Merge branches 'pxa-misc', 'pxa-pwm' and 'pxa-multi' into pxa
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index b786e68..c274dbb 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -22,6 +22,9 @@
Europe. There is an ARM Linux project with a web page at
<http://www.arm.linux.org.uk/>.
+config HAVE_PWM
+ bool
+
config SYS_SUPPORTS_APM_EMULATION
bool
diff --git a/arch/arm/mach-pxa/Kconfig b/arch/arm/mach-pxa/Kconfig
index caccbbc..914bb33 100644
--- a/arch/arm/mach-pxa/Kconfig
+++ b/arch/arm/mach-pxa/Kconfig
@@ -36,10 +36,12 @@
config MACH_LOGICPD_PXA270
bool "LogicPD PXA270 Card Engine Development Platform"
select PXA27x
+ select HAVE_PWM
config MACH_MAINSTONE
bool "Intel HCDDBBVA0 Development Platform"
select PXA27x
+ select HAVE_PWM
config ARCH_PXA_IDP
bool "Accelent Xscale IDP"
@@ -115,6 +117,7 @@
config MACH_ZYLONITE
bool "PXA3xx Development Platform"
select PXA3xx
+ select HAVE_PWM
config MACH_LITTLETON
bool "PXA3xx Form Factor Platform (aka Littleton)"
@@ -145,6 +148,22 @@
config MACH_PCM990_BASEBOARD
bool "PHYTEC PCM-990 development board"
+ select HAVE_PWM
+
+endchoice
+
+choice
+ prompt "display on pcm990"
+ depends on MACH_PCM990_BASEBOARD
+
+config PCM990_DISPLAY_SHARP
+ bool "sharp lq084v1dg21 stn display"
+
+config PCM990_DISPLAY_NEC
+ bool "nec nl6448bc20_18d tft display"
+
+config PCM990_DISPLAY_NONE
+ bool "no display"
endchoice
@@ -263,4 +282,10 @@
tristate
help
Enable support for PXA2xx SSP ports
+
+config PXA_PWM
+ tristate
+ default BACKLIGHT_PWM
+ help
+ Enable support for PXA2xx/PXA3xx PWM controllers
endif
diff --git a/arch/arm/mach-pxa/Makefile b/arch/arm/mach-pxa/Makefile
index 0e6d05b..02cbc3c 100644
--- a/arch/arm/mach-pxa/Makefile
+++ b/arch/arm/mach-pxa/Makefile
@@ -10,6 +10,7 @@
# Generic drivers that other drivers may depend upon
obj-$(CONFIG_PXA_SSP) += ssp.o
+obj-$(CONFIG_PXA_PWM) += pwm.o
# SoC-specific code
obj-$(CONFIG_PXA25x) += mfp-pxa2xx.o pxa25x.o
diff --git a/arch/arm/mach-pxa/clock.c b/arch/arm/mach-pxa/clock.c
index 180c8bb..b4d0495 100644
--- a/arch/arm/mach-pxa/clock.c
+++ b/arch/arm/mach-pxa/clock.c
@@ -47,6 +47,9 @@
clk = p;
mutex_unlock(&clocks_mutex);
+ if (!IS_ERR(clk) && clk->ops == NULL)
+ clk = clk->other;
+
return clk;
}
EXPORT_SYMBOL(clk_get);
diff --git a/arch/arm/mach-pxa/clock.h b/arch/arm/mach-pxa/clock.h
index bc6b77e..83cbfab 100644
--- a/arch/arm/mach-pxa/clock.h
+++ b/arch/arm/mach-pxa/clock.h
@@ -15,6 +15,7 @@
unsigned int cken;
unsigned int delay;
unsigned int enabled;
+ struct clk *other;
};
#define INIT_CKEN(_name, _cken, _rate, _delay, _dev) \
@@ -35,6 +36,17 @@
.cken = CKEN_##_cken, \
}
+/*
+ * This is a placeholder to alias one clock device+name pair
+ * to another struct clk.
+ */
+#define INIT_CKOTHER(_name, _other, _dev) \
+ { \
+ .name = _name, \
+ .dev = _dev, \
+ .other = _other, \
+ }
+
extern const struct clkops clk_cken_ops;
void clk_cken_enable(struct clk *clk);
diff --git a/arch/arm/mach-pxa/devices.c b/arch/arm/mach-pxa/devices.c
index af6cc3d..4a1eebb 100644
--- a/arch/arm/mach-pxa/devices.c
+++ b/arch/arm/mach-pxa/devices.c
@@ -289,6 +289,36 @@
#ifdef CONFIG_PXA25x
+static struct resource pxa25x_resource_pwm0[] = {
+ [0] = {
+ .start = 0x40b00000,
+ .end = 0x40b0000f,
+ .flags = IORESOURCE_MEM,
+ },
+};
+
+struct platform_device pxa25x_device_pwm0 = {
+ .name = "pxa25x-pwm",
+ .id = 0,
+ .resource = pxa25x_resource_pwm0,
+ .num_resources = ARRAY_SIZE(pxa25x_resource_pwm0),
+};
+
+static struct resource pxa25x_resource_pwm1[] = {
+ [0] = {
+ .start = 0x40c00000,
+ .end = 0x40c0000f,
+ .flags = IORESOURCE_MEM,
+ },
+};
+
+struct platform_device pxa25x_device_pwm1 = {
+ .name = "pxa25x-pwm",
+ .id = 1,
+ .resource = pxa25x_resource_pwm1,
+ .num_resources = ARRAY_SIZE(pxa25x_resource_pwm1),
+};
+
static u64 pxa25x_ssp_dma_mask = DMA_BIT_MASK(32);
static struct resource pxa25x_resource_ssp[] = {
@@ -577,6 +607,36 @@
.num_resources = ARRAY_SIZE(pxa27x_resource_ssp3),
};
+static struct resource pxa27x_resource_pwm0[] = {
+ [0] = {
+ .start = 0x40b00000,
+ .end = 0x40b0001f,
+ .flags = IORESOURCE_MEM,
+ },
+};
+
+struct platform_device pxa27x_device_pwm0 = {
+ .name = "pxa27x-pwm",
+ .id = 0,
+ .resource = pxa27x_resource_pwm0,
+ .num_resources = ARRAY_SIZE(pxa27x_resource_pwm0),
+};
+
+static struct resource pxa27x_resource_pwm1[] = {
+ [0] = {
+ .start = 0x40c00000,
+ .end = 0x40c0001f,
+ .flags = IORESOURCE_MEM,
+ },
+};
+
+struct platform_device pxa27x_device_pwm1 = {
+ .name = "pxa27x-pwm",
+ .id = 1,
+ .resource = pxa27x_resource_pwm1,
+ .num_resources = ARRAY_SIZE(pxa27x_resource_pwm1),
+};
+
static struct resource pxa27x_resource_camera[] = {
[0] = {
.start = 0x50000000,
diff --git a/arch/arm/mach-pxa/devices.h b/arch/arm/mach-pxa/devices.h
index fcab017..e620a33 100644
--- a/arch/arm/mach-pxa/devices.h
+++ b/arch/arm/mach-pxa/devices.h
@@ -24,4 +24,9 @@
extern struct platform_device pxa27x_device_ssp3;
extern struct platform_device pxa3xx_device_ssp4;
+extern struct platform_device pxa25x_device_pwm0;
+extern struct platform_device pxa25x_device_pwm1;
+extern struct platform_device pxa27x_device_pwm0;
+extern struct platform_device pxa27x_device_pwm1;
+
void __init pxa_register_device(struct platform_device *dev, void *data);
diff --git a/arch/arm/mach-pxa/irq.c b/arch/arm/mach-pxa/irq.c
index a9a0c3f..fbff557 100644
--- a/arch/arm/mach-pxa/irq.c
+++ b/arch/arm/mach-pxa/irq.c
@@ -21,7 +21,6 @@
#include <asm/irq.h>
#include <asm/mach/irq.h>
#include <asm/arch/pxa-regs.h>
-#include <asm/arch/pxa2xx-gpio.h>
#include "generic.h"
diff --git a/arch/arm/mach-pxa/lpd270.c b/arch/arm/mach-pxa/lpd270.c
index 6fd7b8b..183b587 100644
--- a/arch/arm/mach-pxa/lpd270.c
+++ b/arch/arm/mach-pxa/lpd270.c
@@ -23,6 +23,7 @@
#include <linux/ioport.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
+#include <linux/pwm_backlight.h>
#include <asm/types.h>
#include <asm/setup.h>
@@ -236,21 +237,20 @@
},
};
-static void lpd270_backlight_power(int on)
-{
- if (on) {
- pxa_gpio_mode(GPIO16_PWM0_MD);
- pxa_set_cken(CKEN_PWM0, 1);
- PWM_CTRL0 = 0;
- PWM_PWDUTY0 = 0x3ff;
- PWM_PERVAL0 = 0x3ff;
- } else {
- PWM_CTRL0 = 0;
- PWM_PWDUTY0 = 0x0;
- PWM_PERVAL0 = 0x3FF;
- pxa_set_cken(CKEN_PWM0, 0);
- }
-}
+static struct platform_pwm_backlight_data lpd270_backlight_data = {
+ .pwm_id = 0,
+ .max_brightness = 1,
+ .dft_brightness = 1,
+ .pwm_period_ns = 78770,
+};
+
+static struct platform_device lpd270_backlight_device = {
+ .name = "pwm-backlight",
+ .dev = {
+ .parent = &pxa27x_device_pwm0.dev,
+ .platform_data = &lpd270_backlight_data,
+ },
+};
/* 5.7" TFT QVGA (LoLo display number 1) */
static struct pxafb_mode_info sharp_lq057q3dc02_mode = {
@@ -272,7 +272,6 @@
.num_modes = 1,
.lccr0 = 0x07800080,
.lccr3 = 0x00400000,
- .pxafb_backlight_power = lpd270_backlight_power,
};
/* 12.1" TFT SVGA (LoLo display number 2) */
@@ -295,7 +294,6 @@
.num_modes = 1,
.lccr0 = 0x07800080,
.lccr3 = 0x00400000,
- .pxafb_backlight_power = lpd270_backlight_power,
};
/* 3.6" TFT QVGA (LoLo display number 3) */
@@ -318,7 +316,6 @@
.num_modes = 1,
.lccr0 = 0x07800080,
.lccr3 = 0x00400000,
- .pxafb_backlight_power = lpd270_backlight_power,
};
/* 6.4" TFT VGA (LoLo display number 5) */
@@ -341,7 +338,6 @@
.num_modes = 1,
.lccr0 = 0x07800080,
.lccr3 = 0x00400000,
- .pxafb_backlight_power = lpd270_backlight_power,
};
/* 10.4" TFT VGA (LoLo display number 7) */
@@ -364,7 +360,6 @@
.num_modes = 1,
.lccr0 = 0x07800080,
.lccr3 = 0x00400000,
- .pxafb_backlight_power = lpd270_backlight_power,
};
/* 3.5" TFT QVGA (LoLo display number 8) */
@@ -387,7 +382,6 @@
.num_modes = 1,
.lccr0 = 0x07800080,
.lccr3 = 0x00400000,
- .pxafb_backlight_power = lpd270_backlight_power,
};
static struct pxafb_mach_info *lpd270_lcd_to_use;
@@ -417,6 +411,7 @@
static struct platform_device *platform_devices[] __initdata = {
&smc91x_device,
+ &lpd270_backlight_device,
&lpd270_audio_device,
&lpd270_flash_device[0],
&lpd270_flash_device[1],
@@ -457,6 +452,7 @@
* On LogicPD PXA270, we route AC97_SYSCLK via GPIO45.
*/
pxa_gpio_mode(GPIO45_SYSCLK_AC97_MD);
+ pxa_gpio_mode(GPIO16_PWM0_MD);
platform_add_devices(platform_devices, ARRAY_SIZE(platform_devices));
diff --git a/arch/arm/mach-pxa/magician.c b/arch/arm/mach-pxa/magician.c
index b94cae4..01b2fa7 100644
--- a/arch/arm/mach-pxa/magician.c
+++ b/arch/arm/mach-pxa/magician.c
@@ -25,6 +25,7 @@
#include <linux/mtd/map.h>
#include <linux/mtd/physmap.h>
#include <linux/pda_power.h>
+#include <linux/pwm_backlight.h>
#include <asm/gpio.h>
#include <asm/hardware.h>
@@ -40,6 +41,7 @@
#include <asm/arch/irda.h>
#include <asm/arch/ohci.h>
+#include "devices.h"
#include "generic.h"
static unsigned long magician_pin_config[] = {
@@ -349,40 +351,58 @@
* Backlight
*/
-static void magician_set_bl_intensity(int intensity)
+static int magician_backlight_init(struct device *dev)
{
- if (intensity) {
- PWM_CTRL0 = 1;
- PWM_PERVAL0 = 0xc8;
- if (intensity > 0xc7) {
- PWM_PWDUTY0 = intensity - 0x48;
- gpio_set_value(EGPIO_MAGICIAN_BL_POWER2, 1);
- } else {
- PWM_PWDUTY0 = intensity;
- gpio_set_value(EGPIO_MAGICIAN_BL_POWER2, 0);
- }
- gpio_set_value(EGPIO_MAGICIAN_BL_POWER, 1);
- pxa_set_cken(CKEN_PWM0, 1);
+ int ret;
+
+ ret = gpio_request(EGPIO_MAGICIAN_BL_POWER, "BL_POWER");
+ if (ret)
+ goto err;
+ ret = gpio_request(EGPIO_MAGICIAN_BL_POWER2, "BL_POWER2");
+ if (ret)
+ goto err2;
+ return 0;
+
+err2:
+ gpio_free(EGPIO_MAGICIAN_BL_POWER);
+err:
+ return ret;
+}
+
+static int magician_backlight_notify(int brightness)
+{
+ gpio_set_value(EGPIO_MAGICIAN_BL_POWER, brightness);
+ if (brightness >= 200) {
+ gpio_set_value(EGPIO_MAGICIAN_BL_POWER2, 1);
+ return brightness - 72;
} else {
- /* PWM_PWDUTY0 = intensity; */
- gpio_set_value(EGPIO_MAGICIAN_BL_POWER, 0);
- pxa_set_cken(CKEN_PWM0, 0);
+ gpio_set_value(EGPIO_MAGICIAN_BL_POWER2, 0);
+ return brightness;
}
}
-static struct generic_bl_info backlight_info = {
- .default_intensity = 0x64,
- .limit_mask = 0x0b,
- .max_intensity = 0xc7+0x48,
- .set_bl_intensity = magician_set_bl_intensity,
+static void magician_backlight_exit(struct device *dev)
+{
+ gpio_free(EGPIO_MAGICIAN_BL_POWER);
+ gpio_free(EGPIO_MAGICIAN_BL_POWER2);
+}
+
+static struct platform_pwm_backlight_data backlight_data = {
+ .pwm_id = 0,
+ .max_brightness = 272,
+ .dft_brightness = 100,
+ .pwm_period_ns = 30923,
+ .init = magician_backlight_init,
+ .notify = magician_backlight_notify,
+ .exit = magician_backlight_exit,
};
static struct platform_device backlight = {
- .name = "generic-bl",
+ .name = "pwm-backlight",
.dev = {
- .platform_data = &backlight_info,
+ .parent = &pxa27x_device_pwm0.dev,
+ .platform_data = &backlight_data,
},
- .id = -1,
};
/*
diff --git a/arch/arm/mach-pxa/mainstone.c b/arch/arm/mach-pxa/mainstone.c
index 7399fb3..2665944 100644
--- a/arch/arm/mach-pxa/mainstone.c
+++ b/arch/arm/mach-pxa/mainstone.c
@@ -23,9 +23,9 @@
#include <linux/ioport.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
-#include <linux/backlight.h>
#include <linux/input.h>
#include <linux/gpio_keys.h>
+#include <linux/pwm_backlight.h>
#include <asm/types.h>
#include <asm/setup.h>
@@ -349,56 +349,27 @@
},
};
-#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
-static int mainstone_backlight_update_status(struct backlight_device *bl)
-{
- int brightness = bl->props.brightness;
+#if defined(CONFIG_FB_PXA) || defined(CONFIG_FB_PXA_MODULE)
+static struct platform_pwm_backlight_data mainstone_backlight_data = {
+ .pwm_id = 0,
+ .max_brightness = 1023,
+ .dft_brightness = 1023,
+ .pwm_period_ns = 78770,
+};
- if (bl->props.power != FB_BLANK_UNBLANK ||
- bl->props.fb_blank != FB_BLANK_UNBLANK)
- brightness = 0;
-
- if (brightness != 0)
- pxa_set_cken(CKEN_PWM0, 1);
-
- PWM_CTRL0 = 0;
- PWM_PWDUTY0 = brightness;
- PWM_PERVAL0 = bl->props.max_brightness;
-
- if (brightness == 0)
- pxa_set_cken(CKEN_PWM0, 0);
- return 0; /* pointless return value */
-}
-
-static int mainstone_backlight_get_brightness(struct backlight_device *bl)
-{
- return PWM_PWDUTY0;
-}
-
-static /*const*/ struct backlight_ops mainstone_backlight_ops = {
- .update_status = mainstone_backlight_update_status,
- .get_brightness = mainstone_backlight_get_brightness,
+static struct platform_device mainstone_backlight_device = {
+ .name = "pwm-backlight",
+ .dev = {
+ .parent = &pxa27x_device_pwm0.dev,
+ .platform_data = &mainstone_backlight_data,
+ },
};
static void __init mainstone_backlight_register(void)
{
- struct backlight_device *bl;
-
- bl = backlight_device_register("mainstone-bl", &pxa_device_fb.dev,
- NULL, &mainstone_backlight_ops);
- if (IS_ERR(bl)) {
- printk(KERN_ERR "mainstone: unable to register backlight: %ld\n",
- PTR_ERR(bl));
- return;
- }
-
- /*
- * broken design - register-then-setup interfaces are
- * utterly broken by definition.
- */
- bl->props.max_brightness = 1023;
- bl->props.brightness = 1023;
- backlight_update_status(bl);
+ int ret = platform_device_register(&mainstone_backlight_device);
+ if (ret)
+ printk(KERN_ERR "mainstone: failed to register backlight device: %d\n", ret);
}
#else
#define mainstone_backlight_register() do { } while (0)
diff --git a/arch/arm/mach-pxa/pcm990-baseboard.c b/arch/arm/mach-pxa/pcm990-baseboard.c
index 49d951d..2564e16 100644
--- a/arch/arm/mach-pxa/pcm990-baseboard.c
+++ b/arch/arm/mach-pxa/pcm990-baseboard.c
@@ -24,6 +24,7 @@
#include <linux/platform_device.h>
#include <linux/ide.h>
#include <linux/i2c.h>
+#include <linux/pwm_backlight.h>
#include <media/soc_camera.h>
@@ -36,9 +37,99 @@
#include <asm/arch/mmc.h>
#include <asm/arch/ohci.h>
#include <asm/arch/pcm990_baseboard.h>
+#include <asm/arch/pxafb.h>
+
+#include "devices.h"
/*
- * The PCM-990 development baseboard uses PCM-027's hardeware in the
+ * pcm990_lcd_power - control power supply to the LCD
+ * @on: 0 = switch off, 1 = switch on
+ *
+ * Called by the pxafb driver
+ */
+#ifndef CONFIG_PCM990_DISPLAY_NONE
+static void pcm990_lcd_power(int on, struct fb_var_screeninfo *var)
+{
+ if (on) {
+ /* enable LCD-Latches
+ * power on LCD
+ */
+ __PCM990_CTRL_REG(PCM990_CTRL_PHYS + PCM990_CTRL_REG3) =
+ PCM990_CTRL_LCDPWR + PCM990_CTRL_LCDON;
+ } else {
+ /* disable LCD-Latches
+ * power off LCD
+ */
+ __PCM990_CTRL_REG(PCM990_CTRL_PHYS + PCM990_CTRL_REG3) = 0x00;
+ }
+}
+#endif
+
+#if defined(CONFIG_PCM990_DISPLAY_SHARP)
+static struct pxafb_mode_info fb_info_sharp_lq084v1dg21 = {
+ .pixclock = 28000,
+ .xres = 640,
+ .yres = 480,
+ .bpp = 16,
+ .hsync_len = 20,
+ .left_margin = 103,
+ .right_margin = 47,
+ .vsync_len = 6,
+ .upper_margin = 28,
+ .lower_margin = 5,
+ .sync = 0,
+ .cmap_greyscale = 0,
+};
+
+static struct pxafb_mach_info pcm990_fbinfo __initdata = {
+ .modes = &fb_info_sharp_lq084v1dg21,
+ .num_modes = 1,
+ .lccr0 = LCCR0_PAS,
+ .lccr3 = LCCR3_PCP,
+ .pxafb_lcd_power = pcm990_lcd_power,
+};
+#elif defined(CONFIG_PCM990_DISPLAY_NEC)
+struct pxafb_mode_info fb_info_nec_nl6448bc20_18d = {
+ .pixclock = 39720,
+ .xres = 640,
+ .yres = 480,
+ .bpp = 16,
+ .hsync_len = 32,
+ .left_margin = 16,
+ .right_margin = 48,
+ .vsync_len = 2,
+ .upper_margin = 12,
+ .lower_margin = 17,
+ .sync = 0,
+ .cmap_greyscale = 0,
+};
+
+static struct pxafb_mach_info pcm990_fbinfo __initdata = {
+ .modes = &fb_info_nec_nl6448bc20_18d,
+ .num_modes = 1,
+ .lccr0 = LCCR0_Act,
+ .lccr3 = LCCR3_PixFlEdg,
+ .pxafb_lcd_power = pcm990_lcd_power,
+};
+#endif
+
+static struct platform_pwm_backlight_data pcm990_backlight_data = {
+ .pwm_id = 0,
+ .max_brightness = 1023,
+ .dft_brightness = 1023,
+ .pwm_period_ns = 78770,
+};
+
+static struct platform_device pcm990_backlight_device = {
+ .name = "pwm-backlight",
+ .dev = {
+ .parent = &pxa27x_device_pwm0.dev,
+ .platform_data = &pcm990_backlight_data,
+ },
+};
+
+/*
+ * The PCM-990 development baseboard uses PCM-027's hardware in the
* following way:
*
* - LCD support is in use
@@ -393,6 +484,12 @@
/* register CPLD's IRQ controller */
pcm990_init_irq();
+#ifndef CONFIG_PCM990_DISPLAY_NONE
+ set_pxa_fb_info(&pcm990_fbinfo);
+#endif
+ pxa_gpio_mode(GPIO16_PWM0_MD);
+ platform_device_register(&pcm990_backlight_device);
+
platform_device_register(&pxa27x_device_ac97);
/* MMC */
diff --git a/arch/arm/mach-pxa/pwm.c b/arch/arm/mach-pxa/pwm.c
new file mode 100644
index 0000000..ce28cd9
--- /dev/null
+++ b/arch/arm/mach-pxa/pwm.c
@@ -0,0 +1,319 @@
+/*
+ * linux/arch/arm/mach-pxa/pwm.c
+ *
+ * simple driver for PWM (Pulse Width Modulator) controller
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 2008-02-13 initial version
+ * eric miao <eric.miao@marvell.com>
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/pwm.h>
+
+#include <asm/div64.h>
+#include <asm/arch/pxa-regs.h>
+
+/* PWM registers and bits definitions */
+#define PWMCR (0x00)
+#define PWMDCR (0x04)
+#define PWMPCR (0x08)
+
+#define PWMCR_SD (1 << 6)
+#define PWMDCR_FD (1 << 10)
+
+struct pwm_device {
+ struct list_head node;
+ struct platform_device *pdev;
+
+ const char *label;
+ struct clk *clk;
+ int clk_enabled;
+ void __iomem *mmio_base;
+
+ unsigned int use_count;
+ unsigned int pwm_id;
+};
+
+/*
+ * period_ns = 10^9 * (PRESCALE + 1) * (PV + 1) / PWM_CLK_RATE
+ * duty_ns = 10^9 * (PRESCALE + 1) * DC / PWM_CLK_RATE
+ */
+int pwm_config(struct pwm_device *pwm, int duty_ns, int period_ns)
+{
+ unsigned long long c;
+ unsigned long period_cycles, prescale, pv, dc;
+
+ if (pwm == NULL || period_ns == 0 || duty_ns > period_ns)
+ return -EINVAL;
+
+ c = clk_get_rate(pwm->clk);
+ c = c * period_ns;
+ do_div(c, 1000000000);
+ period_cycles = c;
+
+ if (period_cycles < 0)
+ period_cycles = 1;
+ prescale = (period_cycles - 1) / 1024;
+ pv = period_cycles / (prescale + 1) - 1;
+
+ if (prescale > 63)
+ return -EINVAL;
+
+ if (duty_ns == period_ns)
+ dc = PWMDCR_FD;
+ else
+ dc = (pv + 1) * duty_ns / period_ns;
+
+ /* NOTE: the clock to PWM has to be enabled first
+ * before writing to the registers
+ */
+ clk_enable(pwm->clk);
+ __raw_writel(prescale, pwm->mmio_base + PWMCR);
+ __raw_writel(dc, pwm->mmio_base + PWMDCR);
+ __raw_writel(pv, pwm->mmio_base + PWMPCR);
+ clk_disable(pwm->clk);
+
+ return 0;
+}
+EXPORT_SYMBOL(pwm_config);
+
+int pwm_enable(struct pwm_device *pwm)
+{
+ int rc = 0;
+
+ if (!pwm->clk_enabled) {
+ rc = clk_enable(pwm->clk);
+ if (!rc)
+ pwm->clk_enabled = 1;
+ }
+ return rc;
+}
+EXPORT_SYMBOL(pwm_enable);
+
+void pwm_disable(struct pwm_device *pwm)
+{
+ if (pwm->clk_enabled) {
+ clk_disable(pwm->clk);
+ pwm->clk_enabled = 0;
+ }
+}
+EXPORT_SYMBOL(pwm_disable);
+
+static DEFINE_MUTEX(pwm_lock);
+static LIST_HEAD(pwm_list);
+
+struct pwm_device *pwm_request(int pwm_id, const char *label)
+{
+ struct pwm_device *pwm;
+ int found = 0;
+
+ mutex_lock(&pwm_lock);
+
+ list_for_each_entry(pwm, &pwm_list, node) {
+ if (pwm->pwm_id == pwm_id) {
+ found = 1;
+ break;
+ }
+ }
+
+ if (found) {
+ if (pwm->use_count == 0) {
+ pwm->use_count++;
+ pwm->label = label;
+ } else
+ pwm = ERR_PTR(-EBUSY);
+ } else
+ pwm = ERR_PTR(-ENOENT);
+
+ mutex_unlock(&pwm_lock);
+ return pwm;
+}
+EXPORT_SYMBOL(pwm_request);
+
+void pwm_free(struct pwm_device *pwm)
+{
+ mutex_lock(&pwm_lock);
+
+ if (pwm->use_count) {
+ pwm->use_count--;
+ pwm->label = NULL;
+ } else
+ pr_warning("PWM device already freed\n");
+
+ mutex_unlock(&pwm_lock);
+}
+EXPORT_SYMBOL(pwm_free);
+
+static inline void __add_pwm(struct pwm_device *pwm)
+{
+ mutex_lock(&pwm_lock);
+ list_add_tail(&pwm->node, &pwm_list);
+ mutex_unlock(&pwm_lock);
+}
+
+static struct pwm_device *pwm_probe(struct platform_device *pdev,
+ unsigned int pwm_id, struct pwm_device *parent_pwm)
+{
+ struct pwm_device *pwm;
+ struct resource *r;
+ int ret = 0;
+
+ pwm = kzalloc(sizeof(struct pwm_device), GFP_KERNEL);
+ if (pwm == NULL) {
+ dev_err(&pdev->dev, "failed to allocate memory\n");
+ return ERR_PTR(-ENOMEM);
+ }
+
+ pwm->clk = clk_get(&pdev->dev, "PWMCLK");
+ if (IS_ERR(pwm->clk)) {
+ ret = PTR_ERR(pwm->clk);
+ goto err_free;
+ }
+ pwm->clk_enabled = 0;
+
+ pwm->use_count = 0;
+ pwm->pwm_id = pwm_id;
+ pwm->pdev = pdev;
+
+ if (parent_pwm != NULL) {
+ /* registers for the second PWM has offset of 0x10 */
+ pwm->mmio_base = parent_pwm->mmio_base + 0x10;
+ __add_pwm(pwm);
+ return pwm;
+ }
+
+ r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (r == NULL) {
+ dev_err(&pdev->dev, "no memory resource defined\n");
+ ret = -ENODEV;
+ goto err_free_clk;
+ }
+
+ r = request_mem_region(r->start, r->end - r->start + 1, pdev->name);
+ if (r == NULL) {
+ dev_err(&pdev->dev, "failed to request memory resource\n");
+ ret = -EBUSY;
+ goto err_free_clk;
+ }
+
+ pwm->mmio_base = ioremap(r->start, r->end - r->start + 1);
+ if (pwm->mmio_base == NULL) {
+ dev_err(&pdev->dev, "failed to ioremap() registers\n");
+ ret = -ENODEV;
+ goto err_free_mem;
+ }
+
+ __add_pwm(pwm);
+ platform_set_drvdata(pdev, pwm);
+ return pwm;
+
+err_free_mem:
+ release_mem_region(r->start, r->end - r->start + 1);
+err_free_clk:
+ clk_put(pwm->clk);
+err_free:
+ kfree(pwm);
+ return ERR_PTR(ret);
+}
+
+static int __devinit pxa25x_pwm_probe(struct platform_device *pdev)
+{
+ struct pwm_device *pwm = pwm_probe(pdev, pdev->id, NULL);
+
+ if (IS_ERR(pwm))
+ return PTR_ERR(pwm);
+
+ return 0;
+}
+
+static int __devinit pxa27x_pwm_probe(struct platform_device *pdev)
+{
+ struct pwm_device *pwm;
+
+ pwm = pwm_probe(pdev, pdev->id, NULL);
+ if (IS_ERR(pwm))
+ return PTR_ERR(pwm);
+
+ pwm = pwm_probe(pdev, pdev->id + 2, pwm);
+ if (IS_ERR(pwm))
+ return PTR_ERR(pwm);
+
+ return 0;
+}
+
+static int __devexit pwm_remove(struct platform_device *pdev)
+{
+ struct pwm_device *pwm;
+ struct resource *r;
+
+ pwm = platform_get_drvdata(pdev);
+ if (pwm == NULL)
+ return -ENODEV;
+
+ mutex_lock(&pwm_lock);
+ list_del(&pwm->node);
+ mutex_unlock(&pwm_lock);
+
+ iounmap(pwm->mmio_base);
+
+ r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ release_mem_region(r->start, r->end - r->start + 1);
+
+ clk_put(pwm->clk);
+ kfree(pwm);
+ return 0;
+}
+
+static struct platform_driver pxa25x_pwm_driver = {
+ .driver = {
+ .name = "pxa25x-pwm",
+ },
+ .probe = pxa25x_pwm_probe,
+ .remove = __devexit_p(pwm_remove),
+};
+
+static struct platform_driver pxa27x_pwm_driver = {
+ .driver = {
+ .name = "pxa27x-pwm",
+ },
+ .probe = pxa27x_pwm_probe,
+ .remove = __devexit_p(pwm_remove),
+};
+
+static int __init pwm_init(void)
+{
+ int ret = 0;
+
+ ret = platform_driver_register(&pxa25x_pwm_driver);
+ if (ret) {
+ printk(KERN_ERR "failed to register pxa25x_pwm_driver\n");
+ return ret;
+ }
+
+ ret = platform_driver_register(&pxa27x_pwm_driver);
+ if (ret) {
+ printk(KERN_ERR "failed to register pxa27x_pwm_driver\n");
+ return ret;
+ }
+
+ return ret;
+}
+arch_initcall(pwm_init);
+
+static void __exit pwm_exit(void)
+{
+ platform_driver_unregister(&pxa25x_pwm_driver);
+ platform_driver_unregister(&pxa27x_pwm_driver);
+}
+module_exit(pwm_exit);
+
+MODULE_LICENSE("GPL v2");
diff --git a/arch/arm/mach-pxa/pxa25x.c b/arch/arm/mach-pxa/pxa25x.c
index 3b848dc..a1a7dd2 100644
--- a/arch/arm/mach-pxa/pxa25x.c
+++ b/arch/arm/mach-pxa/pxa25x.c
@@ -118,6 +118,10 @@
INIT_CKEN("UARTCLK", HWUART, 14745600, 1, &pxa_device_hwuart.dev)
;
+/*
+ * PXA 2xx clock declarations. Order is important (see aliases below)
+ * Please be careful not to disrupt the ordering.
+ */
static struct clk pxa25x_clks[] = {
INIT_CK("LCDCLK", LCD, &clk_pxa25x_lcd_ops, &pxa_device_fb.dev),
INIT_CKEN("UARTCLK", FFUART, 14745600, 1, &pxa_device_ffuart.dev),
@@ -130,17 +134,19 @@
INIT_CKEN("SSPCLK", SSP, 3686400, 0, &pxa25x_device_ssp.dev),
INIT_CKEN("SSPCLK", NSSP, 3686400, 0, &pxa25x_device_nssp.dev),
INIT_CKEN("SSPCLK", ASSP, 3686400, 0, &pxa25x_device_assp.dev),
+ INIT_CKEN("PWMCLK", PWM0, 3686400, 0, &pxa25x_device_pwm0.dev),
+ INIT_CKEN("PWMCLK", PWM1, 3686400, 0, &pxa25x_device_pwm1.dev),
INIT_CKEN("AC97CLK", AC97, 24576000, 0, NULL),
/*
- INIT_CKEN("PWMCLK", PWM0, 3686400, 0, NULL),
- INIT_CKEN("PWMCLK", PWM0, 3686400, 0, NULL),
INIT_CKEN("I2SCLK", I2S, 14745600, 0, NULL),
*/
INIT_CKEN("FICPCLK", FICP, 47923000, 0, NULL),
};
+static struct clk gpio7_clk = INIT_CKOTHER("GPIO7_CK", &pxa25x_clks[4], NULL);
+
#ifdef CONFIG_PM
#define SAVE(x) sleep_save[SLEEP_SAVE_##x] = x
@@ -270,6 +276,8 @@
&pxa25x_device_ssp,
&pxa25x_device_nssp,
&pxa25x_device_assp,
+ &pxa25x_device_pwm0,
+ &pxa25x_device_pwm1,
};
static struct sys_device pxa25x_sysdev[] = {
@@ -312,6 +320,8 @@
if (cpu_is_pxa25x())
ret = platform_device_register(&pxa_device_hwuart);
+ clks_register(&gpio7_clk, 1);
+
return ret;
}
diff --git a/arch/arm/mach-pxa/pxa27x.c b/arch/arm/mach-pxa/pxa27x.c
index 48cbdc7..4d7afae 100644
--- a/arch/arm/mach-pxa/pxa27x.c
+++ b/arch/arm/mach-pxa/pxa27x.c
@@ -157,12 +157,13 @@
INIT_CKEN("SSPCLK", SSP1, 13000000, 0, &pxa27x_device_ssp1.dev),
INIT_CKEN("SSPCLK", SSP2, 13000000, 0, &pxa27x_device_ssp2.dev),
INIT_CKEN("SSPCLK", SSP3, 13000000, 0, &pxa27x_device_ssp3.dev),
+ INIT_CKEN("PWMCLK", PWM0, 13000000, 0, &pxa27x_device_pwm0.dev),
+ INIT_CKEN("PWMCLK", PWM1, 13000000, 0, &pxa27x_device_pwm1.dev),
INIT_CKEN("AC97CLK", AC97, 24576000, 0, NULL),
INIT_CKEN("AC97CONFCLK", AC97CONF, 24576000, 0, NULL),
/*
- INIT_CKEN("PWMCLK", PWM0, 13000000, 0, NULL),
INIT_CKEN("MSLCLK", MSL, 48000000, 0, NULL),
INIT_CKEN("USIMCLK", USIM, 48000000, 0, NULL),
INIT_CKEN("MSTKCLK", MEMSTK, 19500000, 0, NULL),
@@ -366,6 +367,8 @@
&pxa27x_device_ssp1,
&pxa27x_device_ssp2,
&pxa27x_device_ssp3,
+ &pxa27x_device_pwm0,
+ &pxa27x_device_pwm1,
};
static struct sys_device pxa27x_sysdev[] = {
diff --git a/arch/arm/mach-pxa/pxa3xx.c b/arch/arm/mach-pxa/pxa3xx.c
index 7fbe786..d26a9b0 100644
--- a/arch/arm/mach-pxa/pxa3xx.c
+++ b/arch/arm/mach-pxa/pxa3xx.c
@@ -239,6 +239,8 @@
PXA3xx_CKEN("SSPCLK", SSP2, 13000000, 0, &pxa27x_device_ssp2.dev),
PXA3xx_CKEN("SSPCLK", SSP3, 13000000, 0, &pxa27x_device_ssp3.dev),
PXA3xx_CKEN("SSPCLK", SSP4, 13000000, 0, &pxa3xx_device_ssp4.dev),
+ PXA3xx_CKEN("PWMCLK", PWM0, 13000000, 0, &pxa27x_device_pwm0.dev),
+ PXA3xx_CKEN("PWMCLK", PWM1, 13000000, 0, &pxa27x_device_pwm1.dev),
PXA3xx_CKEN("MMCCLK", MMC1, 19500000, 0, &pxa_device_mci.dev),
PXA3xx_CKEN("MMCCLK", MMC2, 19500000, 0, &pxa3xx_device_mci2.dev),
@@ -530,6 +532,8 @@
&pxa27x_device_ssp2,
&pxa27x_device_ssp3,
&pxa3xx_device_ssp4,
+ &pxa27x_device_pwm0,
+ &pxa27x_device_pwm1,
};
static struct sys_device pxa3xx_sysdev[] = {
diff --git a/arch/arm/mach-pxa/zylonite.c b/arch/arm/mach-pxa/zylonite.c
index 4a00280..b13bb93 100644
--- a/arch/arm/mach-pxa/zylonite.c
+++ b/arch/arm/mach-pxa/zylonite.c
@@ -18,6 +18,7 @@
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/platform_device.h>
+#include <linux/pwm_backlight.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
@@ -28,12 +29,12 @@
#include <asm/arch/mmc.h>
#include <asm/arch/pxa27x_keypad.h>
+#include "devices.h"
#include "generic.h"
#define MAX_SLOTS 3
struct platform_mmc_slot zylonite_mmc_slot[MAX_SLOTS];
-int gpio_backlight;
int gpio_eth_irq;
int wm9713_irq;
@@ -62,10 +63,20 @@
};
#if defined(CONFIG_FB_PXA) || defined(CONFIG_FB_PXA_MODULE)
-static void zylonite_backlight_power(int on)
-{
- gpio_set_value(gpio_backlight, on);
-}
+static struct platform_pwm_backlight_data zylonite_backlight_data = {
+ .pwm_id = 3,
+ .max_brightness = 100,
+ .dft_brightness = 100,
+ .pwm_period_ns = 10000,
+};
+
+static struct platform_device zylonite_backlight_device = {
+ .name = "pwm-backlight",
+ .dev = {
+ .parent = &pxa27x_device_pwm1.dev,
+ .platform_data = &zylonite_backlight_data,
+ },
+};
static struct pxafb_mode_info toshiba_ltm035a776c_mode = {
.pixclock = 110000,
@@ -98,7 +109,6 @@
static struct pxafb_mach_info zylonite_toshiba_lcd_info = {
.num_modes = 1,
.lcd_conn = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
- .pxafb_backlight_power = zylonite_backlight_power,
};
static struct pxafb_mode_info sharp_ls037_modes[] = {
@@ -134,13 +144,11 @@
.modes = sharp_ls037_modes,
.num_modes = 2,
.lcd_conn = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
- .pxafb_backlight_power = zylonite_backlight_power,
};
static void __init zylonite_init_lcd(void)
{
- /* backlight GPIO: output, default on */
- gpio_direction_output(gpio_backlight, 1);
+ platform_device_register(&zylonite_backlight_device);
if (lcd_id & 0x20) {
set_pxa_fb_info(&zylonite_sharp_lcd_info);
diff --git a/arch/arm/mach-pxa/zylonite_pxa300.c b/arch/arm/mach-pxa/zylonite_pxa300.c
index 324fb9d..6f7ae97 100644
--- a/arch/arm/mach-pxa/zylonite_pxa300.c
+++ b/arch/arm/mach-pxa/zylonite_pxa300.c
@@ -50,6 +50,7 @@
GPIO75_LCD_BIAS,
GPIO76_LCD_VSYNC,
GPIO127_LCD_CS_N,
+ GPIO20_PWM3_OUT, /* backlight */
/* BTUART */
GPIO111_UART2_RTS,
@@ -200,9 +201,6 @@
/* detect LCD panel */
zylonite_detect_lcd_panel();
- /* GPIO pin assignment */
- gpio_backlight = mfp_to_gpio(MFP_PIN_GPIO20);
-
/* MMC card detect & write protect for controller 0 */
zylonite_mmc_slot[0].gpio_cd = EXT_GPIO(0);
zylonite_mmc_slot[0].gpio_wp = EXT_GPIO(2);
diff --git a/arch/arm/mach-pxa/zylonite_pxa320.c b/arch/arm/mach-pxa/zylonite_pxa320.c
index 193d079..2b4fc34 100644
--- a/arch/arm/mach-pxa/zylonite_pxa320.c
+++ b/arch/arm/mach-pxa/zylonite_pxa320.c
@@ -49,6 +49,7 @@
GPIO15_2_LCD_LCLK,
GPIO16_2_LCD_PCLK,
GPIO17_2_LCD_BIAS,
+ GPIO14_PWM3_OUT, /* backlight */
/* FFUART */
GPIO41_UART1_RXD | MFP_LPM_EDGE_FALL,
@@ -187,7 +188,6 @@
zylonite_detect_lcd_panel();
/* GPIO pin assignment */
- gpio_backlight = mfp_to_gpio(MFP_PIN_GPIO14);
gpio_eth_irq = mfp_to_gpio(MFP_PIN_GPIO9);
/* MMC card detect & write protect for controller 0 */
diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c
index 9f61e9b..dde6ce9 100644
--- a/drivers/i2c/busses/i2c-pxa.c
+++ b/drivers/i2c/busses/i2c-pxa.c
@@ -39,7 +39,6 @@
#include <asm/io.h>
#include <asm/arch/i2c.h>
#include <asm/arch/pxa-regs.h>
-#include <asm/arch/pxa2xx-gpio.h>
struct pxa_i2c {
spinlock_t lock;
diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig
index dcd8073..30bf7f2 100644
--- a/drivers/video/backlight/Kconfig
+++ b/drivers/video/backlight/Kconfig
@@ -112,3 +112,10 @@
help
If you have a Intel LE80578 (Carillo Ranch) say Y to enable the
backlight driver.
+
+config BACKLIGHT_PWM
+ tristate "Generic PWM based Backlight Driver"
+ depends on BACKLIGHT_CLASS_DEVICE && HAVE_PWM
+ help
+ If you have a LCD backlight adjustable by PWM, say Y to enable
+ this driver.
diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile
index 33f6c7c..b51a7cd 100644
--- a/drivers/video/backlight/Makefile
+++ b/drivers/video/backlight/Makefile
@@ -10,3 +10,4 @@
obj-$(CONFIG_BACKLIGHT_OMAP1) += omap1_bl.o
obj-$(CONFIG_BACKLIGHT_PROGEAR) += progear_bl.o
obj-$(CONFIG_BACKLIGHT_CARILLO_RANCH) += cr_bllcd.o
+obj-$(CONFIG_BACKLIGHT_PWM) += pwm_bl.o
diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c
new file mode 100644
index 0000000..6338d0e
--- /dev/null
+++ b/drivers/video/backlight/pwm_bl.c
@@ -0,0 +1,185 @@
+/*
+ * linux/drivers/video/backlight/pwm_bl.c
+ *
+ * simple PWM based backlight control, board code has to setup
+ * 1) pin configuration so PWM waveforms can output
+ * 2) platform_data casts to the PWM id (0/1/2/3 on PXA)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/fb.h>
+#include <linux/backlight.h>
+#include <linux/err.h>
+#include <linux/pwm.h>
+#include <linux/pwm_backlight.h>
+
+struct pwm_bl_data {
+ struct pwm_device *pwm;
+ unsigned int period;
+ int (*notify)(int brightness);
+};
+
+static int pwm_backlight_update_status(struct backlight_device *bl)
+{
+ struct pwm_bl_data *pb = dev_get_drvdata(&bl->dev);
+ int brightness = bl->props.brightness;
+ int max = bl->props.max_brightness;
+
+ if (bl->props.power != FB_BLANK_UNBLANK)
+ brightness = 0;
+
+ if (bl->props.fb_blank != FB_BLANK_UNBLANK)
+ brightness = 0;
+
+ if (pb->notify)
+ brightness = pb->notify(brightness);
+
+ if (brightness == 0) {
+ pwm_config(pb->pwm, 0, pb->period);
+ pwm_disable(pb->pwm);
+ } else {
+ pwm_config(pb->pwm, brightness * pb->period / max, pb->period);
+ pwm_enable(pb->pwm);
+ }
+ return 0;
+}
+
+static int pwm_backlight_get_brightness(struct backlight_device *bl)
+{
+ return bl->props.brightness;
+}
+
+static struct backlight_ops pwm_backlight_ops = {
+ .update_status = pwm_backlight_update_status,
+ .get_brightness = pwm_backlight_get_brightness,
+};
+
+static int pwm_backlight_probe(struct platform_device *pdev)
+{
+ struct platform_pwm_backlight_data *data = pdev->dev.platform_data;
+ struct backlight_device *bl;
+ struct pwm_bl_data *pb;
+ int ret;
+
+ if (!data)
+ return -EINVAL;
+
+ if (data->init) {
+ ret = data->init(&pdev->dev);
+ if (ret < 0)
+ return ret;
+ }
+
+ pb = kzalloc(sizeof(*pb), GFP_KERNEL);
+ if (!pb) {
+ ret = -ENOMEM;
+ goto err_alloc;
+ }
+
+ pb->period = data->pwm_period_ns;
+ pb->notify = data->notify;
+
+ pb->pwm = pwm_request(data->pwm_id, "backlight");
+ if (IS_ERR(pb->pwm)) {
+ dev_err(&pdev->dev, "unable to request PWM for backlight\n");
+ ret = PTR_ERR(pb->pwm);
+ goto err_pwm;
+ }
+
+ bl = backlight_device_register(pdev->name, &pdev->dev,
+ pb, &pwm_backlight_ops);
+ if (IS_ERR(bl)) {
+ dev_err(&pdev->dev, "failed to register backlight\n");
+ ret = PTR_ERR(bl);
+ goto err_bl;
+ }
+
+ bl->props.max_brightness = data->max_brightness;
+ bl->props.brightness = data->dft_brightness;
+ backlight_update_status(bl);
+
+ platform_set_drvdata(pdev, bl);
+ return 0;
+
+err_bl:
+ pwm_free(pb->pwm);
+err_pwm:
+ kfree(pb);
+err_alloc:
+ if (data->exit)
+ data->exit(&pdev->dev);
+ return ret;
+}
+
+static int pwm_backlight_remove(struct platform_device *pdev)
+{
+ struct platform_pwm_backlight_data *data = pdev->dev.platform_data;
+ struct backlight_device *bl = platform_get_drvdata(pdev);
+ struct pwm_bl_data *pb = dev_get_drvdata(&bl->dev);
+
+ backlight_device_unregister(bl);
+ pwm_config(pb->pwm, 0, pb->period);
+ pwm_disable(pb->pwm);
+ pwm_free(pb->pwm);
+ kfree(pb);
+ if (data->exit)
+ data->exit(&pdev->dev);
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int pwm_backlight_suspend(struct platform_device *pdev,
+ pm_message_t state)
+{
+ struct backlight_device *bl = platform_get_drvdata(pdev);
+ struct pwm_bl_data *pb = dev_get_drvdata(&bl->dev);
+
+ pwm_config(pb->pwm, 0, pb->period);
+ pwm_disable(pb->pwm);
+ return 0;
+}
+
+static int pwm_backlight_resume(struct platform_device *pdev)
+{
+ struct backlight_device *bl = platform_get_drvdata(pdev);
+
+ backlight_update_status(bl);
+ return 0;
+}
+#else
+#define pwm_backlight_suspend NULL
+#define pwm_backlight_resume NULL
+#endif
+
+static struct platform_driver pwm_backlight_driver = {
+ .driver = {
+ .name = "pwm-backlight",
+ .owner = THIS_MODULE,
+ },
+ .probe = pwm_backlight_probe,
+ .remove = pwm_backlight_remove,
+ .suspend = pwm_backlight_suspend,
+ .resume = pwm_backlight_resume,
+};
+
+static int __init pwm_backlight_init(void)
+{
+ return platform_driver_register(&pwm_backlight_driver);
+}
+module_init(pwm_backlight_init);
+
+static void __exit pwm_backlight_exit(void)
+{
+ platform_driver_unregister(&pwm_backlight_driver);
+}
+module_exit(pwm_backlight_exit);
+
+MODULE_DESCRIPTION("PWM based Backlight Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/video/pxafb.c b/drivers/video/pxafb.c
index 3ee314b..3682bbd 100644
--- a/drivers/video/pxafb.c
+++ b/drivers/video/pxafb.c
@@ -1777,11 +1777,49 @@
return ret;
}
+static int __devexit pxafb_remove(struct platform_device *dev)
+{
+ struct pxafb_info *fbi = platform_get_drvdata(dev);
+ struct resource *r;
+ int irq;
+ struct fb_info *info;
+
+ if (!fbi)
+ return 0;
+
+ info = &fbi->fb;
+
+ unregister_framebuffer(info);
+
+ pxafb_disable_controller(fbi);
+
+ if (fbi->fb.cmap.len)
+ fb_dealloc_cmap(&fbi->fb.cmap);
+
+ irq = platform_get_irq(dev, 0);
+ free_irq(irq, fbi);
+
+ dma_free_writecombine(&dev->dev, fbi->map_size,
+ fbi->map_cpu, fbi->map_dma);
+
+ iounmap(fbi->mmio_base);
+
+ r = platform_get_resource(dev, IORESOURCE_MEM, 0);
+ release_mem_region(r->start, r->end - r->start + 1);
+
+ clk_put(fbi->clk);
+ kfree(fbi);
+
+ return 0;
+}
+
static struct platform_driver pxafb_driver = {
.probe = pxafb_probe,
+ .remove = pxafb_remove,
.suspend = pxafb_suspend,
.resume = pxafb_resume,
.driver = {
+ .owner = THIS_MODULE,
.name = "pxa2xx-fb",
},
};
@@ -1794,7 +1832,13 @@
return platform_driver_register(&pxafb_driver);
}
+static void __exit pxafb_exit(void)
+{
+ platform_driver_unregister(&pxafb_driver);
+}
+
module_init(pxafb_init);
+module_exit(pxafb_exit);
MODULE_DESCRIPTION("loadable framebuffer driver for PXA");
MODULE_LICENSE("GPL");
diff --git a/include/asm-arm/arch-pxa/pxa2xx-gpio.h b/include/asm-arm/arch-pxa/pxa2xx-gpio.h
index 763313c..a6e60f6 100644
--- a/include/asm-arm/arch-pxa/pxa2xx-gpio.h
+++ b/include/asm-arm/arch-pxa/pxa2xx-gpio.h
@@ -1,6 +1,8 @@
#ifndef __ASM_ARCH_PXA2XX_GPIO_H
#define __ASM_ARCH_PXA2XX_GPIO_H
+#warning Please use mfp-pxa2[57]x.h instead of pxa2xx-gpio.h
+
/* GPIO alternate function assignments */
#define GPIO1_RST 1 /* reset */
diff --git a/include/asm-arm/arch-pxa/zylonite.h b/include/asm-arm/arch-pxa/zylonite.h
index 4881b80..de577de 100644
--- a/include/asm-arm/arch-pxa/zylonite.h
+++ b/include/asm-arm/arch-pxa/zylonite.h
@@ -15,7 +15,6 @@
extern struct platform_mmc_slot zylonite_mmc_slot[];
-extern int gpio_backlight;
extern int gpio_eth_irq;
extern int wm9713_irq;
diff --git a/include/linux/pwm.h b/include/linux/pwm.h
new file mode 100644
index 0000000..3945f80
--- /dev/null
+++ b/include/linux/pwm.h
@@ -0,0 +1,31 @@
+#ifndef __LINUX_PWM_H
+#define __LINUX_PWM_H
+
+struct pwm_device;
+
+/*
+ * pwm_request - request a PWM device
+ */
+struct pwm_device *pwm_request(int pwm_id, const char *label);
+
+/*
+ * pwm_free - free a PWM device
+ */
+void pwm_free(struct pwm_device *pwm);
+
+/*
+ * pwm_config - change a PWM device configuration
+ */
+int pwm_config(struct pwm_device *pwm, int duty_ns, int period_ns);
+
+/*
+ * pwm_enable - start a PWM output toggling
+ */
+int pwm_enable(struct pwm_device *pwm);
+
+/*
+ * pwm_disable - stop a PWM output toggling
+ */
+void pwm_disable(struct pwm_device *pwm);
+
+#endif /* __ASM_ARCH_PWM_H */
diff --git a/include/linux/pwm_backlight.h b/include/linux/pwm_backlight.h
new file mode 100644
index 0000000..7a9754c
--- /dev/null
+++ b/include/linux/pwm_backlight.h
@@ -0,0 +1,17 @@
+/*
+ * Generic PWM backlight driver data - see drivers/video/backlight/pwm_bl.c
+ */
+#ifndef __LINUX_PWM_BACKLIGHT_H
+#define __LINUX_PWM_BACKLIGHT_H
+
+struct platform_pwm_backlight_data {
+ int pwm_id;
+ unsigned int max_brightness;
+ unsigned int dft_brightness;
+ unsigned int pwm_period_ns;
+ int (*init)(struct device *dev);
+ int (*notify)(int brightness);
+ void (*exit)(struct device *dev);
+};
+
+#endif
diff --git a/sound/soc/pxa/pxa2xx-i2s.c b/sound/soc/pxa/pxa2xx-i2s.c
index 4250710..e130346 100644
--- a/sound/soc/pxa/pxa2xx-i2s.c
+++ b/sound/soc/pxa/pxa2xx-i2s.c
@@ -18,6 +18,7 @@
#include <linux/module.h>
#include <linux/device.h>
#include <linux/delay.h>
+#include <linux/clk.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/initval.h>
@@ -40,6 +41,7 @@
u32 fmt;
};
static struct pxa_i2s_port pxa_i2s;
+static struct clk *clk_i2s;
static struct pxa2xx_pcm_dma_params pxa2xx_i2s_pcm_stereo_out = {
.name = "I2S PCM Stereo out",
@@ -82,6 +84,10 @@
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_cpu_dai *cpu_dai = rtd->dai->cpu_dai;
+ clk_i2s = clk_get(NULL, "I2SCLK");
+ if (IS_ERR(clk_i2s))
+ return PTR_ERR(clk_i2s);
+
if (!cpu_dai->active) {
SACR0 |= SACR0_RST;
SACR0 = 0;
@@ -149,7 +155,7 @@
pxa_gpio_mode(gpio_bus[pxa_i2s.master].tx);
pxa_gpio_mode(gpio_bus[pxa_i2s.master].frm);
pxa_gpio_mode(gpio_bus[pxa_i2s.master].clk);
- pxa_set_cken(CKEN_I2S, 1);
+ clk_enable(clk_i2s);
pxa_i2s_wait();
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
@@ -234,8 +240,10 @@
if (SACR1 & (SACR1_DREC | SACR1_DRPL)) {
SACR0 &= ~SACR0_ENB;
pxa_i2s_wait();
- pxa_set_cken(CKEN_I2S, 0);
+ clk_disable(clk_i2s);
}
+
+ clk_put(clk_i2s);
}
#ifdef CONFIG_PM