diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-11-16 16:05:01 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-11-16 16:05:01 -0800 |
commit | cf9b0772f2e410645fece13b749bd56505b998b8 (patch) | |
tree | 8b171a2c49d1e9e41d4e43fb91602e664cde8551 /drivers/reset/reset-sunxi.c | |
parent | 527d1470744d338c912f94bc1f4dba08ffdff349 (diff) | |
parent | 339cd0ea082287ea8e2b7e7159a5a33665a2cbe3 (diff) |
Merge tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC driver updates from Arnd Bergmann:
"This branch contains platform-related driver updates for ARM and
ARM64, these are the areas that bring the changes:
New drivers:
- driver support for Renesas R-Car V3M (R8A77970)
- power management support for Amlogic GX
- a new driver for the Tegra BPMP thermal sensor
- a new bus driver for Technologic Systems NBUS
Changes for subsystems that prefer to merge through arm-soc:
- the usual updates for reset controller drivers from Philipp Zabel,
with five added drivers for SoCs in the arc, meson, socfpa,
uniphier and mediatek families
- updates to the ARM SCPI and PSCI frameworks, from Sudeep Holla,
Heiner Kallweit and Lorenzo Pieralisi
Changes specific to some ARM-based SoC
- the Freescale/NXP DPAA QBMan drivers from PowerPC can now work on
ARM as well
- several changes for power management on Broadcom SoCs
- various improvements on Qualcomm, Broadcom, Amlogic, Atmel,
Mediatek
- minor Cleanups for Samsung, TI OMAP SoCs"
[ NOTE! This doesn't work without the previous ARM SoC device-tree pull,
because the R8A77970 driver is missing a header file that came from
that pull.
The fact that this got merged afterwards only fixes it at this point,
and bisection of that driver will fail if/when you walk into the
history of that driver. - Linus ]
* tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (96 commits)
soc: amlogic: meson-gx-pwrc-vpu: fix power-off when powered by bootloader
bus: add driver for the Technologic Systems NBUS
memory: omap-gpmc: Remove deprecated gpmc_update_nand_reg()
soc: qcom: remove unused label
soc: amlogic: gx pm domain: add PM and OF dependencies
drivers/firmware: psci_checker: Add missing destroy_timer_on_stack()
dt-bindings: power: add amlogic meson power domain bindings
soc: amlogic: add Meson GX VPU Domains driver
soc: qcom: Remote filesystem memory driver
dt-binding: soc: qcom: Add binding for rmtfs memory
of: reserved_mem: Accessor for acquiring reserved_mem
of/platform: Generalize /reserved-memory handling
soc: mediatek: pwrap: fix fatal compiler error
soc: mediatek: pwrap: fix compiler errors
arm64: mediatek: cleanup message for platform selection
soc: Allow test-building of MediaTek drivers
soc: mediatek: place Kconfig for all SoC drivers under menu
soc: mediatek: pwrap: add support for MT7622 SoC
soc: mediatek: pwrap: add common way for setup CS timing extenstion
soc: mediatek: pwrap: add MediaTek MT6380 as one slave of pwrap
..
Diffstat (limited to 'drivers/reset/reset-sunxi.c')
-rw-r--r-- | drivers/reset/reset-sunxi.c | 104 |
1 files changed, 6 insertions, 98 deletions
diff --git a/drivers/reset/reset-sunxi.c b/drivers/reset/reset-sunxi.c index 2c7dd1fd08df..db9a1a75523f 100644 --- a/drivers/reset/reset-sunxi.c +++ b/drivers/reset/reset-sunxi.c @@ -22,64 +22,11 @@ #include <linux/spinlock.h> #include <linux/types.h> -struct sunxi_reset_data { - spinlock_t lock; - void __iomem *membase; - struct reset_controller_dev rcdev; -}; - -static int sunxi_reset_assert(struct reset_controller_dev *rcdev, - unsigned long id) -{ - struct sunxi_reset_data *data = container_of(rcdev, - struct sunxi_reset_data, - rcdev); - int reg_width = sizeof(u32); - int bank = id / (reg_width * BITS_PER_BYTE); - int offset = id % (reg_width * BITS_PER_BYTE); - unsigned long flags; - u32 reg; - - spin_lock_irqsave(&data->lock, flags); - - reg = readl(data->membase + (bank * reg_width)); - writel(reg & ~BIT(offset), data->membase + (bank * reg_width)); - - spin_unlock_irqrestore(&data->lock, flags); - - return 0; -} - -static int sunxi_reset_deassert(struct reset_controller_dev *rcdev, - unsigned long id) -{ - struct sunxi_reset_data *data = container_of(rcdev, - struct sunxi_reset_data, - rcdev); - int reg_width = sizeof(u32); - int bank = id / (reg_width * BITS_PER_BYTE); - int offset = id % (reg_width * BITS_PER_BYTE); - unsigned long flags; - u32 reg; - - spin_lock_irqsave(&data->lock, flags); - - reg = readl(data->membase + (bank * reg_width)); - writel(reg | BIT(offset), data->membase + (bank * reg_width)); - - spin_unlock_irqrestore(&data->lock, flags); - - return 0; -} - -static const struct reset_control_ops sunxi_reset_ops = { - .assert = sunxi_reset_assert, - .deassert = sunxi_reset_deassert, -}; +#include "reset-simple.h" static int sunxi_reset_init(struct device_node *np) { - struct sunxi_reset_data *data; + struct reset_simple_data *data; struct resource res; resource_size_t size; int ret; @@ -108,8 +55,9 @@ static int sunxi_reset_init(struct device_node *np) data->rcdev.owner = THIS_MODULE; data->rcdev.nr_resets = size * 8; - data->rcdev.ops = &sunxi_reset_ops; + data->rcdev.ops = &reset_simple_ops; data->rcdev.of_node = np; + data->active_low = true; return reset_controller_register(&data->rcdev); @@ -122,6 +70,8 @@ err_alloc: * These are the reset controller we need to initialize early on in * our system, before we can even think of using a regular device * driver for it. + * The controllers that we can register through the regular device + * model are handled by the simple reset driver directly. */ static const struct of_device_id sunxi_early_reset_dt_ids[] __initconst = { { .compatible = "allwinner,sun6i-a31-ahb1-reset", }, @@ -135,45 +85,3 @@ void __init sun6i_reset_init(void) for_each_matching_node(np, sunxi_early_reset_dt_ids) sunxi_reset_init(np); } - -/* - * And these are the controllers we can register through the regular - * device model. - */ -static const struct of_device_id sunxi_reset_dt_ids[] = { - { .compatible = "allwinner,sun6i-a31-clock-reset", }, - { /* sentinel */ }, -}; - -static int sunxi_reset_probe(struct platform_device *pdev) -{ - struct sunxi_reset_data *data; - struct resource *res; - - data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); - if (!data) - return -ENOMEM; - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - data->membase = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(data->membase)) - return PTR_ERR(data->membase); - - spin_lock_init(&data->lock); - - data->rcdev.owner = THIS_MODULE; - data->rcdev.nr_resets = resource_size(res) * 8; - data->rcdev.ops = &sunxi_reset_ops; - data->rcdev.of_node = pdev->dev.of_node; - - return devm_reset_controller_register(&pdev->dev, &data->rcdev); -} - -static struct platform_driver sunxi_reset_driver = { - .probe = sunxi_reset_probe, - .driver = { - .name = "sunxi-reset", - .of_match_table = sunxi_reset_dt_ids, - }, -}; -builtin_platform_driver(sunxi_reset_driver); |