clk: qcom: Add driver for MSM8909 GCC

The Global Clock Controller (GCC) in the MSM8909 SoC provides clocks,
resets and power domains for the various hardware blocks in the SoC.
Add a driver for it to make it possible to enable additional
functionality for the SoC.

Work on this driver was originally started independently by Dominik,
I picked it up and added missing clocks/resets, as well as various
cleanup to bring it into shape for mainline.
Co-developed-by: Dominik Kobinski <dominikkobinski314@gmail.com>
Signed-off-by: Dominik Kobinski <dominikkobinski314@gmail.com>
Signed-off-by: Stephan Gerhold <stephan.gerhold@kernkonzept.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20220706134132.3623415-3-stephan.gerhold@kernkonzept.com

drivers/clk/qcom/Kconfig

@@ -180,6 +180,14 @@ config MSM_GCC_8660
 	  Say Y if you want to use peripheral devices such as UART, SPI,
 	  i2c, USB, SD/eMMC, etc.
 
+config MSM_GCC_8909
+	tristate "MSM8909 Global Clock Controller"
+	select QCOM_GDSC
+	help
+	  Support for the global clock controller on msm8909 devices.
+	  Say Y if you want to use devices such as UART, SPI, I2C, USB,
+	  SD/eMMC, display, graphics, camera etc.
+
 config MSM_GCC_8916
 	tristate "MSM8916 Global Clock Controller"
 	select QCOM_GDSC

drivers/clk/qcom/Makefile

@@ -32,6 +32,7 @@ obj-$(CONFIG_MDM_GCC_9607) += gcc-mdm9607.o
 obj-$(CONFIG_MDM_GCC_9615) += gcc-mdm9615.o
 obj-$(CONFIG_MDM_LCC_9615) += lcc-mdm9615.o
 obj-$(CONFIG_MSM_GCC_8660) += gcc-msm8660.o
+obj-$(CONFIG_MSM_GCC_8909) += gcc-msm8909.o
 obj-$(CONFIG_MSM_GCC_8916) += gcc-msm8916.o
 obj-$(CONFIG_MSM_GCC_8939) += gcc-msm8939.o
 obj-$(CONFIG_MSM_GCC_8953) += gcc-msm8953.o