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From: Dmitry Osipenko <digetx@gmail.com>
To: digetx@gmail.com, Wolfram Sang <wsa@the-dreams.de>,
	Stephen Warren <swarren@wwwdotorg.org>,
	Thierry Reding <thierry.reding@gmail.com>,
	Alexandre Courbot <gnurou@gmail.com>,
	Laxman Dewangan <ldewangan@nvidia.com>
Cc: Ben Dooks <ben.dooks@codethink.co.uk>,
	Bob Mottram <bob.mottram@codethink.co.uk>,
	linux-tegra@vger.kernel.org, linux-i2c@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH 1/2] i2c: tegra: Maintain CPU endianness
Date: Tue, 20 Jan 2015 15:22:25 +0300	[thread overview]
Message-ID: <1421756555-20266-1-git-send-email-digetx@gmail.com> (raw)

Support CPU BE mode by adding endianness conversion for memcpy interactions.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
 drivers/i2c/busses/i2c-tegra.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
index 28b87e6..e0d3ef1 100644
--- a/drivers/i2c/busses/i2c-tegra.c
+++ b/drivers/i2c/busses/i2c-tegra.c
@@ -286,6 +286,7 @@ static int tegra_i2c_empty_rx_fifo(struct tegra_i2c_dev *i2c_dev)
 	if (rx_fifo_avail > 0 && buf_remaining > 0) {
 		BUG_ON(buf_remaining > 3);
 		val = i2c_readl(i2c_dev, I2C_RX_FIFO);
+		val = cpu_to_le32(val);
 		memcpy(buf, &val, buf_remaining);
 		buf_remaining = 0;
 		rx_fifo_avail--;
@@ -343,7 +344,9 @@ static int tegra_i2c_fill_tx_fifo(struct tegra_i2c_dev *i2c_dev)
 	 */
 	if (tx_fifo_avail > 0 && buf_remaining > 0) {
 		BUG_ON(buf_remaining > 3);
+		val = 0;
 		memcpy(&val, buf, buf_remaining);
+		val = cpu_to_le32(val);
 
 		/* Again update before writing to FIFO to make sure isr sees. */
 		i2c_dev->msg_buf_remaining = 0;
-- 
2.2.1

             reply	other threads:[~2015-01-20 12:22 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-01-20 12:22 Dmitry Osipenko [this message]
     [not found] ` <1421756555-20266-1-git-send-email-digetx-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-01-22  7:40   ` [PATCH 1/2] i2c: tegra: Maintain CPU endianness Thierry Reding
2015-01-22  7:40     ` Thierry Reding
2015-01-22  7:55     ` Alexandre Courbot
2015-01-22  7:55       ` Alexandre Courbot
     [not found]       ` <CAAVeFuJHST9VOWXe_cZNvLmfGdamuU4HSgdZC6EoQvrsGFt+Fg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-01-22 15:22         ` Dmitry Osipenko
2015-01-22 15:22           ` Dmitry Osipenko
     [not found]           ` <54C115D1.10206-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-01-22 16:06             ` Dmitry Osipenko
2015-01-22 16:06               ` Dmitry Osipenko
     [not found]               ` <54C12010.8040504-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-01-22 17:18                 ` Dmitry Osipenko
2015-01-22 17:18                   ` Dmitry Osipenko
     [not found]                   ` <54C130EA.2050505-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-01-23  9:45                     ` Thierry Reding
2015-01-23  9:45                       ` Thierry Reding
2015-01-23 13:27                       ` Dmitry Osipenko
2015-01-23 13:27                         ` Dmitry Osipenko
     [not found]                         ` <54C24C2B.1070907-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-01-23 14:52                           ` Dmitry Osipenko
2015-01-23 14:52                             ` Dmitry Osipenko
     [not found]                             ` <54C2601A.7000005-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-01-26 16:03                               ` Wolfram Sang
2015-01-26 16:03                                 ` Wolfram Sang
2015-01-26 16:11                                 ` Dmitry Osipenko
2015-01-26 16:11                                   ` Dmitry Osipenko

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