linux-kernel - [PATCH 02/15] clk: ingenic: support PLLs with no bypass bit

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Message-Id: <20170607200439.24450-3-paul@crapouillou.net>
Date:   Wed,  7 Jun 2017 22:04:26 +0200
From:   Paul Cercueil <paul@...pouillou.net>
To:     Ralf Baechle <ralf@...ux-mips.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Rob Herring <robh+dt@...nel.org>
Cc:     Paul Burton <paul.burton@...tec.com>,
        Maarten ter Huurne <maarten@...ewalker.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mips@...ux-mips.org, linux-clk@...r.kernel.org,
        Paul Cercueil <paul@...pouillou.net>
Subject: [PATCH 02/15] clk: ingenic: support PLLs with no bypass bit

The second PLL of the JZ4770 does not have a bypass bit.
This commit makes it possible to support it with the current common CGU
code.

Signed-off-by: Paul Cercueil <paul@...pouillou.net>
---
 drivers/clk/ingenic/cgu.c | 3 ++-
 drivers/clk/ingenic/cgu.h | 2 ++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/ingenic/cgu.c b/drivers/clk/ingenic/cgu.c
index eb9002ccf3fc..75b083ba294c 100644
--- a/drivers/clk/ingenic/cgu.c
+++ b/drivers/clk/ingenic/cgu.c
@@ -100,7 +100,8 @@ ingenic_pll_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
 	n += pll_info->n_offset;
 	od_enc = ctl >> pll_info->od_shift;
 	od_enc &= GENMASK(pll_info->od_bits - 1, 0);
-	bypass = !!(ctl & BIT(pll_info->bypass_bit));
+	bypass = !pll_info->no_bypass_bit &&
+		 !!(ctl & BIT(pll_info->bypass_bit));
 	enable = !!(ctl & BIT(pll_info->enable_bit));
 
 	if (bypass)
diff --git a/drivers/clk/ingenic/cgu.h b/drivers/clk/ingenic/cgu.h
index 09700b2c555d..2e3d258c3ed2 100644
--- a/drivers/clk/ingenic/cgu.h
+++ b/drivers/clk/ingenic/cgu.h
@@ -48,6 +48,7 @@
  * @bypass_bit: the index of the bypass bit in the PLL control register
  * @enable_bit: the index of the enable bit in the PLL control register
  * @stable_bit: the index of the stable bit in the PLL control register
+ * @no_bypass_bit: if set, the PLL has no bypass functionality
  */
 struct ingenic_cgu_pll_info {
 	unsigned reg;
@@ -58,6 +59,7 @@ struct ingenic_cgu_pll_info {
 	u8 bypass_bit;
 	u8 enable_bit;
 	u8 stable_bit;
+	bool no_bypass_bit;
 };
 
 /**
-- 
2.11.0