rockchip.c b/drivers/mmc/host/dw_mmc-rockchip.c
+index 372fb6e..b92a6d2 100644
+--- a/drivers/mmc/host/dw_mmc-rockchip.c
++++ b/drivers/mmc/host/dw_mmc-rockchip.c
+@@ -14,10 +14,12 @@
+ #include <linux/of_address.h>
+ #include <linux/mmc/slot-gpio.h>
+ #include <linux/pm_runtime.h>
++#include <linux/regulator/consumer.h>
+ #include <linux/slab.h>
+ 
+ #include "dw_mmc.h"
+ #include "dw_mmc-pltfm.h"
++#include "../core/core.h"
+ 
+ #define RK3288_CLKGEN_DIV       2
+ 
+@@ -353,6 +355,23 @@ static int dw_mci_rockchip_probe(struct platform_device *pdev)
+ 	return 0;
+ }
+ 
++static void dw_mci_rockchip_platfm_shutdown(struct platform_device *pdev)
++{
++	struct dw_mci *host = platform_get_drvdata(pdev);
++	struct mmc_host *mmc = host->cur_slot->mmc;
++	int ret;
++
++	mmc_power_off(mmc);
++
++	mdelay(20);
++
++	if (!IS_ERR(mmc->supply.vmmc))
++		ret = regulator_enable(mmc->supply.vmmc);
++
++	if (!IS_ERR(mmc->supply.vqmmc))
++		regulator_set_voltage(mmc->supply.vqmmc, 3000000, 3300000);
++}
++
+ static int dw_mci_rockchip_remove(struct platform_device *pdev)
+ {
+ 	pm_runtime_get_sync(&pdev->dev);
+@@ -373,6 +392,7 @@ static const struct dev_pm_ops dw_mci_rockchip_dev_pm_ops = {
+ static struct platform_driver dw_mci_rockchip_pltfm_driver = {
+ 	.probe		= dw_mci_rockchip_probe,
+ 	.remove		= dw_mci_rockchip_remove,
++	.shutdown	= dw_mci_rockchip_platfm_shutdown,
+ 	.driver		= {
+ 		.name		= "dwmmc_rockchip",
+ 		.of_match_table	= dw_mci_rockchip_match,
+diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
+index e45129f..1c133f0 100644
+--- a/drivers/mmc/host/dw_mmc.c
++++ b/drivers/mmc/host/dw_mmc.c
+@@ -39,8 +39,10 @@
+ #include <linux/of.h>
+ #include <linux/of_gpio.h>
+ #include <linux/mmc/slot-gpio.h>
++#include <linux/reboot.h>
+ 
+ #include "dw_mmc.h"
++#include "../core/core.h"
+ 
+ /* Common flag combinations */
+ #define DW_MCI_DATA_ERROR_FLAGS	(SDMMC_INT_DRTO | SDMMC_INT_DCRC | \
+@@ -2686,6 +2688,23 @@ static irqreturn_t dw_mci_interrupt(int irq, void *dev_id)
+ 
+ 	return IRQ_HANDLED;
+ }
++struct dw_mci *mSdhost;
++void setmmcEmergency() {
++	struct mmc_host *mmc = mSdhost->cur_slot->mmc;
++	int ret;
++
++	mmc_power_off(mmc);
++	mdelay(20);
++
++	if (!IS_ERR(mmc->supply.vmmc))  {
++		ret = regulator_enable(mmc->supply.vmmc);
++	}
++
++	if (!IS_ERR(mmc->supply.vqmmc))
++		regulator_set_voltage(mmc->supply.vqmmc, 3000000, 3300000);
++
++}
++EXPORT_SYMBOL(setmmcEmergency);
+ 
+ static int dw_mci_init_slot(struct dw_mci *host, unsigned int id)
+ {
+@@ -2717,6 +2736,8 @@ static int dw_mci_init_slot(struct dw_mci *host, unsigned int id)
+ 		mmc->f_min = freq[0];
+ 		mmc->f_max = freq[1];
+ 	}
++	if (of_find_property(host->dev->of_node, "supports-sd", NULL))
++			mSdhost = host;
+ 
+ 	/*if there are external regulators, get them*/
+ 	ret = mmc_regulator_get_supply(mmc);
+diff --git a/include/linux/reboot.h b/include/linux/reboot.h
+index a7ff409..e045bc2 100644
+--- a/include/linux/reboot.h
++++ b/include/linux/reboot.h
+@@ -73,6 +73,7 @@ extern char poweroff_cmd[POWEROFF_CMD_PATH_LEN];
+ extern void orderly_poweroff(bool force);
+ extern void orderly_reboot(void);
+ 
++extern void setmmcEmergency(void);
+ /*
+  * Emergency restart, callable from an interrupt handler.
+  */
+diff --git a/kernel/reboot.c b/kernel/reboot.c
+index bd30a97..9f99488 100644
+--- a/kernel/reboot.c
++++ b/kernel/reboot.c
+@@ -61,6 +61,7 @@ void (*pm_power_off_prepare)(void);
+ void emergency_restart(void)
+ {
+ 	kmsg_dump(KMSG_DUMP_EMERG);
++	setmmcEmergency();
+ 	machine_emergency_restart();
+ }
+ EXPORT_SYMBOL_GPL(emergency_restart);