Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933977AbaJUV4O (ORCPT ); Tue, 21 Oct 2014 17:56:14 -0400 Received: from down.free-electrons.com ([37.187.137.238]:52084 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S933908AbaJUV4L (ORCPT ); Tue, 21 Oct 2014 17:56:11 -0400 From: Alexandre Belloni To: Nicolas Ferre , Sebastian Reichel Cc: Jean-Christophe Plagniol-Villard , Dmitry Eremin-Solenikov , David Woodhouse , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, Alexandre Belloni Subject: [PATCH 5/8] power: reset: at91-reset: use at91_ramc_shutdown Date: Tue, 21 Oct 2014 23:55:37 +0200 Message-Id: <1413928540-27099-6-git-send-email-alexandre.belloni@free-electrons.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1413928540-27099-1-git-send-email-alexandre.belloni@free-electrons.com> References: <1413928540-27099-1-git-send-email-alexandre.belloni@free-electrons.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Now that all SoCs are registering the atmel-sdramc driver, use the at91_ramc_shutdown() function to shutdown the sdram. Signed-off-by: Alexandre Belloni --- drivers/power/reset/at91-reset.c | 116 +++++---------------------------------- 1 file changed, 14 insertions(+), 102 deletions(-) diff --git a/drivers/power/reset/at91-reset.c b/drivers/power/reset/at91-reset.c index 3cb36693343a..ec1ef9b113d4 100644 --- a/drivers/power/reset/at91-reset.c +++ b/drivers/power/reset/at91-reset.c @@ -19,8 +19,7 @@ #include -#include -#include +#include #define AT91_RSTC_CR 0x00 /* Reset Controller Control Register */ #define AT91_RSTC_PROCRST BIT(0) /* Processor Reset */ @@ -47,78 +46,28 @@ enum reset_type { RESET_TYPE_USER = 4, }; -static void __iomem *at91_ramc_base[2], *at91_rstc_base; +static void __iomem *at91_rstc_base; /* * unless the SDRAM is cleanly shutdown before we hit the * reset register it can be left driving the data bus and * killing the chance of a subsequent boot from NAND */ -static void at91sam9260_restart(enum reboot_mode mode, const char *cmd) +static void at91_restart(enum reboot_mode mode, const char *cmd) { - asm volatile( - /* Align to cache lines */ - ".balign 32\n\t" - - /* Disable SDRAM accesses */ - "str %2, [%0, #" __stringify(AT91_SDRAMC_TR) "]\n\t" - - /* Power down SDRAM */ - "str %3, [%0, #" __stringify(AT91_SDRAMC_LPR) "]\n\t" + if (at91_ramc_shutdown) + at91_ramc_shutdown(); + asm volatile( /* Reset CPU */ - "str %4, [%1, #" __stringify(AT91_RSTC_CR) "]\n\t" + "str %1, [%0, #" __stringify(AT91_RSTC_CR) "]\n\t" "b .\n\t" : - : "r" (at91_ramc_base[0]), - "r" (at91_rstc_base), - "r" (1), - "r" (AT91_SDRAMC_LPCB_POWER_DOWN), + : "r" (at91_rstc_base), "r" (AT91_RSTC_KEY | AT91_RSTC_PERRST | AT91_RSTC_PROCRST)); } -static void at91sam9g45_restart(enum reboot_mode mode, const char *cmd) -{ - asm volatile( - /* - * Test wether we have a second RAM controller to care - * about. - * - * First, test that we can dereference the virtual address. - */ - "cmp %1, #0\n\t" - "beq 1f\n\t" - - /* Then, test that the RAM controller is enabled */ - "ldr r0, [%1]\n\t" - "cmp r0, #0\n\t" - - /* Align to cache lines */ - ".balign 32\n\t" - - /* Disable SDRAM0 accesses */ - "1: str %3, [%0, #" __stringify(AT91_DDRSDRC_RTR) "]\n\t" - /* Power down SDRAM0 */ - " str %4, [%0, #" __stringify(AT91_DDRSDRC_LPR) "]\n\t" - /* Disable SDRAM1 accesses */ - " strne %3, [%1, #" __stringify(AT91_DDRSDRC_RTR) "]\n\t" - /* Power down SDRAM1 */ - " strne %4, [%1, #" __stringify(AT91_DDRSDRC_LPR) "]\n\t" - /* Reset CPU */ - " str %5, [%2, #" __stringify(AT91_RSTC_CR) "]\n\t" - - " b .\n\t" - : - : "r" (at91_ramc_base[0]), - "r" (at91_ramc_base[1]), - "r" (at91_rstc_base), - "r" (1), - "r" (AT91_DDRSDRC_LPCB_POWER_DOWN), - "r" (AT91_RSTC_KEY | AT91_RSTC_PERRST | AT91_RSTC_PROCRST) - : "r0"); -} - static void __init at91_reset_status(struct platform_device *pdev) { u32 reg = readl(at91_rstc_base + AT91_RSTC_SR); @@ -148,51 +97,27 @@ static void __init at91_reset_status(struct platform_device *pdev) pr_info("AT91: Starting after %s\n", reason); } -static struct of_device_id at91_ramc_of_match[] = { - { .compatible = "atmel,at91sam9260-sdramc", }, - { .compatible = "atmel,at91sam9g45-ddramc", }, - { .compatible = "atmel,sama5d3-ddramc", }, - { /* sentinel */ } -}; - static struct of_device_id at91_reset_of_match[] = { - { .compatible = "atmel,at91sam9260-rstc", .data = at91sam9260_restart }, - { .compatible = "atmel,at91sam9g45-rstc", .data = at91sam9g45_restart }, + { .compatible = "atmel,at91sam9260-rstc", }, + { .compatible = "atmel,at91sam9g45-rstc", }, { /* sentinel */ } }; static int at91_reset_of_probe(struct platform_device *pdev) { - const struct of_device_id *match; - struct device_node *np; - int idx = 0; - at91_rstc_base = of_iomap(pdev->dev.of_node, 0); if (!at91_rstc_base) { dev_err(&pdev->dev, "Could not map reset controller address\n"); return -ENODEV; } - for_each_matching_node(np, at91_ramc_of_match) { - at91_ramc_base[idx] = of_iomap(np, 0); - if (!at91_ramc_base[idx]) { - dev_err(&pdev->dev, "Could not map ram controller address\n"); - return -ENODEV; - } - idx++; - } - - match = of_match_node(at91_reset_of_match, pdev->dev.of_node); - arm_pm_restart = match->data; - return 0; } + static int at91_reset_platform_probe(struct platform_device *pdev) { - const struct platform_device_id *match; struct resource *res; - int idx = 0; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); at91_rstc_base = devm_ioremap_resource(&pdev->dev, res); @@ -201,20 +126,6 @@ static int at91_reset_platform_probe(struct platform_device *pdev) return PTR_ERR(at91_rstc_base); } - for (idx = 0; idx < 2; idx++) { - res = platform_get_resource(pdev, IORESOURCE_MEM, idx + 1 ); - at91_ramc_base[idx] = devm_ioremap(&pdev->dev, res->start, - resource_size(res)); - if (IS_ERR(at91_ramc_base[idx])) { - dev_err(&pdev->dev, "Could not map ram controller address\n"); - return PTR_ERR(at91_ramc_base[idx]); - } - } - - match = platform_get_device_id(pdev); - arm_pm_restart = (void (*)(enum reboot_mode, const char*)) - match->driver_data; - return 0; } @@ -230,14 +141,15 @@ static int at91_reset_probe(struct platform_device *pdev) if (ret) return ret; + arm_pm_restart = at91_restart; at91_reset_status(pdev); return 0; } static struct platform_device_id at91_reset_plat_match[] = { - { "at91-sam9260-reset", (unsigned long)at91sam9260_restart }, - { "at91-sam9g45-reset", (unsigned long)at91sam9g45_restart }, + { "at91-sam9260-reset", }, + { "at91-sam9g45-reset", }, { /* sentinel */ } }; -- 1.9.1 -- 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/