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| author | Tero Kristo <t-kristo@ti.com> | 2014-02-26 11:54:29 +0200 |
|---|---|---|
| committer | Tero Kristo <t-kristo@ti.com> | 2014-07-04 17:02:14 +0300 |
| commit | 9efcea09b0b56488e46ab3a36fe8dbce9eded529 (patch) | |
| tree | 8178e61ea7c2636384ab979391e4165b6db1a152 /arch/arm/mach-omap2/prm3xxx.c | |
| parent | 55c6c3ad90f606d458d798b36f8ffca98c1894e0 (diff) | |
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/mach-omap2/prm3xxx.c')
| -rw-r--r-- | arch/arm/mach-omap2/prm3xxx.c | 20 |
1 files changed, 20 insertions, 0 deletions
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) |