| Message ID | 79CD15C6BA57404B839C016229A409A83EB50073@DBDE01.ent.ti.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 29.10.2012 05:31, Hiremath, Vaibhav wrote: > On Sun, Oct 28, 2012 at 23:47:55, Daniel Mack wrote: >> This patch adds the ability to reboot am33xx-based systems. >> >> Signed-off-by: Daniel Mack <zonque@gmail.com> >> --- >> arch/arm/mach-omap2/board-generic.c | 1 + >> arch/arm/mach-omap2/prcm.c | 6 ++++++ >> 2 files changed, 7 insertions(+) >> >> diff --git a/arch/arm/mach-omap2/board-generic.c b/arch/arm/mach-omap2/board-generic.c >> index 601ecdf..6a69ceb 100644 >> --- a/arch/arm/mach-omap2/board-generic.c >> +++ b/arch/arm/mach-omap2/board-generic.c >> @@ -114,6 +114,7 @@ DT_MACHINE_START(AM33XX_DT, "Generic AM33XX (Flattened Device Tree)") >> .init_machine = omap_generic_init, >> .timer = &omap3_am33xx_timer, >> .dt_compat = am33xx_boards_compat, >> + .restart = omap_prcm_restart, >> MACHINE_END >> #endif >> >> diff --git a/arch/arm/mach-omap2/prcm.c b/arch/arm/mach-omap2/prcm.c >> index 0f51e03..8a3068a 100644 >> --- a/arch/arm/mach-omap2/prcm.c >> +++ b/arch/arm/mach-omap2/prcm.c >> @@ -32,6 +32,7 @@ >> #include "clock2xxx.h" >> #include "cm2xxx_3xxx.h" >> #include "prm2xxx_3xxx.h" >> +#include "prm33xx.h" >> #include "prm44xx.h" >> #include "prminst44xx.h" >> #include "cminst44xx.h" >> @@ -72,6 +73,11 @@ void omap_prcm_restart(char mode, const char *cmd) >> omap3_ctrl_write_boot_mode((cmd ? (u8)*cmd : 0)); >> } else if (cpu_is_omap44xx()) { >> omap4_prminst_global_warm_sw_reset(); /* never returns */ >> + } else if (soc_is_am33xx()) { >> + prcm_offs = AM33XX_PRM_DEVICE_MOD; >> + omap2_prm_set_mod_reg_bits(OMAP4430_RST_GLOBAL_COLD_SW_MASK, >> + prcm_offs, >> + AM33XX_PRM_RSTCTRL_OFFSET); > > This is not clean way of handling it, we should have something similar to > omap4. Also we should use warm-reset here instead of cold. > > I have quickly created patch, can you please review and test is? > I have tested it on AM335x EVM and Bone platform. Works for me as well, thanks! You can take my Tested-by: Daniel Mack <zonque@gmail.com> if you wish ... > > > diff --git a/arch/arm/mach-omap2/board-generic.c b/arch/arm/mach-omap2/board-generic.c > index 601ecdf..6a69ceb 100644 > --- a/arch/arm/mach-omap2/board-generic.c > +++ b/arch/arm/mach-omap2/board-generic.c > @@ -114,6 +114,7 @@ DT_MACHINE_START(AM33XX_DT, "Generic AM33XX (Flattened Device Tree)") > .init_machine = omap_generic_init, > .timer = &omap3_am33xx_timer, > .dt_compat = am33xx_boards_compat, > + .restart = omap_prcm_restart, > MACHINE_END > #endif > > diff --git a/arch/arm/mach-omap2/prcm.c b/arch/arm/mach-omap2/prcm.c > index 0f51e03..490f8f6 100644 > --- a/arch/arm/mach-omap2/prcm.c > +++ b/arch/arm/mach-omap2/prcm.c > @@ -33,6 +33,7 @@ > #include "cm2xxx_3xxx.h" > #include "prm2xxx_3xxx.h" > #include "prm44xx.h" > +#include "prm33xx.h" > #include "prminst44xx.h" > #include "cminst44xx.h" > #include "prm-regbits-24xx.h" > @@ -72,6 +73,8 @@ void omap_prcm_restart(char mode, const char *cmd) > omap3_ctrl_write_boot_mode((cmd ? (u8)*cmd : 0)); > } else if (cpu_is_omap44xx()) { > omap4_prminst_global_warm_sw_reset(); /* never returns */ > + } else if (soc_is_am33xx()) { > + am33xx_prm_global_warm_sw_reset(); /* never returns */ > } else { > WARN_ON(1); > } > diff --git a/arch/arm/mach-omap2/prm33xx.c b/arch/arm/mach-omap2/prm33xx.c > index e7dbb6c..505219d 100644 > --- a/arch/arm/mach-omap2/prm33xx.c > +++ b/arch/arm/mach-omap2/prm33xx.c > @@ -133,3 +133,18 @@ int am33xx_prm_deassert_hardreset(u8 shift, s16 inst, > > return (c == MAX_MODULE_HARDRESET_WAIT) ? -EBUSY : 0; > } > + > +void am33xx_prm_global_warm_sw_reset(void) > +{ > + u32 v; > + > + v = am33xx_prm_read_reg(AM33XX_PRM_DEVICE_MOD, > + AM33XX_PRM_RSTCTRL_OFFSET); > + v |= AM33XX_GLOBAL_WARM_SW_RST_MASK; > + am33xx_prm_write_reg(v, AM33XX_PRM_DEVICE_MOD, > + AM33XX_PRM_RSTCTRL_OFFSET); > + > + /* OCP barrier */ > + v = am33xx_prm_read_reg(AM33XX_PRM_DEVICE_MOD, > + AM33XX_PRM_RSTCTRL_OFFSET); > +} > diff --git a/arch/arm/mach-omap2/prm33xx.h b/arch/arm/mach-omap2/prm33xx.h > index 3f25c56..cdfc694 100644 > --- a/arch/arm/mach-omap2/prm33xx.h > +++ b/arch/arm/mach-omap2/prm33xx.h > @@ -126,4 +126,5 @@ extern int am33xx_prm_is_hardreset_asserted(u8 shift, s16 inst, > extern int am33xx_prm_assert_hardreset(u8 shift, s16 inst, u16 rstctrl_offs); > extern int am33xx_prm_deassert_hardreset(u8 shift, s16 inst, > u16 rstctrl_offs, u16 rstst_offs); > +extern void am33xx_prm_global_warm_sw_reset(void); > > > Thanks, > Vaibhav > -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Mon, Oct 29, 2012 at 15:19:21, Daniel Mack wrote: > On 29.10.2012 05:31, Hiremath, Vaibhav wrote: > > On Sun, Oct 28, 2012 at 23:47:55, Daniel Mack wrote: > >> This patch adds the ability to reboot am33xx-based systems. > >> > >> Signed-off-by: Daniel Mack <zonque@gmail.com> > >> --- > >> arch/arm/mach-omap2/board-generic.c | 1 + > >> arch/arm/mach-omap2/prcm.c | 6 ++++++ > >> 2 files changed, 7 insertions(+) > >> > >> diff --git a/arch/arm/mach-omap2/board-generic.c b/arch/arm/mach-omap2/board-generic.c > >> index 601ecdf..6a69ceb 100644 > >> --- a/arch/arm/mach-omap2/board-generic.c > >> +++ b/arch/arm/mach-omap2/board-generic.c > >> @@ -114,6 +114,7 @@ DT_MACHINE_START(AM33XX_DT, "Generic AM33XX (Flattened Device Tree)") > >> .init_machine = omap_generic_init, > >> .timer = &omap3_am33xx_timer, > >> .dt_compat = am33xx_boards_compat, > >> + .restart = omap_prcm_restart, > >> MACHINE_END > >> #endif > >> > >> diff --git a/arch/arm/mach-omap2/prcm.c b/arch/arm/mach-omap2/prcm.c > >> index 0f51e03..8a3068a 100644 > >> --- a/arch/arm/mach-omap2/prcm.c > >> +++ b/arch/arm/mach-omap2/prcm.c > >> @@ -32,6 +32,7 @@ > >> #include "clock2xxx.h" > >> #include "cm2xxx_3xxx.h" > >> #include "prm2xxx_3xxx.h" > >> +#include "prm33xx.h" > >> #include "prm44xx.h" > >> #include "prminst44xx.h" > >> #include "cminst44xx.h" > >> @@ -72,6 +73,11 @@ void omap_prcm_restart(char mode, const char *cmd) > >> omap3_ctrl_write_boot_mode((cmd ? (u8)*cmd : 0)); > >> } else if (cpu_is_omap44xx()) { > >> omap4_prminst_global_warm_sw_reset(); /* never returns */ > >> + } else if (soc_is_am33xx()) { > >> + prcm_offs = AM33XX_PRM_DEVICE_MOD; > >> + omap2_prm_set_mod_reg_bits(OMAP4430_RST_GLOBAL_COLD_SW_MASK, > >> + prcm_offs, > >> + AM33XX_PRM_RSTCTRL_OFFSET); > > > > This is not clean way of handling it, we should have something similar to > > omap4. Also we should use warm-reset here instead of cold. > > > > I have quickly created patch, can you please review and test is? > > I have tested it on AM335x EVM and Bone platform. > > Works for me as well, thanks! > > You can take my > > Tested-by: Daniel Mack <zonque@gmail.com> > Thanks Daniel for confirming. I will send out this patch ASAP with your tested by. Thanks, Vaibhav -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/arch/arm/mach-omap2/board-generic.c b/arch/arm/mach-omap2/board-generic.c index 601ecdf..6a69ceb 100644 --- a/arch/arm/mach-omap2/board-generic.c +++ b/arch/arm/mach-omap2/board-generic.c @@ -114,6 +114,7 @@ DT_MACHINE_START(AM33XX_DT, "Generic AM33XX (Flattened Device Tree)") .init_machine = omap_generic_init, .timer = &omap3_am33xx_timer, .dt_compat = am33xx_boards_compat, + .restart = omap_prcm_restart, MACHINE_END #endif diff --git a/arch/arm/mach-omap2/prcm.c b/arch/arm/mach-omap2/prcm.c index 0f51e03..490f8f6 100644 --- a/arch/arm/mach-omap2/prcm.c +++ b/arch/arm/mach-omap2/prcm.c @@ -33,6 +33,7 @@ #include "cm2xxx_3xxx.h" #include "prm2xxx_3xxx.h" #include "prm44xx.h" +#include "prm33xx.h" #include "prminst44xx.h" #include "cminst44xx.h" #include "prm-regbits-24xx.h" @@ -72,6 +73,8 @@ void omap_prcm_restart(char mode, const char *cmd) omap3_ctrl_write_boot_mode((cmd ? (u8)*cmd : 0)); } else if (cpu_is_omap44xx()) { omap4_prminst_global_warm_sw_reset(); /* never returns */ + } else if (soc_is_am33xx()) { + am33xx_prm_global_warm_sw_reset(); /* never returns */ } else { WARN_ON(1); } diff --git a/arch/arm/mach-omap2/prm33xx.c b/arch/arm/mach-omap2/prm33xx.c index e7dbb6c..505219d 100644 --- a/arch/arm/mach-omap2/prm33xx.c +++ b/arch/arm/mach-omap2/prm33xx.c @@ -133,3 +133,18 @@ int am33xx_prm_deassert_hardreset(u8 shift, s16 inst, return (c == MAX_MODULE_HARDRESET_WAIT) ? -EBUSY : 0; } + +void am33xx_prm_global_warm_sw_reset(void) +{ + u32 v; + + v = am33xx_prm_read_reg(AM33XX_PRM_DEVICE_MOD, + AM33XX_PRM_RSTCTRL_OFFSET); + v |= AM33XX_GLOBAL_WARM_SW_RST_MASK; + am33xx_prm_write_reg(v, AM33XX_PRM_DEVICE_MOD, + AM33XX_PRM_RSTCTRL_OFFSET); + + /* OCP barrier */ + v = am33xx_prm_read_reg(AM33XX_PRM_DEVICE_MOD, + AM33XX_PRM_RSTCTRL_OFFSET); +} diff --git a/arch/arm/mach-omap2/prm33xx.h b/arch/arm/mach-omap2/prm33xx.h index 3f25c56..cdfc694 100644 --- a/arch/arm/mach-omap2/prm33xx.h +++ b/arch/arm/mach-omap2/prm33xx.h @@ -126,4 +126,5 @@ extern int am33xx_prm_is_hardreset_asserted(u8 shift, s16 inst, extern int am33xx_prm_assert_hardreset(u8 shift, s16 inst, u16 rstctrl_offs); extern int am33xx_prm_deassert_hardreset(u8 shift, s16 inst, u16 rstctrl_offs, u16 rstst_offs); +extern void am33xx_prm_global_warm_sw_reset(void);