From 76866600f544f00928ee9b5b2799a091ea9b80a7 Mon Sep 17 00:00:00 2001 From: Tony O'Brien <tony.obrien@alliedtelesis.co.nz> Date: Fri, 6 Jan 2017 17:29:45 +1300 Subject: [PATCH] powerpc: Enable flush and invalidate dcache by range for MPC85xx Commit ac337168a unified functions to flush and invalidate dcache by range. These two functions were no-ops for SoCs other than 4xx and MPC86xx. Adding these functions seemed to be correct but introduced issues in some drivers when the dcache was flushed. While the root cause was under investigation, these functions were disabled in Commit cb1629f91a for affected SoCs, including the MPC85xx, to make the various drivers work. On the T208x USB stopped working after v2016.07 was pulled. After re-enabling the dcache functions for the MPC85xx it started working again. The USB and DPPA Ethernet drivers have been seen as operational after this change but other drivers cannot be tested. Reviewed-by: Chris Packham <chris.packham@alliedtelesis.co.nz> Signed-off-by: Tony O'Brien <tony.obrien@alliedtelesis.co.nz> Cc: Marek Vasut <marex@denx.de> Cc: York Sun <york.sun@nxp.com> Reviewed-by: York Sun <york.sun> --- arch/powerpc/lib/ppccache.S | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/lib/ppccache.S b/arch/powerpc/lib/ppccache.S index 66cf02dbd0..ad28c7c369 100644 --- a/arch/powerpc/lib/ppccache.S +++ b/arch/powerpc/lib/ppccache.S @@ -65,7 +65,7 @@ ppcSync: * flush_dcache_range(unsigned long start, unsigned long stop) */ _GLOBAL(flush_dcache_range) -#if defined(CONFIG_4xx) || defined(CONFIG_MPC86xx) +#if defined(CONFIG_4xx) || defined(CONFIG_MPC85xx) || defined(CONFIG_MPC86xx) li r5,L1_CACHE_BYTES-1 andc r3,r3,r5 subf r4,r3,r4 @@ -89,7 +89,7 @@ _GLOBAL(flush_dcache_range) * invalidate_dcache_range(unsigned long start, unsigned long stop) */ _GLOBAL(invalidate_dcache_range) -#if defined(CONFIG_4xx) || defined(CONFIG_MPC86xx) +#if defined(CONFIG_4xx) || defined(CONFIG_MPC85xx) || defined(CONFIG_MPC86xx) li r5,L1_CACHE_BYTES-1 andc r3,r3,r5 subf r4,r3,r4 -- 2.39.5