i.MX6 SoCs have MMDC driver which will access MMDC registers, and the register access need to have MMDC IPG clocks enabled, current MMDC driver does NOT handle the MMDC IPG clocks at all, most of the i.MX6 SoCs clock tree have MMDC0 IPG clock registered and have flag CLK_IS_CRITICAL set, but some i.MX6 SoCs does NOT register the MMDC IPG clock at all, it depends on default HW status which is NOT reliable. To make it more formal, this patch set add all available MMDC IPG clocks into clock tree, and add optional clocks enable operation in MMDC driver to make sure IPG clock is enabled before accessing registers, and passing MMDC IPG clock info from device tree MMDC node. In order to NOT break old device tree, this patch set does NOT remove the CLK_IS_CRITIAL flag for MMDC0 IPG clock. Anson Huang (7): ARM: imx: add mmdc ipg clock operation for mmdc clk: imx6ul: add mmdc1 ipg clock clk: imx6sx: add mmdc1 ipg clock clk: imx6sll: add mmdc1 ipg clock clk: imx6sl: add mmdc ipg clocks clk: imx6q: add mmdc0 ipg clock ARM: dts: imx6: add mmdc ipg clock arch/arm/boot/dts/imx6qdl.dtsi | 1 + arch/arm/boot/dts/imx6sl.dtsi | 1 + arch/arm/boot/dts/imx6sll.dtsi | 1 + arch/arm/boot/dts/imx6sx.dtsi | 1 + arch/arm/boot/dts/imx6ul.dtsi | 1 + arch/arm/mach-imx/mmdc.c | 14 ++++++++++++++ drivers/clk/imx/clk-imx6q.c | 1 + drivers/clk/imx/clk-imx6sl.c | 2 ++ drivers/clk/imx/clk-imx6sll.c | 1 + drivers/clk/imx/clk-imx6sx.c | 1 + drivers/clk/imx/clk-imx6ul.c | 1 + include/dt-bindings/clock/imx6qdl-clock.h | 3 ++- include/dt-bindings/clock/imx6sl-clock.h | 4 +++- include/dt-bindings/clock/imx6sll-clock.h | 3 ++- include/dt-bindings/clock/imx6sx-clock.h | 3 ++- include/dt-bindings/clock/imx6ul-clock.h | 3 ++- 16 files changed, 36 insertions(+), 5 deletions(-) -- 2.7.4
