From: Songjun Wu <songjun.wu@linux.intel.com>
To: hua.ma@linux.intel.com, yixin.zhu@linux.intel.com,
chuanhua.lei@linux.intel.com, qi-ming.wu@intel.com
Cc: linux-mips@linux-mips.org, linux-clk@vger.kernel.org,
linux-serial@vger.kernel.org, devicetree@vger.kernel.org,
Songjun Wu <songjun.wu@linux.intel.com>,
Ralf Baechle <ralf@linux-mips.org>,
Paul Burton <paul.burton@mips.com>,
James Hogan <jhogan@kernel.org>,
linux-kernel@vger.kernel.org
Subject: [PATCH v2 10/18] MIPS: lantiq: Unselect SWAP_IO_SPACE when LANTIQ is selected
Date: Fri, 3 Aug 2018 11:02:29 +0800 [thread overview]
Message-ID: <20180803030237.3366-11-songjun.wu@linux.intel.com> (raw)
In-Reply-To: <20180803030237.3366-1-songjun.wu@linux.intel.com>
SWAP_IO_SPACE macro prevents serial driver /drivers/tty/serial/lantiq.c
to use readl/writel to replace ltq_r32/w32 which are SoC or platform
specific APIs.
readl/writel are used for this serial driver to support multiple
platforms and multiple architectures. The legacy lantiq platform(Danube)
enables SWAP_IO_SPACE for supporting PCI due to some hardware bugs.
It's a little-endian bus plus PCI TX/RX swap enable impacted both data
and control path for MIPS based platforms. But it is better to let PCI
device driver to do endian swap since SWAP_IO_SPACE is a global wide macro
which potentially impacts other peripheral like USB.
ltq_r32/ltq_w32 is not impacted in other device drivers based on MIPS when
SWAP_IO_SPACE is not selected as they use non-byte swapping OS API
(__raw_read/__raw_writel).
Signed-off-by: Songjun Wu <songjun.wu@linux.intel.com>
---
Changes in v2: None
arch/mips/Kconfig | 1 -
1 file changed, 1 deletion(-)
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 2d34f17f3e24..2e7e0b538e52 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -400,7 +400,6 @@ config LANTIQ
select SYS_SUPPORTS_VPE_LOADER
select SYS_HAS_EARLY_PRINTK
select GPIOLIB
- select SWAP_IO_SPACE
select BOOT_RAW
select CLKDEV_LOOKUP
select USE_OF
--
2.11.0
next prev parent reply other threads:[~2018-08-03 3:04 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-03 3:02 [PATCH v2 00/18] MIPS: intel: add initial support for Intel MIPS SoCs Songjun Wu
2018-08-03 3:02 ` [PATCH v2 01/18] MIPS: intel: Add " Songjun Wu
2018-08-03 17:49 ` Paul Burton
2018-08-06 9:12 ` Hua Ma
2018-08-03 3:02 ` [PATCH v2 02/18] clk: intel: Add clock driver " Songjun Wu
2018-08-06 15:19 ` Rob Herring
2018-08-08 2:51 ` yixin zhu
2018-08-08 5:50 ` Stephen Boyd
2018-08-08 8:52 ` yixin zhu
2018-08-27 19:09 ` Stephen Boyd
2018-08-29 6:56 ` Zhu, Yi Xin
2018-08-31 17:10 ` Stephen Boyd
2018-09-03 10:47 ` Zhu, Yi Xin
2018-08-29 10:34 ` Zhu, Yi Xin
2018-08-31 17:13 ` Stephen Boyd
2018-09-03 10:52 ` Zhu, Yi Xin
2018-08-03 3:02 ` [PATCH v2 03/18] dt-bindings: clk: Add documentation of grx500 clock controller Songjun Wu
2018-08-06 15:18 ` Rob Herring
2018-08-08 3:08 ` yixin zhu
2018-08-08 14:54 ` Rob Herring
2018-08-03 3:02 ` [PATCH v2 04/18] MIPS: dts: Add initial support for Intel MIPS SoCs Songjun Wu
2018-08-04 11:11 ` Hauke Mehrtens
2018-08-06 9:20 ` Hua Ma
2018-08-03 3:02 ` [PATCH v2 05/18] dt-binding: MIPS: Add documentation of " Songjun Wu
2018-08-06 15:16 ` Rob Herring
2018-08-03 3:02 ` [PATCH v2 06/18] MIPS: dts: Change upper case to lower case Songjun Wu
2018-08-06 15:14 ` Rob Herring
2018-08-03 3:02 ` [PATCH v2 07/18] MIPS: dts: Add aliases node for lantiq danube serial Songjun Wu
2018-08-03 3:02 ` [PATCH v2 08/18] serial: intel: Get serial id from dts Songjun Wu
2018-08-03 5:43 ` Greg Kroah-Hartman
2018-08-06 9:32 ` Wu, Songjun
2018-08-07 7:33 ` Geert Uytterhoeven
2018-08-08 4:05 ` Wu, Songjun
2018-08-08 8:33 ` Geert Uytterhoeven
2018-08-10 8:13 ` Wu, Songjun
2018-08-03 3:02 ` [PATCH v2 09/18] serial: intel: Change ltq_w32_mask to asc_update_bits Songjun Wu
2018-08-03 3:02 ` Songjun Wu [this message]
2018-08-03 3:02 ` [PATCH v2 11/18] serial: intel: Use readl/writel instead of ltq_r32/ltq_w32 Songjun Wu
2018-08-03 3:02 ` [PATCH v2 12/18] serial: intel: Rename fpiclk to freqclk Songjun Wu
2018-08-03 3:02 ` [PATCH v2 13/18] serial: intel: Replace clk_enable/clk_disable with clk generic API Songjun Wu
2018-08-03 3:02 ` [PATCH v2 14/18] serial: intel: Add CCF support Songjun Wu
2018-08-03 5:56 ` Greg Kroah-Hartman
2018-08-03 7:33 ` Wu, Songjun
2018-08-03 10:30 ` Greg Kroah-Hartman
2018-08-04 10:54 ` Hauke Mehrtens
2018-08-04 12:43 ` Greg Kroah-Hartman
2018-08-04 21:03 ` Arnd Bergmann
2018-08-06 7:05 ` Wu, Songjun
2018-08-06 7:20 ` Geert Uytterhoeven
2018-08-06 8:58 ` Wu, Songjun
2018-08-06 9:29 ` Geert Uytterhoeven
2018-08-07 7:18 ` Wu, Songjun
2018-08-07 7:33 ` Geert Uytterhoeven
2018-08-03 3:02 ` [PATCH v2 15/18] serial: intel: Support more platform Songjun Wu
2018-08-03 5:57 ` Greg Kroah-Hartman
2018-08-03 7:21 ` Wu, Songjun
2018-08-05 8:37 ` Christoph Hellwig
2018-08-06 7:20 ` Wu, Songjun
2018-08-03 3:02 ` [PATCH v2 16/18] serial: intel: Reorder the head files Songjun Wu
2018-08-03 3:02 ` [PATCH v2 17/18] serial: intel: Change init_lqasc to static declaration Songjun Wu
2018-08-03 3:02 ` [PATCH v2 18/18] dt-bindings: serial: lantiq: Add optional properties for CCF Songjun Wu
2018-08-13 17:53 ` Rob Herring
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