diff options
| author | Tero Kristo <t-kristo@ti.com> | 2014-02-26 13:54:29 +0400 |
|---|---|---|
| committer | Tero Kristo <t-kristo@ti.com> | 2014-07-04 18:02:14 +0400 |
| commit | 9efcea09b0b56488e46ab3a36fe8dbce9eded529 (patch) | |
| tree | 8178e61ea7c2636384ab979391e4165b6db1a152 /arch/arm | |
| parent | 55c6c3ad90f606d458d798b36f8ffca98c1894e0 (diff) | |
| download | linux-9efcea09b0b56488e46ab3a36fe8dbce9eded529.tar.xz | |
ARM: OMAP3: PRM: add API for checking and clearing cold reset status
This isolates the PRM register access within the PRM driver.
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mach-omap2/control.c | 6 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/prm3xxx.c | 20 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/prm3xxx.h | 1 |
3 files changed, 22 insertions, 5 deletions
diff --git a/arch/arm/mach-omap2/control.c b/arch/arm/mach-omap2/control.c index 751f3549bf6f..f8eb3e4354ad 100644 --- a/arch/arm/mach-omap2/control.c +++ b/arch/arm/mach-omap2/control.c @@ -282,13 +282,9 @@ void omap3_clear_scratchpad_contents(void) void __iomem *v_addr; u32 offset = 0; v_addr = OMAP2_L4_IO_ADDRESS(OMAP343X_SCRATCHPAD_ROM); - if (omap2_prm_read_mod_reg(OMAP3430_GR_MOD, OMAP3_PRM_RSTST_OFFSET) & - OMAP3430_GLOBAL_COLD_RST_MASK) { + if (omap3xxx_prm_clear_global_cold_reset()) { for ( ; offset <= max_offset; offset += 0x4) writel_relaxed(0x0, (v_addr + offset)); - omap2_prm_set_mod_reg_bits(OMAP3430_GLOBAL_COLD_RST_MASK, - OMAP3430_GR_MOD, - OMAP3_PRM_RSTST_OFFSET); } } diff --git a/arch/arm/mach-omap2/prm3xxx.c b/arch/arm/mach-omap2/prm3xxx.c index e46ff7184c9d..4733c28d9d64 100644 --- a/arch/arm/mach-omap2/prm3xxx.c +++ b/arch/arm/mach-omap2/prm3xxx.c @@ -389,6 +389,26 @@ void omap3xxx_prm_iva_idle(void) OMAP3430_IVA2_MOD, OMAP2_RM_RSTCTRL); } +/** + * omap3xxx_prm_clear_global_cold_reset - checks the global cold reset status + * and clears it if asserted + * + * Checks if cold-reset has occurred and clears the status bit if yes. Returns + * 1 if cold-reset has occurred, 0 otherwise. + */ +int omap3xxx_prm_clear_global_cold_reset(void) +{ + if (omap2_prm_read_mod_reg(OMAP3430_GR_MOD, OMAP3_PRM_RSTST_OFFSET) & + OMAP3430_GLOBAL_COLD_RST_MASK) { + omap2_prm_set_mod_reg_bits(OMAP3430_GLOBAL_COLD_RST_MASK, + OMAP3430_GR_MOD, + OMAP3_PRM_RSTST_OFFSET); + return 1; + } + + return 0; +} + /* Powerdomain low-level functions */ static int omap3_pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst) diff --git a/arch/arm/mach-omap2/prm3xxx.h b/arch/arm/mach-omap2/prm3xxx.h index 21eb1d5ba524..7548ae0e86d5 100644 --- a/arch/arm/mach-omap2/prm3xxx.h +++ b/arch/arm/mach-omap2/prm3xxx.h @@ -165,6 +165,7 @@ extern u32 omap3xxx_prm_get_reset_sources(void); int omap3xxx_prm_clear_mod_irqs(s16 module, u8 regs, u32 ignore_bits); void omap3xxx_prm_iva_idle(void); void omap3_prm_reset_modem(void); +int omap3xxx_prm_clear_global_cold_reset(void); #endif /* __ASSEMBLER */ |