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

From: Paul Cercueil
Date: Wed Jun 07 2017 - 16:04:56 EST


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@xxxxxxxxxxxxxxx>
---
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