linux-kernel - [PATCH v5 26/27] clk: bcm2835: Don't cache the PLLB rate

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Date:   Mon, 15 Jun 2020 10:41:06 +0200
From:   Maxime Ripard <maxime@...no.tech>
To:     Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
Cc:     linux-rpi-kernel@...ts.infradead.org,
        bcm-kernel-feedback-list@...adcom.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Dave Stevenson <dave.stevenson@...pberrypi.com>,
        Tim Gover <tim.gover@...pberrypi.com>,
        Phil Elwell <phil@...pberrypi.com>,
        Mike Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>, linux-clk@...r.kernel.org,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Maxime Ripard <maxime@...no.tech>
Subject: [PATCH v5 26/27] clk: bcm2835: Don't cache the PLLB rate

The PLLB rate will be changed through the firmware clocks drivers and will
change behind this drivers' back, so we don't want to cache the rate.

Acked-by: Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
Tested-by: Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
Signed-off-by: Maxime Ripard <maxime@...no.tech>
---
 drivers/clk/bcm/clk-bcm2835.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/bcm/clk-bcm2835.c b/drivers/clk/bcm/clk-bcm2835.c
index b50f00f109bf..027eba31f793 100644
--- a/drivers/clk/bcm/clk-bcm2835.c
+++ b/drivers/clk/bcm/clk-bcm2835.c
@@ -1700,7 +1700,8 @@ static const struct bcm2835_clk_desc clk_desc_array[] = {
 
 		.min_rate = 600000000u,
 		.max_rate = 3000000000u,
-		.max_fb_rate = BCM2835_MAX_FB_RATE),
+		.max_fb_rate = BCM2835_MAX_FB_RATE,
+		.flags = CLK_GET_RATE_NOCACHE),
 	[BCM2835_PLLB_ARM]	= REGISTER_PLL_DIV(
 		SOC_ALL,
 		.name = "pllb_arm",
@@ -1710,7 +1711,7 @@ static const struct bcm2835_clk_desc clk_desc_array[] = {
 		.load_mask = CM_PLLB_LOADARM,
 		.hold_mask = CM_PLLB_HOLDARM,
 		.fixed_divider = 1,
-		.flags = CLK_SET_RATE_PARENT),
+		.flags = CLK_SET_RATE_PARENT | CLK_GET_RATE_NOCACHE),
 
 	/*
 	 * PLLC is the core PLL, used to drive the core VPU clock.
-- 
git-series 0.9.1