linux-kernel - [PATCH v2] drm/msm: Use nvmem_cell_read_variable_le

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Date:   Fri, 21 May 2021 13:45:50 -0700
From:   Douglas Anderson <dianders@...omium.org>
To:     Rob Clark <robdclark@...il.com>
Cc:     John Stultz <john.stultz@...aro.org>,
        YongQin Liu <yongqin.liu@...aro.org>, swboyd@...omium.org,
        Jordan Crouse <jordan@...micpenguin.net>,
        linux-arm-msm@...r.kernel.org,
        Akhil P Oommen <akhilpo@...eaurora.org>,
        Douglas Anderson <dianders@...omium.org>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>, Eric Anholt <eric@...olt.net>,
        Jonathan Marek <jonathan@...ek.ca>,
        Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>,
        Sean Paul <sean@...rly.run>,
        Sharat Masetty <smasetty@...eaurora.org>,
        dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2] drm/msm: Use nvmem_cell_read_variable_le_u32() to read speed bin

Let's use the newly-added nvmem_cell_read_variable_le_u32() to future
proof ourselves a little bit.

Signed-off-by: Douglas Anderson <dianders@...omium.org>
---
The patch that this depends on is now in mainline so it can be merged
at will. I'm just sending this as a singleton patch to make it obvious
that there are no dependencies now.

Changes in v2:
- Rebased

 drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
index b4d8e1b01ee4..a07214157ad3 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
@@ -1403,10 +1403,10 @@ static int a6xx_set_supported_hw(struct device *dev, struct a6xx_gpu *a6xx_gpu,
 {
 	struct opp_table *opp_table;
 	u32 supp_hw = UINT_MAX;
-	u16 speedbin;
+	u32 speedbin;
 	int ret;
 
-	ret = nvmem_cell_read_u16(dev, "speed_bin", &speedbin);
+	ret = nvmem_cell_read_variable_le_u32(dev, "speed_bin", &speedbin);
 	/*
 	 * -ENOENT means that the platform doesn't support speedbin which is
 	 * fine
@@ -1419,7 +1419,6 @@ static int a6xx_set_supported_hw(struct device *dev, struct a6xx_gpu *a6xx_gpu,
 			      ret);
 		goto done;
 	}
-	speedbin = le16_to_cpu(speedbin);
 
 	supp_hw = fuse_to_supp_hw(dev, revn, speedbin);
 
-- 
2.31.1.818.g46aad6cb9e-goog