[PATCH v2 2/8] clk: socfpga: move driver to subdirectory

[Steffen Trumtrar <s.trumtrar@pengutronix.de>]

Prepare for Arria10 clock driver.

Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
---
 drivers/clk/Makefile         |   2 +-
 drivers/clk/socfpga.c        | 434 +------------------------------------
 drivers/clk/socfpga/Makefile |   1 +-
 drivers/clk/socfpga/clk.c    | 434 ++++++++++++++++++++++++++++++++++++-
 4 files changed, 436 insertions(+), 435 deletions(-)
 delete mode 100644 drivers/clk/socfpga.c
 create mode 100644 drivers/clk/socfpga/Makefile
 create mode 100644 drivers/clk/socfpga/clk.c

diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index 5811d28b88ce..2a8c058d84e9 100644
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -8,6 +8,6 @@ obj-$(CONFIG_ARCH_MVEBU)	+= mvebu/
 obj-$(CONFIG_ARCH_MXS)		+= mxs/
 obj-$(CONFIG_ARCH_ROCKCHIP)	+= rockchip/
 obj-$(CONFIG_ARCH_TEGRA)	+= tegra/
-obj-$(CONFIG_CLK_SOCFPGA)	+= socfpga.o
+obj-$(CONFIG_CLK_SOCFPGA)	+= socfpga/
 obj-$(CONFIG_MACH_MIPS_ATH79)	+= clk-ar933x.o
 obj-$(CONFIG_ARCH_IMX)		+= imx/
diff --git a/drivers/clk/socfpga.c b/drivers/clk/socfpga.c
deleted file mode 100644
index 6af0632cafc2..000000000000
--- a/drivers/clk/socfpga.c
+++ /dev/null
@@ -1,434 +0,0 @@
-/*
- *  Copyright (C) 2013 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
-
-#include <common.h>
-#include <init.h>
-#include <driver.h>
-#include <linux/clk.h>
-#include <io.h>
-#include <malloc.h>
-#include <linux/clkdev.h>
-#include <linux/err.h>
-
-/* Clock Manager offsets */
-#define CLKMGR_CTRL	0x0
-#define CLKMGR_BYPASS	0x4
-#define CLKMGR_L4SRC	0x70
-#define CLKMGR_PERPLL_SRC	0xAC
-
-/* Clock bypass bits */
-#define MAINPLL_BYPASS		(1<<0)
-#define SDRAMPLL_BYPASS		(1<<1)
-#define SDRAMPLL_SRC_BYPASS	(1<<2)
-#define PERPLL_BYPASS		(1<<3)
-#define PERPLL_SRC_BYPASS	(1<<4)
-
-#define SOCFPGA_PLL_BG_PWRDWN		0
-#define SOCFPGA_PLL_EXT_ENA		1
-#define SOCFPGA_PLL_PWR_DOWN		2
-#define SOCFPGA_PLL_DIVF_MASK		0x0000FFF8
-#define SOCFPGA_PLL_DIVF_SHIFT	3
-#define SOCFPGA_PLL_DIVQ_MASK		0x003F0000
-#define SOCFPGA_PLL_DIVQ_SHIFT	16
-#define SOCFGPA_MAX_PARENTS	3
-
-#define SOCFPGA_L4_MP_CLK		"l4_mp_clk"
-#define SOCFPGA_L4_SP_CLK		"l4_sp_clk"
-#define SOCFPGA_NAND_CLK		"nand_clk"
-#define SOCFPGA_NAND_X_CLK		"nand_x_clk"
-#define SOCFPGA_MMC_CLK			"sdmmc_clk"
-#define SOCFPGA_DB_CLK			"gpio_db_clk"
-
-#define div_mask(width)	((1 << (width)) - 1)
-#define streq(a, b) (strcmp((a), (b)) == 0)
-
-static void __iomem *clk_mgr_base_addr;
-
-struct clk_pll {
-	struct clk clk;
-	const char *parent;
-	unsigned regofs;
-};
-
-static unsigned long clk_pll_recalc_rate(struct clk *clk,
-		unsigned long parent_rate)
-{
-	struct clk_pll *pll = container_of(clk, struct clk_pll, clk);
-	unsigned long divf, divq, vco_freq, reg;
-	unsigned long bypass;
-
-	reg = readl(clk_mgr_base_addr + pll->regofs);
-
-	bypass = readl(clk_mgr_base_addr + CLKMGR_BYPASS);
-	if (bypass & MAINPLL_BYPASS)
-		return parent_rate;
-
-	divf = (reg & SOCFPGA_PLL_DIVF_MASK) >> SOCFPGA_PLL_DIVF_SHIFT;
-	divq = (reg & SOCFPGA_PLL_DIVQ_MASK) >> SOCFPGA_PLL_DIVQ_SHIFT;
-	vco_freq = parent_rate * (divf + 1);
-
-	return vco_freq / (1 + divq);
-}
-
-static struct clk_ops clk_pll_ops = {
-	.recalc_rate = clk_pll_recalc_rate,
-};
-
-static struct clk *socfpga_pll_clk(struct device_node *node)
-{
-	struct clk_pll *pll;
-	int ret;
-
-	pll = xzalloc(sizeof(*pll));
-
-	pll->parent = of_clk_get_parent_name(node, 0);
-	if (!pll->parent)
-		return ERR_PTR(-EINVAL);
-
-	pll->clk.parent_names = &pll->parent;
-	pll->clk.num_parents = 1;
-	pll->clk.name = xstrdup(node->name);
-	pll->clk.ops = &clk_pll_ops;
-
-	of_property_read_u32(node, "reg", &pll->regofs);
-
-	ret = clk_register(&pll->clk);
-	if (ret) {
-		free(pll);
-		return ERR_PTR(ret);
-	}
-
-	return &pll->clk;
-}
-
-struct clk_periph {
-	struct clk clk;
-	const char *parent;
-	unsigned regofs;
-	unsigned int fixed_div;
-	void __iomem *div_reg;
-	unsigned int width;
-	unsigned int shift;
-};
-
-static unsigned long clk_periph_recalc_rate(struct clk *clk,
-		unsigned long parent_rate)
-{
-	struct clk_periph *periph = container_of(clk, struct clk_periph, clk);
-	u32 div, val;
-
-	if (periph->fixed_div) {
-		div = periph->fixed_div;
-	} else {
-		if (periph->div_reg) {
-			val = readl(periph->div_reg) >> periph->shift;
-			val &= div_mask(periph->width);
-			parent_rate /= (val + 1);
-		}
-		div = ((readl(clk_mgr_base_addr + periph->regofs) & 0x1ff) + 1);
-	}
-
-	return parent_rate / div;
-}
-
-static struct clk_ops clk_periph_ops = {
-	.recalc_rate = clk_periph_recalc_rate,
-};
-
-static struct clk *socfpga_periph_clk(struct device_node *node)
-{
-	struct clk_periph *periph;
-	int ret;
-	u32 div_reg[3];
-
-	periph = xzalloc(sizeof(*periph));
-
-	periph->parent = of_clk_get_parent_name(node, 0);
-	if (!periph->parent)
-		return ERR_PTR(-EINVAL);
-
-	periph->clk.parent_names = &periph->parent;
-	periph->clk.num_parents = 1;
-	periph->clk.name = xstrdup(node->name);
-	periph->clk.ops = &clk_periph_ops;
-
-	ret = of_property_read_u32_array(node, "div-reg", div_reg, 3);
-	if (!ret) {
-		periph->div_reg = clk_mgr_base_addr + div_reg[0];
-		periph->shift = div_reg[1];
-		periph->width = div_reg[2];
-	} else {
-		periph->div_reg = 0;
-	}
-
-	of_property_read_u32(node, "reg", &periph->regofs);
-	of_property_read_u32(node, "fixed-divider", &periph->fixed_div);
-
-	ret = clk_register(&periph->clk);
-	if (ret) {
-		free(periph);
-		return ERR_PTR(ret);
-	}
-
-	return &periph->clk;
-}
-
-struct clk_socfpga {
-	struct clk clk;
-	const char *parent;
-	void __iomem *reg;
-	void __iomem *div_reg;
-	unsigned int fixed_div;
-	unsigned int bit_idx;
-	unsigned int shift;
-	unsigned int width;
-	const char *parent_names[SOCFGPA_MAX_PARENTS];
-};
-
-static int clk_socfpga_enable(struct clk *clk)
-{
-	struct clk_socfpga *cs = container_of(clk, struct clk_socfpga, clk);
-	u32 val;
-
-	val = readl(cs->reg);
-	val |= 1 << cs->shift;
-	writel(val, cs->reg);
-
-	return 0;
-}
-
-static void clk_socfpga_disable(struct clk *clk)
-{
-	struct clk_socfpga *cs = container_of(clk, struct clk_socfpga, clk);
-	u32 val;
-
-	val = readl(cs->reg);
-	val &= ~(1 << cs->shift);
-	writel(val, cs->reg);
-}
-
-static int clk_socfpga_is_enabled(struct clk *clk)
-{
-	struct clk_socfpga *cs = container_of(clk, struct clk_socfpga, clk);
-	u32 val;
-
-	val = readl(cs->reg);
-
-	if (val & (1 << cs->shift))
-		return 1;
-	else
-		return 0;
-}
-
-static unsigned long clk_socfpga_recalc_rate(struct clk *clk,
-	unsigned long parent_rate)
-{
-	struct clk_socfpga *cs = container_of(clk, struct clk_socfpga, clk);
-	u32 div = 1, val;
-
-	if (cs->fixed_div) {
-		div = cs->fixed_div;
-	} else if (cs->div_reg) {
-		val = readl(cs->div_reg) >> cs->shift;
-		val &= div_mask(cs->width);
-		if (streq(clk->name, SOCFPGA_DB_CLK))
-			div = val + 1;
-		else
-			div = (1 << val);
-	}
-
-	return parent_rate / div;
-}
-
-static int clk_socfpga_get_parent(struct clk *clk)
-{
-	u32 perpll_src;
-	u32 l4_src;
-
-	if (streq(clk->name, SOCFPGA_L4_MP_CLK)) {
-		l4_src = readl(clk_mgr_base_addr + CLKMGR_L4SRC);
-		return l4_src &= 0x1;
-	}
-	if (streq(clk->name, SOCFPGA_L4_SP_CLK)) {
-		l4_src = readl(clk_mgr_base_addr + CLKMGR_L4SRC);
-		return !!(l4_src & 2);
-	}
-
-	perpll_src = readl(clk_mgr_base_addr + CLKMGR_PERPLL_SRC);
-	if (streq(clk->name, SOCFPGA_MMC_CLK))
-		return perpll_src &= 0x3;
-	if (streq(clk->name, SOCFPGA_NAND_CLK) ||
-	    streq(clk->name, SOCFPGA_NAND_X_CLK))
-		return (perpll_src >> 2) & 3;
-
-	/* QSPI clock */
-	return (perpll_src >> 4) & 3;
-}
-
-static int clk_socfpga_set_parent(struct clk *clk, u8 parent)
-{
-	u32 src_reg;
-
-	if (streq(clk->name, SOCFPGA_L4_MP_CLK)) {
-		src_reg = readl(clk_mgr_base_addr + CLKMGR_L4SRC);
-		src_reg &= ~0x1;
-		src_reg |= parent;
-		writel(src_reg, clk_mgr_base_addr + CLKMGR_L4SRC);
-	} else if (streq(clk->name, SOCFPGA_L4_SP_CLK)) {
-		src_reg = readl(clk_mgr_base_addr + CLKMGR_L4SRC);
-		src_reg &= ~0x2;
-		src_reg |= (parent << 1);
-		writel(src_reg, clk_mgr_base_addr + CLKMGR_L4SRC);
-	} else {
-		src_reg = readl(clk_mgr_base_addr + CLKMGR_PERPLL_SRC);
-		if (streq(clk->name, SOCFPGA_MMC_CLK)) {
-			src_reg &= ~0x3;
-			src_reg |= parent;
-		} else if (streq(clk->name, SOCFPGA_NAND_CLK) ||
-			streq(clk->name, SOCFPGA_NAND_X_CLK)) {
-			src_reg &= ~0xC;
-			src_reg |= (parent << 2);
-		} else {/* QSPI clock */
-			src_reg &= ~0x30;
-			src_reg |= (parent << 4);
-		}
-		writel(src_reg, clk_mgr_base_addr + CLKMGR_PERPLL_SRC);
-	}
-
-	return 0;
-}
-
-static struct clk_ops clk_socfpga_ops = {
-	.recalc_rate = clk_socfpga_recalc_rate,
-	.enable = clk_socfpga_enable,
-	.disable = clk_socfpga_disable,
-	.is_enabled = clk_socfpga_is_enabled,
-	.get_parent = clk_socfpga_get_parent,
-	.set_parent = clk_socfpga_set_parent,
-};
-
-static struct clk *socfpga_gate_clk(struct device_node *node)
-{
-	u32 clk_gate[2];
-	u32 div_reg[3];
-	u32 fixed_div;
-	struct clk_socfpga *cs;
-	int ret;
-	int i = 0;
-
-	cs = xzalloc(sizeof(*cs));
-
-	ret = of_property_read_u32_array(node, "clk-gate", clk_gate, 2);
-	if (ret)
-		clk_gate[0] = 0;
-
-	if (clk_gate[0]) {
-		cs->reg = clk_mgr_base_addr + clk_gate[0];
-		cs->bit_idx = clk_gate[1];
-	}
-
-	ret = of_property_read_u32(node, "fixed-divider", &fixed_div);
-	if (ret)
-		cs->fixed_div = 0;
-	else
-		cs->fixed_div = fixed_div;
-
-	ret = of_property_read_u32_array(node, "div-reg", div_reg, 3);
-	if (!ret) {
-		cs->div_reg = clk_mgr_base_addr + div_reg[0];
-		cs->shift = div_reg[1];
-		cs->width = div_reg[2];
-	}
-
-	for (i = 0; i < SOCFGPA_MAX_PARENTS; i++) {
-		cs->parent_names[i] = of_clk_get_parent_name(node, i);
-		if (!cs->parent_names[i])
-			break;
-	}
-
-	cs->clk.parent_names = cs->parent_names;
-	cs->clk.num_parents = i;
-	cs->clk.name = xstrdup(node->name);
-	cs->clk.ops = &clk_socfpga_ops;
-
-	ret = clk_register(&cs->clk);
-	if (ret) {
-		free(cs);
-		return ERR_PTR(ret);
-	}
-
-	return &cs->clk;
-}
-
-static void socfpga_register_clocks(struct device_d *dev, struct device_node *node)
-{
-	struct device_node *child;
-	struct clk *clk;
-
-	for_each_child_of_node(node, child) {
-		socfpga_register_clocks(dev, child);
-	}
-
-	if (of_device_is_compatible(node, "altr,socfpga-pll-clock"))
-		clk = socfpga_pll_clk(node);
-	else if (of_device_is_compatible(node, "altr,socfpga-perip-clk"))
-		clk = socfpga_periph_clk(node);
-	else if (of_device_is_compatible(node, "altr,socfpga-gate-clk"))
-		clk = socfpga_gate_clk(node);
-	else
-		return;
-
-	of_clk_add_provider(node, of_clk_src_simple_get, clk);
-}
-
-static int socfpga_ccm_probe(struct device_d *dev)
-{
-	struct resource *iores;
-	void __iomem *regs;
-	struct device_node *clknode;
-
-	iores = dev_request_mem_resource(dev, 0);
-	if (IS_ERR(iores))
-		return PTR_ERR(iores);
-	regs = IOMEM(iores->start);
-
-	clk_mgr_base_addr = regs;
-
-	clknode = of_get_child_by_name(dev->device_node, "clocks");
-	if (!clknode)
-		return -EINVAL;
-
-	socfpga_register_clocks(dev, clknode);
-
-	return 0;
-}
-
-static __maybe_unused struct of_device_id socfpga_ccm_dt_ids[] = {
-	{
-		.compatible = "altr,clk-mgr",
-	}, {
-		/* sentinel */
-	}
-};
-
-static struct driver_d socfpga_ccm_driver = {
-	.probe	= socfpga_ccm_probe,
-	.name	= "socfpga-ccm",
-	.of_compatible = DRV_OF_COMPAT(socfpga_ccm_dt_ids),
-};
-
-static int socfpga_ccm_init(void)
-{
-	return platform_driver_register(&socfpga_ccm_driver);
-}
-core_initcall(socfpga_ccm_init);
diff --git a/drivers/clk/socfpga/Makefile b/drivers/clk/socfpga/Makefile
new file mode 100644
index 000000000000..fc216adb744e
--- /dev/null
+++ b/drivers/clk/socfpga/Makefile
@@ -0,0 +1 @@
+obj-y	+= clk.o
diff --git a/drivers/clk/socfpga/clk.c b/drivers/clk/socfpga/clk.c
new file mode 100644
index 000000000000..6af0632cafc2
--- /dev/null
+++ b/drivers/clk/socfpga/clk.c
@@ -0,0 +1,434 @@
+/*
+ *  Copyright (C) 2013 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <common.h>
+#include <init.h>
+#include <driver.h>
+#include <linux/clk.h>
+#include <io.h>
+#include <malloc.h>
+#include <linux/clkdev.h>
+#include <linux/err.h>
+
+/* Clock Manager offsets */
+#define CLKMGR_CTRL	0x0
+#define CLKMGR_BYPASS	0x4
+#define CLKMGR_L4SRC	0x70
+#define CLKMGR_PERPLL_SRC	0xAC
+
+/* Clock bypass bits */
+#define MAINPLL_BYPASS		(1<<0)
+#define SDRAMPLL_BYPASS		(1<<1)
+#define SDRAMPLL_SRC_BYPASS	(1<<2)
+#define PERPLL_BYPASS		(1<<3)
+#define PERPLL_SRC_BYPASS	(1<<4)
+
+#define SOCFPGA_PLL_BG_PWRDWN		0
+#define SOCFPGA_PLL_EXT_ENA		1
+#define SOCFPGA_PLL_PWR_DOWN		2
+#define SOCFPGA_PLL_DIVF_MASK		0x0000FFF8
+#define SOCFPGA_PLL_DIVF_SHIFT	3
+#define SOCFPGA_PLL_DIVQ_MASK		0x003F0000
+#define SOCFPGA_PLL_DIVQ_SHIFT	16
+#define SOCFGPA_MAX_PARENTS	3
+
+#define SOCFPGA_L4_MP_CLK		"l4_mp_clk"
+#define SOCFPGA_L4_SP_CLK		"l4_sp_clk"
+#define SOCFPGA_NAND_CLK		"nand_clk"
+#define SOCFPGA_NAND_X_CLK		"nand_x_clk"
+#define SOCFPGA_MMC_CLK			"sdmmc_clk"
+#define SOCFPGA_DB_CLK			"gpio_db_clk"
+
+#define div_mask(width)	((1 << (width)) - 1)
+#define streq(a, b) (strcmp((a), (b)) == 0)
+
+static void __iomem *clk_mgr_base_addr;
+
+struct clk_pll {
+	struct clk clk;
+	const char *parent;
+	unsigned regofs;
+};
+
+static unsigned long clk_pll_recalc_rate(struct clk *clk,
+		unsigned long parent_rate)
+{
+	struct clk_pll *pll = container_of(clk, struct clk_pll, clk);
+	unsigned long divf, divq, vco_freq, reg;
+	unsigned long bypass;
+
+	reg = readl(clk_mgr_base_addr + pll->regofs);
+
+	bypass = readl(clk_mgr_base_addr + CLKMGR_BYPASS);
+	if (bypass & MAINPLL_BYPASS)
+		return parent_rate;
+
+	divf = (reg & SOCFPGA_PLL_DIVF_MASK) >> SOCFPGA_PLL_DIVF_SHIFT;
+	divq = (reg & SOCFPGA_PLL_DIVQ_MASK) >> SOCFPGA_PLL_DIVQ_SHIFT;
+	vco_freq = parent_rate * (divf + 1);
+
+	return vco_freq / (1 + divq);
+}
+
+static struct clk_ops clk_pll_ops = {
+	.recalc_rate = clk_pll_recalc_rate,
+};
+
+static struct clk *socfpga_pll_clk(struct device_node *node)
+{
+	struct clk_pll *pll;
+	int ret;
+
+	pll = xzalloc(sizeof(*pll));
+
+	pll->parent = of_clk_get_parent_name(node, 0);
+	if (!pll->parent)
+		return ERR_PTR(-EINVAL);
+
+	pll->clk.parent_names = &pll->parent;
+	pll->clk.num_parents = 1;
+	pll->clk.name = xstrdup(node->name);
+	pll->clk.ops = &clk_pll_ops;
+
+	of_property_read_u32(node, "reg", &pll->regofs);
+
+	ret = clk_register(&pll->clk);
+	if (ret) {
+		free(pll);
+		return ERR_PTR(ret);
+	}
+
+	return &pll->clk;
+}
+
+struct clk_periph {
+	struct clk clk;
+	const char *parent;
+	unsigned regofs;
+	unsigned int fixed_div;
+	void __iomem *div_reg;
+	unsigned int width;
+	unsigned int shift;
+};
+
+static unsigned long clk_periph_recalc_rate(struct clk *clk,
+		unsigned long parent_rate)
+{
+	struct clk_periph *periph = container_of(clk, struct clk_periph, clk);
+	u32 div, val;
+
+	if (periph->fixed_div) {
+		div = periph->fixed_div;
+	} else {
+		if (periph->div_reg) {
+			val = readl(periph->div_reg) >> periph->shift;
+			val &= div_mask(periph->width);
+			parent_rate /= (val + 1);
+		}
+		div = ((readl(clk_mgr_base_addr + periph->regofs) & 0x1ff) + 1);
+	}
+
+	return parent_rate / div;
+}
+
+static struct clk_ops clk_periph_ops = {
+	.recalc_rate = clk_periph_recalc_rate,
+};
+
+static struct clk *socfpga_periph_clk(struct device_node *node)
+{
+	struct clk_periph *periph;
+	int ret;
+	u32 div_reg[3];
+
+	periph = xzalloc(sizeof(*periph));
+
+	periph->parent = of_clk_get_parent_name(node, 0);
+	if (!periph->parent)
+		return ERR_PTR(-EINVAL);
+
+	periph->clk.parent_names = &periph->parent;
+	periph->clk.num_parents = 1;
+	periph->clk.name = xstrdup(node->name);
+	periph->clk.ops = &clk_periph_ops;
+
+	ret = of_property_read_u32_array(node, "div-reg", div_reg, 3);
+	if (!ret) {
+		periph->div_reg = clk_mgr_base_addr + div_reg[0];
+		periph->shift = div_reg[1];
+		periph->width = div_reg[2];
+	} else {
+		periph->div_reg = 0;
+	}
+
+	of_property_read_u32(node, "reg", &periph->regofs);
+	of_property_read_u32(node, "fixed-divider", &periph->fixed_div);
+
+	ret = clk_register(&periph->clk);
+	if (ret) {
+		free(periph);
+		return ERR_PTR(ret);
+	}
+
+	return &periph->clk;
+}
+
+struct clk_socfpga {
+	struct clk clk;
+	const char *parent;
+	void __iomem *reg;
+	void __iomem *div_reg;
+	unsigned int fixed_div;
+	unsigned int bit_idx;
+	unsigned int shift;
+	unsigned int width;
+	const char *parent_names[SOCFGPA_MAX_PARENTS];
+};
+
+static int clk_socfpga_enable(struct clk *clk)
+{
+	struct clk_socfpga *cs = container_of(clk, struct clk_socfpga, clk);
+	u32 val;
+
+	val = readl(cs->reg);
+	val |= 1 << cs->shift;
+	writel(val, cs->reg);
+
+	return 0;
+}
+
+static void clk_socfpga_disable(struct clk *clk)
+{
+	struct clk_socfpga *cs = container_of(clk, struct clk_socfpga, clk);
+	u32 val;
+
+	val = readl(cs->reg);
+	val &= ~(1 << cs->shift);
+	writel(val, cs->reg);
+}
+
+static int clk_socfpga_is_enabled(struct clk *clk)
+{
+	struct clk_socfpga *cs = container_of(clk, struct clk_socfpga, clk);
+	u32 val;
+
+	val = readl(cs->reg);
+
+	if (val & (1 << cs->shift))
+		return 1;
+	else
+		return 0;
+}
+
+static unsigned long clk_socfpga_recalc_rate(struct clk *clk,
+	unsigned long parent_rate)
+{
+	struct clk_socfpga *cs = container_of(clk, struct clk_socfpga, clk);
+	u32 div = 1, val;
+
+	if (cs->fixed_div) {
+		div = cs->fixed_div;
+	} else if (cs->div_reg) {
+		val = readl(cs->div_reg) >> cs->shift;
+		val &= div_mask(cs->width);
+		if (streq(clk->name, SOCFPGA_DB_CLK))
+			div = val + 1;
+		else
+			div = (1 << val);
+	}
+
+	return parent_rate / div;
+}
+
+static int clk_socfpga_get_parent(struct clk *clk)
+{
+	u32 perpll_src;
+	u32 l4_src;
+
+	if (streq(clk->name, SOCFPGA_L4_MP_CLK)) {
+		l4_src = readl(clk_mgr_base_addr + CLKMGR_L4SRC);
+		return l4_src &= 0x1;
+	}
+	if (streq(clk->name, SOCFPGA_L4_SP_CLK)) {
+		l4_src = readl(clk_mgr_base_addr + CLKMGR_L4SRC);
+		return !!(l4_src & 2);
+	}
+
+	perpll_src = readl(clk_mgr_base_addr + CLKMGR_PERPLL_SRC);
+	if (streq(clk->name, SOCFPGA_MMC_CLK))
+		return perpll_src &= 0x3;
+	if (streq(clk->name, SOCFPGA_NAND_CLK) ||
+	    streq(clk->name, SOCFPGA_NAND_X_CLK))
+		return (perpll_src >> 2) & 3;
+
+	/* QSPI clock */
+	return (perpll_src >> 4) & 3;
+}
+
+static int clk_socfpga_set_parent(struct clk *clk, u8 parent)
+{
+	u32 src_reg;
+
+	if (streq(clk->name, SOCFPGA_L4_MP_CLK)) {
+		src_reg = readl(clk_mgr_base_addr + CLKMGR_L4SRC);
+		src_reg &= ~0x1;
+		src_reg |= parent;
+		writel(src_reg, clk_mgr_base_addr + CLKMGR_L4SRC);
+	} else if (streq(clk->name, SOCFPGA_L4_SP_CLK)) {
+		src_reg = readl(clk_mgr_base_addr + CLKMGR_L4SRC);
+		src_reg &= ~0x2;
+		src_reg |= (parent << 1);
+		writel(src_reg, clk_mgr_base_addr + CLKMGR_L4SRC);
+	} else {
+		src_reg = readl(clk_mgr_base_addr + CLKMGR_PERPLL_SRC);
+		if (streq(clk->name, SOCFPGA_MMC_CLK)) {
+			src_reg &= ~0x3;
+			src_reg |= parent;
+		} else if (streq(clk->name, SOCFPGA_NAND_CLK) ||
+			streq(clk->name, SOCFPGA_NAND_X_CLK)) {
+			src_reg &= ~0xC;
+			src_reg |= (parent << 2);
+		} else {/* QSPI clock */
+			src_reg &= ~0x30;
+			src_reg |= (parent << 4);
+		}
+		writel(src_reg, clk_mgr_base_addr + CLKMGR_PERPLL_SRC);
+	}
+
+	return 0;
+}
+
+static struct clk_ops clk_socfpga_ops = {
+	.recalc_rate = clk_socfpga_recalc_rate,
+	.enable = clk_socfpga_enable,
+	.disable = clk_socfpga_disable,
+	.is_enabled = clk_socfpga_is_enabled,
+	.get_parent = clk_socfpga_get_parent,
+	.set_parent = clk_socfpga_set_parent,
+};
+
+static struct clk *socfpga_gate_clk(struct device_node *node)
+{
+	u32 clk_gate[2];
+	u32 div_reg[3];
+	u32 fixed_div;
+	struct clk_socfpga *cs;
+	int ret;
+	int i = 0;
+
+	cs = xzalloc(sizeof(*cs));
+
+	ret = of_property_read_u32_array(node, "clk-gate", clk_gate, 2);
+	if (ret)
+		clk_gate[0] = 0;
+
+	if (clk_gate[0]) {
+		cs->reg = clk_mgr_base_addr + clk_gate[0];
+		cs->bit_idx = clk_gate[1];
+	}
+
+	ret = of_property_read_u32(node, "fixed-divider", &fixed_div);
+	if (ret)
+		cs->fixed_div = 0;
+	else
+		cs->fixed_div = fixed_div;
+
+	ret = of_property_read_u32_array(node, "div-reg", div_reg, 3);
+	if (!ret) {
+		cs->div_reg = clk_mgr_base_addr + div_reg[0];
+		cs->shift = div_reg[1];
+		cs->width = div_reg[2];
+	}
+
+	for (i = 0; i < SOCFGPA_MAX_PARENTS; i++) {
+		cs->parent_names[i] = of_clk_get_parent_name(node, i);
+		if (!cs->parent_names[i])
+			break;
+	}
+
+	cs->clk.parent_names = cs->parent_names;
+	cs->clk.num_parents = i;
+	cs->clk.name = xstrdup(node->name);
+	cs->clk.ops = &clk_socfpga_ops;
+
+	ret = clk_register(&cs->clk);
+	if (ret) {
+		free(cs);
+		return ERR_PTR(ret);
+	}
+
+	return &cs->clk;
+}
+
+static void socfpga_register_clocks(struct device_d *dev, struct device_node *node)
+{
+	struct device_node *child;
+	struct clk *clk;
+
+	for_each_child_of_node(node, child) {
+		socfpga_register_clocks(dev, child);
+	}
+
+	if (of_device_is_compatible(node, "altr,socfpga-pll-clock"))
+		clk = socfpga_pll_clk(node);
+	else if (of_device_is_compatible(node, "altr,socfpga-perip-clk"))
+		clk = socfpga_periph_clk(node);
+	else if (of_device_is_compatible(node, "altr,socfpga-gate-clk"))
+		clk = socfpga_gate_clk(node);
+	else
+		return;
+
+	of_clk_add_provider(node, of_clk_src_simple_get, clk);
+}
+
+static int socfpga_ccm_probe(struct device_d *dev)
+{
+	struct resource *iores;
+	void __iomem *regs;
+	struct device_node *clknode;
+
+	iores = dev_request_mem_resource(dev, 0);
+	if (IS_ERR(iores))
+		return PTR_ERR(iores);
+	regs = IOMEM(iores->start);
+
+	clk_mgr_base_addr = regs;
+
+	clknode = of_get_child_by_name(dev->device_node, "clocks");
+	if (!clknode)
+		return -EINVAL;
+
+	socfpga_register_clocks(dev, clknode);
+
+	return 0;
+}
+
+static __maybe_unused struct of_device_id socfpga_ccm_dt_ids[] = {
+	{
+		.compatible = "altr,clk-mgr",
+	}, {
+		/* sentinel */
+	}
+};
+
+static struct driver_d socfpga_ccm_driver = {
+	.probe	= socfpga_ccm_probe,
+	.name	= "socfpga-ccm",
+	.of_compatible = DRV_OF_COMPAT(socfpga_ccm_dt_ids),
+};
+
+static int socfpga_ccm_init(void)
+{
+	return platform_driver_register(&socfpga_ccm_driver);
+}
+core_initcall(socfpga_ccm_init);
-- 
git-series 0.9.1

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