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2022-10-05soc: sunxi: sram: Fix debugfs info for A64 SRAM CSamuel Holland1-2/+2
[ Upstream commit e3c95edb1bd8b9c2cb0caa6ae382fc8080f6a0ed ] The labels were backward with respect to the register values. The SRAM is mapped to the CPU when the register value is 1. Fixes: 5e4fb6429761 ("drivers: soc: sunxi: add support for A64 and its SRAM C") Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com> Signed-off-by: Samuel Holland <samuel@sholland.org> Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com> Link: https://lore.kernel.org/r/20220815041248.53268-7-samuel@sholland.org Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-10-05soc: sunxi: sram: Fix probe function ordering issuesSamuel Holland1-8/+5
[ Upstream commit 49fad91a7b8941979c3e9a35f9894ac45bc5d3d6 ] Errors from debugfs are intended to be non-fatal, and should not prevent the driver from probing. Since debugfs file creation is treated as infallible, move it below the parts of the probe function that can fail. This prevents an error elsewhere in the probe function from causing the file to leak. Do the same for the call to of_platform_populate(). Finally, checkpatch suggests an octal literal for the file permissions. Fixes: 4af34b572a85 ("drivers: soc: sunxi: Introduce SoC driver to map SRAMs") Fixes: 5828729bebbb ("soc: sunxi: export a regmap for EMAC clock reg on A64") Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com> Signed-off-by: Samuel Holland <samuel@sholland.org> Tested-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com> Link: https://lore.kernel.org/r/20220815041248.53268-6-samuel@sholland.org Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-10-05soc: sunxi_sram: Make use of the helper function ↵Cai Huoqing1-3/+1
devm_platform_ioremap_resource() [ Upstream commit 1f3753a5f042fea6539986f9caf2552877527d8a ] Use the devm_platform_ioremap_resource() helper instead of calling platform_get_resource() and devm_ioremap_resource() separately Signed-off-by: Cai Huoqing <caihuoqing@baidu.com> Signed-off-by: Maxime Ripard <maxime@cerno.tech> Link: https://lore.kernel.org/r/20210908071716.772-1-caihuoqing@baidu.com Stable-dep-of: 49fad91a7b89 ("soc: sunxi: sram: Fix probe function ordering issues") Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-10-05soc: sunxi: sram: Prevent the driver from being unboundSamuel Holland1-3/+2
[ Upstream commit 90e10a1fcd9b24b4ba8c0d35136127473dcd829e ] This driver exports a regmap tied to the platform device (as opposed to a syscon, which exports a regmap tied to the OF node). Because of this, the driver can never be unbound, as that would destroy the regmap. Use builtin_platform_driver_probe() to enforce this limitation. Fixes: 5828729bebbb ("soc: sunxi: export a regmap for EMAC clock reg on A64") Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com> Signed-off-by: Samuel Holland <samuel@sholland.org> Reviewed-by: Heiko Stuebner <heiko@sntech.de> Tested-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com> Link: https://lore.kernel.org/r/20220815041248.53268-5-samuel@sholland.org Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-10-05soc: sunxi: sram: Actually claim SRAM regionsSamuel Holland1-0/+1
[ Upstream commit fd362baad2e659ef0fb5652f023a606b248f1781 ] sunxi_sram_claim() checks the sram_desc->claimed flag before updating the register, with the intent that only one device can claim a region. However, this was ineffective because the flag was never set. Fixes: 4af34b572a85 ("drivers: soc: sunxi: Introduce SoC driver to map SRAMs") Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com> Signed-off-by: Samuel Holland <samuel@sholland.org> Reviewed-by: Heiko Stuebner <heiko@sntech.de> Tested-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com> Link: https://lore.kernel.org/r/20220815041248.53268-4-samuel@sholland.org Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-05-21treewide: Add SPDX license identifier - Makefile/KconfigThomas Gleixner2-0/+2
Add SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any form These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-04-30soc: sunxi: Fix missing dependency on REGMAP_MMIOSamuel Holland1-0/+1
When enabling ARCH_SUNXI from allnoconfig, SUNXI_SRAM is enabled, but not REGMAP_MMIO, so the kernel fails to link with an undefined reference to __devm_regmap_init_mmio_clk. Select REGMAP_MMIO, as suggested in drivers/base/regmap/Kconfig. This creates the following dependency loop: drivers/of/Kconfig:68: symbol OF_IRQ depends on IRQ_DOMAIN kernel/irq/Kconfig:63: symbol IRQ_DOMAIN is selected by REGMAP drivers/base/regmap/Kconfig:7: symbol REGMAP default is visible depending on REGMAP_MMIO drivers/base/regmap/Kconfig:39: symbol REGMAP_MMIO is selected by SUNXI_SRAM drivers/soc/sunxi/Kconfig:4: symbol SUNXI_SRAM is selected by USB_MUSB_SUNXI drivers/usb/musb/Kconfig:63: symbol USB_MUSB_SUNXI depends on GENERIC_PHY drivers/phy/Kconfig:7: symbol GENERIC_PHY is selected by PHY_BCM_NS_USB3 drivers/phy/broadcom/Kconfig:29: symbol PHY_BCM_NS_USB3 depends on MDIO_BUS drivers/net/phy/Kconfig:12: symbol MDIO_BUS default is visible depending on PHYLIB drivers/net/phy/Kconfig:181: symbol PHYLIB is selected by ARC_EMAC_CORE drivers/net/ethernet/arc/Kconfig:18: symbol ARC_EMAC_CORE is selected by ARC_EMAC drivers/net/ethernet/arc/Kconfig:24: symbol ARC_EMAC depends on OF_IRQ To fix the circular dependency, make USB_MUSB_SUNXI select GENERIC_PHY instead of depending on it. This matches the use of GENERIC_PHY by all but two other drivers. Cc: <stable@vger.kernel.org> # 4.19 Fixes: 5828729bebbb ("soc: sunxi: export a regmap for EMAC clock reg on A64") Signed-off-by: Samuel Holland <samuel@sholland.org> Acked-by: Maxime Ripard <maxime.ripard@bootlin.com> Signed-off-by: Bin Liu <b-liu@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-12-05soc: sunxi: sram: Add support for the H5 SoC system controlPaul Kocialkowski1-0/+4
This adds the H5 SoC compatible to the list of device-tree matches for the SRAM driver. Since the variant is the same as the A64 (that precedes the H5), the same variant description is used. Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com> Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
2018-12-05soc: sunxi: sram: Enable EMAC clock access for H3 variantPaul Kocialkowski1-1/+5
Just like the A64 and H5, the H3 SoC uses the system control block to enable the EMAC clock. Add a variant structure definition for the H3 and use it over the A10 one. This will allow using the H3-specific binding for the syscon node attached to the EMAC instead of the generic syscon binding. Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com> Reviewed-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
2018-11-22soc: sunxi: Change to use DEFINE_SHOW_ATTRIBUTE macroYangtao Li1-11/+1
Use DEFINE_SHOW_ATTRIBUTE macro to simplify the code. Signed-off-by: Yangtao Li <tiny.windzz@gmail.com> Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
2018-07-19soc: sunxi: Add the A13, A23 and H3 system control compatiblesMaxime Ripard1-0/+12
The A13, A23 and H3 have variations of the system controls, in part due to the SRAM that are available (and can be mapped) in the SoC. In order to make it future proof, let's add compatibles for these SoCs in the driver. Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
2018-07-11drivers: soc: sunxi: Add support for the C1 SRAM regionMaxime Ripard1-0/+10
This introduces support for the SRAM C1 section, that is controlled by the system controller. This SRAM area can be muxed either to the CPU or the Video Engine, that needs this area to store various tables (e.g. the Huffman VLD decoding tables). This only supports devices with the same layout as the A10 (which also includes the A13, A20, A33 and other SoCs). Reviewed-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com> Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com> Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
2018-07-11soc: sunxi: sram: Add dt match for the A10 system-control compatiblePaul Kocialkowski1-0/+4
This binds the new A10 system-control compatible to the associated driver, with the same driver data as the previous compatible. Reviewed-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com> Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
2018-06-19soc: sunxi: sram: Add updated compatible string for A64 system controlChen-Yu Tsai1-0/+4
The SRAM mapping controls on Allwinner SoCs is located in a block called "System Controls". This block also has registers for identifying the SoC, reading the state of an external boot-related pin, and on some newer SoCs, glue layer controls for the EMAC Ethernet controller. The A64 variant compatible is renamed to "allwinner,a64-system-control" to reflect this. The old A64 compatible is deprecated. So far we haven't seen any actual use of it. Acked-by: Maxime Ripard <maxime.ripard@bootlin.com> Signed-off-by: Chen-Yu Tsai <wens@csie.org>
2018-06-19soc: sunxi: export a regmap for EMAC clock reg on A64Icenowy Zheng1-2/+55
The A64 SRAM controller memory zone has a EMAC clock register, which is needed by the Ethernet MAC driver (dwmac-sun8i). Export a regmap for this register on A64. Signed-off-by: Icenowy Zheng <icenowy@aosc.io> [wens@csie.org: export whole address range with only EMAC register accessible and drop regmap name] Acked-by: Maxime Ripard <maxime.ripard@bootlin.com> Signed-off-by: Chen-Yu Tsai <wens@csie.org>
2017-08-18drivers: soc: sunxi: add support for A64 and its SRAM CIcenowy Zheng1-0/+11
Allwinner A64's display engine claims the SRAM C section to work. Add support for the A64 SRAM controller and the SRAM C section of it. Signed-off-by: Icenowy Zheng <icenowy@aosc.io> Signed-off-by: Chen-Yu Tsai <wens@csie.org>
2017-08-18drivers: soc: sunxi: add support for remapping func value to reg valueIcenowy Zheng1-9/+34
On some Allwinner SoCs, sometimes the value needed to write into the register to claim SRAM is not equal to the value specified in the device tree. The device tree binding defines 0 as "mapped to CPU" and 1 as "mapped to X device". This matches the value written to the configuration register for the SRAM blocks currently supported. However, the not yet supported VE SRAM block is claimed for the device by writing 0x7fffffff, which is vastly different from the other blocks. On the A64, SRAM C is claimed by the device by writing a 0, which is the opposite of the current design. Add a value remapping in sunxi_sram_func structure, and let the sunxi_sram_of_parse function set the remapped register value. This allows us to keep the convention currently used in the device tree binding. Signed-off-by: Icenowy Zheng <icenowy@aosc.io> [wens@csie.org: Clarified commit message] Signed-off-by: Chen-Yu Tsai <wens@csie.org>
2017-08-18drivers: soc: sunxi: fix error processing on base address when claimingIcenowy Zheng1-0/+3
When claiming SRAM, if the base is set to an error, it means that the SRAM controller has been probed, but failed to remap the controller memory zone. If the base is zero, thus the SRAM controller should be not probed at all, and it should return -EPROBE_DEFER. However, currently we returned -EPROBE_DEFER in the former situation, and ignored the latter situation (which will lead to the kernel to panic). Fix the behavior on abnormal base address processing when claiming. Signed-off-by: Icenowy Zheng <icenowy@aosc.io> Fixes: 4af34b572a85 ("drivers: soc: sunxi: Introduce SoC driver to map SRAMs") Signed-off-by: Chen-Yu Tsai <wens@csie.org>
2016-01-27drivers: soc: sunxi: Fix mask generation for SRAM mappingJens Kuske1-2/+3
GENMASK is inclusive on both ends, therefor one has to be subtracted from the width. Also fixes the mask for debug output. Signed-off-by: Jens Kuske <jenskuske@gmail.com> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-06-01drivers: soc: sunxi: Introduce SoC driver to map SRAMsMaxime Ripard3-0/+295
The Allwinner SoCs have a handful of SRAM that can be either mapped to be accessible by devices or the CPU. That mapping is controlled by an SRAM controller, and that mapping might not be set by the bootloader, for example if the device wasn't used at all, or if we're using solutions like the U-Boot's Falcon Boot. We could also imagine changing this at runtime for example to change the mapping of these SRAMs to use them for suspend/resume or runtime memory rate change, if that ever happens. These use cases require some API in the kernel to control that mapping, exported through a drivers/soc driver. This driver also implement a debugfs file that shows the SRAM found in the system, the current mapping and the SRAM that have been claimed by some drivers in the kernel. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Hans de Goede <hdegoede@redhat.com> Tested-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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