clk: imx: Update the pfdv2 for 8ulp specific support

On i.MX8ULP, the 'CLK_SET_RATE_PARENT' flag should NOT be
set and according to the laest RM, the PFD divider value range
seems will be changed in the future, so update the pfdv2 to
include the specific support for i.MX8ULP.

Signed-off-by: Jacky Bai <[email protected]>
Reviewed-by: Abel Vesa <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Abel Vesa <[email protected]>

Author: JackyBai

drivers/clk/imx/clk-imx7ulp.c

@@ -82,16 +82,16 @@ static void __init imx7ulp_clk_scg1_init(struct device_node *np)
 	hws[IMX7ULP_CLK_SPLL]		= imx_clk_hw_pllv4(IMX_PLLV4_IMX7ULP, "spll",  "spll_pre_div", base + 0x600);
 
 	/* APLL PFDs */
-	hws[IMX7ULP_CLK_APLL_PFD0]	= imx_clk_hw_pfdv2("apll_pfd0", "apll", base + 0x50c, 0);
-	hws[IMX7ULP_CLK_APLL_PFD1]	= imx_clk_hw_pfdv2("apll_pfd1", "apll", base + 0x50c, 1);
-	hws[IMX7ULP_CLK_APLL_PFD2]	= imx_clk_hw_pfdv2("apll_pfd2", "apll", base + 0x50c, 2);
-	hws[IMX7ULP_CLK_APLL_PFD3]	= imx_clk_hw_pfdv2("apll_pfd3", "apll", base + 0x50c, 3);
+	hws[IMX7ULP_CLK_APLL_PFD0]	= imx_clk_hw_pfdv2(IMX_PFDV2_IMX7ULP, "apll_pfd0", "apll", base + 0x50c, 0);
+	hws[IMX7ULP_CLK_APLL_PFD1]	= imx_clk_hw_pfdv2(IMX_PFDV2_IMX7ULP, "apll_pfd1", "apll", base + 0x50c, 1);
+	hws[IMX7ULP_CLK_APLL_PFD2]	= imx_clk_hw_pfdv2(IMX_PFDV2_IMX7ULP, "apll_pfd2", "apll", base + 0x50c, 2);
+	hws[IMX7ULP_CLK_APLL_PFD3]	= imx_clk_hw_pfdv2(IMX_PFDV2_IMX7ULP, "apll_pfd3", "apll", base + 0x50c, 3);
 
 	/* SPLL PFDs */
-	hws[IMX7ULP_CLK_SPLL_PFD0]	= imx_clk_hw_pfdv2("spll_pfd0", "spll", base + 0x60C, 0);
-	hws[IMX7ULP_CLK_SPLL_PFD1]	= imx_clk_hw_pfdv2("spll_pfd1", "spll", base + 0x60C, 1);
-	hws[IMX7ULP_CLK_SPLL_PFD2]	= imx_clk_hw_pfdv2("spll_pfd2", "spll", base + 0x60C, 2);
-	hws[IMX7ULP_CLK_SPLL_PFD3]	= imx_clk_hw_pfdv2("spll_pfd3", "spll", base + 0x60C, 3);
+	hws[IMX7ULP_CLK_SPLL_PFD0]	= imx_clk_hw_pfdv2(IMX_PFDV2_IMX7ULP, "spll_pfd0", "spll", base + 0x60C, 0);
+	hws[IMX7ULP_CLK_SPLL_PFD1]	= imx_clk_hw_pfdv2(IMX_PFDV2_IMX7ULP, "spll_pfd1", "spll", base + 0x60C, 1);
+	hws[IMX7ULP_CLK_SPLL_PFD2]	= imx_clk_hw_pfdv2(IMX_PFDV2_IMX7ULP, "spll_pfd2", "spll", base + 0x60C, 2);
+	hws[IMX7ULP_CLK_SPLL_PFD3]	= imx_clk_hw_pfdv2(IMX_PFDV2_IMX7ULP, "spll_pfd3", "spll", base + 0x60C, 3);
 
 	/* PLL Mux */
 	hws[IMX7ULP_CLK_APLL_PFD_SEL]	= imx_clk_hw_mux_flags("apll_pfd_sel", base + 0x508, 14, 2, apll_pfd_sels, ARRAY_SIZE(apll_pfd_sels), CLK_SET_RATE_PARENT | CLK_SET_PARENT_GATE);

drivers/clk/imx/clk-pfdv2.c

@@ -200,8 +200,8 @@ static const struct clk_ops clk_pfdv2_ops = {
 	.is_enabled     = clk_pfdv2_is_enabled,
 };
 
-struct clk_hw *imx_clk_hw_pfdv2(const char *name, const char *parent_name,
-			     void __iomem *reg, u8 idx)
+struct clk_hw *imx_clk_hw_pfdv2(enum imx_pfdv2_type type, const char *name,
+			     const char *parent_name, void __iomem *reg, u8 idx)
 {
 	struct clk_init_data init;
 	struct clk_pfdv2 *pfd;
@@ -223,7 +223,10 @@ struct clk_hw *imx_clk_hw_pfdv2(const char *name, const char *parent_name,
 	init.ops = &clk_pfdv2_ops;
 	init.parent_names = &parent_name;
 	init.num_parents = 1;
-	init.flags = CLK_SET_RATE_GATE | CLK_SET_RATE_PARENT;
+	if (type == IMX_PFDV2_IMX7ULP)
+		init.flags = CLK_SET_RATE_GATE | CLK_SET_RATE_PARENT;
+	else
+		init.flags = CLK_SET_RATE_GATE;
 
 	pfd->hw.init = &init;
 

drivers/clk/imx/clk.h

@@ -47,6 +47,11 @@ enum imx_pllv4_type {
 	IMX_PLLV4_IMX8ULP,
 };
 
+enum imx_pfdv2_type {
+	IMX_PFDV2_IMX7ULP,
+	IMX_PFDV2_IMX8ULP,
+};
+
 /* NOTE: Rate table should be kept sorted in descending order. */
 struct imx_pll14xx_rate_table {
 	unsigned int rate;
@@ -270,8 +275,8 @@ struct clk_hw *imx_clk_hw_gate_exclusive(const char *name, const char *parent,
 struct clk_hw *imx_clk_hw_pfd(const char *name, const char *parent_name,
 		void __iomem *reg, u8 idx);
 
-struct clk_hw *imx_clk_hw_pfdv2(const char *name, const char *parent_name,
-			     void __iomem *reg, u8 idx);
+struct clk_hw *imx_clk_hw_pfdv2(enum imx_pfdv2_type type, const char *name,
+	 const char *parent_name, void __iomem *reg, u8 idx);
 
 struct clk_hw *imx_clk_hw_busy_divider(const char *name, const char *parent_name,
 				 void __iomem *reg, u8 shift, u8 width,