From: John Keeping Date: Fri, 15 Jul 2016 16:33:23 +0000 (+0100) Subject: rockchip: sdram: Fix register layout for Linux X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=c482c60a14e5fa44a62e13bab4d07c52c37915dc;p=u-boot.git rockchip: sdram: Fix register layout for Linux The ChromeOS kernel reads the RAM settings from PMU_SYS_REG2 and expects the bootloader to store the necessary information there. We're using the same register to pass the same information between the SPL and U-Boot but in a slightly different format. Change this to use the format expected by the Linux DMC driver so that the system doesn't hang in Linux by misconfiguring the RAM. This is almost the same as commit b5788dc ("rockchip: rk3288: correct sdram setting") which was reverted in commit b525556 ("Revert "rockchip: rk3288: correct sdram setting"") but parenthese have been added to apply the mask correctly when reading the "bw" setting and a couple of minor style issues have been fixed to keep check_patch.pl happy. Signed-off-by: John Keeping Reviewed-by: Tom Rini Acked-by: Simon Glass --- diff --git a/arch/arm/mach-rockchip/rk3288/sdram_rk3288.c b/arch/arm/mach-rockchip/rk3288/sdram_rk3288.c index 4364d5a504..cf9ef2e845 100644 --- a/arch/arm/mach-rockchip/rk3288/sdram_rk3288.c +++ b/arch/arm/mach-rockchip/rk3288/sdram_rk3288.c @@ -575,14 +575,14 @@ static void dram_all_config(const struct dram_info *dram, &sdram_params->ch[chan]; sys_reg |= info->row_3_4 << SYS_REG_ROW_3_4_SHIFT(chan); - sys_reg |= chan << SYS_REG_CHINFO_SHIFT(chan); + sys_reg |= 1 << SYS_REG_CHINFO_SHIFT(chan); sys_reg |= (info->rank - 1) << SYS_REG_RANK_SHIFT(chan); sys_reg |= (info->col - 9) << SYS_REG_COL_SHIFT(chan); - sys_reg |= info->bk == 3 ? 1 << SYS_REG_BK_SHIFT(chan) : 0; + sys_reg |= info->bk == 3 ? 0 : 1 << SYS_REG_BK_SHIFT(chan); sys_reg |= (info->cs0_row - 13) << SYS_REG_CS0_ROW_SHIFT(chan); sys_reg |= (info->cs1_row - 13) << SYS_REG_CS1_ROW_SHIFT(chan); - sys_reg |= info->bw << SYS_REG_BW_SHIFT(chan); - sys_reg |= info->dbw << SYS_REG_DBW_SHIFT(chan); + sys_reg |= (2 >> info->bw) << SYS_REG_BW_SHIFT(chan); + sys_reg |= (2 >> info->dbw) << SYS_REG_DBW_SHIFT(chan); dram_cfg_rbc(&dram->chan[chan], chan, sdram_params); } @@ -734,13 +734,13 @@ size_t sdram_size_mb(struct rk3288_pmu *pmu) rank = 1 + (sys_reg >> SYS_REG_RANK_SHIFT(ch) & SYS_REG_RANK_MASK); col = 9 + (sys_reg >> SYS_REG_COL_SHIFT(ch) & SYS_REG_COL_MASK); - bk = sys_reg & (1 << SYS_REG_BK_SHIFT(ch)) ? 3 : 0; + bk = 3 - ((sys_reg >> SYS_REG_BK_SHIFT(ch)) & SYS_REG_BK_MASK); cs0_row = 13 + (sys_reg >> SYS_REG_CS0_ROW_SHIFT(ch) & SYS_REG_CS0_ROW_MASK); cs1_row = 13 + (sys_reg >> SYS_REG_CS1_ROW_SHIFT(ch) & SYS_REG_CS1_ROW_MASK); - bw = (sys_reg >> SYS_REG_BW_SHIFT(ch)) & - SYS_REG_BW_MASK; + bw = (2 >> ((sys_reg >> SYS_REG_BW_SHIFT(ch)) & + SYS_REG_BW_MASK)); row_3_4 = sys_reg >> SYS_REG_ROW_3_4_SHIFT(ch) & SYS_REG_ROW_3_4_MASK;