From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Qii Wang <qii.wang@mediatek.com>,
Andy Shevchenko <andy.shevchenko@gmail.com>,
Wolfram Sang <wsa@kernel.org>, Sasha Levin <sashal@kernel.org>,
linux-i2c@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org
Subject: [PATCH AUTOSEL 5.8 19/20] i2c: mediatek: Send i2c master code at more than 1MHz
Date: Mon, 21 Sep 2020 10:40:26 -0400 [thread overview]
Message-ID: <20200921144027.2135390-19-sashal@kernel.org> (raw)
In-Reply-To: <20200921144027.2135390-1-sashal@kernel.org>
From: Qii Wang <qii.wang@mediatek.com>
[ Upstream commit b44658e755b5a733e9df04449facbc738df09170 ]
The master code needs to being sent when the speed is more than
I2C_MAX_FAST_MODE_PLUS_FREQ, not I2C_MAX_FAST_MODE_FREQ in the
latest I2C-bus specification and user manual.
Signed-off-by: Qii Wang <qii.wang@mediatek.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/i2c/busses/i2c-mt65xx.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c
index deef69e569062..440b12eba1e3c 100644
--- a/drivers/i2c/busses/i2c-mt65xx.c
+++ b/drivers/i2c/busses/i2c-mt65xx.c
@@ -736,7 +736,7 @@ static int mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk)
for (clk_div = 1; clk_div <= max_clk_div; clk_div++) {
clk_src = parent_clk / clk_div;
- if (target_speed > I2C_MAX_FAST_MODE_FREQ) {
+ if (target_speed > I2C_MAX_FAST_MODE_PLUS_FREQ) {
/* Set master code speed register */
ret = mtk_i2c_calculate_speed(i2c, clk_src,
I2C_MAX_FAST_MODE_FREQ,
--
2.25.1
prev parent reply other threads:[~2020-09-21 14:40 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20200921144027.2135390-1-sashal@kernel.org>
2020-09-21 14:40 ` [PATCH AUTOSEL 5.8 08/20] i2c: aspeed: Mask IRQ status to relevant bits Sasha Levin
2020-09-21 14:40 ` [PATCH AUTOSEL 5.8 17/20] i2c: core: Call i2c_acpi_install_space_handler() before i2c_acpi_register_devices() Sasha Levin
2020-10-14 11:09 ` Kieran Bingham
2020-10-14 11:23 ` Hans de Goede
2020-10-14 11:52 ` Kieran Bingham
2020-10-14 13:46 ` Hans de Goede
2020-09-21 14:40 ` Sasha Levin [this message]
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