Initial import

3 files changed, 867 insertions, 0 deletions

diff --git a/drivers/clk/zynq/Makefile b/drivers/clk/zynq/Makefile
new file mode 100644
index 000000000..156d923f4
--- /dev/null
+++ b/drivers/clk/zynq/Makefile
@@ -0,0 +1,3 @@
+# Zynq clock specific Makefile
+
+obj-$(CONFIG_ARCH_ZYNQ)	+= clkc.o pll.o
diff --git a/drivers/clk/zynq/clkc.c b/drivers/clk/zynq/clkc.c
new file mode 100644
index 000000000..40cb113be
--- /dev/null
+++ b/drivers/clk/zynq/clkc.c
@@ -0,0 +1,622 @@
+/*
+ * Zynq clock controller
+ *
+ *  Copyright (C) 2012 - 2013 Xilinx
+ *
+ *  Sören Brinkmann <soren.brinkmann@xilinx.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License v2 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/clk/zynq.h>
+#include <linux/clk-provider.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/io.h>
+
+static void __iomem *zynq_clkc_base;
+
+#define SLCR_ARMPLL_CTRL		(zynq_clkc_base + 0x00)
+#define SLCR_DDRPLL_CTRL		(zynq_clkc_base + 0x04)
+#define SLCR_IOPLL_CTRL			(zynq_clkc_base + 0x08)
+#define SLCR_PLL_STATUS			(zynq_clkc_base + 0x0c)
+#define SLCR_ARM_CLK_CTRL		(zynq_clkc_base + 0x20)
+#define SLCR_DDR_CLK_CTRL		(zynq_clkc_base + 0x24)
+#define SLCR_DCI_CLK_CTRL		(zynq_clkc_base + 0x28)
+#define SLCR_APER_CLK_CTRL		(zynq_clkc_base + 0x2c)
+#define SLCR_GEM0_CLK_CTRL		(zynq_clkc_base + 0x40)
+#define SLCR_GEM1_CLK_CTRL		(zynq_clkc_base + 0x44)
+#define SLCR_SMC_CLK_CTRL		(zynq_clkc_base + 0x48)
+#define SLCR_LQSPI_CLK_CTRL		(zynq_clkc_base + 0x4c)
+#define SLCR_SDIO_CLK_CTRL		(zynq_clkc_base + 0x50)
+#define SLCR_UART_CLK_CTRL		(zynq_clkc_base + 0x54)
+#define SLCR_SPI_CLK_CTRL		(zynq_clkc_base + 0x58)
+#define SLCR_CAN_CLK_CTRL		(zynq_clkc_base + 0x5c)
+#define SLCR_CAN_MIOCLK_CTRL		(zynq_clkc_base + 0x60)
+#define SLCR_DBG_CLK_CTRL		(zynq_clkc_base + 0x64)
+#define SLCR_PCAP_CLK_CTRL		(zynq_clkc_base + 0x68)
+#define SLCR_FPGA0_CLK_CTRL		(zynq_clkc_base + 0x70)
+#define SLCR_621_TRUE			(zynq_clkc_base + 0xc4)
+#define SLCR_SWDT_CLK_SEL		(zynq_clkc_base + 0x204)
+
+#define NUM_MIO_PINS	54
+
+#define DBG_CLK_CTRL_CLKACT_TRC		BIT(0)
+#define DBG_CLK_CTRL_CPU_1XCLKACT	BIT(1)
+
+enum zynq_clk {
+	armpll, ddrpll, iopll,
+	cpu_6or4x, cpu_3or2x, cpu_2x, cpu_1x,
+	ddr2x, ddr3x, dci,
+	lqspi, smc, pcap, gem0, gem1, fclk0, fclk1, fclk2, fclk3, can0, can1,
+	sdio0, sdio1, uart0, uart1, spi0, spi1, dma,
+	usb0_aper, usb1_aper, gem0_aper, gem1_aper,
+	sdio0_aper, sdio1_aper, spi0_aper, spi1_aper, can0_aper, can1_aper,
+	i2c0_aper, i2c1_aper, uart0_aper, uart1_aper, gpio_aper, lqspi_aper,
+	smc_aper, swdt, dbg_trc, dbg_apb, clk_max};
+
+static struct clk *ps_clk;
+static struct clk *clks[clk_max];
+static struct clk_onecell_data clk_data;
+
+static DEFINE_SPINLOCK(armpll_lock);
+static DEFINE_SPINLOCK(ddrpll_lock);
+static DEFINE_SPINLOCK(iopll_lock);
+static DEFINE_SPINLOCK(armclk_lock);
+static DEFINE_SPINLOCK(swdtclk_lock);
+static DEFINE_SPINLOCK(ddrclk_lock);
+static DEFINE_SPINLOCK(dciclk_lock);
+static DEFINE_SPINLOCK(gem0clk_lock);
+static DEFINE_SPINLOCK(gem1clk_lock);
+static DEFINE_SPINLOCK(canclk_lock);
+static DEFINE_SPINLOCK(canmioclk_lock);
+static DEFINE_SPINLOCK(dbgclk_lock);
+static DEFINE_SPINLOCK(aperclk_lock);
+
+static const char *armpll_parents[] __initdata = {"armpll_int", "ps_clk"};
+static const char *ddrpll_parents[] __initdata = {"ddrpll_int", "ps_clk"};
+static const char *iopll_parents[] __initdata = {"iopll_int", "ps_clk"};
+static const char *gem0_mux_parents[] __initdata = {"gem0_div1", "dummy_name"};
+static const char *gem1_mux_parents[] __initdata = {"gem1_div1", "dummy_name"};
+static const char *can0_mio_mux2_parents[] __initdata = {"can0_gate",
+	"can0_mio_mux"};
+static const char *can1_mio_mux2_parents[] __initdata = {"can1_gate",
+	"can1_mio_mux"};
+static const char *dbg_emio_mux_parents[] __initdata = {"dbg_div",
+	"dummy_name"};
+
+static const char *dbgtrc_emio_input_names[] __initdata = {"trace_emio_clk"};
+static const char *gem0_emio_input_names[] __initdata = {"gem0_emio_clk"};
+static const char *gem1_emio_input_names[] __initdata = {"gem1_emio_clk"};
+static const char *swdt_ext_clk_input_names[] __initdata = {"swdt_ext_clk"};
+
+static void __init zynq_clk_register_fclk(enum zynq_clk fclk,
+		const char *clk_name, void __iomem *fclk_ctrl_reg,
+		const char **parents, int enable)
+{
+	struct clk *clk;
+	u32 enable_reg;
+	char *mux_name;
+	char *div0_name;
+	char *div1_name;
+	spinlock_t *fclk_lock;
+	spinlock_t *fclk_gate_lock;
+	void __iomem *fclk_gate_reg = fclk_ctrl_reg + 8;
+
+	fclk_lock = kmalloc(sizeof(*fclk_lock), GFP_KERNEL);
+	if (!fclk_lock)
+		goto err;
+	fclk_gate_lock = kmalloc(sizeof(*fclk_gate_lock), GFP_KERNEL);
+	if (!fclk_gate_lock)
+		goto err_fclk_gate_lock;
+	spin_lock_init(fclk_lock);
+	spin_lock_init(fclk_gate_lock);
+
+	mux_name = kasprintf(GFP_KERNEL, "%s_mux", clk_name);
+	if (!mux_name)
+		goto err_mux_name;
+	div0_name = kasprintf(GFP_KERNEL, "%s_div0", clk_name);
+	if (!div0_name)
+		goto err_div0_name;
+	div1_name = kasprintf(GFP_KERNEL, "%s_div1", clk_name);
+	if (!div1_name)
+		goto err_div1_name;
+
+	clk = clk_register_mux(NULL, mux_name, parents, 4,
+			CLK_SET_RATE_NO_REPARENT, fclk_ctrl_reg, 4, 2, 0,
+			fclk_lock);
+
+	clk = clk_register_divider(NULL, div0_name, mux_name,
+			0, fclk_ctrl_reg, 8, 6, CLK_DIVIDER_ONE_BASED |
+			CLK_DIVIDER_ALLOW_ZERO, fclk_lock);
+
+	clk = clk_register_divider(NULL, div1_name, div0_name,
+			CLK_SET_RATE_PARENT, fclk_ctrl_reg, 20, 6,
+			CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO,
+			fclk_lock);
+
+	clks[fclk] = clk_register_gate(NULL, clk_name,
+			div1_name, CLK_SET_RATE_PARENT, fclk_gate_reg,
+			0, CLK_GATE_SET_TO_DISABLE, fclk_gate_lock);
+	enable_reg = clk_readl(fclk_gate_reg) & 1;
+	if (enable && !enable_reg) {
+		if (clk_prepare_enable(clks[fclk]))
+			pr_warn("%s: FCLK%u enable failed\n", __func__,
+					fclk - fclk0);
+	}
+	kfree(mux_name);
+	kfree(div0_name);
+	kfree(div1_name);
+
+	return;
+
+err_div1_name:
+	kfree(div0_name);
+err_div0_name:
+	kfree(mux_name);
+err_mux_name:
+	kfree(fclk_gate_lock);
+err_fclk_gate_lock:
+	kfree(fclk_lock);
+err:
+	clks[fclk] = ERR_PTR(-ENOMEM);
+}
+
+static void __init zynq_clk_register_periph_clk(enum zynq_clk clk0,
+		enum zynq_clk clk1, const char *clk_name0,
+		const char *clk_name1, void __iomem *clk_ctrl,
+		const char **parents, unsigned int two_gates)
+{
+	struct clk *clk;
+	char *mux_name;
+	char *div_name;
+	spinlock_t *lock;
+
+	lock = kmalloc(sizeof(*lock), GFP_KERNEL);
+	if (!lock)
+		goto err;
+	spin_lock_init(lock);
+
+	mux_name = kasprintf(GFP_KERNEL, "%s_mux", clk_name0);
+	div_name = kasprintf(GFP_KERNEL, "%s_div", clk_name0);
+
+	clk = clk_register_mux(NULL, mux_name, parents, 4,
+			CLK_SET_RATE_NO_REPARENT, clk_ctrl, 4, 2, 0, lock);
+
+	clk = clk_register_divider(NULL, div_name, mux_name, 0, clk_ctrl, 8, 6,
+			CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO, lock);
+
+	clks[clk0] = clk_register_gate(NULL, clk_name0, div_name,
+			CLK_SET_RATE_PARENT, clk_ctrl, 0, 0, lock);
+	if (two_gates)
+		clks[clk1] = clk_register_gate(NULL, clk_name1, div_name,
+				CLK_SET_RATE_PARENT, clk_ctrl, 1, 0, lock);
+
+	kfree(mux_name);
+	kfree(div_name);
+
+	return;
+
+err:
+	clks[clk0] = ERR_PTR(-ENOMEM);
+	if (two_gates)
+		clks[clk1] = ERR_PTR(-ENOMEM);
+}
+
+static void __init zynq_clk_setup(struct device_node *np)
+{
+	int i;
+	u32 tmp;
+	int ret;
+	struct clk *clk;
+	char *clk_name;
+	unsigned int fclk_enable = 0;
+	const char *clk_output_name[clk_max];
+	const char *cpu_parents[4];
+	const char *periph_parents[4];
+	const char *swdt_ext_clk_mux_parents[2];
+	const char *can_mio_mux_parents[NUM_MIO_PINS];
+	const char *dummy_nm = "dummy_name";
+
+	pr_info("Zynq clock init\n");
+
+	/* get clock output names from DT */
+	for (i = 0; i < clk_max; i++) {
+		if (of_property_read_string_index(np, "clock-output-names",
+				  i, &clk_output_name[i])) {
+			pr_err("%s: clock output name not in DT\n", __func__);
+			BUG();
+		}
+	}
+	cpu_parents[0] = clk_output_name[armpll];
+	cpu_parents[1] = clk_output_name[armpll];
+	cpu_parents[2] = clk_output_name[ddrpll];
+	cpu_parents[3] = clk_output_name[iopll];
+	periph_parents[0] = clk_output_name[iopll];
+	periph_parents[1] = clk_output_name[iopll];
+	periph_parents[2] = clk_output_name[armpll];
+	periph_parents[3] = clk_output_name[ddrpll];
+
+	of_property_read_u32(np, "fclk-enable", &fclk_enable);
+
+	/* ps_clk */
+	ret = of_property_read_u32(np, "ps-clk-frequency", &tmp);
+	if (ret) {
+		pr_warn("ps_clk frequency not specified, using 33 MHz.\n");
+		tmp = 33333333;
+	}
+	ps_clk = clk_register_fixed_rate(NULL, "ps_clk", NULL, CLK_IS_ROOT,
+			tmp);
+
+	/* PLLs */
+	clk = clk_register_zynq_pll("armpll_int", "ps_clk", SLCR_ARMPLL_CTRL,
+			SLCR_PLL_STATUS, 0, &armpll_lock);
+	clks[armpll] = clk_register_mux(NULL, clk_output_name[armpll],
+			armpll_parents, 2, CLK_SET_RATE_NO_REPARENT,
+			SLCR_ARMPLL_CTRL, 4, 1, 0, &armpll_lock);
+
+	clk = clk_register_zynq_pll("ddrpll_int", "ps_clk", SLCR_DDRPLL_CTRL,
+			SLCR_PLL_STATUS, 1, &ddrpll_lock);
+	clks[ddrpll] = clk_register_mux(NULL, clk_output_name[ddrpll],
+			ddrpll_parents, 2, CLK_SET_RATE_NO_REPARENT,
+			SLCR_DDRPLL_CTRL, 4, 1, 0, &ddrpll_lock);
+
+	clk = clk_register_zynq_pll("iopll_int", "ps_clk", SLCR_IOPLL_CTRL,
+			SLCR_PLL_STATUS, 2, &iopll_lock);
+	clks[iopll] = clk_register_mux(NULL, clk_output_name[iopll],
+			iopll_parents, 2, CLK_SET_RATE_NO_REPARENT,
+			SLCR_IOPLL_CTRL, 4, 1, 0, &iopll_lock);
+
+	/* CPU clocks */
+	tmp = clk_readl(SLCR_621_TRUE) & 1;
+	clk = clk_register_mux(NULL, "cpu_mux", cpu_parents, 4,
+			CLK_SET_RATE_NO_REPARENT, SLCR_ARM_CLK_CTRL, 4, 2, 0,
+			&armclk_lock);
+	clk = clk_register_divider(NULL, "cpu_div", "cpu_mux", 0,
+			SLCR_ARM_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED |
+			CLK_DIVIDER_ALLOW_ZERO, &armclk_lock);
+
+	clks[cpu_6or4x] = clk_register_gate(NULL, clk_output_name[cpu_6or4x],
+			"cpu_div", CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED,
+			SLCR_ARM_CLK_CTRL, 24, 0, &armclk_lock);
+
+	clk = clk_register_fixed_factor(NULL, "cpu_3or2x_div", "cpu_div", 0,
+			1, 2);
+	clks[cpu_3or2x] = clk_register_gate(NULL, clk_output_name[cpu_3or2x],
+			"cpu_3or2x_div", CLK_IGNORE_UNUSED,
+			SLCR_ARM_CLK_CTRL, 25, 0, &armclk_lock);
+
+	clk = clk_register_fixed_factor(NULL, "cpu_2x_div", "cpu_div", 0, 1,
+			2 + tmp);
+	clks[cpu_2x] = clk_register_gate(NULL, clk_output_name[cpu_2x],
+			"cpu_2x_div", CLK_IGNORE_UNUSED, SLCR_ARM_CLK_CTRL,
+			26, 0, &armclk_lock);
+	clk_prepare_enable(clks[cpu_2x]);
+
+	clk = clk_register_fixed_factor(NULL, "cpu_1x_div", "cpu_div", 0, 1,
+			4 + 2 * tmp);
+	clks[cpu_1x] = clk_register_gate(NULL, clk_output_name[cpu_1x],
+			"cpu_1x_div", CLK_IGNORE_UNUSED, SLCR_ARM_CLK_CTRL, 27,
+			0, &armclk_lock);
+
+	/* Timers */
+	swdt_ext_clk_mux_parents[0] = clk_output_name[cpu_1x];
+	for (i = 0; i < ARRAY_SIZE(swdt_ext_clk_input_names); i++) {
+		int idx = of_property_match_string(np, "clock-names",
+				swdt_ext_clk_input_names[i]);
+		if (idx >= 0)
+			swdt_ext_clk_mux_parents[i + 1] =
+				of_clk_get_parent_name(np, idx);
+		else
+			swdt_ext_clk_mux_parents[i + 1] = dummy_nm;
+	}
+	clks[swdt] = clk_register_mux(NULL, clk_output_name[swdt],
+			swdt_ext_clk_mux_parents, 2, CLK_SET_RATE_PARENT |
+			CLK_SET_RATE_NO_REPARENT, SLCR_SWDT_CLK_SEL, 0, 1, 0,
+			&swdtclk_lock);
+
+	/* DDR clocks */
+	clk = clk_register_divider(NULL, "ddr2x_div", "ddrpll", 0,
+			SLCR_DDR_CLK_CTRL, 26, 6, CLK_DIVIDER_ONE_BASED |
+			CLK_DIVIDER_ALLOW_ZERO, &ddrclk_lock);
+	clks[ddr2x] = clk_register_gate(NULL, clk_output_name[ddr2x],
+			"ddr2x_div", 0, SLCR_DDR_CLK_CTRL, 1, 0, &ddrclk_lock);
+	clk_prepare_enable(clks[ddr2x]);
+	clk = clk_register_divider(NULL, "ddr3x_div", "ddrpll", 0,
+			SLCR_DDR_CLK_CTRL, 20, 6, CLK_DIVIDER_ONE_BASED |
+			CLK_DIVIDER_ALLOW_ZERO, &ddrclk_lock);
+	clks[ddr3x] = clk_register_gate(NULL, clk_output_name[ddr3x],
+			"ddr3x_div", 0, SLCR_DDR_CLK_CTRL, 0, 0, &ddrclk_lock);
+	clk_prepare_enable(clks[ddr3x]);
+
+	clk = clk_register_divider(NULL, "dci_div0", "ddrpll", 0,
+			SLCR_DCI_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED |
+			CLK_DIVIDER_ALLOW_ZERO, &dciclk_lock);
+	clk = clk_register_divider(NULL, "dci_div1", "dci_div0",
+			CLK_SET_RATE_PARENT, SLCR_DCI_CLK_CTRL, 20, 6,
+			CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO,
+			&dciclk_lock);
+	clks[dci] = clk_register_gate(NULL, clk_output_name[dci], "dci_div1",
+			CLK_SET_RATE_PARENT, SLCR_DCI_CLK_CTRL, 0, 0,
+			&dciclk_lock);
+	clk_prepare_enable(clks[dci]);
+
+	/* Peripheral clocks */
+	for (i = fclk0; i <= fclk3; i++) {
+		int enable = !!(fclk_enable & BIT(i - fclk0));
+		zynq_clk_register_fclk(i, clk_output_name[i],
+				SLCR_FPGA0_CLK_CTRL + 0x10 * (i - fclk0),
+				periph_parents, enable);
+	}
+
+	zynq_clk_register_periph_clk(lqspi, 0, clk_output_name[lqspi], NULL,
+			SLCR_LQSPI_CLK_CTRL, periph_parents, 0);
+
+	zynq_clk_register_periph_clk(smc, 0, clk_output_name[smc], NULL,
+			SLCR_SMC_CLK_CTRL, periph_parents, 0);
+
+	zynq_clk_register_periph_clk(pcap, 0, clk_output_name[pcap], NULL,
+			SLCR_PCAP_CLK_CTRL, periph_parents, 0);
+
+	zynq_clk_register_periph_clk(sdio0, sdio1, clk_output_name[sdio0],
+			clk_output_name[sdio1], SLCR_SDIO_CLK_CTRL,
+			periph_parents, 1);
+
+	zynq_clk_register_periph_clk(uart0, uart1, clk_output_name[uart0],
+			clk_output_name[uart1], SLCR_UART_CLK_CTRL,
+			periph_parents, 1);
+
+	zynq_clk_register_periph_clk(spi0, spi1, clk_output_name[spi0],
+			clk_output_name[spi1], SLCR_SPI_CLK_CTRL,
+			periph_parents, 1);
+
+	for (i = 0; i < ARRAY_SIZE(gem0_emio_input_names); i++) {
+		int idx = of_property_match_string(np, "clock-names",
+				gem0_emio_input_names[i]);
+		if (idx >= 0)
+			gem0_mux_parents[i + 1] = of_clk_get_parent_name(np,
+					idx);
+	}
+	clk = clk_register_mux(NULL, "gem0_mux", periph_parents, 4,
+			CLK_SET_RATE_NO_REPARENT, SLCR_GEM0_CLK_CTRL, 4, 2, 0,
+			&gem0clk_lock);
+	clk = clk_register_divider(NULL, "gem0_div0", "gem0_mux", 0,
+			SLCR_GEM0_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED |
+			CLK_DIVIDER_ALLOW_ZERO, &gem0clk_lock);
+	clk = clk_register_divider(NULL, "gem0_div1", "gem0_div0",
+			CLK_SET_RATE_PARENT, SLCR_GEM0_CLK_CTRL, 20, 6,
+			CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO,
+			&gem0clk_lock);
+	clk = clk_register_mux(NULL, "gem0_emio_mux", gem0_mux_parents, 2,
+			CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT,
+			SLCR_GEM0_CLK_CTRL, 6, 1, 0,
+			&gem0clk_lock);
+	clks[gem0] = clk_register_gate(NULL, clk_output_name[gem0],
+			"gem0_emio_mux", CLK_SET_RATE_PARENT,
+			SLCR_GEM0_CLK_CTRL, 0, 0, &gem0clk_lock);
+
+	for (i = 0; i < ARRAY_SIZE(gem1_emio_input_names); i++) {
+		int idx = of_property_match_string(np, "clock-names",
+				gem1_emio_input_names[i]);
+		if (idx >= 0)
+			gem1_mux_parents[i + 1] = of_clk_get_parent_name(np,
+					idx);
+	}
+	clk = clk_register_mux(NULL, "gem1_mux", periph_parents, 4,
+			CLK_SET_RATE_NO_REPARENT, SLCR_GEM1_CLK_CTRL, 4, 2, 0,
+			&gem1clk_lock);
+	clk = clk_register_divider(NULL, "gem1_div0", "gem1_mux", 0,
+			SLCR_GEM1_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED |
+			CLK_DIVIDER_ALLOW_ZERO, &gem1clk_lock);
+	clk = clk_register_divider(NULL, "gem1_div1", "gem1_div0",
+			CLK_SET_RATE_PARENT, SLCR_GEM1_CLK_CTRL, 20, 6,
+			CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO,
+			&gem1clk_lock);
+	clk = clk_register_mux(NULL, "gem1_emio_mux", gem1_mux_parents, 2,
+			CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT,
+			SLCR_GEM1_CLK_CTRL, 6, 1, 0,
+			&gem1clk_lock);
+	clks[gem1] = clk_register_gate(NULL, clk_output_name[gem1],
+			"gem1_emio_mux", CLK_SET_RATE_PARENT,
+			SLCR_GEM1_CLK_CTRL, 0, 0, &gem1clk_lock);
+
+	tmp = strlen("mio_clk_00x");
+	clk_name = kmalloc(tmp, GFP_KERNEL);
+	for (i = 0; i < NUM_MIO_PINS; i++) {
+		int idx;
+
+		snprintf(clk_name, tmp, "mio_clk_%2.2d", i);
+		idx = of_property_match_string(np, "clock-names", clk_name);
+		if (idx >= 0)
+			can_mio_mux_parents[i] = of_clk_get_parent_name(np,
+						idx);
+		else
+			can_mio_mux_parents[i] = dummy_nm;
+	}
+	kfree(clk_name);
+	clk = clk_register_mux(NULL, "can_mux", periph_parents, 4,
+			CLK_SET_RATE_NO_REPARENT, SLCR_CAN_CLK_CTRL, 4, 2, 0,
+			&canclk_lock);
+	clk = clk_register_divider(NULL, "can_div0", "can_mux", 0,
+			SLCR_CAN_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED |
+			CLK_DIVIDER_ALLOW_ZERO, &canclk_lock);
+	clk = clk_register_divider(NULL, "can_div1", "can_div0",
+			CLK_SET_RATE_PARENT, SLCR_CAN_CLK_CTRL, 20, 6,
+			CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO,
+			&canclk_lock);
+	clk = clk_register_gate(NULL, "can0_gate", "can_div1",
+			CLK_SET_RATE_PARENT, SLCR_CAN_CLK_CTRL, 0, 0,
+			&canclk_lock);
+	clk = clk_register_gate(NULL, "can1_gate", "can_div1",
+			CLK_SET_RATE_PARENT, SLCR_CAN_CLK_CTRL, 1, 0,
+			&canclk_lock);
+	clk = clk_register_mux(NULL, "can0_mio_mux",
+			can_mio_mux_parents, 54, CLK_SET_RATE_PARENT |
+			CLK_SET_RATE_NO_REPARENT, SLCR_CAN_MIOCLK_CTRL, 0, 6, 0,
+			&canmioclk_lock);
+	clk = clk_register_mux(NULL, "can1_mio_mux",
+			can_mio_mux_parents, 54, CLK_SET_RATE_PARENT |
+			CLK_SET_RATE_NO_REPARENT, SLCR_CAN_MIOCLK_CTRL, 16, 6,
+			0, &canmioclk_lock);
+	clks[can0] = clk_register_mux(NULL, clk_output_name[can0],
+			can0_mio_mux2_parents, 2, CLK_SET_RATE_PARENT |
+			CLK_SET_RATE_NO_REPARENT, SLCR_CAN_MIOCLK_CTRL, 6, 1, 0,
+			&canmioclk_lock);
+	clks[can1] = clk_register_mux(NULL, clk_output_name[can1],
+			can1_mio_mux2_parents, 2, CLK_SET_RATE_PARENT |
+			CLK_SET_RATE_NO_REPARENT, SLCR_CAN_MIOCLK_CTRL, 22, 1,
+			0, &canmioclk_lock);
+
+	for (i = 0; i < ARRAY_SIZE(dbgtrc_emio_input_names); i++) {
+		int idx = of_property_match_string(np, "clock-names",
+				dbgtrc_emio_input_names[i]);
+		if (idx >= 0)
+			dbg_emio_mux_parents[i + 1] = of_clk_get_parent_name(np,
+					idx);
+	}
+	clk = clk_register_mux(NULL, "dbg_mux", periph_parents, 4,
+			CLK_SET_RATE_NO_REPARENT, SLCR_DBG_CLK_CTRL, 4, 2, 0,
+			&dbgclk_lock);
+	clk = clk_register_divider(NULL, "dbg_div", "dbg_mux", 0,
+			SLCR_DBG_CLK_CTRL, 8, 6, CLK_DIVIDER_ONE_BASED |
+			CLK_DIVIDER_ALLOW_ZERO, &dbgclk_lock);
+	clk = clk_register_mux(NULL, "dbg_emio_mux", dbg_emio_mux_parents, 2,
+			CLK_SET_RATE_NO_REPARENT, SLCR_DBG_CLK_CTRL, 6, 1, 0,
+			&dbgclk_lock);
+	clks[dbg_trc] = clk_register_gate(NULL, clk_output_name[dbg_trc],
+			"dbg_emio_mux", CLK_SET_RATE_PARENT, SLCR_DBG_CLK_CTRL,
+			0, 0, &dbgclk_lock);
+	clks[dbg_apb] = clk_register_gate(NULL, clk_output_name[dbg_apb],
+			clk_output_name[cpu_1x], 0, SLCR_DBG_CLK_CTRL, 1, 0,
+			&dbgclk_lock);
+
+	/* leave debug clocks in the state the bootloader set them up to */
+	tmp = clk_readl(SLCR_DBG_CLK_CTRL);
+	if (tmp & DBG_CLK_CTRL_CLKACT_TRC)
+		if (clk_prepare_enable(clks[dbg_trc]))
+			pr_warn("%s: trace clk enable failed\n", __func__);
+	if (tmp & DBG_CLK_CTRL_CPU_1XCLKACT)
+		if (clk_prepare_enable(clks[dbg_apb]))
+			pr_warn("%s: debug APB clk enable failed\n", __func__);
+
+	/* One gated clock for all APER clocks. */
+	clks[dma] = clk_register_gate(NULL, clk_output_name[dma],
+			clk_output_name[cpu_2x], 0, SLCR_APER_CLK_CTRL, 0, 0,
+			&aperclk_lock);
+	clks[usb0_aper] = clk_register_gate(NULL, clk_output_name[usb0_aper],
+			clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 2, 0,
+			&aperclk_lock);
+	clks[usb1_aper] = clk_register_gate(NULL, clk_output_name[usb1_aper],
+			clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 3, 0,
+			&aperclk_lock);
+	clks[gem0_aper] = clk_register_gate(NULL, clk_output_name[gem0_aper],
+			clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 6, 0,
+			&aperclk_lock);
+	clks[gem1_aper] = clk_register_gate(NULL, clk_output_name[gem1_aper],
+			clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 7, 0,
+			&aperclk_lock);
+	clks[sdio0_aper] = clk_register_gate(NULL, clk_output_name[sdio0_aper],
+			clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 10, 0,
+			&aperclk_lock);
+	clks[sdio1_aper] = clk_register_gate(NULL, clk_output_name[sdio1_aper],
+			clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 11, 0,
+			&aperclk_lock);
+	clks[spi0_aper] = clk_register_gate(NULL, clk_output_name[spi0_aper],
+			clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 14, 0,
+			&aperclk_lock);
+	clks[spi1_aper] = clk_register_gate(NULL, clk_output_name[spi1_aper],
+			clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 15, 0,
+			&aperclk_lock);
+	clks[can0_aper] = clk_register_gate(NULL, clk_output_name[can0_aper],
+			clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 16, 0,
+			&aperclk_lock);
+	clks[can1_aper] = clk_register_gate(NULL, clk_output_name[can1_aper],
+			clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 17, 0,
+			&aperclk_lock);
+	clks[i2c0_aper] = clk_register_gate(NULL, clk_output_name[i2c0_aper],
+			clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 18, 0,
+			&aperclk_lock);
+	clks[i2c1_aper] = clk_register_gate(NULL, clk_output_name[i2c1_aper],
+			clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 19, 0,
+			&aperclk_lock);
+	clks[uart0_aper] = clk_register_gate(NULL, clk_output_name[uart0_aper],
+			clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 20, 0,
+			&aperclk_lock);
+	clks[uart1_aper] = clk_register_gate(NULL, clk_output_name[uart1_aper],
+			clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 21, 0,
+			&aperclk_lock);
+	clks[gpio_aper] = clk_register_gate(NULL, clk_output_name[gpio_aper],
+			clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 22, 0,
+			&aperclk_lock);
+	clks[lqspi_aper] = clk_register_gate(NULL, clk_output_name[lqspi_aper],
+			clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 23, 0,
+			&aperclk_lock);
+	clks[smc_aper] = clk_register_gate(NULL, clk_output_name[smc_aper],
+			clk_output_name[cpu_1x], 0, SLCR_APER_CLK_CTRL, 24, 0,
+			&aperclk_lock);
+
+	for (i = 0; i < ARRAY_SIZE(clks); i++) {
+		if (IS_ERR(clks[i])) {
+			pr_err("Zynq clk %d: register failed with %ld\n",
+			       i, PTR_ERR(clks[i]));
+			BUG();
+		}
+	}
+
+	clk_data.clks = clks;
+	clk_data.clk_num = ARRAY_SIZE(clks);
+	of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
+}
+
+CLK_OF_DECLARE(zynq_clkc, "xlnx,ps7-clkc", zynq_clk_setup);
+
+void __init zynq_clock_init(void)
+{
+	struct device_node *np;
+	struct device_node *slcr;
+	struct resource res;
+
+	np = of_find_compatible_node(NULL, NULL, "xlnx,ps7-clkc");
+	if (!np) {
+		pr_err("%s: clkc node not found\n", __func__);
+		goto np_err;
+	}
+
+	if (of_address_to_resource(np, 0, &res)) {
+		pr_err("%s: failed to get resource\n", np->name);
+		goto np_err;
+	}
+
+	slcr = of_get_parent(np);
+
+	if (slcr->data) {
+		zynq_clkc_base = (__force void __iomem *)slcr->data + res.start;
+	} else {
+		pr_err("%s: Unable to get I/O memory\n", np->name);
+		of_node_put(slcr);
+		goto np_err;
+	}
+
+	pr_info("%s: clkc starts at %p\n", __func__, zynq_clkc_base);
+
+	of_node_put(slcr);
+	of_node_put(np);
+
+	return;
+
+np_err:
+	of_node_put(np);
+	BUG();
+}
diff --git a/drivers/clk/zynq/pll.c b/drivers/clk/zynq/pll.c
new file mode 100644
index 000000000..00d72fb5c
--- /dev/null
+++ b/drivers/clk/zynq/pll.c
@@ -0,0 +1,242 @@
+/*
+ * Zynq PLL driver
+ *
+ *  Copyright (C) 2013 Xilinx
+ *
+ *  Sören Brinkmann <soren.brinkmann@xilinx.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License v2 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+#include <linux/clk/zynq.h>
+#include <linux/clk-provider.h>
+#include <linux/slab.h>
+#include <linux/io.h>
+
+/**
+ * struct zynq_pll
+ * @hw:		Handle between common and hardware-specific interfaces
+ * @pll_ctrl:	PLL control register
+ * @pll_status:	PLL status register
+ * @lock:	Register lock
+ * @lockbit:	Indicates the associated PLL_LOCKED bit in the PLL status
+ *		register.
+ */
+struct zynq_pll {
+	struct clk_hw	hw;
+	void __iomem	*pll_ctrl;
+	void __iomem	*pll_status;
+	spinlock_t	*lock;
+	u8		lockbit;
+};
+#define to_zynq_pll(_hw)	container_of(_hw, struct zynq_pll, hw)
+
+/* Register bitfield defines */
+#define PLLCTRL_FBDIV_MASK	0x7f000
+#define PLLCTRL_FBDIV_SHIFT	12
+#define PLLCTRL_BPQUAL_MASK	(1 << 3)
+#define PLLCTRL_PWRDWN_MASK	2
+#define PLLCTRL_PWRDWN_SHIFT	1
+#define PLLCTRL_RESET_MASK	1
+#define PLLCTRL_RESET_SHIFT	0
+
+#define PLL_FBDIV_MIN	13
+#define PLL_FBDIV_MAX	66
+
+/**
+ * zynq_pll_round_rate() - Round a clock frequency
+ * @hw:		Handle between common and hardware-specific interfaces
+ * @rate:	Desired clock frequency
+ * @prate:	Clock frequency of parent clock
+ * Returns frequency closest to @rate the hardware can generate.
+ */
+static long zynq_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+		unsigned long *prate)
+{
+	u32 fbdiv;
+
+	fbdiv = DIV_ROUND_CLOSEST(rate, *prate);
+	if (fbdiv < PLL_FBDIV_MIN)
+		fbdiv = PLL_FBDIV_MIN;
+	else if (fbdiv > PLL_FBDIV_MAX)
+		fbdiv = PLL_FBDIV_MAX;
+
+	return *prate * fbdiv;
+}
+
+/**
+ * zynq_pll_recalc_rate() - Recalculate clock frequency
+ * @hw:			Handle between common and hardware-specific interfaces
+ * @parent_rate:	Clock frequency of parent clock
+ * Returns current clock frequency.
+ */
+static unsigned long zynq_pll_recalc_rate(struct clk_hw *hw,
+		unsigned long parent_rate)
+{
+	struct zynq_pll *clk = to_zynq_pll(hw);
+	u32 fbdiv;
+
+	/*
+	 * makes probably sense to redundantly save fbdiv in the struct
+	 * zynq_pll to save the IO access.
+	 */
+	fbdiv = (clk_readl(clk->pll_ctrl) & PLLCTRL_FBDIV_MASK) >>
+			PLLCTRL_FBDIV_SHIFT;
+
+	return parent_rate * fbdiv;
+}
+
+/**
+ * zynq_pll_is_enabled - Check if a clock is enabled
+ * @hw:		Handle between common and hardware-specific interfaces
+ * Returns 1 if the clock is enabled, 0 otherwise.
+ *
+ * Not sure this is a good idea, but since disabled means bypassed for
+ * this clock implementation we say we are always enabled.
+ */
+static int zynq_pll_is_enabled(struct clk_hw *hw)
+{
+	unsigned long flags = 0;
+	u32 reg;
+	struct zynq_pll *clk = to_zynq_pll(hw);
+
+	spin_lock_irqsave(clk->lock, flags);
+
+	reg = clk_readl(clk->pll_ctrl);
+
+	spin_unlock_irqrestore(clk->lock, flags);
+
+	return !(reg & (PLLCTRL_RESET_MASK | PLLCTRL_PWRDWN_MASK));
+}
+
+/**
+ * zynq_pll_enable - Enable clock
+ * @hw:		Handle between common and hardware-specific interfaces
+ * Returns 0 on success
+ */
+static int zynq_pll_enable(struct clk_hw *hw)
+{
+	unsigned long flags = 0;
+	u32 reg;
+	struct zynq_pll *clk = to_zynq_pll(hw);
+
+	if (zynq_pll_is_enabled(hw))
+		return 0;
+
+	pr_info("PLL: enable\n");
+
+	/* Power up PLL and wait for lock */
+	spin_lock_irqsave(clk->lock, flags);
+
+	reg = clk_readl(clk->pll_ctrl);
+	reg &= ~(PLLCTRL_RESET_MASK | PLLCTRL_PWRDWN_MASK);
+	clk_writel(reg, clk->pll_ctrl);
+	while (!(clk_readl(clk->pll_status) & (1 << clk->lockbit)))
+		;
+
+	spin_unlock_irqrestore(clk->lock, flags);
+
+	return 0;
+}
+
+/**
+ * zynq_pll_disable - Disable clock
+ * @hw:		Handle between common and hardware-specific interfaces
+ * Returns 0 on success
+ */
+static void zynq_pll_disable(struct clk_hw *hw)
+{
+	unsigned long flags = 0;
+	u32 reg;
+	struct zynq_pll *clk = to_zynq_pll(hw);
+
+	if (!zynq_pll_is_enabled(hw))
+		return;
+
+	pr_info("PLL: shutdown\n");
+
+	/* shut down PLL */
+	spin_lock_irqsave(clk->lock, flags);
+
+	reg = clk_readl(clk->pll_ctrl);
+	reg |= PLLCTRL_RESET_MASK | PLLCTRL_PWRDWN_MASK;
+	clk_writel(reg, clk->pll_ctrl);
+
+	spin_unlock_irqrestore(clk->lock, flags);
+}
+
+static const struct clk_ops zynq_pll_ops = {
+	.enable = zynq_pll_enable,
+	.disable = zynq_pll_disable,
+	.is_enabled = zynq_pll_is_enabled,
+	.round_rate = zynq_pll_round_rate,
+	.recalc_rate = zynq_pll_recalc_rate
+};
+
+/**
+ * clk_register_zynq_pll() - Register PLL with the clock framework
+ * @name	PLL name
+ * @parent	Parent clock name
+ * @pll_ctrl	Pointer to PLL control register
+ * @pll_status	Pointer to PLL status register
+ * @lock_index	Bit index to this PLL's lock status bit in @pll_status
+ * @lock	Register lock
+ * Returns handle to the registered clock.
+ */
+struct clk *clk_register_zynq_pll(const char *name, const char *parent,
+		void __iomem *pll_ctrl, void __iomem *pll_status, u8 lock_index,
+		spinlock_t *lock)
+{
+	struct zynq_pll *pll;
+	struct clk *clk;
+	u32 reg;
+	const char *parent_arr[1] = {parent};
+	unsigned long flags = 0;
+	struct clk_init_data initd = {
+		.name = name,
+		.parent_names = parent_arr,
+		.ops = &zynq_pll_ops,
+		.num_parents = 1,
+		.flags = 0
+	};
+
+	pll = kmalloc(sizeof(*pll), GFP_KERNEL);
+	if (!pll)
+		return ERR_PTR(-ENOMEM);
+
+	/* Populate the struct */
+	pll->hw.init = &initd;
+	pll->pll_ctrl = pll_ctrl;
+	pll->pll_status = pll_status;
+	pll->lockbit = lock_index;
+	pll->lock = lock;
+
+	spin_lock_irqsave(pll->lock, flags);
+
+	reg = clk_readl(pll->pll_ctrl);
+	reg &= ~PLLCTRL_BPQUAL_MASK;
+	clk_writel(reg, pll->pll_ctrl);
+
+	spin_unlock_irqrestore(pll->lock, flags);
+
+	clk = clk_register(NULL, &pll->hw);
+	if (WARN_ON(IS_ERR(clk)))
+		goto free_pll;
+
+	return clk;
+
+free_pll:
+	kfree(pll);
+
+	return clk;
+}