Merge tag 'imx-clk-5.6' of...

Merge tag 'imx-clk-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into clk-imx

Pull i.MX clk driver updates from Shawn Guo:

 - A series from Abel Vesa to do some trivial cleanups which will be
   helpful for i.MX clock driver switching to clk_hw based API
 - A series from Anson Huang to add i.MX8MP clock driver support
 - Disable non-functional divider between pll4_audio_div and
   pll4_post_div on imx6q
 - Fix watchdog2 clock name typo in imx7ulp clock driver
 - A couple of patches from Leonard Crestez to set CLK_GET_RATE_NOCACHE
   flag for DRAM related clocks on i.MX8M SoCs
 - Suppress bind attrs for i.MX8M clock driver to avoid the possibility
   of reloading the driver at runtime
 - Add a big comment in imx8qxp-lpcg driver to tell why
   devm_platform_ioremap_resource() shouldn't be used for the driver
 - A correction on i.MX8MN usb1_ctrl parent clock setting
 - A couple of trivial cleanup on clk-divider-gate driver
 - A series from Peng Fan to convert i.MX8M clock drivers to clk_hw
   based API

* tag 'imx-clk-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux: (32 commits)
  clk: imx: Add support for i.MX8MP clock driver
  dt-bindings: imx: Add clock binding doc for i.MX8MP
  clk: imx: gate4: Switch imx_clk_gate4_flags() to clk_hw based API
  clk: imx: imx8mq: Switch to clk_hw based API
  clk: imx: imx8mm: Switch to clk_hw based API
  clk: imx: imx8mn: Switch to clk_hw based API
  clk: imx: Remove __init for imx_obtain_fixed_clk_hw() API
  clk: imx: gate3: Switch to clk_hw based API
  clk: imx: add hw API imx_clk_hw_mux2_flags
  clk: imx: add imx_unregister_hw_clocks
  clk: imx: clk-composite-8m: Switch to clk_hw based API
  clk: imx: clk-pll14xx: Switch to clk_hw based API
  clk: imx7up: Rename the clks to hws
  clk: imx: Rename the imx_clk_divider_gate to imply it's clk_hw based
  clk: imx: Rename the imx_clk_pfdv2 to imply it's clk_hw based
  clk: imx: Rename the imx_clk_pllv4 to imply it's clk_hw based
  clk: imx: Rename sccg and frac pll register to suggest clk_hw
  clk: imx: imx7ulp composite: Rename to show is clk_hw based
  clk: imx: pllv2: Switch to clk_hw based API
  clk: imx: pllv1: Switch to clk_hw based API
  ...

Documentation/devicetree/bindings/clock/imx8mp-clock.yaml

+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/bindings/clock/imx8mp-clock.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP i.MX8M Plus Clock Control Module Binding
+
+maintainers:
+  - Anson Huang <Anson.Huang@nxp.com>
+
+description:
+  NXP i.MX8M Plus clock control module is an integrated clock controller, which
+  generates and supplies to all modules.
+
+properties:
+  compatible:
+    const: fsl,imx8mp-ccm
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: 32k osc
+      - description: 24m osc
+      - description: ext1 clock input
+      - description: ext2 clock input
+      - description: ext3 clock input
+      - description: ext4 clock input
+
+  clock-names:
+    items:
+      - const: osc_32k
+      - const: osc_24m
+      - const: clk_ext1
+      - const: clk_ext2
+      - const: clk_ext3
+      - const: clk_ext4
+
+  '#clock-cells':
+    const: 1
+    description:
+      The clock consumer should specify the desired clock by having the clock
+      ID in its "clocks" phandle cell. See include/dt-bindings/clock/imx8mp-clock.h
+      for the full list of i.MX8M Plus clock IDs.
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - '#clock-cells'
+
+examples:
+  # Clock Control Module node:
+  - |
+    clk: clock-controller@30380000 {
+        compatible = "fsl,imx8mp-ccm";
+        reg = <0x30380000 0x10000>;
+        #clock-cells = <1>;
+        clocks = <&osc_32k>, <&osc_24m>, <&clk_ext1>,
+                 <&clk_ext2>, <&clk_ext3>, <&clk_ext4>;
+        clock-names = "osc_32k", "osc_24m", "clk_ext1",
+                      "clk_ext2", "clk_ext3", "clk_ext4";
+    };
+
+...

drivers/clk/imx/Kconfig

@@ -20,6 +20,12 @@ config CLK_IMX8MN
 	help
 	    Build the driver for i.MX8MN CCM Clock Driver
 
+config CLK_IMX8MP
+	bool "IMX8MP CCM Clock Driver"
+	depends on ARCH_MXC && ARM64
+	help
+	    Build the driver for i.MX8MP CCM Clock Driver
+
 config CLK_IMX8MQ
 	bool "IMX8MQ CCM Clock Driver"
 	depends on ARCH_MXC && ARM64

drivers/clk/imx/Makefile

@@ -18,7 +18,7 @@ obj-$(CONFIG_MXC_CLK) += \
 	clk-pllv2.o \
 	clk-pllv3.o \
 	clk-pllv4.o \
-	clk-sccg-pll.o \
+	clk-sscg-pll.o \
 	clk-pll14xx.o
 
 obj-$(CONFIG_MXC_CLK_SCU) += \
@@ -27,6 +27,7 @@ obj-$(CONFIG_MXC_CLK_SCU) += \
 
 obj-$(CONFIG_CLK_IMX8MM) += clk-imx8mm.o
 obj-$(CONFIG_CLK_IMX8MN) += clk-imx8mn.o
+obj-$(CONFIG_CLK_IMX8MP) += clk-imx8mp.o
 obj-$(CONFIG_CLK_IMX8MQ) += clk-imx8mq.o
 obj-$(CONFIG_CLK_IMX8QXP) += clk-imx8qxp.o clk-imx8qxp-lpcg.o
 

drivers/clk/imx/clk-composite-7ulp.c

@@ -21,7 +21,7 @@
 #define PCG_PCD_WIDTH	3
 #define PCG_PCD_MASK	0x7
 
-struct clk_hw *imx7ulp_clk_composite(const char *name,
+struct clk_hw *imx7ulp_clk_hw_composite(const char *name,
 				     const char * const *parent_names,
 				     int num_parents, bool mux_present,
 				     bool rate_present, bool gate_present,

drivers/clk/imx/clk-composite-8m.c

@@ -123,7 +123,7 @@ static const struct clk_ops imx8m_clk_composite_divider_ops = {
 	.set_rate = imx8m_clk_composite_divider_set_rate,
 };
 
-struct clk *imx8m_clk_composite_flags(const char *name,
+struct clk_hw *imx8m_clk_hw_composite_flags(const char *name,
 					const char * const *parent_names,
 					int num_parents, void __iomem *reg,
 					unsigned long flags)
@@ -169,7 +169,7 @@ struct clk *imx8m_clk_composite_flags(const char *name,
 	if (IS_ERR(hw))
 		goto fail;
 
-	return hw->clk;
+	return hw;
 
 fail:
 	kfree(gate);

drivers/clk/imx/clk-divider-gate.c

@@ -43,7 +43,7 @@ static unsigned long clk_divider_gate_recalc_rate(struct clk_hw *hw,
 {
 	struct clk_divider_gate *div_gate = to_clk_divider_gate(hw);
 	struct clk_divider *div = to_clk_divider(hw);
-	unsigned long flags = 0;
+	unsigned long flags;
 	unsigned int val;
 
 	spin_lock_irqsave(div->lock, flags);
@@ -75,7 +75,7 @@ static int clk_divider_gate_set_rate(struct clk_hw *hw, unsigned long rate,
 {
 	struct clk_divider_gate *div_gate = to_clk_divider_gate(hw);
 	struct clk_divider *div = to_clk_divider(hw);
-	unsigned long flags = 0;
+	unsigned long flags;
 	int value;
 	u32 val;
 
@@ -104,7 +104,7 @@ static int clk_divider_enable(struct clk_hw *hw)
 {
 	struct clk_divider_gate *div_gate = to_clk_divider_gate(hw);
 	struct clk_divider *div = to_clk_divider(hw);
-	unsigned long flags = 0;
+	unsigned long flags;
 	u32 val;
 
 	if (!div_gate->cached_val) {
@@ -127,7 +127,7 @@ static void clk_divider_disable(struct clk_hw *hw)
 {
 	struct clk_divider_gate *div_gate = to_clk_divider_gate(hw);
 	struct clk_divider *div = to_clk_divider(hw);
-	unsigned long flags = 0;
+	unsigned long flags;
 	u32 val;
 
 	spin_lock_irqsave(div->lock, flags);
@@ -167,13 +167,13 @@ static const struct clk_ops clk_divider_gate_ops = {
 };
 
 /*
- * NOTE: In order to resue the most code from the common divider,
+ * NOTE: In order to reuse the most code from the common divider,
  * we also design our divider following the way that provids an extra
  * clk_divider_flags, however it's fixed to CLK_DIVIDER_ONE_BASED by
  * default as our HW is. Besides that it supports only CLK_DIVIDER_READ_ONLY
  * flag which can be specified by user flexibly.
  */
-struct clk_hw *imx_clk_divider_gate(const char *name, const char *parent_name,
+struct clk_hw *imx_clk_hw_divider_gate(const char *name, const char *parent_name,
 				    unsigned long flags, void __iomem *reg,
 				    u8 shift, u8 width, u8 clk_divider_flags,
 				    const struct clk_div_table *table,

drivers/clk/imx/clk-frac-pll.c

@@ -201,7 +201,8 @@ static const struct clk_ops clk_frac_pll_ops = {
 	.set_rate	= clk_pll_set_rate,
 };
 
-struct clk *imx_clk_frac_pll(const char *name, const char *parent_name,
+struct clk_hw *imx_clk_hw_frac_pll(const char *name,
+				   const char *parent_name,
 				   void __iomem *base)
 {
 	struct clk_init_data init;
@@ -230,5 +231,5 @@ struct clk *imx_clk_frac_pll(const char *name, const char *parent_name,
 		return ERR_PTR(ret);
 	}
 
-	return hw->clk;
+	return hw;
 }

drivers/clk/imx/clk-imx6q.c

@@ -598,6 +598,9 @@ static void __init imx6q_clocks_init(struct device_node *ccm_node)
 	}
 
 	hws[IMX6QDL_CLK_PLL4_POST_DIV] = clk_hw_register_divider_table(NULL, "pll4_post_div", "pll4_audio", CLK_SET_RATE_PARENT, base + 0x70, 19, 2, 0, post_div_table, &imx_ccm_lock);
+	if (clk_on_imx6q() || clk_on_imx6qp())
+		hws[IMX6QDL_CLK_PLL4_AUDIO_DIV] = imx_clk_hw_fixed_factor("pll4_audio_div", "pll4_post_div", 1, 1);
+	else
 		hws[IMX6QDL_CLK_PLL4_AUDIO_DIV] = clk_hw_register_divider(NULL, "pll4_audio_div", "pll4_post_div", CLK_SET_RATE_PARENT, base + 0x170, 15, 1, 0, &imx_ccm_lock);
 	hws[IMX6QDL_CLK_PLL5_POST_DIV] = clk_hw_register_divider_table(NULL, "pll5_post_div", "pll5_video", CLK_SET_RATE_PARENT, base + 0xa0, 19, 2, 0, post_div_table, &imx_ccm_lock);
 	hws[IMX6QDL_CLK_PLL5_VIDEO_DIV] = clk_hw_register_divider_table(NULL, "pll5_video_div", "pll5_post_div", CLK_SET_RATE_PARENT, base + 0x170, 30, 2, 0, video_div_table, &imx_ccm_lock);

drivers/clk/imx/clk-imx8qxp-lpcg.c

@@ -173,6 +173,17 @@ static int imx8qxp_lpcg_clk_probe(struct platform_device *pdev)
 	if (!ss_lpcg)
 		return -ENODEV;
 
+	/*
+	 * Please don't replace this with devm_platform_ioremap_resource.
+	 *
+	 * devm_platform_ioremap_resource calls devm_ioremap_resource which
+	 * differs from devm_ioremap by also calling devm_request_mem_region
+	 * and preventing other mappings in the same area.
+	 *
+	 * On imx8 the LPCG nodes map entire subsystems and overlap
+	 * peripherals, this means that using devm_platform_ioremap_resource
+	 * will cause many devices to fail to probe including serial ports.
+	 */
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!res)
 		return -EINVAL;

drivers/clk/imx/clk-pfdv2.c

@@ -166,7 +166,7 @@ static const struct clk_ops clk_pfdv2_ops = {
 	.is_enabled     = clk_pfdv2_is_enabled,
 };
 
-struct clk_hw *imx_clk_pfdv2(const char *name, const char *parent_name,
+struct clk_hw *imx_clk_hw_pfdv2(const char *name, const char *parent_name,
 			     void __iomem *reg, u8 idx)
 {
 	struct clk_init_data init;

drivers/clk/imx/clk-pll14xx.c

@@ -67,6 +67,13 @@ struct imx_pll14xx_clk imx_1443x_pll = {
 	.rate_count = ARRAY_SIZE(imx_pll1443x_tbl),
 };
 
+struct imx_pll14xx_clk imx_1443x_dram_pll = {
+	.type = PLL_1443X,
+	.rate_table = imx_pll1443x_tbl,
+	.rate_count = ARRAY_SIZE(imx_pll1443x_tbl),
+	.flags = CLK_GET_RATE_NOCACHE,
+};
+
 struct imx_pll14xx_clk imx_1416x_pll = {
 	.type = PLL_1416X,
 	.rate_table = imx_pll1416x_tbl,
@@ -369,13 +376,14 @@ static const struct clk_ops clk_pll1443x_ops = {
 	.set_rate	= clk_pll1443x_set_rate,
 };
 
-struct clk *imx_clk_pll14xx(const char *name, const char *parent_name,
+struct clk_hw *imx_clk_hw_pll14xx(const char *name, const char *parent_name,
 				  void __iomem *base,
 				  const struct imx_pll14xx_clk *pll_clk)
 {
 	struct clk_pll14xx *pll;
-	struct clk *clk;
+	struct clk_hw *hw;
 	struct clk_init_data init;
+	int ret;
 	u32 val;
 
 	pll = kzalloc(sizeof(*pll), GFP_KERNEL);
@@ -412,12 +420,15 @@ struct clk *imx_clk_pll14xx(const char *name, const char *parent_name,
 	val &= ~BYPASS_MASK;
 	writel_relaxed(val, pll->base + GNRL_CTL);
 
-	clk = clk_register(NULL, &pll->hw);
-	if (IS_ERR(clk)) {
-		pr_err("%s: failed to register pll %s %lu\n",
-			__func__, name, PTR_ERR(clk));
+	hw = &pll->hw;
+
+	ret = clk_hw_register(NULL, hw);
+	if (ret) {
+		pr_err("%s: failed to register pll %s %d\n",
+			__func__, name, ret);
 		kfree(pll);
+		return ERR_PTR(ret);
 	}
 
-	return clk;
+	return hw;
 }

drivers/clk/imx/clk-pllv1.c

@@ -111,12 +111,13 @@ static const struct clk_ops clk_pllv1_ops = {
 	.recalc_rate = clk_pllv1_recalc_rate,
 };
 
-struct clk *imx_clk_pllv1(enum imx_pllv1_type type, const char *name,
+struct clk_hw *imx_clk_hw_pllv1(enum imx_pllv1_type type, const char *name,
 		const char *parent, void __iomem *base)
 {
 	struct clk_pllv1 *pll;
-	struct clk *clk;
+	struct clk_hw *hw;
 	struct clk_init_data init;
+	int ret;
 
 	pll = kmalloc(sizeof(*pll), GFP_KERNEL);
 	if (!pll)
@@ -132,10 +133,13 @@ struct clk *imx_clk_pllv1(enum imx_pllv1_type type, const char *name,
 	init.num_parents = 1;
 
 	pll->hw.init = &init;
+	hw = &pll->hw;
 
-	clk = clk_register(NULL, &pll->hw);
-	if (IS_ERR(clk))
+	ret = clk_hw_register(NULL, hw);
+	if (ret) {
 		kfree(pll);
+		return ERR_PTR(ret);
+	}
 
-	return clk;
+	return hw;
 }

drivers/clk/imx/clk-pllv2.c

@@ -239,12 +239,13 @@ static const struct clk_ops clk_pllv2_ops = {
 	.set_rate = clk_pllv2_set_rate,
 };
 
-struct clk *imx_clk_pllv2(const char *name, const char *parent,
+struct clk_hw *imx_clk_hw_pllv2(const char *name, const char *parent,
 		void __iomem *base)
 {
 	struct clk_pllv2 *pll;
-	struct clk *clk;
+	struct clk_hw *hw;
 	struct clk_init_data init;
+	int ret;
 
 	pll = kzalloc(sizeof(*pll), GFP_KERNEL);
 	if (!pll)
@@ -259,10 +260,13 @@ struct clk *imx_clk_pllv2(const char *name, const char *parent,
 	init.num_parents = 1;
 
 	pll->hw.init = &init;
+	hw = &pll->hw;
 
-	clk = clk_register(NULL, &pll->hw);
-	if (IS_ERR(clk))
+	ret = clk_hw_register(NULL, hw);
+	if (ret) {
 		kfree(pll);
+		return ERR_PTR(ret);
+	}
 
-	return clk;
+	return hw;
 }

drivers/clk/imx/clk-pllv4.c

@@ -206,7 +206,7 @@ static const struct clk_ops clk_pllv4_ops = {
 	.is_enabled	= clk_pllv4_is_enabled,
 };
 
-struct clk_hw *imx_clk_pllv4(const char *name, const char *parent_name,
+struct clk_hw *imx_clk_hw_pllv4(const char *name, const char *parent_name,
 			  void __iomem *base)
 {
 	struct clk_pllv4 *pll;

drivers/clk/imx/clk.c

@@ -22,6 +22,14 @@ void imx_unregister_clocks(struct clk *clks[], unsigned int count)
 		clk_unregister(clks[i]);
 }
 
+void imx_unregister_hw_clocks(struct clk_hw *hws[], unsigned int count)
+{
+	unsigned int i;
+
+	for (i = 0; i < count; i++)
+		clk_hw_unregister(hws[i]);
+}
+
 void __init imx_mmdc_mask_handshake(void __iomem *ccm_base,
 				    unsigned int chn)
 {
@@ -94,7 +102,7 @@ struct clk_hw * __init imx_obtain_fixed_clock_hw(
 	return __clk_get_hw(clk);
 }
 
-struct clk_hw * __init imx_obtain_fixed_clk_hw(struct device_node *np,
+struct clk_hw * imx_obtain_fixed_clk_hw(struct device_node *np,
 					const char *name)
 {
 	struct clk *clk;