Applied "spi: rockchip: configure CTRLR1 according to size and data frame" to the spi tree
broonie at kernel.org
Wed Aug 16 04:21:01 PDT 2017
spi: rockchip: configure CTRLR1 according to size and data frame
has been applied to the spi tree at
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>From 04b37d2d02c0a5ae2f4e59326ef6deaff18e0456 Mon Sep 17 00:00:00 2001
From: Huibin Hong <huibin.hong at rock-chips.com>
Date: Wed, 16 Aug 2017 10:12:02 +0800
Subject: [PATCH] spi: rockchip: configure CTRLR1 according to size and data
CTRLR1 is number of data frames, when rx only.
When data frame is 8 bit, CTRLR1 is len-1.
When data frame is 16 bit, CTRLR1 is (len/2)-1.
Signed-off-by: Huibin Hong <huibin.hong at rock-chips.com>
Signed-off-by: Mark Brown <broonie at kernel.org>
drivers/spi/spi-rockchip.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/spi/spi-rockchip.c b/drivers/spi/spi-rockchip.c
index 474033e2149e..fdcf3076681b 100644
@@ -568,7 +568,13 @@ static void rockchip_spi_config(struct rockchip_spi *rs)
writel_relaxed(cr0, rs->regs + ROCKCHIP_SPI_CTRLR0);
- writel_relaxed(rs->len - 1, rs->regs + ROCKCHIP_SPI_CTRLR1);
+ if (rs->n_bytes == 1)
+ writel_relaxed(rs->len - 1, rs->regs + ROCKCHIP_SPI_CTRLR1);
+ else if (rs->n_bytes == 2)
+ writel_relaxed((rs->len / 2) - 1, rs->regs + ROCKCHIP_SPI_CTRLR1);
+ writel_relaxed((rs->len * 2) - 1, rs->regs + ROCKCHIP_SPI_CTRLR1);
writel_relaxed(rs->fifo_len / 2 - 1, rs->regs + ROCKCHIP_SPI_TXFTLR);
writel_relaxed(rs->fifo_len / 2 - 1, rs->regs + ROCKCHIP_SPI_RXFTLR);
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