ARM: OMAP4: remove dead kconfig option OMAP4_ERRATA_I688

The Kconfig-Option OMAP4_ERRATA_I688 is never visible due to a
contradiction in it's dependencies.
The option requires ARCH_MULTIPLATFORM to be 'disabled'. However, an
enclosing menu requires either ARCH_MULTI_V6 or ARCH_MULTI_V7 to be
enabled. These options inherit a dependency from an enclosing menu,
that requires ARCH_MULTIPLATFORM to be 'enabled'.
This is a contradiction and made this option also unavailable for
non-multiplatform configurations.

Since there are no selects on OMAP4_ERRATA_I688, which would ignore
dependencies, the code related to that option is dead and can be
removed.

This (logical) defect has been found with the undertaker tool.
(https://undertaker.cs.fau.de)

Signed-off-by: Stefan Hengelein <stefan.hengelein@fau.de>
Acked-by: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 0 insertions, 69 deletions

diff --git a/arch/arm/mach-omap2/omap4-common.c b/arch/arm/mach-omap2/omap4-common.c
index cee0fe1ee6ff..afaac9e25764 100644
--- a/arch/arm/mach-omap2/omap4-common.c
+++ b/arch/arm/mach-omap2/omap4-common.c
@@ -52,75 +52,6 @@ static void __iomem *twd_base;
 
 #define IRQ_LOCALTIMER          29
 
-#ifdef CONFIG_OMAP4_ERRATA_I688
-/* Used to implement memory barrier on DRAM path */
-#define OMAP4_DRAM_BARRIER_VA                   0xfe600000
-
-void __iomem *dram_sync, *sram_sync;
-
-static phys_addr_t paddr;
-static u32 size;
-
-void omap_bus_sync(void)
-{
-        if (dram_sync && sram_sync) {
-                writel_relaxed(readl_relaxed(dram_sync), dram_sync);
-                writel_relaxed(readl_relaxed(sram_sync), sram_sync);
-                isb();
-        }
-}
-EXPORT_SYMBOL(omap_bus_sync);
-
-static int __init omap4_sram_init(void)
-{
-        struct device_node *np;
-        struct gen_pool *sram_pool;
-
-        np = of_find_compatible_node(NULL, NULL, "ti,omap4-mpu");
-        if (!np)
-                pr_warn("%s:Unable to allocate sram needed to handle errata I688\n",
-                        __func__);
-        sram_pool = of_get_named_gen_pool(np, "sram", 0);
-        if (!sram_pool)
-                pr_warn("%s:Unable to get sram pool needed to handle errata I688\n",
-                        __func__);
-        else
-                sram_sync = (void *)gen_pool_alloc(sram_pool, PAGE_SIZE);
-
-        return 0;
-}
-omap_arch_initcall(omap4_sram_init);
-
-/* Steal one page physical memory for barrier implementation */
-int __init omap_barrier_reserve_memblock(void)
-{
-
-        size = ALIGN(PAGE_SIZE, SZ_1M);
-        paddr = arm_memblock_steal(size, SZ_1M);
-
-        return 0;
-}
-
-void __init omap_barriers_init(void)
-{
-        struct map_desc dram_io_desc[1];
-
-        dram_io_desc[0].virtual = OMAP4_DRAM_BARRIER_VA;
-        dram_io_desc[0].pfn = __phys_to_pfn(paddr);
-        dram_io_desc[0].length = size;
-        dram_io_desc[0].type = MT_MEMORY_RW_SO;
-        iotable_init(dram_io_desc, ARRAY_SIZE(dram_io_desc));
-        dram_sync = (void __iomem *) dram_io_desc[0].virtual;
-
-        pr_info("OMAP4: Map 0x%08llx to 0x%08lx for dram barrier\n",
-                (long long) paddr, dram_io_desc[0].virtual);
-
-}
-#else
-void __init omap_barriers_init(void)
-{}
-#endif
-
 void gic_dist_disable(void)
 {
         if (gic_dist_base_addr)