clk/qcom: move from mach-snapdragon

Clock drivers don't belong here, move them to the right place and
declutter mach-snapdragon a bit.

To de-couple these drivers from specific "target" platforms, add
additional config options to enable each clock driver gated behind a
common CLK_QCOM option and enable them by default for the respective
targets. This will make future work easier as we move towards a generic
Qualcomm target.

Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>

MAINTAINERS

@@ -575,6 +575,7 @@ M:	Neil Armstrong <neil.armstrong@linaro.org>
 R:	Sumit Garg <sumit.garg@linaro.org>
 S:	Maintained
 F:	arch/arm/mach-snapdragon/
+F:	drivers/clk/qcom/
 F:	drivers/gpio/msm_gpio.c
 F:	drivers/mmc/msm_sdhci.c
 F:	drivers/phy/msm8916-usbh-phy.c

arch/arm/mach-snapdragon/Kconfig

@@ -15,6 +15,7 @@ config SPL_SYS_MALLOC_F_LEN
 config SDM845
 	bool "Qualcomm Snapdragon 845 SoC"
 	select LINUX_KERNEL_IMAGE_HEADER
+	imply CLK_QCOM_SDM845
 
 config LNX_KRNL_IMG_TEXT_OFFSET_BASE
 	default 0x80000000
@@ -26,6 +27,7 @@ config TARGET_DRAGONBOARD410C
 	bool "96Boards Dragonboard 410C"
 	select BOARD_LATE_INIT
 	select ENABLE_ARM_SOC_BOOT0_HOOK
+	imply CLK_QCOM_APQ8016
 	help
 	  Support for 96Boards Dragonboard 410C. This board complies with
 	  96Board Open Platform Specifications. Features:
@@ -39,6 +41,7 @@ config TARGET_DRAGONBOARD410C
 
 config TARGET_DRAGONBOARD820C
 	bool "96Boards Dragonboard 820C"
+	imply CLK_QCOM_APQ8096
 	help
 	  Support for 96Boards Dragonboard 820C. This board complies with
 	  96Board Open Platform Specifications. Features:
@@ -72,6 +75,7 @@ config TARGET_STARQLTECHN
 config TARGET_QCS404EVB
 	bool "Qualcomm Technologies, Inc. QCS404 EVB"
 	select LINUX_KERNEL_IMAGE_HEADER
+	imply CLK_QCOM_QCS404
 	help
 	  Support for Qualcomm Technologies, Inc. QCS404 evaluation board.
 	  Features:

arch/arm/mach-snapdragon/Makefile

@@ -2,20 +2,15 @@
 #
 # (C) Copyright 2015 Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
 
-obj-$(CONFIG_SDM845) += clock-sdm845.o
 obj-$(CONFIG_SDM845) += sysmap-sdm845.o
 obj-$(CONFIG_SDM845) += init_sdm845.o
-obj-$(CONFIG_TARGET_DRAGONBOARD820C) += clock-apq8096.o
 obj-$(CONFIG_TARGET_DRAGONBOARD820C) += sysmap-apq8096.o
-obj-$(CONFIG_TARGET_DRAGONBOARD410C) += clock-apq8016.o
 obj-$(CONFIG_TARGET_DRAGONBOARD410C) += sysmap-apq8016.o
 obj-y += misc.o
-obj-y += clock-snapdragon.o
 obj-y += dram.o
 obj-y += pinctrl-snapdragon.o
 obj-y += pinctrl-apq8016.o
 obj-y += pinctrl-apq8096.o
 obj-y += pinctrl-qcs404.o
 obj-y += pinctrl-sdm845.o
-obj-$(CONFIG_TARGET_QCS404EVB) += clock-qcs404.o
 obj-$(CONFIG_TARGET_QCS404EVB) += sysmap-qcs404.o

drivers/clk/Kconfig

@@ -254,6 +254,7 @@ source "drivers/clk/meson/Kconfig"
 source "drivers/clk/microchip/Kconfig"
 source "drivers/clk/mvebu/Kconfig"
 source "drivers/clk/owl/Kconfig"
+source "drivers/clk/qcom/Kconfig"
 source "drivers/clk/renesas/Kconfig"
 source "drivers/clk/sunxi/Kconfig"
 source "drivers/clk/sifive/Kconfig"

drivers/clk/Makefile

@@ -39,6 +39,7 @@ obj-$(CONFIG_CLK_MPFS) += microchip/
 obj-$(CONFIG_CLK_MVEBU) += mvebu/
 obj-$(CONFIG_CLK_OCTEON) += clk_octeon.o
 obj-$(CONFIG_CLK_OWL) += owl/
+obj-$(CONFIG_CLK_QCOM) += qcom/
 obj-$(CONFIG_CLK_RENESAS) += renesas/
 obj-$(CONFIG_$(SPL_TPL_)CLK_SCMI) += clk_scmi.o
 obj-$(CONFIG_CLK_SIFIVE) += sifive/

drivers/clk/qcom/Kconfig

@@ -0,0 +1,44 @@
+if ARCH_SNAPDRAGON || ARCH_IPQ40XX
+
+config CLK_QCOM
+	bool
+	depends on CLK && DM_RESET
+	def_bool n
+
+menu "Qualcomm clock drivers"
+
+config CLK_QCOM_APQ8016
+	bool "Qualcomm APQ8016 GCC"
+	select CLK_QCOM
+	help
+	  Say Y here to enable support for the Global Clock Controller
+	  on the Snapdragon APQ8016 SoC. This driver supports the clocks
+	  and resets exposed by the GCC hardware block.
+
+config CLK_QCOM_APQ8096
+	bool "Qualcomm APQ8096 GCC"
+	select CLK_QCOM
+	help
+	  Say Y here to enable support for the Global Clock Controller
+	  on the Snapdragon APQ8096 SoC. This driver supports the clocks
+	  and resets exposed by the GCC hardware block.
+
+config CLK_QCOM_QCS404
+	bool "Qualcomm QCS404 GCC"
+	select CLK_QCOM
+	help
+	  Say Y here to enable support for the Global Clock Controller
+	  on the Snapdragon QCS404 SoC. This driver supports the clocks
+	  and resets exposed by the GCC hardware block.
+
+config CLK_QCOM_SDM845
+	bool "Qualcomm SDM845 GCC"
+	select CLK_QCOM
+	help
+	  Say Y here to enable support for the Global Clock Controller
+	  on the Snapdragon 845 SoC. This driver supports the clocks
+	  and resets exposed by the GCC hardware block.
+
+endmenu
+
+endif

drivers/clk/qcom/Makefile

@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# (C) Copyright 2023 Linaro
+
+obj-y += clock-qcom.o
+obj-$(CONFIG_CLK_QCOM_SDM845) += clock-sdm845.o
+obj-$(CONFIG_CLK_QCOM_APQ8016) += clock-apq8016.o
+obj-$(CONFIG_CLK_QCOM_APQ8096) += clock-apq8096.o
+obj-$(CONFIG_CLK_QCOM_QCS404) += clock-qcs404.o

drivers/clk/qcom/clock-apq8016.c

@@ -13,7 +13,7 @@
 #include <errno.h>
 #include <asm/io.h>
 #include <linux/bitops.h>
-#include "clock-snapdragon.h"
+#include "clock-qcom.h"
 
 /* GPLL0 clock control registers */
 #define GPLL0_STATUS_ACTIVE BIT(17)

drivers/clk/qcom/clock-apq8096.c

@@ -13,7 +13,8 @@
 #include <errno.h>
 #include <asm/io.h>
 #include <linux/bitops.h>
-#include "clock-snapdragon.h"
+
+#include "clock-qcom.h"
 
 /* GPLL0 clock control registers */
 #define GPLL0_STATUS_ACTIVE		BIT(30)

drivers/clk/qcom/clock-qcom.c

@@ -13,7 +13,7 @@
 #include <errno.h>
 #include <asm/io.h>
 #include <linux/bitops.h>
-#include "clock-snapdragon.h"
+#include "clock-qcom.h"
 
 /* CBCR register fields */
 #define CBCR_BRANCH_ENABLE_BIT  BIT(0)

drivers/clk/qcom/clock-qcs404.c

@@ -11,7 +11,7 @@
 #include <errno.h>
 #include <asm/io.h>
 #include <linux/bitops.h>
-#include "clock-snapdragon.h"
+#include "clock-qcom.h"
 
 #include <dt-bindings/clock/qcom,gcc-qcs404.h>
 

drivers/clk/qcom/clock-sdm845.c

@@ -15,7 +15,7 @@
 #include <asm/io.h>
 #include <linux/bitops.h>
 #include <dt-bindings/clock/qcom,gcc-sdm845.h>
-#include "clock-snapdragon.h"
+#include "clock-qcom.h"
 
 #define F(f, s, h, m, n) { (f), (s), (2 * (h) - 1), (m), (n) }