linux-kernel - [PATCH 2/3] clk: meson: meson8b: add the fractional divider for vid_pll

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Message-Id: <20181202214220.7715-3-martin.blumenstingl@googlemail.com>
Date:   Sun,  2 Dec 2018 22:42:19 +0100
From:   Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To:     linux-amlogic@...ts.infradead.org, jbrunet@...libre.com,
        narmstrong@...libre.com
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-clk@...r.kernel.org, sboyd@...nel.org,
        mturquette@...libre.com,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Subject: [PATCH 2/3] clk: meson: meson8b: add the fractional divider for vid_pll_dco

This "vid_pll_dco" (which should be named HDMI_PLL or - as the datasheet
calls it - HPLL) has a 12-bit wide fractional parameter at
HHI_VID_PLL_CNTL2[11:0]. Add this so we correctly calculate the rate of
this PLL when u-boot is configured for a video mode which uses this
fractional parameter.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
---
 drivers/clk/meson/meson8b.c | 5 +++++
 drivers/clk/meson/meson8b.h | 1 +
 2 files changed, 6 insertions(+)

diff --git a/drivers/clk/meson/meson8b.c b/drivers/clk/meson/meson8b.c
index a4ae9c957fde..0f3f4759fc92 100644
--- a/drivers/clk/meson/meson8b.c
+++ b/drivers/clk/meson/meson8b.c
@@ -137,6 +137,11 @@ static struct clk_regmap meson8b_vid_pll_dco = {
 			.shift   = 10,
 			.width   = 5,
 		},
+		.frac = {
+			.reg_off = HHI_VID_PLL_CNTL2,
+			.shift   = 0,
+			.width   = 12,
+		},
 		.l = {
 			.reg_off = HHI_VID_PLL_CNTL,
 			.shift   = 31,
diff --git a/drivers/clk/meson/meson8b.h b/drivers/clk/meson/meson8b.h
index 0abb331162ab..e953923792d7 100644
--- a/drivers/clk/meson/meson8b.h
+++ b/drivers/clk/meson/meson8b.h
@@ -33,6 +33,7 @@
 #define HHI_MPLL_CNTL			0x280 /* 0xa0 offset in data sheet */
 #define HHI_SYS_PLL_CNTL		0x300 /* 0xc0 offset in data sheet */
 #define HHI_VID_PLL_CNTL		0x320 /* 0xc8 offset in data sheet */
+#define HHI_VID_PLL_CNTL2		0x324 /* 0xc9 offset in data sheet */
 
 /*
  * MPLL register offeset taken from the S905 datasheet. Vendor kernel source
-- 
2.19.2