[08/13] clk: samsung: clk-pll: Add support for pll_1418x

Commit Message

David Virag Aug. 4, 2024, 9:53 p.m. UTC

pll1418x is used in Exynos7885 SoC for USB PHY clock.
Operation-wise it is very similar to pll0822x, except that MDIV is only
9 bits wide instead of 10, and we use the CON1 register in the PLL
macro's "con" parameter instead of CON3 like this:

	PLL(pll_1418x, CLK_FOUT_USB_PLL, "fout_usb_pll", "oscclk",
	    PLL_LOCKTIME_PLL_USB, PLL_CON0_PLL_USB,
	    pll_usb_rate_table),

Technically the PLL should work fine with pll0822x code if the PLL
tables are correct, but it's more "correct" to actually update the mask.

Signed-off-by: David Virag <[e-mail]>
---
 drivers/clk/samsung/clk-pll.c | 20 ++++++++++++++++----
 drivers/clk/samsung/clk-pll.h |  1 +
 2 files changed, 17 insertions(+), 4 deletions(-)

Patch

diff --git a/drivers/clk/samsung/clk-pll.c b/drivers/clk/samsung/clk-pll.c
index 4be879ab917e..c61a2810737c 100644
--- a/drivers/clk/samsung/clk-pll.c
+++ b/drivers/clk/samsung/clk-pll.c
@@ -430,6 +430,9 @@  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 */
+#define PLL1418X_MDIV_MASK		(0x1FF)
+
 static unsigned long samsung_pll0822x_recalc_rate(struct clk_hw *hw,
 						  unsigned long parent_rate)
 {
@@ -438,7 +441,10 @@  static unsigned long samsung_pll0822x_recalc_rate(struct clk_hw *hw,
 	u64 fvco = parent_rate;
 
 	pll_con3 = readl_relaxed(pll->con_reg);
-	mdiv = (pll_con3 >> PLL0822X_MDIV_SHIFT) & PLL0822X_MDIV_MASK;
+	if (pll->type != pll_1418x)
+		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;
 
@@ -468,9 +474,14 @@  static int samsung_pll0822x_set_rate(struct clk_hw *hw, unsigned long drate,
 
 	/* Change PLL PMS values */
 	pll_con3 = readl_relaxed(pll->con_reg);
-	pll_con3 &= ~((PLL0822X_MDIV_MASK << PLL0822X_MDIV_SHIFT) |
-			(PLL0822X_PDIV_MASK << PLL0822X_PDIV_SHIFT) |
-			(PLL0822X_SDIV_MASK << PLL0822X_SDIV_SHIFT));
+	if (pll->type != pll_1418x)
+		pll_con3 &= ~((PLL0822X_MDIV_MASK << PLL0822X_MDIV_SHIFT) |
+				(PLL0822X_PDIV_MASK << PLL0822X_PDIV_SHIFT) |
+				(PLL0822X_SDIV_MASK << PLL0822X_SDIV_SHIFT));
+	else
+		pll_con3 &= ~((PLL1418X_MDIV_MASK << PLL0822X_MDIV_SHIFT) |
+				(PLL0822X_PDIV_MASK << PLL0822X_PDIV_SHIFT) |
+				(PLL0822X_SDIV_MASK << PLL0822X_SDIV_SHIFT));
 	pll_con3 |= (rate->mdiv << PLL0822X_MDIV_SHIFT) |
 			(rate->pdiv << PLL0822X_PDIV_SHIFT) |
 			(rate->sdiv << PLL0822X_SDIV_SHIFT);
@@ -1317,6 +1328,7 @@  static void __init _samsung_clk_register_pll(struct samsung_clk_provider *ctx,
 			init.ops = &samsung_pll35xx_clk_ops;
 		break;
 	case pll_1417x:
+	case pll_1418x:
 	case pll_0818x:
 	case pll_0822x:
 	case pll_0516x:
diff --git a/drivers/clk/samsung/clk-pll.h b/drivers/clk/samsung/clk-pll.h
index ffd3d52c0dec..1efbe4c446d0 100644
--- a/drivers/clk/samsung/clk-pll.h
+++ b/drivers/clk/samsung/clk-pll.h
@@ -30,6 +30,7 @@  enum samsung_pll_type {
 	pll_2650x,
 	pll_2650xx,
 	pll_1417x,
+	pll_1418x,
 	pll_1450x,
 	pll_1451x,
 	pll_1452x,