Merge tag 'clk-v5.16-samsung' of https://git.kernel.org/pub/scm/linux/kernel/git/snawrocki/clk into clk-samsung

Pull Samsung clk driver updates from Sylwester Nawrocki:

 - Initial clock driver for the Exynos850 SoC
 - Refactoring of the CPU clock code and conversion of Exynos5433
   CPU clock driver to the platform driver
 - A few conversions to devm_platform_ioremap_resource()
 - Updates of the Samsung Kconfig help text

* tag 'clk-v5.16-samsung' of https://git.kernel.org/pub/scm/linux/kernel/git/snawrocki/clk:
  clk: samsung: describe drivers in Kconfig
  clk: samsung: exynos5433: update apollo and atlas clock probing
  clk: samsung: add support for CPU clocks
  clk: samsung: Introduce Exynos850 clock driver
  dt-bindings: clock: Document Exynos850 CMU bindings
  dt-bindings: clock: Add bindings definitions for Exynos850 CMU
  clk: samsung: clk-pll: Implement pll0831x PLL type
  clk: samsung: clk-pll: Implement pll0822x PLL type
  clk: samsung: s5pv210-audss: Make use of devm_platform_ioremap_resource()
  clk: samsung: exynos5433: Make use of devm_platform_ioremap_resource()
  clk: samsung: exynos4412-isp: Make use of devm_platform_ioremap_resource()
  clk: samsung: exynos-audss: Make use of devm_platform_ioremap_resource()

Author: bebarino

Documentation/devicetree/bindings/clock/samsung,exynos850-clock.yaml

@@ -0,0 +1,185 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/samsung,exynos850-clock.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Samsung Exynos850 SoC clock controller
+
+maintainers:
+  - Sam Protsenko <[email protected]>
+  - Chanwoo Choi <[email protected]>
+  - Krzysztof Kozlowski <[email protected]>
+  - Sylwester Nawrocki <[email protected]>
+  - Tomasz Figa <[email protected]>
+
+description: |
+  Exynos850 clock controller is comprised of several CMU units, generating
+  clocks for different domains. Those CMU units are modeled as separate device
+  tree nodes, and might depend on each other. Root clocks in that clock tree are
+  two external clocks:: OSCCLK (26 MHz) and RTCCLK (32768 Hz). Those external
+  clocks must be defined as fixed-rate clocks in dts.
+
+  CMU_TOP is a top-level CMU, where all base clocks are prepared using PLLs and
+  dividers; all other leaf clocks (other CMUs) are usually derived from CMU_TOP.
+
+  Each clock is assigned an identifier and client nodes can use this identifier
+  to specify the clock which they consume. All clocks available for usage
+  in clock consumer nodes are defined as preprocessor macros in
+  'dt-bindings/clock/exynos850.h' header.
+
+properties:
+  compatible:
+    enum:
+      - samsung,exynos850-cmu-top
+      - samsung,exynos850-cmu-core
+      - samsung,exynos850-cmu-dpu
+      - samsung,exynos850-cmu-hsi
+      - samsung,exynos850-cmu-peri
+
+  clocks:
+    minItems: 1
+    maxItems: 5
+
+  clock-names:
+    minItems: 1
+    maxItems: 5
+
+  "#clock-cells":
+    const: 1
+
+  reg:
+    maxItems: 1
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: samsung,exynos850-cmu-top
+
+    then:
+      properties:
+        clocks:
+          items:
+            - description: External reference clock (26 MHz)
+
+        clock-names:
+          items:
+            - const: oscclk
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: samsung,exynos850-cmu-core
+
+    then:
+      properties:
+        clocks:
+          items:
+            - description: External reference clock (26 MHz)
+            - description: CMU_CORE bus clock (from CMU_TOP)
+            - description: CCI clock (from CMU_TOP)
+            - description: eMMC clock (from CMU_TOP)
+            - description: SSS clock (from CMU_TOP)
+
+        clock-names:
+          items:
+            - const: oscclk
+            - const: dout_core_bus
+            - const: dout_core_cci
+            - const: dout_core_mmc_embd
+            - const: dout_core_sss
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: samsung,exynos850-cmu-dpu
+
+    then:
+      properties:
+        clocks:
+          items:
+            - description: External reference clock (26 MHz)
+            - description: DPU clock (from CMU_TOP)
+
+        clock-names:
+          items:
+            - const: oscclk
+            - const: dout_dpu
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: samsung,exynos850-cmu-hsi
+
+    then:
+      properties:
+        clocks:
+          items:
+            - description: External reference clock (26 MHz)
+            - description: External RTC clock (32768 Hz)
+            - description: CMU_HSI bus clock (from CMU_TOP)
+            - description: SD card clock (from CMU_TOP)
+            - description: "USB 2.0 DRD clock (from CMU_TOP)"
+
+        clock-names:
+          items:
+            - const: oscclk
+            - const: rtcclk
+            - const: dout_hsi_bus
+            - const: dout_hsi_mmc_card
+            - const: dout_hsi_usb20drd
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: samsung,exynos850-cmu-peri
+
+    then:
+      properties:
+        clocks:
+          items:
+            - description: External reference clock (26 MHz)
+            - description: CMU_PERI bus clock (from CMU_TOP)
+            - description: UART clock (from CMU_TOP)
+            - description: Parent clock for HSI2C and SPI (from CMU_TOP)
+
+        clock-names:
+          items:
+            - const: oscclk
+            - const: dout_peri_bus
+            - const: dout_peri_uart
+            - const: dout_peri_ip
+
+required:
+  - compatible
+  - "#clock-cells"
+  - clocks
+  - clock-names
+  - reg
+
+additionalProperties: false
+
+examples:
+  # Clock controller node for CMU_PERI
+  - |
+    #include <dt-bindings/clock/exynos850.h>
+
+    cmu_peri: clock-controller@10030000 {
+        compatible = "samsung,exynos850-cmu-peri";
+        reg = <0x10030000 0x8000>;
+        #clock-cells = <1>;
+
+        clocks = <&oscclk>, <&cmu_top CLK_DOUT_PERI_BUS>,
+                 <&cmu_top CLK_DOUT_PERI_UART>,
+                 <&cmu_top CLK_DOUT_PERI_IP>;
+        clock-names = "oscclk", "dout_peri_bus",
+                      "dout_peri_uart", "dout_peri_ip";
+    };
+
+...

drivers/clk/samsung/Kconfig

@@ -67,7 +67,8 @@ config EXYNOS_5420_COMMON_CLK
 	depends on COMMON_CLK_SAMSUNG
 	help
 	  Support for the clock controller present on the Samsung
-	  Exynos5420 SoCs. Choose Y here only if you build for this SoC.
+	  Exynos5420/Exynos5422/Exynos5800 SoCs. Choose Y here only if you
+	  build for this SoC.
 
 config EXYNOS_ARM64_COMMON_CLK
 	bool "Samsung Exynos ARMv8-family clock controller support" if COMPILE_TEST
@@ -79,38 +80,47 @@ config EXYNOS_AUDSS_CLK_CON
 	default y if ARCH_EXYNOS
 	help
 	  Support for the Audio Subsystem CLKCON clock controller present
-	  on some Exynos SoC variants. Choose M or Y here if you want to
-	  use audio devices such as I2S, PCM, etc.
+	  on some Samsung Exynos SoC variants. Choose M or Y here if you want
+	  to use audio devices such as I2S, PCM, etc.
 
 config EXYNOS_CLKOUT
 	tristate "Samsung Exynos clock output driver"
 	depends on COMMON_CLK_SAMSUNG
 	default y if ARCH_EXYNOS
 	help
-	  Support for the clock output (XCLKOUT) present on some of Exynos SoC
-	  variants. Usually the XCLKOUT is used to monitor the status of the
-	  certains clocks from SoC, but it could also be tied to other devices
-	  as an input clock.
+	  Support for the clock output (XCLKOUT) present on some of Samsung
+	  Exynos SoC variants. Usually the XCLKOUT is used to monitor the
+	  status of the certains clocks from SoC, but it could also be tied to
+	  other devices as an input clock.
 
 # For S3C24XX platforms, select following symbols:
 config S3C2410_COMMON_CLK
 	bool "Samsung S3C2410 clock controller support" if COMPILE_TEST
 	select COMMON_CLK_SAMSUNG
 	help
-	  Build the s3c2410 clock driver based on the common clock framework.
+	  Support for the clock controller present on the Samsung
+	  S3C2410/S3C2440/S3C2442 SoCs. Choose Y here only if you build for
+	  this SoC.
 
 config S3C2410_COMMON_DCLK
 	bool
 	select COMMON_CLK_SAMSUNG
 	select REGMAP_MMIO
 	help
-	  Temporary symbol to build the dclk driver based on the common clock
-	  framework.
+	  Support for the dclk clock controller present on the Samsung
+	  S3C2410/S3C2412/S3C2440/S3C2443 SoCs. Choose Y here only if you build
+	  for this SoC.
 
 config S3C2412_COMMON_CLK
 	bool "Samsung S3C2412 clock controller support" if COMPILE_TEST
 	select COMMON_CLK_SAMSUNG
+	help
+	  Support for the clock controller present on the Samsung S3C2412 SoCs.
+	  Choose Y here only if you build for this SoC.
 
 config S3C2443_COMMON_CLK
 	bool "Samsung S3C2443 clock controller support" if COMPILE_TEST
 	select COMMON_CLK_SAMSUNG
+	help
+	  Support for the clock controller present on the Samsung
+	  S3C2416/S3C2443 SoCs. Choose Y here only if you build for this SoC.

drivers/clk/samsung/Makefile

@@ -17,6 +17,7 @@ obj-$(CONFIG_EXYNOS_ARM64_COMMON_CLK)	+= clk-exynos5433.o
 obj-$(CONFIG_EXYNOS_AUDSS_CLK_CON) += clk-exynos-audss.o
 obj-$(CONFIG_EXYNOS_CLKOUT)	+= clk-exynos-clkout.o
 obj-$(CONFIG_EXYNOS_ARM64_COMMON_CLK)	+= clk-exynos7.o
+obj-$(CONFIG_EXYNOS_ARM64_COMMON_CLK)	+= clk-exynos850.o
 obj-$(CONFIG_S3C2410_COMMON_CLK)+= clk-s3c2410.o
 obj-$(CONFIG_S3C2410_COMMON_DCLK)+= clk-s3c2410-dclk.o
 obj-$(CONFIG_S3C2412_COMMON_CLK)+= clk-s3c2412.o

drivers/clk/samsung/clk-cpu.c

@@ -469,3 +469,21 @@ int __init exynos_register_cpu_clock(struct samsung_clk_provider *ctx,
 	kfree(cpuclk);
 	return ret;
 }
+
+void __init samsung_clk_register_cpu(struct samsung_clk_provider *ctx,
+		const struct samsung_cpu_clock *list, unsigned int nr_clk)
+{
+	unsigned int idx;
+	unsigned int num_cfgs;
+	struct clk_hw **hws = ctx->clk_data.hws;
+
+	for (idx = 0; idx < nr_clk; idx++, list++) {
+		/* find count of configuration rates in cfg */
+		for (num_cfgs = 0; list->cfg[num_cfgs].prate != 0; )
+			num_cfgs++;
+
+		exynos_register_cpu_clock(ctx, list->id, list->name, hws[list->parent_id],
+				hws[list->alt_parent_id], list->offset, list->cfg, num_cfgs,
+				list->flags);
+	}
+}

drivers/clk/samsung/clk-exynos-audss.c

@@ -129,16 +129,14 @@ static int exynos_audss_clk_probe(struct platform_device *pdev)
 	struct clk *pll_ref, *pll_in, *cdclk, *sclk_audio, *sclk_pcm_in;
 	const struct exynos_audss_clk_drvdata *variant;
 	struct clk_hw **clk_table;
-	struct resource *res;
 	struct device *dev = &pdev->dev;
 	int i, ret = 0;
 
 	variant = of_device_get_match_data(&pdev->dev);
 	if (!variant)
 		return -EINVAL;
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	reg_base = devm_ioremap_resource(dev, res);
+	reg_base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(reg_base))
 		return PTR_ERR(reg_base);
 

drivers/clk/samsung/clk-exynos4412-isp.c

@@ -110,11 +110,9 @@ static int __init exynos4x12_isp_clk_probe(struct platform_device *pdev)
 	struct samsung_clk_provider *ctx;
 	struct device *dev = &pdev->dev;
 	struct device_node *np = dev->of_node;
-	struct resource *res;
 	void __iomem *reg_base;
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	reg_base = devm_ioremap_resource(dev, res);
+	reg_base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(reg_base))
 		return PTR_ERR(reg_base);