From: Rajendra Nayak <[email protected]> This patch fixes a bug in the CORE dpll scaling sequence which was errouneously clearing some bits in the SDRC DLLA CTRL register and hence causing a freeze. The issue was observed only on platforms which scale CORE dpll to < 83Mhz and hence program the DLL in fixed delay mode.
Issue reported by Limei Wang <[email protected]>, with debugging assistance from Richard Woodruff <[email protected]> and Girish Ghongdemath <[email protected]>. Signed-off-by: Rajendra Nayak <[email protected]> Cc: Limei Wang <[email protected]> Cc: Richard Woodruff <[email protected]> Cc: Girish Ghongdemath <[email protected]> Signed-off-by: Paul Walmsley <[email protected]> [[email protected]: updated patch description to include collaboration credits] --- arch/arm/mach-omap2/sram34xx.S | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/arch/arm/mach-omap2/sram34xx.S b/arch/arm/mach-omap2/sram34xx.S index 9c2d046..e6b1125 100644 --- a/arch/arm/mach-omap2/sram34xx.S +++ b/arch/arm/mach-omap2/sram34xx.S @@ -143,7 +143,7 @@ return_to_sdram: unlock_dll: ldr r11, omap3_sdrc_dlla_ctrl ldr r12, [r11] - and r12, r12, #FIXEDDELAY_MASK + bic r12, r12, #FIXEDDELAY_MASK orr r12, r12, #FIXEDDELAY_DEFAULT orr r12, r12, #DLLIDLE_MASK str r12, [r11] @ (no OCP barrier needed) -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
