memory: mtk-smi: Add clocks for smi-sub-common

SMI sub common only have one output port. thus it has only one gals
clocks(gals0). then, smi-sub-common require the three clocks(apb/smi/gals0)
in has_gals case.
Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Link: https://lore.kernel.org/r/20210914113703.31466-9-yong.wu@mediatek.comSigned-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>

drivers/memory/mtk-smi.c

@@ -74,10 +74,12 @@ static const char * const mtk_smi_larb_clks[] = {"apb", "smi", "gals"};
 
 /*
  * common: Require these four clocks in has_gals case. Otherwise, only apb/smi are required.
+ * sub common: Require apb/smi/gals0 clocks in has_gals case. Otherwise, only apb/smi are required.
  */
 static const char * const mtk_smi_common_clks[] = {"apb", "smi", "gals0", "gals1"};
 #define MTK_SMI_COM_REQ_CLK_NR		2
 #define MTK_SMI_COM_GALS_REQ_CLK_NR	MTK_SMI_CLK_NR_MAX
+#define MTK_SMI_SUB_COM_GALS_REQ_CLK_NR 3
 
 struct mtk_smi_common_plat {
 	enum mtk_smi_type	type;
@@ -467,8 +469,12 @@ static int mtk_smi_common_probe(struct platform_device *pdev)
 	common->dev = dev;
 	common->plat = of_device_get_match_data(dev);
 
-	if (common->plat->has_gals)
+	if (common->plat->has_gals) {
+		if (common->plat->type == MTK_SMI_GEN2)
 			clk_required = MTK_SMI_COM_GALS_REQ_CLK_NR;
+		else if (common->plat->type == MTK_SMI_GEN2_SUB_COMM)
+			clk_required = MTK_SMI_SUB_COM_GALS_REQ_CLK_NR;
+	}
 	ret = mtk_smi_dts_clk_init(dev, common, mtk_smi_common_clks, clk_required, 0);
 	if (ret)
 		return ret;