Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934296AbaJ2QYU (ORCPT ); Wed, 29 Oct 2014 12:24:20 -0400 Received: from mail-wg0-f51.google.com ([74.125.82.51]:36773 "EHLO mail-wg0-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932994AbaJ2QYP (ORCPT ); Wed, 29 Oct 2014 12:24:15 -0400 From: Tomeu Vizoso To: linux-tegra@vger.kernel.org Cc: Javier Martinez Canillas , Mikko Perttunen , Tomeu Vizoso , Stephen Warren , Thierry Reding , Alexandre Courbot , Peter De Schrijver , linux-kernel@vger.kernel.org Subject: [PATCH v3 03/13] soc/tegra: Add ram code reader helper Date: Wed, 29 Oct 2014 17:22:21 +0100 Message-Id: <1414599796-30597-4-git-send-email-tomeu.vizoso@collabora.com> X-Mailer: git-send-email 1.9.3 In-Reply-To: <1414599796-30597-1-git-send-email-tomeu.vizoso@collabora.com> References: <1414599796-30597-1-git-send-email-tomeu.vizoso@collabora.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Mikko Perttunen Needed for the EMC and MC drivers to know what timings from the DT to use. Signed-off-by: Mikko Perttunen Signed-off-by: Tomeu Vizoso --- drivers/soc/tegra/fuse/tegra-apbmisc.c | 19 +++++++++++++++++++ include/soc/tegra/fuse.h | 1 + 2 files changed, 20 insertions(+) diff --git a/drivers/soc/tegra/fuse/tegra-apbmisc.c b/drivers/soc/tegra/fuse/tegra-apbmisc.c index 3bf5aba..e580892 100644 --- a/drivers/soc/tegra/fuse/tegra-apbmisc.c +++ b/drivers/soc/tegra/fuse/tegra-apbmisc.c @@ -28,8 +28,13 @@ #define APBMISC_SIZE 0x64 #define FUSE_SKU_INFO 0x10 +#define PMC_STRAPPING_OPT_A_RAM_CODE_MASK_LONG (0xf << 4) +#define PMC_STRAPPING_OPT_A_RAM_CODE_MASK_SHORT (0x3 << 4) +#define PMC_STRAPPING_OPT_A_RAM_CODE_SHIFT 4 + static void __iomem *apbmisc_base; static void __iomem *strapping_base; +static bool long_ram_code; u32 tegra_read_chipid(void) { @@ -54,6 +59,18 @@ u32 tegra_read_straps(void) return 0; } +u32 tegra_read_ram_code(void) +{ + u32 straps = tegra_read_straps(); + + if (long_ram_code) + straps &= PMC_STRAPPING_OPT_A_RAM_CODE_MASK_LONG; + else + straps &= PMC_STRAPPING_OPT_A_RAM_CODE_MASK_SHORT; + + return straps >> PMC_STRAPPING_OPT_A_RAM_CODE_SHIFT; +} + static const struct of_device_id apbmisc_match[] __initconst = { { .compatible = "nvidia,tegra20-apbmisc", }, {}, @@ -112,4 +129,6 @@ void __init tegra_init_apbmisc(void) strapping_base = of_iomap(np, 1); if (!strapping_base) pr_err("ioremap tegra strapping_base failed\n"); + + long_ram_code = of_property_read_bool(np, "nvidia,long-ram-code"); } diff --git a/include/soc/tegra/fuse.h b/include/soc/tegra/fuse.h index 8e12494..4ad6fd9 100644 --- a/include/soc/tegra/fuse.h +++ b/include/soc/tegra/fuse.h @@ -55,6 +55,7 @@ struct tegra_sku_info { }; u32 tegra_read_straps(void); +u32 tegra_read_ram_code(void); u32 tegra_read_chipid(void); int tegra_fuse_readl(unsigned long offset, u32 *value); -- 1.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/