release/5.2.41/spi-bcm63xx-hsspi-Really-keep-pll-clk-enabled.patch

From 4a4edd625618585b7088d67d915d167738b17915 Mon Sep 17 00:00:00 2001
From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Date: Fri, 28 Feb 2020 22:38:38 +0100
Subject: [PATCH] spi: bcm63xx-hsspi: Really keep pll clk enabled

commit 51bddd4501bc414b8b1e8f4d096b4a5304068169 upstream.

The purpose of commit 0fd85869c2a9 ("spi/bcm63xx-hsspi: keep pll clk enabled")
was to keep the pll clk enabled through the lifetime of the device.

In order to do that, some 'clk_prepare_enable()'/'clk_disable_unprepare()'
calls have been added in the error handling path of the probe function, in
the remove function and in the suspend and resume functions.

However, a 'clk_disable_unprepare()' call has been unfortunately left in
the probe function. So the commit seems to be more or less a no-op.

Axe it now, so that the pll clk is left enabled through the lifetime of
the device, as described in the commit.

Fixes: 0fd85869c2a9 ("spi/bcm63xx-hsspi: keep pll clk enabled")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Jonas Gorski <jonas.gorski@gmail.com>
Link: https://lore.kernel.org/r/20200228213838.7124-1-christophe.jaillet@wanadoo.fr
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

diff --git a/drivers/spi/spi-bcm63xx-hsspi.c b/drivers/spi/spi-bcm63xx-hsspi.c
index 9a06ffdb73b8..1669c554ea34 100644
--- a/drivers/spi/spi-bcm63xx-hsspi.c
+++ b/drivers/spi/spi-bcm63xx-hsspi.c
@@ -371,7 +371,6 @@ static int bcm63xx_hsspi_probe(struct platform_device *pdev)
 			goto out_disable_clk;
 
 		rate = clk_get_rate(pll_clk);
-		clk_disable_unprepare(pll_clk);
 		if (!rate) {
 			ret = -EINVAL;
 			goto out_disable_pll_clk;
-- 
2.7.4