linux-kernel - [PATCH v1 2/3] clk: samsung: clk-pll: Add support for pll

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Message-ID: <20241205193423.783815-3-igor.belwon@mentallysanemainliners.org>
Date: Thu,  5 Dec 2024 20:34:22 +0100
From: Igor Belwon <igor.belwon@...tallysanemainliners.org>
To: Krzysztof Kozlowski <krzk@...nel.org>,
	Sylwester Nawrocki <s.nawrocki@...sung.com>,
	Chanwoo Choi <cw00.choi@...sung.com>,
	Alim Akhtar <alim.akhtar@...sung.com>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>
Cc: linux-samsung-soc@...r.kernel.org,
	linux-clk@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v1 2/3] clk: samsung: clk-pll: Add support for pll_{0717x, 0718x, 0732x}

These PLLs are found in the Exynos990 SoC. The PLLs are similar
to pll0822x.

pll0717x and pll0718x are an exception, and they use the mdiv
mask from 1718X (that is, one bit smaller).

Apart from that, the masks/shifts are identical to those of 0822x.

Signed-off-by: Igor Belwon <igor.belwon@...tallysanemainliners.org>
---
 drivers/clk/samsung/clk-pll.c | 14 ++++++++++++--
 drivers/clk/samsung/clk-pll.h |  3 +++
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/samsung/clk-pll.c b/drivers/clk/samsung/clk-pll.c
index be6b51694919..2e94bba6c396 100644
--- a/drivers/clk/samsung/clk-pll.c
+++ b/drivers/clk/samsung/clk-pll.c
@@ -430,7 +430,10 @@ static const struct clk_ops samsung_pll36xx_clk_min_ops = {
 #define PLL0822X_LOCK_STAT_SHIFT	(29)
 #define PLL0822X_ENABLE_SHIFT		(31)
 
-/* PLL1418x is similar to PLL0822x, except that MDIV is one bit smaller */
+/*
+ * PLL1418x, PLL0717x and PLL0718x are similar
+ * to PLL0822x, except that MDIV is one bit smaller
+ */
 #define PLL1418X_MDIV_MASK		(0x1FF)
 
 static unsigned long samsung_pll0822x_recalc_rate(struct clk_hw *hw,
@@ -441,10 +444,14 @@ static unsigned long samsung_pll0822x_recalc_rate(struct clk_hw *hw,
 	u64 fvco = parent_rate;
 
 	pll_con3 = readl_relaxed(pll->con_reg);
-	if (pll->type != pll_1418x)
+
+	if (pll->type != pll_1418x &&
+	    pll->type != pll_0717x &&
+	    pll->type != pll_0718x)
 		mdiv = (pll_con3 >> PLL0822X_MDIV_SHIFT) & PLL0822X_MDIV_MASK;
 	else
 		mdiv = (pll_con3 >> PLL0822X_MDIV_SHIFT) & PLL1418X_MDIV_MASK;
+
 	pdiv = (pll_con3 >> PLL0822X_PDIV_SHIFT) & PLL0822X_PDIV_MASK;
 	sdiv = (pll_con3 >> PLL0822X_SDIV_SHIFT) & PLL0822X_SDIV_MASK;
 
@@ -1377,6 +1384,9 @@ static void __init _samsung_clk_register_pll(struct samsung_clk_provider *ctx,
 	case pll_0516x:
 	case pll_0517x:
 	case pll_0518x:
+	case pll_0717x:
+	case pll_0718x:
+	case pll_0732x:
 		pll->enable_offs = PLL0822X_ENABLE_SHIFT;
 		pll->lock_offs = PLL0822X_LOCK_STAT_SHIFT;
 		if (!pll->rate_table)
diff --git a/drivers/clk/samsung/clk-pll.h b/drivers/clk/samsung/clk-pll.h
index 858ab367eb65..6ddc54d173a0 100644
--- a/drivers/clk/samsung/clk-pll.h
+++ b/drivers/clk/samsung/clk-pll.h
@@ -45,6 +45,9 @@ enum samsung_pll_type {
 	pll_531x,
 	pll_1051x,
 	pll_1052x,
+	pll_0717x,
+	pll_0718x,
+	pll_0732x,
 };
 
 #define PLL_RATE(_fin, _m, _p, _s, _k, _ks) \
-- 
2.45.2