[PATCH 5/7] clk: zynq: Add clock controller driver
Soren Brinkmann
soren.brinkmann at xilinx.com
Tue Apr 30 19:58:02 EDT 2013
Add a clock controller driver and documentation.
Signed-off-by: Soren Brinkmann <soren.brinkmann at xilinx.com>
Cc: Grant Likely <grant.likely at linaro.org>
Cc: Rob Herring <rob.herring at calxeda.com>
Cc: Rob Landley <rob at landley.net>
Cc: devicetree-discuss at lists.ozlabs.org
Cc: linux-doc at vger.kernel.org
---
.../devicetree/bindings/clock/zynq-7000.txt | 98 ++++
drivers/clk/zynq/clkc.c | 533 +++++++++++++++++++++
2 files changed, 631 insertions(+)
create mode 100644 drivers/clk/zynq/clkc.c
diff --git a/Documentation/devicetree/bindings/clock/zynq-7000.txt b/Documentation/devicetree/bindings/clock/zynq-7000.txt
index 23ae1db..30bfca9 100644
--- a/Documentation/devicetree/bindings/clock/zynq-7000.txt
+++ b/Documentation/devicetree/bindings/clock/zynq-7000.txt
@@ -6,6 +6,104 @@ The purpose of this document is to document their usage.
See clock_bindings.txt for more information on the generic clock bindings.
See Chapter 25 of Zynq TRM for more information about Zynq clocks.
+== Clock Controller ==
+The clock controller is a logical abstration of Zynq's clock tree. It reads
+required input clock frequencies from the devictree and acts as clock provider
+for all clock consumers of PS clocks.
+
+Required properties:
+ - #clock-cells : Must be 1
+ - compatible : "xlnx,ps7-clkc"
+ - ps-clk-frequency : Frequency of the oscillator providing ps_clk in HZ
+ (usually 33 MHz oscillators are used for Zynq platforms)
+ - clock-output-names : List of strings used to name the clock outputs. Shall be
+ a list of the outputs given below.
+
+Optional properties:
+ - clocks : as described in the clock bindings
+ - clock-names : as described in the clock bindings
+
+Clock inputs:
+The following strings are optional parameters to the 'clock-names' property in
+order to provide an optional (E)MIO clock source.
+ - swdt_ext_clk
+ - gem0_emio_clk
+ - gem1_emio_clk
+ - mio_clk_XX # with XX = 00..53
+...
+
+Clock outputs:
+ 0: armpll
+ 1: ddrpll
+ 2: iopll
+ 3: cpu_6or4x
+ 4: cpu_3or2x
+ 5: cpu_2x
+ 6: cpu_1x
+ 7: ddr2x
+ 8: ddr3x
+ 9: dci
+ 10: lqspi
+ 11: smc
+ 12: pcap
+ 13: gem0
+ 14: gem1
+ 15: fclk0
+ 16: fclk1
+ 17: fclk2
+ 18: fclk3
+ 19: can0
+ 20: can1
+ 21: sdio0
+ 22: sdio1
+ 23: uart0
+ 24: uart1
+ 25: spi0
+ 26: spi1
+ 27: dma
+ 28: usb0_aper
+ 29: usb1_aper
+ 30: gem0_aper
+ 31: gem1_aper
+ 32: sdio0_aper
+ 33: sdio1_aper
+ 34: spi0_aper
+ 35: spi1_aper
+ 36: can0_aper
+ 37: can1_aper
+ 38: i2c0_aper
+ 39: i2c1_aper
+ 40: uart0_aper
+ 41: uart1_aper
+ 42: gpio_aper
+ 43: lqspi_aper
+ 44: smc_aper
+ 45: swdt
+ 46: dbg_trc
+ 47: dbg_apb
+
+Example:
+ clkc: clkc {
+ #clock-cells = <1>;
+ compatible = "xlnx,ps7-clkc";
+ ps-clk-frequency = <33333333>;
+ clock-output-names = "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";
+ # optional props
+ clocks = <&clkc 16>, <&clk_foo>;
+ clock-names = "gem1_emio_clk", "can_mio_clk_23";
+ };
+
+
== PLLs ==
Used to describe the ARM_PLL, DDR_PLL, and IO_PLL.
diff --git a/drivers/clk/zynq/clkc.c b/drivers/clk/zynq/clkc.c
new file mode 100644
index 0000000..5c205b6
--- /dev/null
+++ b/drivers/clk/zynq/clkc.c
@@ -0,0 +1,533 @@
+/*
+ * Zynq clock controller
+ *
+ * Copyright (C) 2012 - 2013 Xilinx
+ *
+ * Sören Brinkmann <soren.brinkmann at 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/slab.h>
+#include <linux/string.h>
+#include <linux/io.h>
+
+static void __iomem *zynq_slcr_base_priv;
+
+#define SLCR_ARMPLL_CTRL (zynq_slcr_base_priv + 0x100)
+#define SLCR_DDRPLL_CTRL (zynq_slcr_base_priv + 0x104)
+#define SLCR_IOPLL_CTRL (zynq_slcr_base_priv + 0x108)
+#define SLCR_PLL_STATUS (zynq_slcr_base_priv + 0x10c)
+#define SLCR_ARM_CLK_CTRL (zynq_slcr_base_priv + 0x120)
+#define SLCR_DDR_CLK_CTRL (zynq_slcr_base_priv + 0x124)
+#define SLCR_DCI_CLK_CTRL (zynq_slcr_base_priv + 0x128)
+#define SLCR_APER_CLK_CTRL (zynq_slcr_base_priv + 0x12c)
+#define SLCR_GEM0_CLK_CTRL (zynq_slcr_base_priv + 0x140)
+#define SLCR_GEM1_CLK_CTRL (zynq_slcr_base_priv + 0x144)
+#define SLCR_SMC_CLK_CTRL (zynq_slcr_base_priv + 0x148)
+#define SLCR_LQSPI_CLK_CTRL (zynq_slcr_base_priv + 0x14c)
+#define SLCR_SDIO_CLK_CTRL (zynq_slcr_base_priv + 0x150)
+#define SLCR_UART_CLK_CTRL (zynq_slcr_base_priv + 0x154)
+#define SLCR_SPI_CLK_CTRL (zynq_slcr_base_priv + 0x158)
+#define SLCR_CAN_CLK_CTRL (zynq_slcr_base_priv + 0x15c)
+#define SLCR_CAN_MIOCLK_CTRL (zynq_slcr_base_priv + 0x160)
+#define SLCR_DBG_CLK_CTRL (zynq_slcr_base_priv + 0x164)
+#define SLCR_PCAP_CLK_CTRL (zynq_slcr_base_priv + 0x168)
+#define SLCR_FPGA0_CLK_CTRL (zynq_slcr_base_priv + 0x170)
+#define SLCR_621_TRUE (zynq_slcr_base_priv + 0x1c4)
+#define SLCR_SWDT_CLK_SEL (zynq_slcr_base_priv + 0x304)
+
+#define NUM_MIO_PINS 54
+
+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(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 dummy_nm[] __initconst = "dummy_name";
+
+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_nm};
+static const char *gem1_mux_parents[] __initdata = {"gem1_div1", dummy_nm};
+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_nm};
+
+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)
+{
+ struct clk *clk;
+ 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;
+ spin_lock_init(fclk_lock);
+ spin_lock_init(fclk_gate_lock);
+
+ mux_name = kasprintf(GFP_KERNEL, "%s_mux", clk_name);
+ div0_name = kasprintf(GFP_KERNEL, "%s_div0", clk_name);
+ div1_name = kasprintf(GFP_KERNEL, "%s_div1", clk_name);
+
+ clk = clk_register_mux(NULL, mux_name, parents, 4, 0,
+ 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);
+ kfree(mux_name);
+ kfree(div0_name);
+ kfree(div1_name);
+
+ return;
+
+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, 0,
+ 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;
+ 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];
+
+ 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];
+
+ /* 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, 0, 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, 0, 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, 0, SLCR_IOPLL_CTRL, 4, 1, 0,
+ &iopll_lock);
+
+ /* CPU clocks */
+ tmp = readl(SLCR_621_TRUE) & 1;
+ clk = clk_register_mux(NULL, "cpu_mux", cpu_parents, 4, 0,
+ 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 = 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,
+ SLCR_SWDT_CLK_SEL, 0, 1, 0, &gem0clk_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++)
+ zynq_clk_register_fclk(i, clk_output_name[i],
+ SLCR_FPGA0_CLK_CTRL + 0x10 * (i - fclk0),
+ periph_parents);
+
+ 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, 0,
+ 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, 0,
+ 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, 0,
+ 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, 0,
+ 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, 0,
+ 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,
+ 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,
+ 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,
+ 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,
+ 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, 0,
+ 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, 0,
+ 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);
+
+ /* 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 __iomem *slcr_base)
+{
+ zynq_slcr_base_priv = slcr_base;
+ of_clk_init(NULL);
+}
--
1.8.2.2
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