From: Tero Kristo Date: Mon, 27 Oct 2014 15:39:25 +0000 (-0700) Subject: ARM: OMAP2+: PRM: add generic API for checking hardreset status X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=1bc28b3472dc44e6282b464fdb851adcea859be7;p=linux-beck.git ARM: OMAP2+: PRM: add generic API for checking hardreset status PRM driver now has a generic API for checking hardreset status. SoC specific support functions are registered through the prm_ll_data. Signed-off-by: Tero Kristo Acked-by: Paul Walmsley Tested-by: Nishanth Menon Signed-off-by: Tony Lindgren --- diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c index 4159368edfe7..48f0d4d29c1b 100644 --- a/arch/arm/mach-omap2/omap_hwmod.c +++ b/arch/arm/mach-omap2/omap_hwmod.c @@ -2951,8 +2951,8 @@ static int _omap2_deassert_hardreset(struct omap_hwmod *oh, static int _omap2_is_hardreset_asserted(struct omap_hwmod *oh, struct omap_hwmod_rst_info *ohri) { - return omap2_prm_is_hardreset_asserted(oh->prcm.omap2.module_offs, - ohri->st_shift); + return omap_prm_is_hardreset_asserted(ohri->st_shift, 0, + oh->prcm.omap2.module_offs, 0); } /** @@ -3024,10 +3024,11 @@ static int _omap4_is_hardreset_asserted(struct omap_hwmod *oh, if (!oh->clkdm) return -EINVAL; - return omap4_prminst_is_hardreset_asserted(ohri->rst_shift, - oh->clkdm->pwrdm.ptr->prcm_partition, - oh->clkdm->pwrdm.ptr->prcm_offs, - oh->prcm.omap4.rstctrl_offs); + return omap_prm_is_hardreset_asserted(ohri->rst_shift, + oh->clkdm->pwrdm.ptr-> + prcm_partition, + oh->clkdm->pwrdm.ptr->prcm_offs, + oh->prcm.omap4.rstctrl_offs); } /** @@ -3087,9 +3088,9 @@ static int _am33xx_deassert_hardreset(struct omap_hwmod *oh, static int _am33xx_is_hardreset_asserted(struct omap_hwmod *oh, struct omap_hwmod_rst_info *ohri) { - return am33xx_prm_is_hardreset_asserted(ohri->rst_shift, - oh->clkdm->pwrdm.ptr->prcm_offs, - oh->prcm.omap4.rstctrl_offs); + return omap_prm_is_hardreset_asserted(ohri->rst_shift, 0, + oh->clkdm->pwrdm.ptr->prcm_offs, + oh->prcm.omap4.rstctrl_offs); } /* Public functions */ diff --git a/arch/arm/mach-omap2/prm.h b/arch/arm/mach-omap2/prm.h index 26bf3e604d3c..d72dd7120920 100644 --- a/arch/arm/mach-omap2/prm.h +++ b/arch/arm/mach-omap2/prm.h @@ -152,6 +152,7 @@ extern int prm_unregister(struct prm_ll_data *pld); int omap_prm_assert_hardreset(u8 shift, u8 part, s16 prm_mod, u16 offset); int omap_prm_deassert_hardreset(u8 shift, u8 st_shift, u8 part, s16 prm_mod, u16 offset, u16 st_offset); +int omap_prm_is_hardreset_asserted(u8 shift, u8 part, s16 prm_mod, u16 offset); extern u32 prm_read_reset_sources(void); extern bool prm_was_any_context_lost_old(u8 part, s16 inst, u16 idx); extern void prm_clear_context_loss_flags_old(u8 part, s16 inst, u16 idx); diff --git a/arch/arm/mach-omap2/prm2xxx.c b/arch/arm/mach-omap2/prm2xxx.c index 343fc734c61e..54ae55520da6 100644 --- a/arch/arm/mach-omap2/prm2xxx.c +++ b/arch/arm/mach-omap2/prm2xxx.c @@ -214,6 +214,7 @@ static struct prm_ll_data omap2xxx_prm_ll_data = { .read_reset_sources = &omap2xxx_prm_read_reset_sources, .assert_hardreset = &omap2_prm_assert_hardreset, .deassert_hardreset = &omap2_prm_deassert_hardreset, + .is_hardreset_asserted = &omap2_prm_is_hardreset_asserted, }; int __init omap2xxx_prm_init(void) diff --git a/arch/arm/mach-omap2/prm2xxx_3xxx.c b/arch/arm/mach-omap2/prm2xxx_3xxx.c index 9466b1ea63a9..cc3341f263cd 100644 --- a/arch/arm/mach-omap2/prm2xxx_3xxx.c +++ b/arch/arm/mach-omap2/prm2xxx_3xxx.c @@ -24,14 +24,16 @@ /** * omap2_prm_is_hardreset_asserted - read the HW reset line state of * submodules contained in the hwmod module - * @prm_mod: PRM submodule base (e.g. CORE_MOD) * @shift: register bit shift corresponding to the reset line to check + * @part: PRM partition, ignored for OMAP2 + * @prm_mod: PRM submodule base (e.g. CORE_MOD) + * @offset: register offset, ignored for OMAP2 * * Returns 1 if the (sub)module hardreset line is currently asserted, * 0 if the (sub)module hardreset line is not currently asserted, or * -EINVAL if called while running on a non-OMAP2/3 chip. */ -int omap2_prm_is_hardreset_asserted(s16 prm_mod, u8 shift) +int omap2_prm_is_hardreset_asserted(u8 shift, u8 part, s16 prm_mod, u16 offset) { return omap2_prm_read_mod_bits_shift(prm_mod, OMAP2_RM_RSTCTRL, (1 << shift)); diff --git a/arch/arm/mach-omap2/prm2xxx_3xxx.h b/arch/arm/mach-omap2/prm2xxx_3xxx.h index 253d4148737d..f57e29b0e041 100644 --- a/arch/arm/mach-omap2/prm2xxx_3xxx.h +++ b/arch/arm/mach-omap2/prm2xxx_3xxx.h @@ -100,7 +100,7 @@ static inline u32 omap2_prm_clear_mod_reg_bits(u32 bits, s16 module, s16 idx) } /* These omap2_ PRM functions apply to both OMAP2 and 3 */ -extern int omap2_prm_is_hardreset_asserted(s16 prm_mod, u8 shift); +int omap2_prm_is_hardreset_asserted(u8 shift, u8 part, s16 prm_mod, u16 offset); int omap2_prm_assert_hardreset(u8 shift, u8 part, s16 prm_mod, u16 offset); int omap2_prm_deassert_hardreset(u8 rst_shift, u8 st_shift, u8 part, diff --git a/arch/arm/mach-omap2/prm33xx.c b/arch/arm/mach-omap2/prm33xx.c index ea0fea68e36c..3cbfb78ed5e9 100644 --- a/arch/arm/mach-omap2/prm33xx.c +++ b/arch/arm/mach-omap2/prm33xx.c @@ -52,6 +52,7 @@ u32 am33xx_prm_rmw_reg_bits(u32 mask, u32 bits, s16 inst, s16 idx) * am33xx_prm_is_hardreset_asserted - read the HW reset line state of * submodules contained in the hwmod module * @shift: register bit shift corresponding to the reset line to check + * @part: PRM partition, ignored for AM33xx * @inst: CM instance register offset (*_INST macro) * @rstctrl_offs: RM_RSTCTRL register address offset for this module * @@ -59,7 +60,8 @@ u32 am33xx_prm_rmw_reg_bits(u32 mask, u32 bits, s16 inst, s16 idx) * 0 if the (sub)module hardreset line is not currently asserted, or * -EINVAL upon parameter error. */ -int am33xx_prm_is_hardreset_asserted(u8 shift, s16 inst, u16 rstctrl_offs) +static int am33xx_prm_is_hardreset_asserted(u8 shift, u8 part, s16 inst, + u16 rstctrl_offs) { u32 v; @@ -121,7 +123,7 @@ static int am33xx_prm_deassert_hardreset(u8 shift, u8 st_shift, u8 part, u32 mask = 1 << st_shift; /* Check the current status to avoid de-asserting the line twice */ - if (am33xx_prm_is_hardreset_asserted(shift, inst, rstctrl_offs) == 0) + if (am33xx_prm_is_hardreset_asserted(shift, 0, inst, rstctrl_offs) == 0) return -EEXIST; /* Clear the reset status by writing 1 to the status bit */ @@ -133,7 +135,7 @@ static int am33xx_prm_deassert_hardreset(u8 shift, u8 st_shift, u8 part, am33xx_prm_rmw_reg_bits(mask, 0, inst, rstctrl_offs); /* wait the status to be set */ - omap_test_timeout(am33xx_prm_is_hardreset_asserted(st_shift, inst, + omap_test_timeout(am33xx_prm_is_hardreset_asserted(st_shift, 0, inst, rstst_offs), MAX_MODULE_HARDRESET_WAIT, c); @@ -351,6 +353,7 @@ struct pwrdm_ops am33xx_pwrdm_operations = { static struct prm_ll_data am33xx_prm_ll_data = { .assert_hardreset = am33xx_prm_assert_hardreset, .deassert_hardreset = am33xx_prm_deassert_hardreset, + .is_hardreset_asserted = am33xx_prm_is_hardreset_asserted, }; int __init am33xx_prm_init(void) diff --git a/arch/arm/mach-omap2/prm33xx.h b/arch/arm/mach-omap2/prm33xx.h index 6d483e02c104..49ad5b862919 100644 --- a/arch/arm/mach-omap2/prm33xx.h +++ b/arch/arm/mach-omap2/prm33xx.h @@ -122,8 +122,6 @@ extern u32 am33xx_prm_read_reg(s16 inst, u16 idx); extern void am33xx_prm_write_reg(u32 val, s16 inst, u16 idx); extern u32 am33xx_prm_rmw_reg_bits(u32 mask, u32 bits, s16 inst, s16 idx); extern void am33xx_prm_global_warm_sw_reset(void); -extern int am33xx_prm_is_hardreset_asserted(u8 shift, s16 inst, - u16 rstctrl_offs); int am33xx_prm_init(void); #endif /* ASSEMBLER */ diff --git a/arch/arm/mach-omap2/prm3xxx.c b/arch/arm/mach-omap2/prm3xxx.c index 7298311c9ab7..956e0ca2fb64 100644 --- a/arch/arm/mach-omap2/prm3xxx.c +++ b/arch/arm/mach-omap2/prm3xxx.c @@ -666,6 +666,7 @@ static struct prm_ll_data omap3xxx_prm_ll_data = { .late_init = &omap3xxx_prm_late_init, .assert_hardreset = &omap2_prm_assert_hardreset, .deassert_hardreset = &omap2_prm_deassert_hardreset, + .is_hardreset_asserted = &omap2_prm_is_hardreset_asserted, }; int __init omap3xxx_prm_init(void) diff --git a/arch/arm/mach-omap2/prm44xx.c b/arch/arm/mach-omap2/prm44xx.c index 0da2ba854412..d357ca901b75 100644 --- a/arch/arm/mach-omap2/prm44xx.c +++ b/arch/arm/mach-omap2/prm44xx.c @@ -690,6 +690,7 @@ static struct prm_ll_data omap44xx_prm_ll_data = { .late_init = &omap44xx_prm_late_init, .assert_hardreset = omap4_prminst_assert_hardreset, .deassert_hardreset = omap4_prminst_deassert_hardreset, + .is_hardreset_asserted = omap4_prminst_is_hardreset_asserted, }; int __init omap44xx_prm_init(void) diff --git a/arch/arm/mach-omap2/prm_common.c b/arch/arm/mach-omap2/prm_common.c index 912d99c4d75d..ce0434a16ad6 100644 --- a/arch/arm/mach-omap2/prm_common.c +++ b/arch/arm/mach-omap2/prm_common.c @@ -466,6 +466,26 @@ int omap_prm_deassert_hardreset(u8 shift, u8 st_shift, u8 part, s16 prm_mod, offset, st_offset); } +/** + * omap_prm_is_hardreset_asserted - check the hardreset status for an IP block + * @shift: register bit shift corresponding to the reset line + * @part: PRM partition + * @prm_mod: PRM submodule base or instance offset + * @offset: register offset + * + * Checks if a hardware reset line for an IP block is enabled or not. + */ +int omap_prm_is_hardreset_asserted(u8 shift, u8 part, s16 prm_mod, u16 offset) +{ + if (!prm_ll_data->is_hardreset_asserted) { + WARN_ONCE(1, "prm: %s: no mapping function defined\n", + __func__); + return -EINVAL; + } + + return prm_ll_data->is_hardreset_asserted(shift, part, prm_mod, offset); +} + /** * prm_register - register per-SoC low-level data with the PRM * @pld: low-level per-SoC OMAP PRM data & function pointers to register