Merge branches 'clk-of-refcount', 'clk-mmio-fixed-clock', 'clk-remove-clps', 'clk-socfpga-parent' and 'clk-struct-size' into clk-next

- Various DT of_node refcount fixes
 - Support for fixed rate clks populated from an MMIO register
 - Remove clps711x driver as the board support is gone

* clk-of-refcount:
  clk: dove: fix refcount leak in dove_clk_init()
  clk: mv98dx3236: fix refcount leak in mv98dx3236_clk_init()
  clk: armada-xp: fix refcount leak in axp_clk_init()
  clk: kirkwood: fix refcount leak in kirkwood_clk_init()
  clk: armada-370: fix refcount leak in a370_clk_init()
  clk: vf610: fix refcount leak in vf610_clocks_init()
  clk: imx7d: fix refcount leak in imx7d_clocks_init()
  clk: imx6sx: fix refcount leak in imx6sx_clocks_init()
  clk: imx6q: fix refcount leak in imx6q_clocks_init()
  clk: samsung: exynos4: fix refcount leak in exynos4_get_xom()
  clk: socfpga: fix refcount leak
  clk: ti: fix refcount leak in ti_dt_clocks_register()
  clk: qoriq: fix refcount leak in clockgen_init()
  clk: highbank: fix refcount leak in hb_clk_init()

* clk-mmio-fixed-clock:
  clk: Add Fixed MMIO clock driver
  dt-bindings: clk: Add bindings for Fixed MMIO clock

* clk-remove-clps:
  clk: clps711x: Remove board support

* clk-socfpga-parent:
  clk: socfpga: Don't have get_parent for single parent ops

* clk-struct-size:
  clk: imx: imx7ulp: use struct_size() in kzalloc()

Documentation/devicetree/bindings/clock/fixed-mmio-clock.txt

@@ -0,0 +1,24 @@
+Binding for simple memory mapped io fixed-rate clock sources.
+The driver reads a clock frequency value from a single 32-bit memory mapped
+I/O register and registers it as a fixed rate clock.
+
+It was designed for test systems, like FPGA, not for complete, finished SoCs.
+
+This binding uses the common clock binding[1].
+
+[1] Documentation/devicetree/bindings/clock/clock-bindings.txt
+
+Required properties:
+- compatible : shall be "fixed-mmio-clock".
+- #clock-cells : from common clock binding; shall be set to 0.
+- reg : Address and length of the clock value register set.
+
+Optional properties:
+- clock-output-names : From common clock binding.
+
+Example:
+sysclock: sysclock@fd020004 {
+	#clock-cells = <0>;
+	compatible = "fixed-mmio-clock";
+	reg = <0xfd020004 0x4>;
+};

drivers/clk/Kconfig

@@ -290,6 +290,12 @@ config COMMON_CLK_BD718XX
 	  This driver supports ROHM BD71837 and ROHM BD71847
 	  PMICs clock gates.
 
+config COMMON_CLK_FIXED_MMIO
+	bool "Clock driver for Memory Mapped Fixed values"
+	depends on COMMON_CLK && OF
+	help
+	  Support for Memory Mapped IO Fixed clocks
+
 source "drivers/clk/actions/Kconfig"
 source "drivers/clk/bcm/Kconfig"
 source "drivers/clk/hisilicon/Kconfig"

drivers/clk/Makefile

@@ -27,6 +27,7 @@ obj-$(CONFIG_COMMON_CLK_CDCE925)	+= clk-cdce925.o
 obj-$(CONFIG_ARCH_CLPS711X)		+= clk-clps711x.o
 obj-$(CONFIG_COMMON_CLK_CS2000_CP)	+= clk-cs2000-cp.o
 obj-$(CONFIG_ARCH_EFM32)		+= clk-efm32gg.o
+obj-$(CONFIG_COMMON_CLK_FIXED_MMIO)	+= clk-fixed-mmio.o
 obj-$(CONFIG_COMMON_CLK_GEMINI)		+= clk-gemini.o
 obj-$(CONFIG_COMMON_CLK_ASPEED)		+= clk-aspeed.o
 obj-$(CONFIG_ARCH_HIGHBANK)		+= clk-highbank.o

drivers/clk/clk-clps711x.c

@@ -44,21 +44,21 @@ struct clps711x_clk {
 	struct clk_hw_onecell_data	clk_data;
 };
 
-static struct clps711x_clk * __init _clps711x_clk_init(void __iomem *base,
-						       u32 fref)
+static void __init clps711x_clk_init_dt(struct device_node *np)
 {
-	u32 tmp, f_cpu, f_pll, f_bus, f_tim, f_pwm, f_spi;
+	u32 tmp, f_cpu, f_pll, f_bus, f_tim, f_pwm, f_spi, fref = 0;
 	struct clps711x_clk *clps711x_clk;
-	unsigned i;
+	void __iomem *base;
 
-	if (!base)
-		return ERR_PTR(-ENOMEM);
+	WARN_ON(of_property_read_u32(np, "startup-frequency", &fref));
+
+	base = of_iomap(np, 0);
+	BUG_ON(!base);
 
 	clps711x_clk = kzalloc(struct_size(clps711x_clk, clk_data.hws,
 					   CLPS711X_CLK_MAX),
 			       GFP_KERNEL);
-	if (!clps711x_clk)
-		return ERR_PTR(-ENOMEM);
+	BUG_ON(!clps711x_clk);
 
 	spin_lock_init(&clps711x_clk->lock);
 
@@ -137,52 +137,13 @@ static struct clps711x_clk * __init _clps711x_clk_init(void __iomem *base,
 		clk_hw_register_fixed_factor(NULL, "uart", "bus", 0, 1, 10);
 	clps711x_clk->clk_data.hws[CLPS711X_CLK_TICK] =
 		clk_hw_register_fixed_rate(NULL, "tick", NULL, 0, 64);
-	for (i = 0; i < CLPS711X_CLK_MAX; i++)
-		if (IS_ERR(clps711x_clk->clk_data.hws[i]))
+	for (tmp = 0; tmp < CLPS711X_CLK_MAX; tmp++)
+		if (IS_ERR(clps711x_clk->clk_data.hws[tmp]))
 			pr_err("clk %i: register failed with %ld\n",
-			       i, PTR_ERR(clps711x_clk->clk_data.hws[i]));
-
-	return clps711x_clk;
-}
-
-void __init clps711x_clk_init(void __iomem *base)
-{
-	struct clps711x_clk *clps711x_clk;
-
-	clps711x_clk = _clps711x_clk_init(base, 73728000);
-
-	BUG_ON(IS_ERR(clps711x_clk));
-
-	/* Clocksource */
-	clk_hw_register_clkdev(clps711x_clk->clk_data.hws[CLPS711X_CLK_TIMER1],
-			    NULL, "clps711x-timer.0");
-	clk_hw_register_clkdev(clps711x_clk->clk_data.hws[CLPS711X_CLK_TIMER2],
-			    NULL, "clps711x-timer.1");
-
-	/* Drivers */
-	clk_hw_register_clkdev(clps711x_clk->clk_data.hws[CLPS711X_CLK_PWM],
-			    NULL, "clps711x-pwm");
-	clk_hw_register_clkdev(clps711x_clk->clk_data.hws[CLPS711X_CLK_UART],
-			    NULL, "clps711x-uart.0");
-	clk_hw_register_clkdev(clps711x_clk->clk_data.hws[CLPS711X_CLK_UART],
-			    NULL, "clps711x-uart.1");
-}
-
-#ifdef CONFIG_OF
-static void __init clps711x_clk_init_dt(struct device_node *np)
-{
-	void __iomem *base = of_iomap(np, 0);
-	struct clps711x_clk *clps711x_clk;
-	u32 fref = 0;
-
-	WARN_ON(of_property_read_u32(np, "startup-frequency", &fref));
-
-	clps711x_clk = _clps711x_clk_init(base, fref);
-	BUG_ON(IS_ERR(clps711x_clk));
+			       tmp, PTR_ERR(clps711x_clk->clk_data.hws[tmp]));
 
 	clps711x_clk->clk_data.num = CLPS711X_CLK_MAX;
 	of_clk_add_hw_provider(np, of_clk_hw_onecell_get,
 			       &clps711x_clk->clk_data);
 }
 CLK_OF_DECLARE(clps711x, "cirrus,ep7209-clk", clps711x_clk_init_dt);
-#endif

drivers/clk/clk-fixed-mmio.c

@@ -0,0 +1,101 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/*
+ * Memory Mapped IO Fixed clock driver
+ *
+ * Copyright (C) 2018 Cadence Design Systems, Inc.
+ *
+ * Authors:
+ *	Jan Kotas <jank@cadence.com>
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/of_address.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+static struct clk_hw *fixed_mmio_clk_setup(struct device_node *node)
+{
+	struct clk_hw *clk;
+	const char *clk_name = node->name;
+	void __iomem *base;
+	u32 freq;
+	int ret;
+
+	base = of_iomap(node, 0);
+	if (!base) {
+		pr_err("%pOFn: failed to map address\n", node);
+		return ERR_PTR(-EIO);
+	}
+
+	freq = readl(base);
+	iounmap(base);
+	of_property_read_string(node, "clock-output-names", &clk_name);
+
+	clk = clk_hw_register_fixed_rate(NULL, clk_name, NULL, 0, freq);
+	if (IS_ERR(clk)) {
+		pr_err("%pOFn: failed to register fixed rate clock\n", node);
+		return clk;
+	}
+
+	ret = of_clk_add_hw_provider(node, of_clk_hw_simple_get, clk);
+	if (ret) {
+		pr_err("%pOFn: failed to add clock provider\n", node);
+		clk_hw_unregister(clk);
+		clk = ERR_PTR(ret);
+	}
+
+	return clk;
+}
+
+static void __init of_fixed_mmio_clk_setup(struct device_node *node)
+{
+	fixed_mmio_clk_setup(node);
+}
+CLK_OF_DECLARE(fixed_mmio_clk, "fixed-mmio-clock", of_fixed_mmio_clk_setup);
+
+/**
+ * This is not executed when of_fixed_mmio_clk_setup succeeded.
+ */
+static int of_fixed_mmio_clk_probe(struct platform_device *pdev)
+{
+	struct clk_hw *clk;
+
+	clk = fixed_mmio_clk_setup(pdev->dev.of_node);
+	if (IS_ERR(clk))
+		return PTR_ERR(clk);
+
+	platform_set_drvdata(pdev, clk);
+
+	return 0;
+}
+
+static int of_fixed_mmio_clk_remove(struct platform_device *pdev)
+{
+	struct clk_hw *clk = platform_get_drvdata(pdev);
+
+	of_clk_del_provider(pdev->dev.of_node);
+	clk_hw_unregister_fixed_rate(clk);
+
+	return 0;
+}
+
+static const struct of_device_id of_fixed_mmio_clk_ids[] = {
+	{ .compatible = "fixed-mmio-clock" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, of_fixed_mmio_clk_ids);
+
+static struct platform_driver of_fixed_mmio_clk_driver = {
+	.driver = {
+		.name = "of_fixed_mmio_clk",
+		.of_match_table = of_fixed_mmio_clk_ids,
+	},
+	.probe = of_fixed_mmio_clk_probe,
+	.remove = of_fixed_mmio_clk_remove,
+};
+module_platform_driver(of_fixed_mmio_clk_driver);
+
+MODULE_AUTHOR("Jan Kotas <jank@cadence.com>");
+MODULE_DESCRIPTION("Memory Mapped IO Fixed clock driver");
+MODULE_LICENSE("GPL v2");

drivers/clk/clk-highbank.c

@@ -293,6 +293,7 @@ static __init struct clk *hb_clk_init(struct device_node *node, const struct clk
 	/* Map system registers */
 	srnp = of_find_compatible_node(NULL, NULL, "calxeda,hb-sregs");
 	hb_clk->reg = of_iomap(srnp, 0);
+	of_node_put(srnp);
 	BUG_ON(!hb_clk->reg);
 	hb_clk->reg += reg;
 

drivers/clk/clk-qoriq.c

@@ -1389,6 +1389,7 @@ static void __init clockgen_init(struct device_node *np)
 				pr_err("%s: Couldn't map %pOF regs\n", __func__,
 				       guts);
 			}
+			of_node_put(guts);
 		}
 
 	}

drivers/clk/imx/clk-imx6q.c

@@ -471,6 +471,7 @@ static void __init imx6q_clocks_init(struct device_node *ccm_node)
 	np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-anatop");
 	anatop_base = base = of_iomap(np, 0);
 	WARN_ON(!base);
+	of_node_put(np);
 
 	/* Audio/video PLL post dividers do not work on i.MX6q revision 1.0 */
 	if (clk_on_imx6q() && imx_get_soc_revision() == IMX_CHIP_REVISION_1_0) {

drivers/clk/imx/clk-imx6sx.c

@@ -151,6 +151,7 @@ static void __init imx6sx_clocks_init(struct device_node *ccm_node)
 	np = of_find_compatible_node(NULL, NULL, "fsl,imx6sx-anatop");
 	base = of_iomap(np, 0);
 	WARN_ON(!base);
+	of_node_put(np);
 
 	clks[IMX6SX_PLL1_BYPASS_SRC] = imx_clk_mux("pll1_bypass_src", base + 0x00, 14, 1, pll_bypass_src_sels, ARRAY_SIZE(pll_bypass_src_sels));
 	clks[IMX6SX_PLL2_BYPASS_SRC] = imx_clk_mux("pll2_bypass_src", base + 0x30, 14, 1, pll_bypass_src_sels, ARRAY_SIZE(pll_bypass_src_sels));

drivers/clk/imx/clk-imx7d.c

@@ -404,6 +404,7 @@ static void __init imx7d_clocks_init(struct device_node *ccm_node)
 	np = of_find_compatible_node(NULL, NULL, "fsl,imx7d-anatop");
 	base = of_iomap(np, 0);
 	WARN_ON(!base);
+	of_node_put(np);
 
 	clks[IMX7D_PLL_ARM_MAIN_SRC]  = imx_clk_mux("pll_arm_main_src", base + 0x60, 14, 2, pll_bypass_src_sel, ARRAY_SIZE(pll_bypass_src_sel));
 	clks[IMX7D_PLL_DRAM_MAIN_SRC] = imx_clk_mux("pll_dram_main_src", base + 0x70, 14, 2, pll_bypass_src_sel, ARRAY_SIZE(pll_bypass_src_sel));

drivers/clk/imx/clk-imx7ulp.c

@@ -48,8 +48,8 @@ static void __init imx7ulp_clk_scg1_init(struct device_node *np)
 	struct clk_hw **clks;
 	void __iomem *base;
 
-	clk_data = kzalloc(sizeof(*clk_data) + sizeof(*clk_data->hws) *
-			   IMX7ULP_CLK_SCG1_END, GFP_KERNEL);
+	clk_data = kzalloc(struct_size(clk_data, hws, IMX7ULP_CLK_SCG1_END),
+			   GFP_KERNEL);
 	if (!clk_data)
 		return;
 
@@ -136,8 +136,8 @@ static void __init imx7ulp_clk_pcc2_init(struct device_node *np)
 	struct clk_hw **clks;
 	void __iomem *base;
 
-	clk_data = kzalloc(sizeof(*clk_data) + sizeof(*clk_data->hws) *
-			   IMX7ULP_CLK_PCC2_END, GFP_KERNEL);
+	clk_data = kzalloc(struct_size(clk_data, hws, IMX7ULP_CLK_PCC2_END),
+			   GFP_KERNEL);
 	if (!clk_data)
 		return;
 
@@ -183,8 +183,8 @@ static void __init imx7ulp_clk_pcc3_init(struct device_node *np)
 	struct clk_hw **clks;
 	void __iomem *base;
 
-	clk_data = kzalloc(sizeof(*clk_data) + sizeof(*clk_data->hws) *
-			   IMX7ULP_CLK_PCC3_END, GFP_KERNEL);
+	clk_data = kzalloc(struct_size(clk_data, hws, IMX7ULP_CLK_PCC3_END),
+			   GFP_KERNEL);
 	if (!clk_data)
 		return;
 
@@ -228,8 +228,8 @@ static void __init imx7ulp_clk_smc1_init(struct device_node *np)
 	struct clk_hw **clks;
 	void __iomem *base;
 
-	clk_data = kzalloc(sizeof(*clk_data) + sizeof(*clk_data->hws) *
-			   IMX7ULP_CLK_SMC1_END, GFP_KERNEL);
+	clk_data = kzalloc(struct_size(clk_data, hws, IMX7ULP_CLK_SMC1_END),
+			   GFP_KERNEL);
 	if (!clk_data)
 		return;
 

drivers/clk/imx/clk-vf610.c

@@ -203,6 +203,7 @@ static void __init vf610_clocks_init(struct device_node *ccm_node)
 	np = of_find_compatible_node(NULL, NULL, "fsl,vf610-anatop");
 	anatop_base = of_iomap(np, 0);
 	BUG_ON(!anatop_base);
+	of_node_put(np);
 
 	np = ccm_node;
 	ccm_base = of_iomap(np, 0);

drivers/clk/mvebu/armada-370.c

@@ -175,8 +175,10 @@ static void __init a370_clk_init(struct device_node *np)
 
 	mvebu_coreclk_setup(np, &a370_coreclks);
 
-	if (cgnp)
+	if (cgnp) {
 		mvebu_clk_gating_setup(cgnp, a370_gating_desc);
+		of_node_put(cgnp);
+	}
 }
 CLK_OF_DECLARE(a370_clk, "marvell,armada-370-core-clock", a370_clk_init);
 

drivers/clk/mvebu/armada-xp.c

@@ -226,7 +226,9 @@ static void __init axp_clk_init(struct device_node *np)
 
 	mvebu_coreclk_setup(np, &axp_coreclks);
 
-	if (cgnp)
+	if (cgnp) {
 		mvebu_clk_gating_setup(cgnp, axp_gating_desc);
+		of_node_put(cgnp);
+	}
 }
 CLK_OF_DECLARE(axp_clk, "marvell,armada-xp-core-clock", axp_clk_init);

drivers/clk/mvebu/dove.c

@@ -188,10 +188,14 @@ static void __init dove_clk_init(struct device_node *np)
 
 	mvebu_coreclk_setup(np, &dove_coreclks);
 
-	if (ddnp)
+	if (ddnp) {
 		dove_divider_clk_init(ddnp);
+		of_node_put(ddnp);
+	}
 
-	if (cgnp)
+	if (cgnp) {
 		mvebu_clk_gating_setup(cgnp, dove_gating_desc);
+		of_node_put(cgnp);
+	}
 }
 CLK_OF_DECLARE(dove_clk, "marvell,dove-core-clock", dove_clk_init);

drivers/clk/mvebu/kirkwood.c

@@ -331,6 +331,8 @@ static void __init kirkwood_clk_init(struct device_node *np)
 	if (cgnp) {
 		mvebu_clk_gating_setup(cgnp, kirkwood_gating_desc);
 		kirkwood_clk_muxing_setup(cgnp, kirkwood_mux_desc);
+
+		of_node_put(cgnp);
 	}
 }
 CLK_OF_DECLARE(kirkwood_clk, "marvell,kirkwood-core-clock",

drivers/clk/mvebu/mv98dx3236.c

@@ -172,7 +172,9 @@ static void __init mv98dx3236_clk_init(struct device_node *np)
 
 	mvebu_coreclk_setup(np, &mv98dx3236_core_clocks);
 
-	if (cgnp)
+	if (cgnp) {
 		mvebu_clk_gating_setup(cgnp, mv98dx3236_gating_desc);
+		of_node_put(cgnp);
+	}
 }
 CLK_OF_DECLARE(mv98dx3236_clk, "marvell,mv98dx3236-core-clock", mv98dx3236_clk_init);

drivers/clk/samsung/clk-exynos4.c

@@ -1028,6 +1028,7 @@ static unsigned long __init exynos4_get_xom(void)
 			xom = readl(chipid_base + 8);
 
 		iounmap(chipid_base);
+		of_node_put(np);
 	}
 
 	return xom;

drivers/clk/socfpga/clk-gate.c

@@ -176,8 +176,7 @@ static struct clk_ops gateclk_ops = {
 	.set_parent = socfpga_clk_set_parent,
 };
 
-static void __init __socfpga_gate_init(struct device_node *node,
-	const struct clk_ops *ops)
+void __init socfpga_gate_init(struct device_node *node)
 {
 	u32 clk_gate[2];
 	u32 div_reg[3];
@@ -188,12 +187,17 @@ static void __init __socfpga_gate_init(struct device_node *node,
 	const char *clk_name = node->name;
 	const char *parent_name[SOCFPGA_MAX_PARENTS];
 	struct clk_init_data init;
+	struct clk_ops *ops;
 	int rc;
 
 	socfpga_clk = kzalloc(sizeof(*socfpga_clk), GFP_KERNEL);
 	if (WARN_ON(!socfpga_clk))
 		return;
 
+	ops = kmemdup(&gateclk_ops, sizeof(gateclk_ops), GFP_KERNEL);
+	if (WARN_ON(!ops))
+		return;
+
 	rc = of_property_read_u32_array(node, "clk-gate", clk_gate, 2);
 	if (rc)
 		clk_gate[0] = 0;
@@ -202,8 +206,8 @@ static void __init __socfpga_gate_init(struct device_node *node,
 		socfpga_clk->hw.reg = clk_mgr_base_addr + clk_gate[0];
 		socfpga_clk->hw.bit_idx = clk_gate[1];
 
-		gateclk_ops.enable = clk_gate_ops.enable;
-		gateclk_ops.disable = clk_gate_ops.disable;
+		ops->enable = clk_gate_ops.enable;
+		ops->disable = clk_gate_ops.disable;
 	}
 
 	rc = of_property_read_u32(node, "fixed-divider", &fixed_div);
@@ -234,6 +238,11 @@ static void __init __socfpga_gate_init(struct device_node *node,
 	init.flags = 0;
 
 	init.num_parents = of_clk_parent_fill(node, parent_name, SOCFPGA_MAX_PARENTS);
+	if (init.num_parents < 2) {
+		ops->get_parent = NULL;
+		ops->set_parent = NULL;
+	}
+
 	init.parent_names = parent_name;
 	socfpga_clk->hw.hw.init = &init;
 
@@ -246,8 +255,3 @@ static void __init __socfpga_gate_init(struct device_node *node,
 	if (WARN_ON(rc))
 		return;
 }
-
-void __init socfpga_gate_init(struct device_node *node)
-{
-	__socfpga_gate_init(node, &gateclk_ops);
-}

drivers/clk/socfpga/clk-pll-a10.c

@@ -95,6 +95,7 @@ static struct clk * __init __socfpga_pll_init(struct device_node *node,
 
 	clkmgr_np = of_find_compatible_node(NULL, NULL, "altr,clk-mgr");
 	clk_mgr_a10_base_addr = of_iomap(clkmgr_np, 0);
+	of_node_put(clkmgr_np);
 	BUG_ON(!clk_mgr_a10_base_addr);
 	pll_clk->hw.reg = clk_mgr_a10_base_addr + reg;
 

drivers/clk/socfpga/clk-pll.c

@@ -100,6 +100,7 @@ static __init struct clk *__socfpga_pll_init(struct device_node *node,
 
 	clkmgr_np = of_find_compatible_node(NULL, NULL, "altr,clk-mgr");
 	clk_mgr_base_addr = of_iomap(clkmgr_np, 0);
+	of_node_put(clkmgr_np);
 	BUG_ON(!clk_mgr_base_addr);
 	pll_clk->hw.reg = clk_mgr_base_addr + reg;
 

drivers/clk/ti/clk.c

@@ -191,9 +191,13 @@ void __init ti_dt_clocks_register(struct ti_dt_clk oclks[])
 			clkdev_add(&c->lk);
 		} else {
 			if (num_args && !has_clkctrl_data) {
-				if (of_find_compatible_node(NULL, NULL,
-							    "ti,clkctrl")) {
+				struct device_node *np;
+
+				np = of_find_compatible_node(NULL, NULL,
+							     "ti,clkctrl");
+				if (np) {
 					has_clkctrl_data = true;
+					of_node_put(np);
 				} else {
 					clkctrl_nodes_missing = true;