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-rw-r--r--drivers/clk/Makefile2
-rw-r--r--drivers/clk/clk-zynq.c378
-rw-r--r--drivers/clk/zynq/Makefile3
-rw-r--r--drivers/clk/zynq/clkc.c533
-rw-r--r--drivers/clk/zynq/pll.c235
5 files changed, 772 insertions, 379 deletions
diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index 137d3e7..fa435bc 100644
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -27,7 +27,7 @@ obj-$(CONFIG_MACH_LOONGSON1) += clk-ls1x.o
obj-$(CONFIG_ARCH_SUNXI) += sunxi/
obj-$(CONFIG_ARCH_U8500) += ux500/
obj-$(CONFIG_ARCH_VT8500) += clk-vt8500.o
-obj-$(CONFIG_ARCH_ZYNQ) += clk-zynq.o
+obj-$(CONFIG_ARCH_ZYNQ) += zynq/
obj-$(CONFIG_ARCH_TEGRA) += tegra/
obj-$(CONFIG_PLAT_SAMSUNG) += samsung/
diff --git a/drivers/clk/clk-zynq.c b/drivers/clk/clk-zynq.c
deleted file mode 100644
index 3206297..0000000
--- a/drivers/clk/clk-zynq.c
+++ /dev/null
@@ -1,378 +0,0 @@
-/*
- * Copyright (c) 2012 National Instruments
- *
- * Josh Cartwright <josh.cartwright@ni.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope 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/io.h>
-#include <linux/of.h>
-#include <linux/slab.h>
-#include <linux/kernel.h>
-#include <linux/clk-provider.h>
-#include <linux/clk/zynq.h>
-
-static void __iomem *slcr_base;
-
-struct zynq_pll_clk {
- struct clk_hw hw;
- void __iomem *pll_ctrl;
- void __iomem *pll_cfg;
-};
-
-#define to_zynq_pll_clk(hw) container_of(hw, struct zynq_pll_clk, hw)
-
-#define CTRL_PLL_FDIV(x) ((x) >> 12)
-
-static unsigned long zynq_pll_recalc_rate(struct clk_hw *hw,
- unsigned long parent_rate)
-{
- struct zynq_pll_clk *pll = to_zynq_pll_clk(hw);
- return parent_rate * CTRL_PLL_FDIV(ioread32(pll->pll_ctrl));
-}
-
-static const struct clk_ops zynq_pll_clk_ops = {
- .recalc_rate = zynq_pll_recalc_rate,
-};
-
-static void __init zynq_pll_clk_setup(struct device_node *np)
-{
- struct clk_init_data init;
- struct zynq_pll_clk *pll;
- const char *parent_name;
- struct clk *clk;
- u32 regs[2];
- int ret;
-
- ret = of_property_read_u32_array(np, "reg", regs, ARRAY_SIZE(regs));
- if (WARN_ON(ret))
- return;
-
- pll = kzalloc(sizeof(*pll), GFP_KERNEL);
- if (WARN_ON(!pll))
- return;
-
- pll->pll_ctrl = slcr_base + regs[0];
- pll->pll_cfg = slcr_base + regs[1];
-
- of_property_read_string(np, "clock-output-names", &init.name);
-
- init.ops = &zynq_pll_clk_ops;
- parent_name = of_clk_get_parent_name(np, 0);
- init.parent_names = &parent_name;
- init.num_parents = 1;
-
- pll->hw.init = &init;
-
- clk = clk_register(NULL, &pll->hw);
- if (WARN_ON(IS_ERR(clk)))
- return;
-
- ret = of_clk_add_provider(np, of_clk_src_simple_get, clk);
- if (WARN_ON(ret))
- return;
-}
-CLK_OF_DECLARE(zynq_pll, "xlnx,zynq-pll", zynq_pll_clk_setup);
-
-struct zynq_periph_clk {
- struct clk_hw hw;
- struct clk_onecell_data onecell_data;
- struct clk *gates[2];
- void __iomem *clk_ctrl;
- spinlock_t clkact_lock;
-};
-
-#define to_zynq_periph_clk(hw) container_of(hw, struct zynq_periph_clk, hw)
-
-static const u8 periph_clk_parent_map[] = {
- 0, 0, 1, 2
-};
-#define PERIPH_CLK_CTRL_SRC(x) (periph_clk_parent_map[((x) & 0x30) >> 4])
-#define PERIPH_CLK_CTRL_DIV(x) (((x) & 0x3F00) >> 8)
-
-static unsigned long zynq_periph_recalc_rate(struct clk_hw *hw,
- unsigned long parent_rate)
-{
- struct zynq_periph_clk *periph = to_zynq_periph_clk(hw);
- return parent_rate / PERIPH_CLK_CTRL_DIV(ioread32(periph->clk_ctrl));
-}
-
-static u8 zynq_periph_get_parent(struct clk_hw *hw)
-{
- struct zynq_periph_clk *periph = to_zynq_periph_clk(hw);
- return PERIPH_CLK_CTRL_SRC(ioread32(periph->clk_ctrl));
-}
-
-static const struct clk_ops zynq_periph_clk_ops = {
- .recalc_rate = zynq_periph_recalc_rate,
- .get_parent = zynq_periph_get_parent,
-};
-
-static void __init zynq_periph_clk_setup(struct device_node *np)
-{
- struct zynq_periph_clk *periph;
- const char *parent_names[3];
- struct clk_init_data init;
- int clk_num = 0, err;
- const char *name;
- struct clk *clk;
- u32 reg;
- int i;
-
- err = of_property_read_u32(np, "reg", &reg);
- if (WARN_ON(err))
- return;
-
- periph = kzalloc(sizeof(*periph), GFP_KERNEL);
- if (WARN_ON(!periph))
- return;
-
- periph->clk_ctrl = slcr_base + reg;
- spin_lock_init(&periph->clkact_lock);
-
- init.name = np->name;
- init.ops = &zynq_periph_clk_ops;
- for (i = 0; i < ARRAY_SIZE(parent_names); i++)
- parent_names[i] = of_clk_get_parent_name(np, i);
- init.parent_names = parent_names;
- init.num_parents = ARRAY_SIZE(parent_names);
-
- periph->hw.init = &init;
-
- clk = clk_register(NULL, &periph->hw);
- if (WARN_ON(IS_ERR(clk)))
- return;
-
- err = of_clk_add_provider(np, of_clk_src_simple_get, clk);
- if (WARN_ON(err))
- return;
-
- err = of_property_read_string_index(np, "clock-output-names", 0,
- &name);
- if (WARN_ON(err))
- return;
-
- periph->gates[0] = clk_register_gate(NULL, name, np->name, 0,
- periph->clk_ctrl, 0, 0,
- &periph->clkact_lock);
- if (WARN_ON(IS_ERR(periph->gates[0])))
- return;
- clk_num++;
-
- /* some periph clks have 2 downstream gates */
- err = of_property_read_string_index(np, "clock-output-names", 1,
- &name);
- if (err != -ENODATA) {
- periph->gates[1] = clk_register_gate(NULL, name, np->name, 0,
- periph->clk_ctrl, 1, 0,
- &periph->clkact_lock);
- if (WARN_ON(IS_ERR(periph->gates[1])))
- return;
- clk_num++;
- }
-
- periph->onecell_data.clks = periph->gates;
- periph->onecell_data.clk_num = clk_num;
-
- err = of_clk_add_provider(np, of_clk_src_onecell_get,
- &periph->onecell_data);
- if (WARN_ON(err))
- return;
-}
-CLK_OF_DECLARE(zynq_periph, "xlnx,zynq-periph-clock", zynq_periph_clk_setup);
-
-/* CPU Clock domain is modelled as a mux with 4 children subclks, whose
- * derivative rates depend on CLK_621_TRUE
- */
-
-struct zynq_cpu_clk {
- struct clk_hw hw;
- struct clk_onecell_data onecell_data;
- struct clk *subclks[4];
- void __iomem *clk_ctrl;
- spinlock_t clkact_lock;
-};
-
-#define to_zynq_cpu_clk(hw) container_of(hw, struct zynq_cpu_clk, hw)
-
-static const u8 zynq_cpu_clk_parent_map[] = {
- 1, 1, 2, 0
-};
-#define CPU_CLK_SRCSEL(x) (zynq_cpu_clk_parent_map[(((x) & 0x30) >> 4)])
-#define CPU_CLK_CTRL_DIV(x) (((x) & 0x3F00) >> 8)
-
-static u8 zynq_cpu_clk_get_parent(struct clk_hw *hw)
-{
- struct zynq_cpu_clk *cpuclk = to_zynq_cpu_clk(hw);
- return CPU_CLK_SRCSEL(ioread32(cpuclk->clk_ctrl));
-}
-
-static unsigned long zynq_cpu_clk_recalc_rate(struct clk_hw *hw,
- unsigned long parent_rate)
-{
- struct zynq_cpu_clk *cpuclk = to_zynq_cpu_clk(hw);
- return parent_rate / CPU_CLK_CTRL_DIV(ioread32(cpuclk->clk_ctrl));
-}
-
-static const struct clk_ops zynq_cpu_clk_ops = {
- .get_parent = zynq_cpu_clk_get_parent,
- .recalc_rate = zynq_cpu_clk_recalc_rate,
-};
-
-struct zynq_cpu_subclk {
- struct clk_hw hw;
- void __iomem *clk_621;
- enum {
- CPU_SUBCLK_6X4X,
- CPU_SUBCLK_3X2X,
- CPU_SUBCLK_2X,
- CPU_SUBCLK_1X,
- } which;
-};
-
-#define CLK_621_TRUE(x) ((x) & 1)
-
-#define to_zynq_cpu_subclk(hw) container_of(hw, struct zynq_cpu_subclk, hw);
-
-static unsigned long zynq_cpu_subclk_recalc_rate(struct clk_hw *hw,
- unsigned long parent_rate)
-{
- unsigned long uninitialized_var(rate);
- struct zynq_cpu_subclk *subclk;
- bool is_621;
-
- subclk = to_zynq_cpu_subclk(hw)
- is_621 = CLK_621_TRUE(ioread32(subclk->clk_621));
-
- switch (subclk->which) {
- case CPU_SUBCLK_6X4X:
- rate = parent_rate;
- break;
- case CPU_SUBCLK_3X2X:
- rate = parent_rate / 2;
- break;
- case CPU_SUBCLK_2X:
- rate = parent_rate / (is_621 ? 3 : 2);
- break;
- case CPU_SUBCLK_1X:
- rate = parent_rate / (is_621 ? 6 : 4);
- break;
- };
-
- return rate;
-}
-
-static const struct clk_ops zynq_cpu_subclk_ops = {
- .recalc_rate = zynq_cpu_subclk_recalc_rate,
-};
-
-static struct clk *zynq_cpu_subclk_setup(struct device_node *np, u8 which,
- void __iomem *clk_621)
-{
- struct zynq_cpu_subclk *subclk;
- struct clk_init_data init;
- struct clk *clk;
- int err;
-
- err = of_property_read_string_index(np, "clock-output-names",
- which, &init.name);
- if (WARN_ON(err))
- goto err_read_output_name;
-
- subclk = kzalloc(sizeof(*subclk), GFP_KERNEL);
- if (!subclk)
- goto err_subclk_alloc;
-
- subclk->clk_621 = clk_621;
- subclk->which = which;
-
- init.ops = &zynq_cpu_subclk_ops;
- init.parent_names = &np->name;
- init.num_parents = 1;
-
- subclk->hw.init = &init;
-
- clk = clk_register(NULL, &subclk->hw);
- if (WARN_ON(IS_ERR(clk)))
- goto err_clk_register;
-
- return clk;
-
-err_clk_register:
- kfree(subclk);
-err_subclk_alloc:
-err_read_output_name:
- return ERR_PTR(-EINVAL);
-}
-
-static void __init zynq_cpu_clk_setup(struct device_node *np)
-{
- struct zynq_cpu_clk *cpuclk;
- const char *parent_names[3];
- struct clk_init_data init;
- void __iomem *clk_621;
- struct clk *clk;
- u32 reg[2];
- int err;
- int i;
-
- err = of_property_read_u32_array(np, "reg", reg, ARRAY_SIZE(reg));
- if (WARN_ON(err))
- return;
-
- cpuclk = kzalloc(sizeof(*cpuclk), GFP_KERNEL);
- if (WARN_ON(!cpuclk))
- return;
-
- cpuclk->clk_ctrl = slcr_base + reg[0];
- clk_621 = slcr_base + reg[1];
- spin_lock_init(&cpuclk->clkact_lock);
-
- init.name = np->name;
- init.ops = &zynq_cpu_clk_ops;
- for (i = 0; i < ARRAY_SIZE(parent_names); i++)
- parent_names[i] = of_clk_get_parent_name(np, i);
- init.parent_names = parent_names;
- init.num_parents = ARRAY_SIZE(parent_names);
-
- cpuclk->hw.init = &init;
-
- clk = clk_register(NULL, &cpuclk->hw);
- if (WARN_ON(IS_ERR(clk)))
- return;
-
- err = of_clk_add_provider(np, of_clk_src_simple_get, clk);
- if (WARN_ON(err))
- return;
-
- for (i = 0; i < 4; i++) {
- cpuclk->subclks[i] = zynq_cpu_subclk_setup(np, i, clk_621);
- if (WARN_ON(IS_ERR(cpuclk->subclks[i])))
- return;
- }
-
- cpuclk->onecell_data.clks = cpuclk->subclks;
- cpuclk->onecell_data.clk_num = i;
-
- err = of_clk_add_provider(np, of_clk_src_onecell_get,
- &cpuclk->onecell_data);
- if (WARN_ON(err))
- return;
-}
-CLK_OF_DECLARE(zynq_cpu, "xlnx,zynq-cpu-clock", zynq_cpu_clk_setup);
-
-void __init xilinx_zynq_clocks_init(void __iomem *slcr)
-{
- slcr_base = slcr;
- of_clk_init(NULL);
-}
diff --git a/drivers/clk/zynq/Makefile b/drivers/clk/zynq/Makefile
new file mode 100644
index 0000000..156d923
--- /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 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@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);
+}
diff --git a/drivers/clk/zynq/pll.c b/drivers/clk/zynq/pll.c
new file mode 100644
index 0000000..47e307c
--- /dev/null
+++ b/drivers/clk/zynq/pll.c
@@ -0,0 +1,235 @@
+/*
+ * 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
+
+/**
+ * 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 < 13)
+ fbdiv = 13;
+ else if (fbdiv > 66)
+ fbdiv = 66;
+
+ 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 = (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 = 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 = readl(clk->pll_ctrl);
+ reg &= ~(PLLCTRL_RESET_MASK | PLLCTRL_PWRDWN_MASK);
+ writel(reg, clk->pll_ctrl);
+ while (!(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 = readl(clk->pll_ctrl);
+ reg |= PLLCTRL_RESET_MASK | PLLCTRL_PWRDWN_MASK;
+ 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
+ * @np Pointer to the DT device node
+ */
+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) {
+ pr_err("%s: Could not allocate Zynq PLL clk.\n", __func__);
+ 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 = readl(pll->pll_ctrl);
+ reg &= ~PLLCTRL_BPQUAL_MASK;
+ 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;
+}
generated by cgit v0.10.2 at 2024-11-11 21:13:33 (GMT)