1 files changed, 50 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/pxa2xx.c b/arch/arm/mach-pxa/pxa2xx.c
new file mode 100644
index 0000000000..35c23a5d73
--- /dev/null
+++ b/arch/arm/mach-pxa/pxa2xx.c
@@ -0,0 +1,50 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * linux/arch/arm/mach-pxa/pxa2xx.c
+ *
+ * code specific to pxa2xx
+ *
+ * Copyright (C) 2008 Dmitry Baryshkov
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/io.h>
+
+#include "pxa2xx-regs.h"
+#include "mfp-pxa25x.h"
+#include "generic.h"
+#include "reset.h"
+#include "smemc.h"
+#include <linux/soc/pxa/smemc.h>
+
+void pxa2xx_clear_reset_status(unsigned int mask)
+{
+	/* RESET_STATUS_* has a 1:1 mapping with RCSR */
+	RCSR = mask;
+}
+
+#define MDCNFG_DRAC2(mdcnfg)	(((mdcnfg) >> 21) & 0x3)
+#define MDCNFG_DRAC0(mdcnfg)	(((mdcnfg) >> 5) & 0x3)
+
+int pxa2xx_smemc_get_sdram_rows(void)
+{
+	static int sdram_rows;
+	unsigned int drac2 = 0, drac0 = 0;
+	u32 mdcnfg;
+
+	if (sdram_rows)
+		return sdram_rows;
+
+	mdcnfg = readl_relaxed(MDCNFG);
+
+	if (mdcnfg & (MDCNFG_DE2 | MDCNFG_DE3))
+		drac2 = MDCNFG_DRAC2(mdcnfg);
+
+	if (mdcnfg & (MDCNFG_DE0 | MDCNFG_DE1))
+		drac0 = MDCNFG_DRAC0(mdcnfg);
+
+	sdram_rows = 1 << (11 + max(drac0, drac2));
+	return sdram_rows;
+}