diff options
| author | Tero Kristo <t-kristo@ti.com> | 2013-10-11 20:15:34 +0400 |
|---|---|---|
| committer | Paul Walmsley <paul@pwsan.com> | 2013-10-19 20:11:52 +0400 |
| commit | c6a2d839d0dba8a06f55c7b06f8ce33bdbe4aea3 (patch) | |
| tree | 29e69f442137dc6e16cb6f9a083b5b3846a7632f /arch/arm/mach-omap2/cm3xxx.c | |
| parent | 7a90da2ad3fdd44a6230c0e2c0a374a5cda1711c (diff) | |
| download | linux-c6a2d839d0dba8a06f55c7b06f8ce33bdbe4aea3.tar.xz | |
ARM: OMAP3: CM/control: move CM scratchpad save to CM driver
OMAP3 PM code for off-mode currently saves the scratchpad contents for CM
registers within OMAP control module driver. However, as we are separating
CM code into its own driver, this must be moved also. This patch adds a
new API for saving the CM scratchpad contents and uses this from the high
level scratchpad save function.
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Diffstat (limited to 'arch/arm/mach-omap2/cm3xxx.c')
| -rw-r--r-- | arch/arm/mach-omap2/cm3xxx.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/cm3xxx.c b/arch/arm/mach-omap2/cm3xxx.c index 9061c307d915..f6f028867bfe 100644 --- a/arch/arm/mach-omap2/cm3xxx.c +++ b/arch/arm/mach-omap2/cm3xxx.c @@ -636,6 +636,28 @@ void omap3_cm_restore_context(void) OMAP3_CM_CLKOUT_CTRL_OFFSET); } +void omap3_cm_save_scratchpad_contents(u32 *ptr) +{ + *ptr++ = omap2_cm_read_mod_reg(CORE_MOD, CM_CLKSEL); + *ptr++ = omap2_cm_read_mod_reg(WKUP_MOD, CM_CLKSEL); + *ptr++ = omap2_cm_read_mod_reg(PLL_MOD, CM_CLKEN); + + /* + * As per erratum i671, ROM code does not respect the PER DPLL + * programming scheme if CM_AUTOIDLE_PLL..AUTO_PERIPH_DPLL == 1. + * Then, in anycase, clear these bits to avoid extra latencies. + */ + *ptr++ = omap2_cm_read_mod_reg(PLL_MOD, CM_AUTOIDLE) & + ~OMAP3430_AUTO_PERIPH_DPLL_MASK; + *ptr++ = omap2_cm_read_mod_reg(PLL_MOD, OMAP3430_CM_CLKSEL1_PLL); + *ptr++ = omap2_cm_read_mod_reg(PLL_MOD, OMAP3430_CM_CLKSEL2_PLL); + *ptr++ = omap2_cm_read_mod_reg(PLL_MOD, OMAP3430_CM_CLKSEL3); + *ptr++ = omap2_cm_read_mod_reg(MPU_MOD, OMAP3430_CM_CLKEN_PLL); + *ptr++ = omap2_cm_read_mod_reg(MPU_MOD, OMAP3430_CM_AUTOIDLE_PLL); + *ptr++ = omap2_cm_read_mod_reg(MPU_MOD, OMAP3430_CM_CLKSEL1_PLL); + *ptr++ = omap2_cm_read_mod_reg(MPU_MOD, OMAP3430_CM_CLKSEL2_PLL); +} + /* * */ |