From 4a031f7dbe497a66cd18b33fc6e5ce2e889d89c7 Mon Sep 17 00:00:00 2001 From: Alexandre Belloni Date: Tue, 3 Mar 2015 08:38:07 +0100 Subject: [PATCH] ARM: at91: pm: fix SRAM allocation On some platforms, there are multiple SRAM nodes defined in the device tree but some of them are disabled, leading to allocation failure. Try to find the first enabled SRAM node and allocate from it. Signed-off-by: Alexandre Belloni Tested-by: Wenyou Yang Signed-off-by: Nicolas Ferre --- arch/arm/mach-at91/pm.c | 22 ++++++++++------------ 1 file changed, 10 insertions(+), 12 deletions(-) diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c index 5e34fb143309..aa4116e9452f 100644 --- a/arch/arm/mach-at91/pm.c +++ b/arch/arm/mach-at91/pm.c @@ -270,37 +270,35 @@ static void __init at91_pm_sram_init(void) phys_addr_t sram_pbase; unsigned long sram_base; struct device_node *node; - struct platform_device *pdev; + struct platform_device *pdev = NULL; - node = of_find_compatible_node(NULL, NULL, "mmio-sram"); - if (!node) { - pr_warn("%s: failed to find sram node!\n", __func__); - return; + for_each_compatible_node(node, NULL, "mmio-sram") { + pdev = of_find_device_by_node(node); + if (pdev) { + of_node_put(node); + break; + } } - pdev = of_find_device_by_node(node); if (!pdev) { pr_warn("%s: failed to find sram device!\n", __func__); - goto put_node; + return; } sram_pool = dev_get_gen_pool(&pdev->dev); if (!sram_pool) { pr_warn("%s: sram pool unavailable!\n", __func__); - goto put_node; + return; } sram_base = gen_pool_alloc(sram_pool, at91_slow_clock_sz); if (!sram_base) { pr_warn("%s: unable to alloc ocram!\n", __func__); - goto put_node; + return; } sram_pbase = gen_pool_virt_to_phys(sram_pool, sram_base); slow_clock = __arm_ioremap_exec(sram_pbase, at91_slow_clock_sz, false); - -put_node: - of_node_put(node); } #endif -- 2.39.5