linux-kernel - [PATCH 1/1] nvmem: sunxi_sid: fix A64 SID controller support

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Message-Id: <20190731071447.9019-2-stefan@olimex.com>
Date:   Wed, 31 Jul 2019 10:14:47 +0300
From:   Stefan Mavrodiev <stefan@...mex.com>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Chen-Yu Tsai <wens@...e.org>,
        linux-arm-kernel@...ts.infradead.org (moderated list:ARM/Allwinner
        sunXi SoC support), linux-kernel@...r.kernel.org (open list)
Cc:     linux-sunxi@...glegroups.com, Stefan Mavrodiev <stefan@...mex.com>
Subject: [PATCH 1/1] nvmem: sunxi_sid: fix A64 SID controller support

Like in H3, A64 SID controller doesn't return correct data
when using direct access. It appears that on A64, SID needs
8 bytes of word_size.

Workaround is to enable read by registers.

Signed-off-by: Stefan Mavrodiev <stefan@...mex.com>
---
 drivers/nvmem/sunxi_sid.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/nvmem/sunxi_sid.c b/drivers/nvmem/sunxi_sid.c
index a079a80ddf2c..e26ef1bbf198 100644
--- a/drivers/nvmem/sunxi_sid.c
+++ b/drivers/nvmem/sunxi_sid.c
@@ -186,6 +186,7 @@ static const struct sunxi_sid_cfg sun8i_h3_cfg = {
 static const struct sunxi_sid_cfg sun50i_a64_cfg = {
 	.value_offset = 0x200,
 	.size = 0x100,
+	.need_register_readout = true,
 };
 
 static const struct sunxi_sid_cfg sun50i_h6_cfg = {
-- 
2.17.1