clk: imx: imx7d: add the Keypad Port module clock

According to the i.MX7D Reference Manual, the Keypad Port module
(KPP) requires this clock gate to be enabled.
Signed-off-by: NStefan Agner <stefan@agner.ch>
Signed-off-by: NShawn Guo <shawnguo@kernel.org>

drivers/clk/imx/clk-imx7d.c

@@ -859,6 +859,7 @@ static void __init imx7d_clocks_init(struct device_node *ccm_node)
 	clks[IMX7D_WDOG2_ROOT_CLK] = imx_clk_gate4("wdog2_root_clk", "wdog_post_div", base + 0x49d0, 0);
 	clks[IMX7D_WDOG3_ROOT_CLK] = imx_clk_gate4("wdog3_root_clk", "wdog_post_div", base + 0x49e0, 0);
 	clks[IMX7D_WDOG4_ROOT_CLK] = imx_clk_gate4("wdog4_root_clk", "wdog_post_div", base + 0x49f0, 0);
+	clks[IMX7D_KPP_ROOT_CLK] = imx_clk_gate4("kpp_root_clk", "ipg_root_clk", base + 0x4aa0, 0);
 	clks[IMX7D_CSI_MCLK_ROOT_CLK] = imx_clk_gate4("csi_mclk_root_clk", "csi_mclk_post_div", base + 0x4490, 0);
 	clks[IMX7D_AUDIO_MCLK_ROOT_CLK] = imx_clk_gate4("audio_mclk_root_clk", "audio_mclk_post_div", base + 0x4790, 0);
 	clks[IMX7D_WRCLK_ROOT_CLK] = imx_clk_gate4("wrclk_root_clk", "wrclk_post_div", base + 0x47a0, 0);

include/dt-bindings/clock/imx7d-clock.h

@@ -454,5 +454,6 @@
 #define IMX7D_NAND_USDHC_BUS_RAWNAND_CLK 441
 #define IMX7D_SNVS_CLK			442
 #define IMX7D_CAAM_CLK			443
-#define IMX7D_CLK_END			444
+#define IMX7D_KPP_ROOT_CLK		444
+#define IMX7D_CLK_END			445
 #endif /* __DT_BINDINGS_CLOCK_IMX7D_H */