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ARM: SoC board updates for 3.12

Browse source 
Board updates for 3.12. Again, a bit of domain overlap with SoC and DT branches,
 but most of this is around legacy code and board support. We've found that
 platform maintainers have a hard time separating all of these out and might
 move towards fewer branches for next release.
 
 - Removal of a number of Marvell Kirkwood board files, since contents
   is now common and mostly configured via DT.
 - Device-tree updates for Marvell Dove, including irqchip and clocksource
   setup.
 - Defconfig updates. Gotta go somewhere. One new one for Renesas Lager.
 - New backlight drivers for backlights used on Renesas shmobile platforms.
 - Removal of Renesas leds driver.
 - Shuffling of some of the new Broadcom platforms to give room for others in
   the same mach directory. More in 2.13.
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Merge tag 'boards-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC board updates from Olof Johansson:
 "Board updates for 3.12.  Again, a bit of domain overlap with SoC and
  DT branches, but most of this is around legacy code and board support.
  We've found that platform maintainers have a hard time separating all
  of these out and might move towards fewer branches for next release.

   - Removal of a number of Marvell Kirkwood board files, since contents
     is now common and mostly configured via DT.
   - Device-tree updates for Marvell Dove, including irqchip and
     clocksource setup.
   - Defconfig updates.  Gotta go somewhere.  One new one for Renesas
     Lager.
   - New backlight drivers for backlights used on Renesas shmobile
     platforms.
   - Removal of Renesas leds driver.
   - Shuffling of some of the new Broadcom platforms to give room for
     others in the same mach directory.  More in 3.13"

* tag 'boards-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (67 commits)
  mmc: sdhci-bcm-kona: Staticize sdhci_bcm_kona_card_event
  mmc: sdhci-bcm-kona: Remove unneeded version.h inclusion
  ARM: bcm: Make secure API call optional
  ARM: DT: binding fixup to align with vendor-prefixes.txt (drivers)
  ARM: mmc: fix NONREMOVABLE test in sdhci-bcm-kona
  ARM: bcm: Rename board_bcm
  mmc: sdhci-bcm-kona: make linker-section warning go away
  ARM: tegra: defconfig updates
  ARM: dove: add initial DT file for Globalscale D2Plug
  ARM: dove: add GPIO IR receiver node to SolidRun CuBox
  ARM: dove: add common pinmux functions to DT
  ARM: dove: add cpu device tree node
  ARM: dove: update dove_defconfig with SI5351, PCI, and xHCI
  arch/arm/mach-kirkwood: Avoid using ARRAY_AND_SIZE(e) as a function argument
  ARM: kirkwood: fix DT building and update defconfig
  ARM: kirkwood: Remove all remaining trace of DNS-320/325 platform code
  ARM: configs: disable DEBUG_LL in bcm_defconfig
  ARM: bcm281xx: Board specific reboot code
  ARM bcm281xx: Turn on socket & network support.
  ARM: bcm281xx: Turn on L2 cache.
  ...
This commit is contained in:
Linus Torvalds 2013-09-06 13:34:43 -07:00
commit 44598f98b9
111 changed files with 2416 additions and 3040 deletions
Download patch file Download diff file Expand all files Collapse all files

12
drivers/leds/Kconfig
View file

@ -429,18 +429,6 @@ config LEDS_ASIC3
cannot be used. This driver supports hardware blinking with an on+off
period from 62ms to 125s. Say Y to enable LEDs on the HP iPAQ hx4700.
config LEDS_RENESAS_TPU
bool "LED support for Renesas TPU"
depends on LEDS_CLASS=y && HAVE_CLK && GPIOLIB
help
This option enables build of the LED TPU platform driver,
suitable to drive any TPU channel on newer Renesas SoCs.
The driver controls the GPIO pin connected to the LED via
the GPIO framework and expects the LED to be connected to
a pin that can be driven in both GPIO mode and using TPU
pin function. The latter to support brightness control.
Brightness control is supported but hardware blinking is not.
config LEDS_TCA6507
tristate "LED Support for TCA6507 I2C chip"
depends on LEDS_CLASS && I2C

1
drivers/leds/Makefile
View file

@ -49,7 +49,6 @@ obj-$(CONFIG_LEDS_MC13783) += leds-mc13783.o
obj-$(CONFIG_LEDS_NS2) += leds-ns2.o
obj-$(CONFIG_LEDS_NETXBIG) += leds-netxbig.o
obj-$(CONFIG_LEDS_ASIC3) += leds-asic3.o
obj-$(CONFIG_LEDS_RENESAS_TPU) += leds-renesas-tpu.o
obj-$(CONFIG_LEDS_MAX8997) += leds-max8997.o
obj-$(CONFIG_LEDS_LM355x) += leds-lm355x.o
obj-$(CONFIG_LEDS_BLINKM) += leds-blinkm.o

337
drivers/leds/leds-renesas-tpu.c
View file

@ -1,337 +0,0 @@
/*
* LED control using Renesas TPU
*
* Copyright (C) 2011 Magnus Damm
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/spinlock.h>
#include <linux/printk.h>
#include <linux/ioport.h>
#include <linux/io.h>
#include <linux/clk.h>
#include <linux/leds.h>
#include <linux/platform_data/leds-renesas-tpu.h>
#include <linux/gpio.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/pm_runtime.h>
#include <linux/workqueue.h>
enum r_tpu_pin { R_TPU_PIN_UNUSED, R_TPU_PIN_GPIO, R_TPU_PIN_GPIO_FN };
enum r_tpu_timer { R_TPU_TIMER_UNUSED, R_TPU_TIMER_ON };
struct r_tpu_priv {
struct led_classdev ldev;
void __iomem *mapbase;
struct clk *clk;
struct platform_device *pdev;
enum r_tpu_pin pin_state;
enum r_tpu_timer timer_state;
unsigned long min_rate;
unsigned int refresh_rate;
struct work_struct work;
enum led_brightness new_brightness;
};
static DEFINE_SPINLOCK(r_tpu_lock);
#define TSTR -1 /* Timer start register (shared register) */
#define TCR 0 /* Timer control register (+0x00) */
#define TMDR 1 /* Timer mode register (+0x04) */
#define TIOR 2 /* Timer I/O control register (+0x08) */
#define TIER 3 /* Timer interrupt enable register (+0x0c) */
#define TSR 4 /* Timer status register (+0x10) */
#define TCNT 5 /* Timer counter (+0x14) */
#define TGRA 6 /* Timer general register A (+0x18) */
#define TGRB 7 /* Timer general register B (+0x1c) */
#define TGRC 8 /* Timer general register C (+0x20) */
#define TGRD 9 /* Timer general register D (+0x24) */
static inline u16 r_tpu_read(struct r_tpu_priv *p, int reg_nr)
{
struct led_renesas_tpu_config *cfg = p->pdev->dev.platform_data;
void __iomem *base = p->mapbase;
unsigned long offs = reg_nr << 2;
if (reg_nr == TSTR)
return ioread16(base - cfg->channel_offset);
return ioread16(base + offs);
}
static inline void r_tpu_write(struct r_tpu_priv *p, int reg_nr, u16 value)
{
struct led_renesas_tpu_config *cfg = p->pdev->dev.platform_data;
void __iomem *base = p->mapbase;
unsigned long offs = reg_nr << 2;
if (reg_nr == TSTR) {
iowrite16(value, base - cfg->channel_offset);
return;
}
iowrite16(value, base + offs);
}
static void r_tpu_start_stop_ch(struct r_tpu_priv *p, int start)
{
struct led_renesas_tpu_config *cfg = p->pdev->dev.platform_data;
unsigned long flags;
u16 value;
/* start stop register shared by multiple timer channels */
spin_lock_irqsave(&r_tpu_lock, flags);
value = r_tpu_read(p, TSTR);
if (start)
value |= 1 << cfg->timer_bit;
else
value &= ~(1 << cfg->timer_bit);
r_tpu_write(p, TSTR, value);
spin_unlock_irqrestore(&r_tpu_lock, flags);
}
static int r_tpu_enable(struct r_tpu_priv *p, enum led_brightness brightness)
{
struct led_renesas_tpu_config *cfg = p->pdev->dev.platform_data;
int prescaler[] = { 1, 4, 16, 64 };
int k, ret;
unsigned long rate, tmp;
if (p->timer_state == R_TPU_TIMER_ON)
return 0;
/* wake up device and enable clock */
pm_runtime_get_sync(&p->pdev->dev);
ret = clk_enable(p->clk);
if (ret) {
dev_err(&p->pdev->dev, "cannot enable clock\n");
return ret;
}
/* make sure channel is disabled */
r_tpu_start_stop_ch(p, 0);
/* get clock rate after enabling it */
rate = clk_get_rate(p->clk);
/* pick the lowest acceptable rate */
for (k = ARRAY_SIZE(prescaler) - 1; k >= 0; k--)
if ((rate / prescaler[k]) >= p->min_rate)
break;
if (k < 0) {
dev_err(&p->pdev->dev, "clock rate mismatch\n");
goto err0;
}
dev_dbg(&p->pdev->dev, "rate = %lu, prescaler %u\n",
rate, prescaler[k]);
/* clear TCNT on TGRB match, count on rising edge, set prescaler */
r_tpu_write(p, TCR, 0x0040 | k);
/* output 0 until TGRA, output 1 until TGRB */
r_tpu_write(p, TIOR, 0x0002);
rate /= prescaler[k] * p->refresh_rate;
r_tpu_write(p, TGRB, rate);
dev_dbg(&p->pdev->dev, "TRGB = 0x%04lx\n", rate);
tmp = (cfg->max_brightness - brightness) * rate;
r_tpu_write(p, TGRA, tmp / cfg->max_brightness);
dev_dbg(&p->pdev->dev, "TRGA = 0x%04lx\n", tmp / cfg->max_brightness);
/* PWM mode */
r_tpu_write(p, TMDR, 0x0002);
/* enable channel */
r_tpu_start_stop_ch(p, 1);
p->timer_state = R_TPU_TIMER_ON;
return 0;
err0:
clk_disable(p->clk);
pm_runtime_put_sync(&p->pdev->dev);
return -ENOTSUPP;
}
static void r_tpu_disable(struct r_tpu_priv *p)
{
if (p->timer_state == R_TPU_TIMER_UNUSED)
return;
/* disable channel */
r_tpu_start_stop_ch(p, 0);
/* stop clock and mark device as idle */
clk_disable(p->clk);
pm_runtime_put_sync(&p->pdev->dev);
p->timer_state = R_TPU_TIMER_UNUSED;
}
static void r_tpu_set_pin(struct r_tpu_priv *p, enum r_tpu_pin new_state,
enum led_brightness brightness)
{
struct led_renesas_tpu_config *cfg = p->pdev->dev.platform_data;
if (p->pin_state == new_state) {
if (p->pin_state == R_TPU_PIN_GPIO)
gpio_set_value(cfg->pin_gpio, brightness);
return;
}
if (p->pin_state == R_TPU_PIN_GPIO)
gpio_free(cfg->pin_gpio);
if (p->pin_state == R_TPU_PIN_GPIO_FN)
gpio_free(cfg->pin_gpio_fn);
if (new_state == R_TPU_PIN_GPIO)
gpio_request_one(cfg->pin_gpio, !!brightness ?
GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
cfg->name);
if (new_state == R_TPU_PIN_GPIO_FN)
gpio_request(cfg->pin_gpio_fn, cfg->name);
p->pin_state = new_state;
}
static void r_tpu_work(struct work_struct *work)
{
struct r_tpu_priv *p = container_of(work, struct r_tpu_priv, work);
enum led_brightness brightness = p->new_brightness;
r_tpu_disable(p);
/* off and maximum are handled as GPIO pins, in between PWM */
if ((brightness == 0) || (brightness == p->ldev.max_brightness))
r_tpu_set_pin(p, R_TPU_PIN_GPIO, brightness);
else {
r_tpu_set_pin(p, R_TPU_PIN_GPIO_FN, 0);
r_tpu_enable(p, brightness);
}
}
static void r_tpu_set_brightness(struct led_classdev *ldev,
enum led_brightness brightness)
{
struct r_tpu_priv *p = container_of(ldev, struct r_tpu_priv, ldev);
p->new_brightness = brightness;
schedule_work(&p->work);
}
static int r_tpu_probe(struct platform_device *pdev)
{
struct led_renesas_tpu_config *cfg = pdev->dev.platform_data;
struct r_tpu_priv *p;
struct resource *res;
int ret;
if (!cfg) {
dev_err(&pdev->dev, "missing platform data\n");
return -ENODEV;
}
p = devm_kzalloc(&pdev->dev, sizeof(*p), GFP_KERNEL);
if (p == NULL) {
dev_err(&pdev->dev, "failed to allocate driver data\n");
return -ENOMEM;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&pdev->dev, "failed to get I/O memory\n");
return -ENXIO;
}
/* map memory, let mapbase point to our channel */
p->mapbase = devm_ioremap_nocache(&pdev->dev, res->start,
resource_size(res));
if (p->mapbase == NULL) {
dev_err(&pdev->dev, "failed to remap I/O memory\n");
return -ENXIO;
}
/* get hold of clock */
p->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(p->clk)) {
dev_err(&pdev->dev, "cannot get clock\n");
return PTR_ERR(p->clk);
}
p->pdev = pdev;
p->pin_state = R_TPU_PIN_UNUSED;
p->timer_state = R_TPU_TIMER_UNUSED;
p->refresh_rate = cfg->refresh_rate ? cfg->refresh_rate : 100;
r_tpu_set_pin(p, R_TPU_PIN_GPIO, LED_OFF);
platform_set_drvdata(pdev, p);
INIT_WORK(&p->work, r_tpu_work);
p->ldev.name = cfg->name;
p->ldev.brightness = LED_OFF;
p->ldev.max_brightness = cfg->max_brightness;
p->ldev.brightness_set = r_tpu_set_brightness;
p->ldev.flags |= LED_CORE_SUSPENDRESUME;
ret = led_classdev_register(&pdev->dev, &p->ldev);
if (ret < 0)
goto err0;
/* max_brightness may be updated by the LED core code */
p->min_rate = p->ldev.max_brightness * p->refresh_rate;
pm_runtime_enable(&pdev->dev);
return 0;
err0:
r_tpu_set_pin(p, R_TPU_PIN_UNUSED, LED_OFF);
return ret;
}
static int r_tpu_remove(struct platform_device *pdev)
{
struct r_tpu_priv *p = platform_get_drvdata(pdev);
r_tpu_set_brightness(&p->ldev, LED_OFF);
led_classdev_unregister(&p->ldev);
cancel_work_sync(&p->work);
r_tpu_disable(p);
r_tpu_set_pin(p, R_TPU_PIN_UNUSED, LED_OFF);
pm_runtime_disable(&pdev->dev);
return 0;
}
static struct platform_driver r_tpu_device_driver = {
.probe = r_tpu_probe,
.remove = r_tpu_remove,
.driver = {
.name = "leds-renesas-tpu",
}
};
module_platform_driver(r_tpu_device_driver);
MODULE_AUTHOR("Magnus Damm");
MODULE_DESCRIPTION("Renesas TPU LED Driver");
MODULE_LICENSE("GPL v2");