clk: meson: mpll: fix mpll0 fractional part ignored

mpll0 clock is special compared to the other mplls. It needs another
bit (ssen) to be set to activate the fractional part the mpll divider

Fixes: 007e6e5 ("clk: meson: mpll: add rw operation")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>

Author: jbrun3t

drivers/clk/meson/clk-mpll.c

@@ -161,6 +161,13 @@ static int mpll_set_rate(struct clk_hw *hw,
 	reg = PARM_SET(p->width, p->shift, reg, 1);
 	writel(reg, mpll->base + p->reg_off);
 
+	p = &mpll->ssen;
+	if (p->width != 0) {
+		reg = readl(mpll->base + p->reg_off);
+		reg = PARM_SET(p->width, p->shift, reg, 1);
+		writel(reg, mpll->base + p->reg_off);
+	}
+
 	p = &mpll->n2;
 	reg = readl(mpll->base + p->reg_off);
 	reg = PARM_SET(p->width, p->shift, reg, n2);

drivers/clk/meson/clkc.h

@@ -118,6 +118,7 @@ struct meson_clk_mpll {
 	struct parm sdm_en;
 	struct parm n2;
 	struct parm en;
+	struct parm ssen;
 	spinlock_t *lock;
 };
 

drivers/clk/meson/gxbb.c

@@ -528,6 +528,11 @@ static struct meson_clk_mpll gxbb_mpll0 = {
 		.shift   = 14,
 		.width	 = 1,
 	},
+	.ssen = {
+		.reg_off = HHI_MPLL_CNTL,
+		.shift   = 25,
+		.width	 = 1,
+	},
 	.lock = &clk_lock,
 	.hw.init = &(struct clk_init_data){
 		.name = "mpll0",

drivers/clk/meson/meson8b.c

@@ -267,6 +267,11 @@ static struct meson_clk_mpll meson8b_mpll0 = {
 		.shift   = 14,
 		.width   = 1,
 	},
+	.ssen = {
+		.reg_off = HHI_MPLL_CNTL,
+		.shift   = 25,
+		.width   = 1,
+	},
 	.lock = &clk_lock,
 	.hw.init = &(struct clk_init_data){
 		.name = "mpll0",