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ARM: OMAP2+: PRM: add generic API for deasserting hardware reset 

PRM driver now has a generic API for deasserting hardware resets. SoC
specific support functions are registered through the prm_ll_data.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Paul Walmsley <paul@pwsan.com>
Tested-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Tero Kristo 2014-10-27 08:39:25 -07:00 committed by Tony Lindgren
parent efd44dc35f
commit 37fb59d7e0
12 changed files with 69 additions and 23 deletions
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22
arch/arm/mach-omap2/omap_hwmod.c
View File

@ -2932,9 +2932,8 @@ static int _omap2_assert_hardreset(struct omap_hwmod *oh,
static int _omap2_deassert_hardreset(struct omap_hwmod *oh,
struct omap_hwmod_rst_info *ohri)
{
return omap2_prm_deassert_hardreset(oh->prcm.omap2.module_offs,
ohri->rst_shift,
ohri->st_shift);
return omap_prm_deassert_hardreset(ohri->rst_shift, ohri->st_shift, 0,
oh->prcm.omap2.module_offs, 0, 0);
}
/**
@ -3001,10 +3000,10 @@ static int _omap4_deassert_hardreset(struct omap_hwmod *oh,
if (ohri->st_shift)
pr_err("omap_hwmod: %s: %s: hwmod data error: OMAP4 does not support st_shift\n",
oh->name, ohri->name);
return omap4_prminst_deassert_hardreset(ohri->rst_shift,
oh->clkdm->pwrdm.ptr->prcm_partition,
oh->clkdm->pwrdm.ptr->prcm_offs,
oh->prcm.omap4.rstctrl_offs);
return omap_prm_deassert_hardreset(ohri->rst_shift, 0,
oh->clkdm->pwrdm.ptr->prcm_partition,
oh->clkdm->pwrdm.ptr->prcm_offs,
oh->prcm.omap4.rstctrl_offs, 0);
}
/**
@ -3067,11 +3066,10 @@ static int _am33xx_assert_hardreset(struct omap_hwmod *oh,
static int _am33xx_deassert_hardreset(struct omap_hwmod *oh,
struct omap_hwmod_rst_info *ohri)
{
return am33xx_prm_deassert_hardreset(ohri->rst_shift,
ohri->st_shift,
oh->clkdm->pwrdm.ptr->prcm_offs,
oh->prcm.omap4.rstctrl_offs,
oh->prcm.omap4.rstst_offs);
return omap_prm_deassert_hardreset(ohri->rst_shift, ohri->st_shift, 0,
oh->clkdm->pwrdm.ptr->prcm_offs,
oh->prcm.omap4.rstctrl_offs,
oh->prcm.omap4.rstst_offs);
}
/**

7
arch/arm/mach-omap2/prm.h
View File

@ -129,6 +129,7 @@ struct prm_reset_src_map {
* @clear_context_loss_flags_old: ptr to the SoC PRM context loss flag clear fn
* @late_init: ptr to the late init function
* @assert_hardreset: ptr to the SoC PRM hardreset assert impl
* @deassert_hardreset: ptr to the SoC PRM hardreset deassert impl
*
* XXX @was_any_context_lost_old and @clear_context_loss_flags_old are
* deprecated.
@ -139,12 +140,18 @@ struct prm_ll_data {
void (*clear_context_loss_flags_old)(u8 part, s16 inst, u16 idx);
int (*late_init)(void);
int (*assert_hardreset)(u8 shift, u8 part, s16 prm_mod, u16 offset);
int (*deassert_hardreset)(u8 shift, u8 st_shift, u8 part, s16 prm_mod,
u16 offset, u16 st_offset);
int (*is_hardreset_asserted)(u8 shift, u8 part, s16 prm_mod,
u16 offset);
};
extern int prm_register(struct prm_ll_data *pld);
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);
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);

1
arch/arm/mach-omap2/prm2xxx.c
View File

@ -213,6 +213,7 @@ struct pwrdm_ops omap2_pwrdm_operations = {
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,
};
int __init omap2xxx_prm_init(void)

7
arch/arm/mach-omap2/prm2xxx_3xxx.c
View File

@ -66,6 +66,10 @@ int omap2_prm_assert_hardreset(u8 shift, u8 part, s16 prm_mod, u16 offset)
* @prm_mod: PRM submodule base (e.g. CORE_MOD)
* @rst_shift: register bit shift corresponding to the reset line to deassert
* @st_shift: register bit shift for the status of the deasserted submodule
* @part: PRM partition, not used for OMAP2
* @prm_mod: PRM submodule base (e.g. CORE_MOD)
* @rst_offset: reset register offset, not used for OMAP2
* @st_offset: reset status register offset, not used for OMAP2
*
* Some IPs like dsp or iva contain processors that require an HW
* reset line to be asserted / deasserted in order to fully enable the
@ -76,7 +80,8 @@ int omap2_prm_assert_hardreset(u8 shift, u8 part, s16 prm_mod, u16 offset)
* -EINVAL upon an argument error, -EEXIST if the submodule was already out
* of reset, or -EBUSY if the submodule did not exit reset promptly.
*/
int omap2_prm_deassert_hardreset(s16 prm_mod, u8 rst_shift, u8 st_shift)
int omap2_prm_deassert_hardreset(u8 rst_shift, u8 st_shift, u8 part,
s16 prm_mod, u16 rst_offset, u16 st_offset)
{
u32 rst, st;
int c;

4
arch/arm/mach-omap2/prm2xxx_3xxx.h
View File

@ -103,7 +103,9 @@ static inline u32 omap2_prm_clear_mod_reg_bits(u32 bits, s16 module, s16 idx)
extern int omap2_prm_is_hardreset_asserted(s16 prm_mod, u8 shift);
int omap2_prm_assert_hardreset(u8 shift, u8 part, s16 prm_mod,
u16 offset);
extern int omap2_prm_deassert_hardreset(s16 prm_mod, u8 rst_shift, u8 st_shift);
int omap2_prm_deassert_hardreset(u8 rst_shift, u8 st_shift, u8 part,
s16 prm_mod, u16 reset_offset,
u16 st_offset);
extern int omap2_pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst);
extern int omap2_pwrdm_read_next_pwrst(struct powerdomain *pwrdm);

8
arch/arm/mach-omap2/prm33xx.c
View File

@ -98,6 +98,8 @@ static int am33xx_prm_assert_hardreset(u8 shift, u8 part, s16 inst,
* am33xx_prm_deassert_hardreset - deassert a submodule hardreset line and
* wait
* @shift: register bit shift corresponding to the reset line to deassert
* @st_shift: reset status register bit shift corresponding to the reset line
* @part: PRM partition, not used for AM33xx
* @inst: CM instance register offset (*_INST macro)
* @rstctrl_reg: RM_RSTCTRL register address for this module
* @rstst_reg: RM_RSTST register address for this module
@ -111,8 +113,9 @@ static int am33xx_prm_assert_hardreset(u8 shift, u8 part, s16 inst,
* -EINVAL upon an argument error, -EEXIST if the submodule was already out
* of reset, or -EBUSY if the submodule did not exit reset promptly.
*/
int am33xx_prm_deassert_hardreset(u8 shift, u8 st_shift, s16 inst,
u16 rstctrl_offs, u16 rstst_offs)
static int am33xx_prm_deassert_hardreset(u8 shift, u8 st_shift, u8 part,
s16 inst, u16 rstctrl_offs,
u16 rstst_offs)
{
int c;
u32 mask = 1 << st_shift;
@ -347,6 +350,7 @@ 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,
};
int __init am33xx_prm_init(void)

2
arch/arm/mach-omap2/prm33xx.h
View File

@ -124,8 +124,6 @@ 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);
extern int am33xx_prm_deassert_hardreset(u8 shift, u8 st_shift, s16 inst,
u16 rstctrl_offs, u16 rstst_offs);
int am33xx_prm_init(void);
#endif /* ASSEMBLER */

1
arch/arm/mach-omap2/prm3xxx.c
View File

@ -665,6 +665,7 @@ static struct prm_ll_data omap3xxx_prm_ll_data = {
.read_reset_sources = &omap3xxx_prm_read_reset_sources,
.late_init = &omap3xxx_prm_late_init,
.assert_hardreset = &omap2_prm_assert_hardreset,
.deassert_hardreset = &omap2_prm_deassert_hardreset,
};
int __init omap3xxx_prm_init(void)

1
arch/arm/mach-omap2/prm44xx.c
View File

@ -689,6 +689,7 @@ static struct prm_ll_data omap44xx_prm_ll_data = {
.clear_context_loss_flags_old = &omap44xx_prm_clear_context_loss_flags_old,
.late_init = &omap44xx_prm_late_init,
.assert_hardreset = omap4_prminst_assert_hardreset,
.deassert_hardreset = omap4_prminst_deassert_hardreset,
};
int __init omap44xx_prm_init(void)

24
arch/arm/mach-omap2/prm_common.c
View File

@ -442,6 +442,30 @@ int omap_prm_assert_hardreset(u8 shift, u8 part, s16 prm_mod, u16 offset)
return prm_ll_data->assert_hardreset(shift, part, prm_mod, offset);
}
/**
* omap_prm_deassert_hardreset - deassert hardreset for an IP block
* @shift: register bit shift corresponding to the reset line
* @st_shift: reset status bit shift corresponding to the reset line
* @part: PRM partition
* @prm_mod: PRM submodule base or instance offset
* @offset: register offset
* @st_offset: status register offset
*
* Deasserts a hardware reset line for an IP block.
*/
int omap_prm_deassert_hardreset(u8 shift, u8 st_shift, u8 part, s16 prm_mod,
u16 offset, u16 st_offset)
{
if (!prm_ll_data->deassert_hardreset) {
WARN_ONCE(1, "prm: %s: no mapping function defined\n",
__func__);
return -EINVAL;
}
return prm_ll_data->deassert_hardreset(shift, st_shift, part, prm_mod,
offset, st_offset);
}
/**
* prm_register - register per-SoC low-level data with the PRM
* @pld: low-level per-SoC OMAP PRM data & function pointers to register

10
arch/arm/mach-omap2/prminst44xx.c
View File

@ -148,8 +148,12 @@ int omap4_prminst_assert_hardreset(u8 shift, u8 part, s16 inst,
/**
* omap4_prminst_deassert_hardreset - deassert a submodule hardreset line and
* wait
* @rstctrl_reg: RM_RSTCTRL register address for this module
* @shift: register bit shift corresponding to the reset line to deassert
* @st_shift: status bit offset, not used for OMAP4+
* @part: PRM partition
* @inst: PRM instance offset
* @rstctrl_offs: reset register offset
* @st_offs: reset status register offset, not used for OMAP4+
*
* Some IPs like dsp, ipu or iva contain processors that require an HW
* reset line to be asserted / deasserted in order to fully enable the
@ -160,8 +164,8 @@ int omap4_prminst_assert_hardreset(u8 shift, u8 part, s16 inst,
* -EINVAL upon an argument error, -EEXIST if the submodule was already out
* of reset, or -EBUSY if the submodule did not exit reset promptly.
*/
int omap4_prminst_deassert_hardreset(u8 shift, u8 part, s16 inst,
u16 rstctrl_offs)
int omap4_prminst_deassert_hardreset(u8 shift, u8 st_shift, u8 part, s16 inst,
u16 rstctrl_offs, u16 st_offs)
{
int c;
u32 mask = 1 << shift;

5
arch/arm/mach-omap2/prminst44xx.h
View File

@ -30,8 +30,9 @@ extern int omap4_prminst_is_hardreset_asserted(u8 shift, u8 part, s16 inst,
u16 rstctrl_offs);
extern int omap4_prminst_assert_hardreset(u8 shift, u8 part, s16 inst,
u16 rstctrl_offs);
extern int omap4_prminst_deassert_hardreset(u8 shift, u8 part, s16 inst,
u16 rstctrl_offs);
int omap4_prminst_deassert_hardreset(u8 shift, u8 st_shift, u8 part,
s16 inst, u16 rstctrl_offs,
u16 rstst_offs);
extern void omap_prm_base_init(void);