From f292d1bf83ec160bef2532b58aa08f5b71041923 Mon Sep 17 00:00:00 2001 Message-Id: In-Reply-To: <3cf212c4ce6cd72c09bc47f35f539ba0afd4d106.1678716918.git.lorenzo@kernel.org> References: <3cf212c4ce6cd72c09bc47f35f539ba0afd4d106.1678716918.git.lorenzo@kernel.org> From: Lorenzo Bianconi Date: Sat, 11 Mar 2023 18:13:04 +0100 Subject: [PATCH net-next 2/2] net: ethernet: mtk_wed: move cpuboot in a dedicated dts node Since the cpuboot memory region is not part of the RAM SoC, move cpuboot in a deidicated syscon node. This patch helps to keep backward-compatibility with older version of uboot codebase where we have a limit of 8 reserved-memory dts child nodes. Keep backward-compatibility with older dts version where cpuboot was defined as reserved-memory child node. Signed-off-by: Lorenzo Bianconi --- drivers/net/ethernet/mediatek/mtk_wed_mcu.c | 34 +++++++++++++++++---- drivers/net/ethernet/mediatek/mtk_wed_wo.h | 3 +- 2 files changed, 30 insertions(+), 7 deletions(-) --- a/drivers/net/ethernet/mediatek/mtk_wed_mcu.c +++ b/drivers/net/ethernet/mediatek/mtk_wed_mcu.c @@ -18,12 +18,23 @@ static u32 wo_r32(struct mtk_wed_wo *wo, u32 reg) { - return readl(wo->boot.addr + reg); + u32 val; + + if (!wo->boot_regmap) + return readl(wo->boot.addr + reg); + + if (regmap_read(wo->boot_regmap, reg, &val)) + val = ~0; + + return val; } static void wo_w32(struct mtk_wed_wo *wo, u32 reg, u32 val) { - writel(val, wo->boot.addr + reg); + if (wo->boot_regmap) + regmap_write(wo->boot_regmap, reg, val); + else + writel(val, wo->boot.addr + reg); } static struct sk_buff * @@ -316,10 +327,21 @@ mtk_wed_mcu_load_firmware(struct mtk_wed return ret; } - wo->boot.name = "wo-boot"; - ret = mtk_wed_get_reserved_memory_region(wo, &wo->boot); - if (ret) - return ret; + wo->boot_regmap = syscon_regmap_lookup_by_phandle(wo->hw->node, + "mediatek,wo-cpuboot"); + if (IS_ERR(wo->boot_regmap)) { + if (wo->boot_regmap != ERR_PTR(-ENODEV)) + return PTR_ERR(wo->boot_regmap); + + /* For backward compatibility, we need to check if cpu_boot + * is defined through reserved memory property. + */ + wo->boot_regmap = NULL; + wo->boot.name = "wo-boot"; + ret = mtk_wed_get_reserved_memory_region(wo, &wo->boot); + if (ret) + return ret; + } /* set dummy cr */ wed_w32(wo->hw->wed_dev, MTK_WED_SCR0 + 4 * MTK_WED_DUMMY_CR_FWDL, --- a/drivers/net/ethernet/mediatek/mtk_wed_wo.h +++ b/drivers/net/ethernet/mediatek/mtk_wed_wo.h @@ -228,7 +228,8 @@ struct mtk_wed_wo_queue { struct mtk_wed_wo { struct mtk_wed_hw *hw; - struct mtk_wed_wo_memory_region boot; + struct mtk_wed_wo_memory_region boot; /* backward compatibility */ + struct regmap *boot_regmap; struct mtk_wed_wo_queue q_tx; struct mtk_wed_wo_queue q_rx;