arch: kona: Initial commit of kona-common architecture code

The Kona architecture is present on a number of Broadcom mobile SoCs
including the bcm281xx family of chips.

Signed-off-by: Darwin Rambo <drambo@broadcom.com>
Reviewed-by: Steve Rae <srae@broadcom.com>
Reviewed-by: Tim Kryger <tkryger@linaro.org>

arch/arm/cpu/armv7/Makefile

@@ -23,6 +23,7 @@ obj-y	+= nonsec_virt.o
 obj-y	+= virt-v7.o
 endif
 
+obj-$(CONFIG_KONA) += kona-common/
 obj-$(CONFIG_OMAP_COMMON) += omap-common/
 obj-$(CONFIG_TEGRA) += tegra-common/
 

arch/arm/cpu/armv7/kona-common/Makefile

+#
+# Copyright 2013 Broadcom Corporation.
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y	+= s_init.o
+obj-y	+= hwinit-common.o
+obj-y	+= clk-stubs.o

arch/arm/cpu/armv7/kona-common/clk-stubs.c

+/*
+ * Copyright 2013 Broadcom Corporation.
+ *
+ * SPDX-License-Identifier:      GPL-2.0+
+ */
+
+#include <common.h>
+
+/*
+ * These weak functions are available to kona architectures that don't
+ * require clock enables from the driver code.
+ */
+int __weak clk_sdio_enable(void *base, u32 rate, u32 *actual_ratep)
+{
+	return 0;
+}
+
+int __weak clk_bsc_enable(void *base, u32 rate, u32 *actual_ratep)
+{
+	return 0;
+}

arch/arm/cpu/armv7/kona-common/hwinit-common.c

+/*
+ * Copyright 2013 Broadcom Corporation.
+ *
+ * SPDX-License-Identifier:      GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/sizes.h>
+
+#ifndef CONFIG_SYS_DCACHE_OFF
+void enable_caches(void)
+{
+	/* Enable D-cache. I-cache is already enabled in start.S */
+	dcache_enable();
+}
+#endif

arch/arm/cpu/armv7/kona-common/s_init.c

+/*
+ * Copyright 2014 Broadcom Corporation.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+/*
+ * Early system init. Currently empty.
+ */
+void s_init(void)
+{
+}

arch/arm/include/asm/kona-common/clk.h

+/*
+ * Copyright 2013 Broadcom Corporation.
+ *
+ * SPDX-License-Identifier:      GPL-2.0+
+ */
+
+/* This API file is loosely based on u-boot/drivers/video/ipu.h and linux */
+
+#ifndef __KONA_COMMON_CLK_H
+#define __KONA_COMMON_CLK_H
+
+#include <linux/types.h>
+
+struct clk;
+
+/* Only implement required functions for your specific architecture */
+int clk_init(void);
+struct clk *clk_get(const char *id);
+int clk_enable(struct clk *clk);
+void clk_disable(struct clk *clk);
+unsigned long clk_get_rate(struct clk *clk);
+long clk_round_rate(struct clk *clk, unsigned long rate);
+int clk_set_rate(struct clk *clk, unsigned long rate);
+int clk_set_parent(struct clk *clk, struct clk *parent);
+struct clk *clk_get_parent(struct clk *clk);
+int clk_sdio_enable(void *base, u32 rate, u32 *actual_ratep);
+int clk_bsc_enable(void *base);
+
+#endif

arch/arm/include/asm/kona-common/kona_sdhci.h

+/*
+ * Copyright 2013 Broadcom Corporation.
+ *
+ * SPDX-License-Identifier:      GPL-2.0+
+ */
+
+#ifndef __KONA_SDHCI_H
+#define __KONA_SDHCI_H
+
+int kona_sdhci_init(int dev_index, u32 min_clk, u32 quirks);
+
+#endif