clk: renesas: Rework Kconfig and Makefile logic

The goals are to:
  - Allow precise control over and automatic selection of which
    (sub)drivers are used for which SoC (which may change in the
    future),
  - Allow adding support for new SoCs easily,
  - Allow compile-testing of all (sub)drivers,
  - Keep driver selection logic in the subsystem-specific Kconfig,
    independent from the architecture-specific Kconfig (i.e. no "select"
    from arch/arm64/Kconfig.platforms), to avoid dependencies.

This is implemented by:
  - Introducing Kconfig symbols for all drivers and sub-drivers,
  - Introducing the Kconfig symbol CLK_RENESAS, which is enabled
    automatically when building for a Renesas ARM platform, and which
    enables all required drivers without interaction of the user, based
    on SoC-specific ARCH_* symbols,
  - Allowing the user to enable any Kconfig symbol manually if
    COMPILE_TEST is enabled,
  - Using the new Kconfig symbols instead of the ARCH_* symbols to
    control compilation in the Makefile,
  - Always entering drivers/clk/renesas/ during the build.

Note that currently not all (sub)drivers are enabled for
compile-testing, as they depend on independent fixes in other
subsystems.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>

diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index c19983a..8ea0c55 100644 (file)
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -75,7 +75,7 @@ obj-$(CONFIG_COMMON_CLK_NXP)          += nxp/
 obj-$(CONFIG_MACH_PISTACHIO)           += pistachio/
 obj-$(CONFIG_COMMON_CLK_PXA)           += pxa/
 obj-$(CONFIG_COMMON_CLK_QCOM)          += qcom/
-obj-$(CONFIG_ARCH_RENESAS)             += renesas/
+obj-y                                  += renesas/
 obj-$(CONFIG_ARCH_ROCKCHIP)            += rockchip/
 obj-$(CONFIG_COMMON_CLK_SAMSUNG)       += samsung/
 obj-$(CONFIG_ARCH_SIRF)                        += sirf/

diff --git a/drivers/clk/renesas/Kconfig b/drivers/clk/renesas/Kconfig
index 2586dfa..9c8b44d 100644 (file)
--- a/drivers/clk/renesas/Kconfig
+++ b/drivers/clk/renesas/Kconfig
@@ -1,20 +1,115 @@
+config CLK_RENESAS
+       bool "Renesas SoC clock support" if COMPILE_TEST && !ARCH_RENESAS
+       default y if ARCH_RENESAS
+       select CLK_EMEV2 if ARCH_EMEV2
+       select CLK_RZA1 if ARCH_R7S72100
+       select CLK_R8A73A4 if ARCH_R8A73A4
+       select CLK_R8A7740 if ARCH_R8A7740
+       select CLK_R8A7743 if ARCH_R8A7743
+       select CLK_R8A7745 if ARCH_R8A7745
+       select CLK_R8A7778 if ARCH_R8A7778
+       select CLK_R8A7779 if ARCH_R8A7779
+       select CLK_R8A7790 if ARCH_R8A7790
+       select CLK_R8A7791 if ARCH_R8A7791 || ARCH_R8A7793
+       select CLK_R8A7792 if ARCH_R8A7792
+       select CLK_R8A7794 if ARCH_R8A7794
+       select CLK_R8A7795 if ARCH_R8A7795
+       select CLK_R8A7796 if ARCH_R8A7796
+       select CLK_SH73A0 if ARCH_SH73A0
+
+if CLK_RENESAS
+
+# SoC
+config CLK_EMEV2
+       bool "Emma Mobile EV2 clock support" if COMPILE_TEST
+
+config CLK_RZA1
+       bool
+       select CLK_RENESAS_CPG_MSTP
+
+config CLK_R8A73A4
+       bool
+       select CLK_RENESAS_CPG_MSTP
+       select CLK_RENESAS_DIV6
+
+config CLK_R8A7740
+       bool
+       select CLK_RENESAS_CPG_MSTP
+       select CLK_RENESAS_DIV6
+
+config CLK_R8A7743
+       bool
+       select CLK_RCAR_GEN2_CPG
+
+config CLK_R8A7745
+       bool
+       select CLK_RCAR_GEN2_CPG
+
+config CLK_R8A7778
+       bool
+       select CLK_RENESAS_CPG_MSTP
+
+config CLK_R8A7779
+       bool
+       select CLK_RENESAS_CPG_MSTP
+
+config CLK_R8A7790
+       bool
+       select CLK_RCAR_GEN2
+       select CLK_RENESAS_DIV6
+
+config CLK_R8A7791
+       bool
+       select CLK_RCAR_GEN2
+       select CLK_RENESAS_DIV6
+
+config CLK_R8A7792
+       bool
+       select CLK_RCAR_GEN2
+
+config CLK_R8A7794
+       bool
+       select CLK_RCAR_GEN2
+       select CLK_RENESAS_DIV6
+
+config CLK_R8A7795
+       bool
+       select CLK_RCAR_GEN3_CPG
+
+config CLK_R8A7796
+       bool
+       select CLK_RCAR_GEN3_CPG
+
+config CLK_SH73A0
+       bool
+       select CLK_RENESAS_CPG_MSTP
+       select CLK_RENESAS_DIV6
+
+
+# Family
+config CLK_RCAR_GEN2
+       bool
+       select CLK_RENESAS_CPG_MSTP
+       select CLK_RENESAS_DIV6
+
+config CLK_RCAR_GEN2_CPG
+       bool
+       select CLK_RENESAS_CPG_MSSR
+
+config CLK_RCAR_GEN3_CPG
+       bool
+       select CLK_RENESAS_CPG_MSSR
+
+
+# Generic
 config CLK_RENESAS_CPG_MSSR
        bool
-       default y if ARCH_R8A7743
-       default y if ARCH_R8A7745
-       default y if ARCH_R8A7795
-       default y if ARCH_R8A7796
+       select CLK_RENESAS_DIV6
 
 config CLK_RENESAS_CPG_MSTP
        bool
-       default y if ARCH_R7S72100
-       default y if ARCH_R8A73A4
-       default y if ARCH_R8A7740
-       default y if ARCH_R8A7778
-       default y if ARCH_R8A7779
-       default y if ARCH_R8A7790
-       default y if ARCH_R8A7791
-       default y if ARCH_R8A7792
-       default y if ARCH_R8A7793
-       default y if ARCH_R8A7794
-       default y if ARCH_SH73A0
+
+config CLK_RENESAS_DIV6
+       bool "DIV6 clock support" if COMPILE_TEST
+
+endif # CLK_RENESAS

diff --git a/drivers/clk/renesas/Makefile b/drivers/clk/renesas/Makefile
index 5b8fccf..aa24c2f 100644 (file)
--- a/drivers/clk/renesas/Makefile
+++ b/drivers/clk/renesas/Makefile
@@ -1,19 +1,22 @@
-obj-$(CONFIG_ARCH_EMEV2)               += clk-emev2.o
-obj-$(CONFIG_ARCH_R7S72100)            += clk-rz.o
-obj-$(CONFIG_ARCH_R8A73A4)             += clk-r8a73a4.o clk-div6.o
-obj-$(CONFIG_ARCH_R8A7740)             += clk-r8a7740.o clk-div6.o
-obj-$(CONFIG_ARCH_R8A7743)             += r8a7743-cpg-mssr.o rcar-gen2-cpg.o
-obj-$(CONFIG_ARCH_R8A7745)             += r8a7745-cpg-mssr.o rcar-gen2-cpg.o
-obj-$(CONFIG_ARCH_R8A7778)             += clk-r8a7778.o
-obj-$(CONFIG_ARCH_R8A7779)             += clk-r8a7779.o
-obj-$(CONFIG_ARCH_R8A7790)             += clk-rcar-gen2.o clk-div6.o
-obj-$(CONFIG_ARCH_R8A7791)             += clk-rcar-gen2.o clk-div6.o
-obj-$(CONFIG_ARCH_R8A7792)             += clk-rcar-gen2.o
-obj-$(CONFIG_ARCH_R8A7793)             += clk-rcar-gen2.o clk-div6.o
-obj-$(CONFIG_ARCH_R8A7794)             += clk-rcar-gen2.o clk-div6.o
-obj-$(CONFIG_ARCH_R8A7795)             += r8a7795-cpg-mssr.o rcar-gen3-cpg.o
-obj-$(CONFIG_ARCH_R8A7796)             += r8a7796-cpg-mssr.o rcar-gen3-cpg.o
-obj-$(CONFIG_ARCH_SH73A0)              += clk-sh73a0.o clk-div6.o
+# SoC
+obj-$(CONFIG_CLK_EMEV2)                        += clk-emev2.o
+obj-$(CONFIG_CLK_RZA1)                 += clk-rz.o
+obj-$(CONFIG_CLK_R8A73A4)              += clk-r8a73a4.o
+obj-$(CONFIG_CLK_R8A7740)              += clk-r8a7740.o
+obj-$(CONFIG_CLK_R8A7743)              += r8a7743-cpg-mssr.o
+obj-$(CONFIG_CLK_R8A7745)              += r8a7745-cpg-mssr.o
+obj-$(CONFIG_CLK_R8A7778)              += clk-r8a7778.o
+obj-$(CONFIG_CLK_R8A7779)              += clk-r8a7779.o
+obj-$(CONFIG_CLK_R8A7795)              += r8a7795-cpg-mssr.o
+obj-$(CONFIG_CLK_R8A7796)              += r8a7796-cpg-mssr.o
+obj-$(CONFIG_CLK_SH73A0)               += clk-sh73a0.o
 
-obj-$(CONFIG_CLK_RENESAS_CPG_MSSR)     += renesas-cpg-mssr.o clk-div6.o
+# Family
+obj-$(CONFIG_CLK_RCAR_GEN2)            += clk-rcar-gen2.o
+obj-$(CONFIG_CLK_RCAR_GEN2_CPG)                += rcar-gen2-cpg.o
+obj-$(CONFIG_CLK_RCAR_GEN3_CPG)                += rcar-gen3-cpg.o
+
+# Generic
+obj-$(CONFIG_CLK_RENESAS_CPG_MSSR)     += renesas-cpg-mssr.o
 obj-$(CONFIG_CLK_RENESAS_CPG_MSTP)     += clk-mstp.o
+obj-$(CONFIG_CLK_RENESAS_DIV6)         += clk-div6.o

diff --git a/drivers/clk/renesas/renesas-cpg-mssr.c b/drivers/clk/renesas/renesas-cpg-mssr.c
index 51d4af0..9ebe0be 100644 (file)
--- a/drivers/clk/renesas/renesas-cpg-mssr.c
+++ b/drivers/clk/renesas/renesas-cpg-mssr.c
@@ -627,25 +627,25 @@ static inline int cpg_mssr_reset_controller_register(struct cpg_mssr_priv *priv)
 
 
 static const struct of_device_id cpg_mssr_match[] = {
-#ifdef CONFIG_ARCH_R8A7743
+#ifdef CONFIG_CLK_R8A7743
        {
                .compatible = "renesas,r8a7743-cpg-mssr",
                .data = &r8a7743_cpg_mssr_info,
        },
 #endif
-#ifdef CONFIG_ARCH_R8A7745
+#ifdef CONFIG_CLK_R8A7745
        {
                .compatible = "renesas,r8a7745-cpg-mssr",
                .data = &r8a7745_cpg_mssr_info,
        },
 #endif
-#ifdef CONFIG_ARCH_R8A7795
+#ifdef CONFIG_CLK_R8A7795
        {
                .compatible = "renesas,r8a7795-cpg-mssr",
                .data = &r8a7795_cpg_mssr_info,
        },
 #endif
-#ifdef CONFIG_ARCH_R8A7796
+#ifdef CONFIG_CLK_R8A7796
        {
                .compatible = "renesas,r8a7796-cpg-mssr",
                .data = &r8a7796_cpg_mssr_info,