clk: mediatek: mt8195: Add support for frequency hopping through FHCTL

Add FHCTL parameters and register PLLs through FHCTL to add support
for frequency hopping and SSC. FHCTL will be enabled only on PLLs
specified in devicetree.

This commit brings functional changes only upon addition of
devicetree configuration.
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20230206100105.861720-8-angelogioacchino.delregno@collabora.comReviewed-by: Chen-Yu Tsai <wenst@chromium.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/mediatek/clk-mt8195-apmixedsys.c

@@ -3,9 +3,11 @@
 // Copyright (c) 2021 MediaTek Inc.
 // Author: Chun-Jie Chen <chun-jie.chen@mediatek.com>
 
+#include "clk-fhctl.h"
 #include "clk-gate.h"
 #include "clk-mtk.h"
 #include "clk-pll.h"
+#include "clk-pllfh.h"
 
 #include <dt-bindings/clock/mt8195-clk.h>
 #include <linux/of_device.h>
@@ -105,6 +107,61 @@ static const struct mtk_pll_data plls[] = {
 	    0, 0, 22, 0x0158, 24, 0, 0, 0, 0x0158, 0, 0x0158, 0, 9),
 };
 
+enum fh_pll_id {
+	FH_ARMPLL_LL,
+	FH_ARMPLL_BL,
+	FH_MEMPLL,
+	FH_ADSPPLL,
+	FH_NNAPLL,
+	FH_CCIPLL,
+	FH_MFGPLL,
+	FH_TVDPLL2,
+	FH_MPLL,
+	FH_MMPLL,
+	FH_MAINPLL,
+	FH_MSDCPLL,
+	FH_IMGPLL,
+	FH_VDECPLL,
+	FH_TVDPLL1,
+	FH_NR_FH,
+};
+
+#define FH(_pllid, _fhid, _offset) {					\
+		.data = {						\
+			.pll_id = _pllid,				\
+			.fh_id = _fhid,					\
+			.fh_ver = FHCTL_PLLFH_V2,			\
+			.fhx_offset = _offset,				\
+			.dds_mask = GENMASK(21, 0),			\
+			.slope0_value = 0x6003c97,			\
+			.slope1_value = 0x6003c97,			\
+			.sfstrx_en = BIT(2),				\
+			.frddsx_en = BIT(1),				\
+			.fhctlx_en = BIT(0),				\
+			.tgl_org = BIT(31),				\
+			.dvfs_tri = BIT(31),				\
+			.pcwchg = BIT(31),				\
+			.dt_val = 0x0,					\
+			.df_val = 0x9,					\
+			.updnlmt_shft = 16,				\
+			.msk_frddsx_dys = GENMASK(23, 20),		\
+			.msk_frddsx_dts = GENMASK(19, 16),		\
+		},							\
+	}
+
+static struct mtk_pllfh_data pllfhs[] = {
+	FH(CLK_APMIXED_ADSPPLL, FH_ADSPPLL, 0x78),
+	FH(CLK_APMIXED_NNAPLL, FH_NNAPLL, 0x8c),
+	FH(CLK_APMIXED_MFGPLL, FH_MFGPLL, 0xb4),
+	FH(CLK_APMIXED_TVDPLL2, FH_TVDPLL2, 0xc8),
+	FH(CLK_APMIXED_MMPLL, FH_MMPLL, 0xf0),
+	FH(CLK_APMIXED_MAINPLL, FH_MAINPLL, 0x104),
+	FH(CLK_APMIXED_MSDCPLL, FH_MSDCPLL, 0x118),
+	FH(CLK_APMIXED_IMGPLL, FH_IMGPLL, 0x12c),
+	FH(CLK_APMIXED_VDECPLL, FH_VDECPLL, 0x140),
+	FH(CLK_APMIXED_TVDPLL2, FH_TVDPLL1, 0x154),
+};
+
 static const struct of_device_id of_match_clk_mt8195_apmixed[] = {
 	{ .compatible = "mediatek,mt8195-apmixedsys", },
 	{}
@@ -114,13 +171,17 @@ static int clk_mt8195_apmixed_probe(struct platform_device *pdev)
 {
 	struct clk_hw_onecell_data *clk_data;
 	struct device_node *node = pdev->dev.of_node;
+	const u8 *fhctl_node = "mediatek,mt8195-fhctl";
 	int r;
 
 	clk_data = mtk_alloc_clk_data(CLK_APMIXED_NR_CLK);
 	if (!clk_data)
 		return -ENOMEM;
 
-	r = mtk_clk_register_plls(node, plls, ARRAY_SIZE(plls), clk_data);
+	fhctl_parse_dt(fhctl_node, pllfhs, ARRAY_SIZE(pllfhs));
+
+	r = mtk_clk_register_pllfhs(node, plls, ARRAY_SIZE(plls),
+				    pllfhs, ARRAY_SIZE(pllfhs), clk_data);
 	if (r)
 		goto free_apmixed_data;
 
@@ -140,7 +201,8 @@ static int clk_mt8195_apmixed_probe(struct platform_device *pdev)
 unregister_gates:
 	mtk_clk_unregister_gates(apmixed_clks, ARRAY_SIZE(apmixed_clks), clk_data);
 unregister_plls:
-	mtk_clk_unregister_plls(plls, ARRAY_SIZE(plls), clk_data);
+	mtk_clk_unregister_pllfhs(plls, ARRAY_SIZE(plls), pllfhs,
+				  ARRAY_SIZE(pllfhs), clk_data);
 free_apmixed_data:
 	mtk_free_clk_data(clk_data);
 	return r;
@@ -153,7 +215,8 @@ static int clk_mt8195_apmixed_remove(struct platform_device *pdev)
 
 	of_clk_del_provider(node);
 	mtk_clk_unregister_gates(apmixed_clks, ARRAY_SIZE(apmixed_clks), clk_data);
-	mtk_clk_unregister_plls(plls, ARRAY_SIZE(plls), clk_data);
+	mtk_clk_unregister_pllfhs(plls, ARRAY_SIZE(plls), pllfhs,
+				  ARRAY_SIZE(pllfhs), clk_data);
 	mtk_free_clk_data(clk_data);
 
 	return 0;