svn commit: r355356 - head/sys/arm64/rockchip/clk

[Emmanuel Vadot]

Author: manu
Date: Tue Dec  3 19:18:32 2019
New Revision: 355356
URL: https://svnweb.freebsd.org/changeset/base/355356

Log:
  arm64: rockchip: rl3399: Remove the ability to put the PLL in normal mode at boot
  
  RK3399 PLLs have three modes :
   - Normal, where they behave normally and their freq is calculated based on
     the registers values.
   - Slow, where the PLL freq is 24Mhz (well, the external oscillator).
   - Deep Slow, used for suspend where the freq is 32Khz.
  
  We used to put every CPU related PLL in normal mode but it can cause problem
  if the firmware didn't setup the clocks register correctly.
  And even if it did but left the pll in slow or deep slow mode that might be
  because the PMIC suppling voltage for the CPU haven't been configured yet
  and we cannot do that at this point.
  So remove the ability to set PLLs to normal mode at boot to avoid any problems.

Modified:
  head/sys/arm64/rockchip/clk/rk3399_cru.c
  head/sys/arm64/rockchip/clk/rk_clk_pll.c
  head/sys/arm64/rockchip/clk/rk_clk_pll.h

Modified: head/sys/arm64/rockchip/clk/rk3399_cru.c
==============================================================================
--- head/sys/arm64/rockchip/clk/rk3399_cru.c	Tue Dec  3 19:14:02 2019	(r355355)
+++ head/sys/arm64/rockchip/clk/rk3399_cru.c	Tue Dec  3 19:18:32 2019	(r355356)
@@ -692,7 +692,7 @@ static struct rk_clk_armclk_rates rk3399_cpu_b_rates[]
 
 
 /* Standard PLL. */
-#define PLL(_id, _name, _base,  _nm)					\
+#define PLL(_id, _name, _base)						\
 {									\
 	.type = RK3399_CLK_PLL,						\
 	.clk.pll = &(struct rk_clk_pll_def) {				\
@@ -703,7 +703,6 @@ static struct rk_clk_armclk_rates rk3399_cpu_b_rates[]
 		.clkdef.flags = CLK_NODE_STATIC_STRINGS,		\
 		.base_offset = _base,					\
 		.rates = rk3399_pll_rates,				\
-		.normal_mode = _nm					\
 	},								\
 }
 
@@ -796,13 +795,13 @@ static struct rk_clk rk3399_clks[] = {
 	FFACT(0, "clk_ddrc_div2", "clk_ddrc", 1, 2),
 
 	/* PLLs */
-	PLL(PLL_APLLL, "lpll", 0x00, false),
-	PLL(PLL_APLLB, "bpll", 0x20, true),
-	PLL(PLL_DPLL,  "dpll", 0x40, false),
-	PLL(PLL_CPLL,  "cpll", 0x60, false),
-	PLL(PLL_GPLL,  "gpll", 0x80, false),
-	PLL(PLL_NPLL,  "npll", 0xA0, false),
-	PLL(PLL_VPLL,  "vpll", 0xC0, false),
+	PLL(PLL_APLLL, "lpll", 0x00),
+	PLL(PLL_APLLB, "bpll", 0x20),
+	PLL(PLL_DPLL,  "dpll", 0x40),
+	PLL(PLL_CPLL,  "cpll", 0x60),
+	PLL(PLL_GPLL,  "gpll", 0x80),
+	PLL(PLL_NPLL,  "npll", 0xA0),
+	PLL(PLL_VPLL,  "vpll", 0xC0),
 
 	/*  CRU_CLKSEL_CON0 */
 	CDIV(0, "aclkm_core_l_c", "armclkl", 0,

Modified: head/sys/arm64/rockchip/clk/rk_clk_pll.c
==============================================================================
--- head/sys/arm64/rockchip/clk/rk_clk_pll.c	Tue Dec  3 19:14:02 2019	(r355355)
+++ head/sys/arm64/rockchip/clk/rk_clk_pll.c	Tue Dec  3 19:18:32 2019	(r355356)
@@ -54,8 +54,6 @@ struct rk_clk_pll_sc {
 
 	struct rk_clk_pll_rate	*rates;
 	struct rk_clk_pll_rate	*frac_rates;
-
-	bool			normal_mode;
 };
 
 #define	WRITE4(_clk, off, val)						\
@@ -346,18 +344,8 @@ static int
 rk3399_clk_pll_init(struct clknode *clk, device_t dev)
 {
 	struct rk_clk_pll_sc *sc;
-	uint32_t reg;
 
 	sc = clknode_get_softc(clk);
-
-	if (sc->normal_mode) {
-		/* Setting to normal mode */
-		reg = RK3399_CLK_PLL_MODE_NORMAL << RK3399_CLK_PLL_MODE_SHIFT;
-		reg |= RK3399_CLK_PLL_MODE_MASK << RK_CLK_PLL_MASK_SHIFT;
-		WRITE4(clk, sc->base_offset + RK3399_CLK_PLL_MODE_OFFSET,
-		    reg | RK3399_CLK_PLL_WRITE_MASK);
-	}
-
 	clknode_init_parent_idx(clk, 0);
 
 	return (0);
@@ -549,7 +537,6 @@ rk3399_clk_pll_register(struct clkdom *clkdom, struct 
 	sc->flags = clkdef->flags;
 	sc->rates = clkdef->rates;
 	sc->frac_rates = clkdef->frac_rates;
-	sc->normal_mode = clkdef->normal_mode;
 
 	clknode_register(clkdom, clk);
 

Modified: head/sys/arm64/rockchip/clk/rk_clk_pll.h
==============================================================================
--- head/sys/arm64/rockchip/clk/rk_clk_pll.h	Tue Dec  3 19:14:02 2019	(r355355)
+++ head/sys/arm64/rockchip/clk/rk_clk_pll.h	Tue Dec  3 19:18:32 2019	(r355356)
@@ -57,8 +57,6 @@ struct rk_clk_pll_def {
 
 	struct rk_clk_pll_rate	*rates;
 	struct rk_clk_pll_rate	*frac_rates;
-
-	bool			normal_mode;
 };
 
 #define	RK_CLK_PLL_HAVE_GATE	0x1