Dmitry, This patch-set has been on the list for some time (2 months) now.
How would you like me to proceed? > This driver adds the restart functionality for STiH415 and STiH416 > platforms from STMicroelectronics. This driver registers an > arm_pm_restart function to reset the platform. > > Signed-off-by: Christophe Kerello <[email protected]> > Signed-off-by: Lee Jones <[email protected]> > --- > drivers/power/reset/Kconfig | 6 ++ > drivers/power/reset/Makefile | 1 + > drivers/power/reset/st-poweroff.c | 151 > ++++++++++++++++++++++++++++++++++++++ > 3 files changed, 158 insertions(+) > create mode 100644 drivers/power/reset/st-poweroff.c > > diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig > index 003e4d4..445b330 100644 > --- a/drivers/power/reset/Kconfig > +++ b/drivers/power/reset/Kconfig > @@ -58,6 +58,12 @@ config POWER_RESET_SUN6I > help > Reboot support for the Allwinner A31 SoCs. > > +config POWER_RESET_ST > + bool "ST restart power-off driver" > + depends on POWER_RESET && ARCH_STI > + help > + Power off and reset support for STMicroelectronics boards. > + > config POWER_RESET_VEXPRESS > bool "ARM Versatile Express power-off and reset driver" > depends on ARM || ARM64 > diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile > index dde2e8b..aaae990 100644 > --- a/drivers/power/reset/Makefile > +++ b/drivers/power/reset/Makefile > @@ -5,6 +5,7 @@ obj-$(CONFIG_POWER_RESET_MSM) += msm-poweroff.o > obj-$(CONFIG_POWER_RESET_QNAP) += qnap-poweroff.o > obj-$(CONFIG_POWER_RESET_RESTART) += restart-poweroff.o > obj-$(CONFIG_POWER_RESET_SUN6I) += sun6i-reboot.o > +obj-$(CONFIG_POWER_RESET_ST) += st-poweroff.o > obj-$(CONFIG_POWER_RESET_VEXPRESS) += vexpress-poweroff.o > obj-$(CONFIG_POWER_RESET_XGENE) += xgene-reboot.o > obj-$(CONFIG_POWER_RESET_KEYSTONE) += keystone-reset.o > diff --git a/drivers/power/reset/st-poweroff.c > b/drivers/power/reset/st-poweroff.c > new file mode 100644 > index 0000000..a0acf25 > --- /dev/null > +++ b/drivers/power/reset/st-poweroff.c > @@ -0,0 +1,151 @@ > +/* > + * Copyright (C) 2014 STMicroelectronics > + * > + * Power off Restart driver, used in STMicroelectronics devices. > + * > + * Author: Christophe Kerello <[email protected]> > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License version 2, as > + * published by the Free Software Foundation. > + */ > + > +#include <linux/module.h> > +#include <linux/of.h> > +#include <linux/of_platform.h> > +#include <linux/platform_device.h> > +#include <linux/mfd/syscon.h> > +#include <linux/regmap.h> > + > +#include <asm/system_misc.h> > + > +struct reset_syscfg { > + struct regmap *regmap; > + /* syscfg used for reset */ > + unsigned int offset_rst; > + unsigned int mask_rst; > + /* syscfg used for unmask the reset */ > + unsigned int offset_rst_msk; > + unsigned int mask_rst_msk; > +}; > + > +/* STiH415 */ > +#define STIH415_SYSCFG_11 0x2c > +#define STIH415_SYSCFG_15 0x3c > + > +static struct reset_syscfg stih415_reset = { > + .offset_rst = STIH415_SYSCFG_11, > + .mask_rst = BIT(0), > + .offset_rst_msk = STIH415_SYSCFG_15, > + .mask_rst_msk = BIT(0) > +}; > + > +/* STiH416 */ > +#define STIH416_SYSCFG_500 0x7d0 > +#define STIH416_SYSCFG_504 0x7e0 > + > +static struct reset_syscfg stih416_reset = { > + .offset_rst = STIH416_SYSCFG_500, > + .mask_rst = BIT(0), > + .offset_rst_msk = STIH416_SYSCFG_504, > + .mask_rst_msk = BIT(0) > +}; > + > +/* STiH407 */ > +#define STIH407_SYSCFG_4000 0x0 > +#define STIH407_SYSCFG_4008 0x20 > + > +static struct reset_syscfg stih407_reset = { > + .offset_rst = STIH407_SYSCFG_4000, > + .mask_rst = BIT(0), > + .offset_rst_msk = STIH407_SYSCFG_4008, > + .mask_rst_msk = BIT(0) > +}; > + > +/* STiD127 */ > +#define STID127_SYSCFG_700 0x0 > +#define STID127_SYSCFG_773 0x124 > + > +static struct reset_syscfg stid127_reset = { > + .offset_rst = STID127_SYSCFG_773, > + .mask_rst = BIT(0), > + .offset_rst_msk = STID127_SYSCFG_700, > + .mask_rst_msk = BIT(8) > +}; > + > +static struct reset_syscfg *st_restart_syscfg; > + > +static void st_restart(enum reboot_mode reboot_mode, const char *cmd) > +{ > + /* reset syscfg updated */ > + regmap_update_bits(st_restart_syscfg->regmap, > + st_restart_syscfg->offset_rst, > + st_restart_syscfg->mask_rst, > + 0); > + > + /* unmask the reset */ > + regmap_update_bits(st_restart_syscfg->regmap, > + st_restart_syscfg->offset_rst_msk, > + st_restart_syscfg->mask_rst_msk, > + 0); > +} > + > +static struct of_device_id st_reset_of_match[] = { > + { > + .compatible = "st,stih415-restart", > + .data = (void *)&stih415_reset, > + }, { > + .compatible = "st,stih416-restart", > + .data = (void *)&stih416_reset, > + }, { > + .compatible = "st,stih407-restart", > + .data = (void *)&stih407_reset, > + }, { > + .compatible = "st,stid127-restart", > + .data = (void *)&stid127_reset, > + }, > + {} > +}; > + > +static int st_reset_probe(struct platform_device *pdev) > +{ > + struct device_node *np = pdev->dev.of_node; > + const struct of_device_id *match; > + struct device *dev = &pdev->dev; > + > + match = of_match_device(st_reset_of_match, dev); > + if (!match) > + return -ENODEV; > + > + st_restart_syscfg = (struct reset_syscfg *)match->data; > + > + st_restart_syscfg->regmap = > + syscon_regmap_lookup_by_phandle(np, "st,syscfg"); > + if (IS_ERR(st_restart_syscfg->regmap)) { > + dev_err(dev, "No syscfg phandle specified\n"); > + return PTR_ERR(st_restart_syscfg->regmap); > + } > + > + arm_pm_restart = st_restart; > + > + return 0; > +} > + > +static struct platform_driver st_reset_driver = { > + .probe = st_reset_probe, > + .driver = { > + .name = "st_reset", > + .of_match_table = st_reset_of_match, > + }, > +}; > + > +static int __init st_reset_init(void) > +{ > + return platform_driver_register(&st_reset_driver); > +} > + > +device_initcall(st_reset_init); > + > +MODULE_AUTHOR("Christophe Kerello <[email protected]>"); > +MODULE_DESCRIPTION("STMicroelectronics Power off Restart driver"); > +MODULE_LICENSE("GPL v2"); -- Lee Jones Linaro STMicroelectronics Landing Team Lead Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
