Hello,
On Wednesday, March 09, 2011 1:01 PM Kukjin Kim wrote:
> Tomasz Stanislawski wrote:
> >
> > Signed-off-by: Tomasz Stanislawski <t.stanislaws@xxxxxxxxxxx>
> > Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
> > ---
> > arch/arm/mach-s5pv310/clock.c | 6 +++
> > arch/arm/mach-s5pv310/include/mach/irqs.h | 4 ++
> > arch/arm/mach-s5pv310/include/mach/map.h | 1 +
> > arch/arm/plat-samsung/Kconfig | 5 ++
> > arch/arm/plat-samsung/Makefile | 1 +
> > arch/arm/plat-samsung/dev-i2c8.c | 68
> > +++++++++++++++++++++++++++++
> > arch/arm/plat-samsung/include/plat/devs.h | 1 +
> > arch/arm/plat-samsung/include/plat/iic.h | 1 +
> > 8 files changed, 87 insertions(+), 0 deletions(-)
> > create mode 100644 arch/arm/plat-samsung/dev-i2c8.c
> >
> > diff --git a/arch/arm/mach-s5pv310/clock.c b/arch/arm/mach-s5pv310/clock.c
> > index d28fa6f..465beb9 100644
> > --- a/arch/arm/mach-s5pv310/clock.c
> > +++ b/arch/arm/mach-s5pv310/clock.c
> > @@ -685,6 +685,12 @@ static struct clk init_clocks_off[] = {
> > .parent = &clk_aclk_100.clk,
> > .enable = s5pv310_clk_ip_peril_ctrl,
> > .ctrlbit = (1 << 13),
> > + }, {
> > + .name = "i2c",
> > + .id = 8,
> > + .parent = &clk_aclk_100.clk,
> > + .enable = s5pv310_clk_ip_peril_ctrl,
> > + .ctrlbit = (1 << 14),
> > },
> > };
> >
> > diff --git a/arch/arm/mach-s5pv310/include/mach/irqs.h b/arch/arm/mach-
> > s5pv310/include/mach/irqs.h
> > index f6b99c6..f7ddc98 100644
> > --- a/arch/arm/mach-s5pv310/include/mach/irqs.h
> > +++ b/arch/arm/mach-s5pv310/include/mach/irqs.h
> > @@ -77,6 +77,9 @@
> > #define IRQ_PDMA0 COMBINER_IRQ(21, 0)
> > #define IRQ_PDMA1 COMBINER_IRQ(21, 1)
> >
> > +#define IRQ_HDMI COMBINER_IRQ(16, 0)
> > +#define IRQ_HDMI_I2C COMBINER_IRQ(16, 1)
> > +
> > #define IRQ_TIMER0_VIC COMBINER_IRQ(22, 0)
> > #define IRQ_TIMER1_VIC COMBINER_IRQ(22, 1)
> > #define IRQ_TIMER2_VIC COMBINER_IRQ(22, 2)
> > @@ -100,6 +103,7 @@
> > #define IRQ_IIC5 COMBINER_IRQ(27, 5)
> > #define IRQ_IIC6 COMBINER_IRQ(27, 6)
> > #define IRQ_IIC7 COMBINER_IRQ(27, 7)
> > +#define IRQ_IIC8 IRQ_HDMI_I2C
> >
> > #define IRQ_HSMMC0 COMBINER_IRQ(29, 0)
> > #define IRQ_HSMMC1 COMBINER_IRQ(29, 1)
> > diff --git a/arch/arm/mach-s5pv310/include/mach/map.h b/arch/arm/mach-
> > s5pv310/include/mach/map.h
> > index 576ba55..0aa0171 100644
> > --- a/arch/arm/mach-s5pv310/include/mach/map.h
> > +++ b/arch/arm/mach-s5pv310/include/mach/map.h
> > @@ -120,6 +120,7 @@
> > #define S3C_PA_IIC5 S5PV310_PA_IIC(5)
> > #define S3C_PA_IIC6 S5PV310_PA_IIC(6)
> > #define S3C_PA_IIC7 S5PV310_PA_IIC(7)
> > +#define S3C_PA_IIC8 S5PV310_PA_IIC(8)
> > #define S3C_PA_RTC S5PV310_PA_RTC
> > #define S3C_PA_WDT S5PV310_PA_WATCHDOG
> >
> > diff --git a/arch/arm/plat-samsung/Kconfig b/arch/arm/plat-samsung/Kconfig
> > index 32be05c..dd1fd15 100644
> > --- a/arch/arm/plat-samsung/Kconfig
> > +++ b/arch/arm/plat-samsung/Kconfig
> > @@ -211,6 +211,11 @@ config S3C_DEV_I2C7
> > help
> > Compile in platform device definition for I2C controller 7
> >
> > +config S3C_DEV_I2C8
> > + bool
> > + help
> > + Compile in platform device definitions for I2C channel 8 (HDMIPHY)
> > +
> > config S3C_DEV_FB
> > bool
> > help
> > diff --git a/arch/arm/plat-samsung/Makefile
> b/arch/arm/plat-samsung/Makefile
> > index 7e92457..826ae4f 100644
> > --- a/arch/arm/plat-samsung/Makefile
> > +++ b/arch/arm/plat-samsung/Makefile
> > @@ -46,6 +46,7 @@ obj-$(CONFIG_S3C_DEV_I2C4) += dev-i2c4.o
> > obj-$(CONFIG_S3C_DEV_I2C5) += dev-i2c5.o
> > obj-$(CONFIG_S3C_DEV_I2C6) += dev-i2c6.o
> > obj-$(CONFIG_S3C_DEV_I2C7) += dev-i2c7.o
> > +obj-$(CONFIG_S3C_DEV_I2C8) += dev-i2c8.o
> > obj-$(CONFIG_S3C_DEV_FB) += dev-fb.o
> > obj-y += dev-uart.o
> > obj-$(CONFIG_S3C_DEV_USB_HOST) += dev-usb.o
> > diff --git a/arch/arm/plat-samsung/dev-i2c8.c b/arch/arm/plat-samsung/dev-
> > i2c8.c
> > new file mode 100644
> > index 0000000..8edba7f
> > --- /dev/null
> > +++ b/arch/arm/plat-samsung/dev-i2c8.c
> > @@ -0,0 +1,68 @@
> > +/* linux/arch/arm/plat-samsung/dev-i2c7.c
> > + *
> > + * Copyright (c) 2010 Samsung Electronics Co., Ltd.
> > + * http://www.samsung.com/
> > + *
> > + * S3C series device definition for i2c device 8
> > + *
> > + * Based on plat-samsung/dev-i2c8.c
> > + *
> > + * 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/gfp.h>
> > +#include <linux/kernel.h>
> > +#include <linux/string.h>
> > +#include <linux/platform_device.h>
> > +
> > +#include <mach/irqs.h>
> > +#include <mach/map.h>
> > +
> > +#include <plat/regs-iic.h>
> > +#include <plat/iic.h>
> > +#include <plat/devs.h>
> > +#include <plat/cpu.h>
> > +
> > +static struct resource s3c_i2c_resource[] = {
> > + [0] = {
> > + .start = S3C_PA_IIC8,
> > + .end = S3C_PA_IIC8 + SZ_4K - 1,
> > + .flags = IORESOURCE_MEM,
> > + },
> > + [1] = {
> > + .start = IRQ_IIC8,
> > + .end = IRQ_IIC8,
> > + .flags = IORESOURCE_IRQ,
> > + },
> > +};
> > +
> > +struct platform_device s3c_device_i2c8 = {
> > + .name = "s3c2440-hdmiphy-i2c",
> > + .id = 8,
> > + .num_resources = ARRAY_SIZE(s3c_i2c_resource),
> > + .resource = s3c_i2c_resource,
> > +};
> > +
> > +static struct s3c2410_platform_i2c default_i2c_data8 __initdata = {
> > + .flags = 0,
> > + .bus_num = 8,
> > + .slave_addr = 0x10,
> > + .frequency = 400*1000,
> > + .sda_delay = 100,
> > +};
> > +
> > +void __init s3c_i2c8_set_platdata(struct s3c2410_platform_i2c *pd)
> > +{
> > + struct s3c2410_platform_i2c *npd;
> > +
> > + if (!pd)
> > + pd = &default_i2c_data8;
> > +
> > + npd = kmemdup(pd, sizeof(struct s3c2410_platform_i2c), GFP_KERNEL);
> > + if (!npd)
> > + printk(KERN_ERR "%s: no memory for platform data\n",
> __func__);
> > +
> > + s3c_device_i2c8.dev.platform_data = npd;
> > +}
> > diff --git a/arch/arm/plat-samsung/include/plat/devs.h b/arch/arm/plat-
> > samsung/include/plat/devs.h
> > index 6a869b8..f14709c 100644
> > --- a/arch/arm/plat-samsung/include/plat/devs.h
> > +++ b/arch/arm/plat-samsung/include/plat/devs.h
> > @@ -53,6 +53,7 @@ extern struct platform_device s3c_device_i2c4;
> > extern struct platform_device s3c_device_i2c5;
> > extern struct platform_device s3c_device_i2c6;
> > extern struct platform_device s3c_device_i2c7;
> > +extern struct platform_device s3c_device_i2c8;
> > extern struct platform_device s3c_device_rtc;
> > extern struct platform_device s3c_device_adc;
> > extern struct platform_device s3c_device_sdi;
> > diff --git a/arch/arm/plat-samsung/include/plat/iic.h b/arch/arm/plat-
> > samsung/include/plat/iic.h
> > index 1543da8..dd0d728 100644
> > --- a/arch/arm/plat-samsung/include/plat/iic.h
> > +++ b/arch/arm/plat-samsung/include/plat/iic.h
> > @@ -60,6 +60,7 @@ extern void s3c_i2c4_set_platdata(struct
> > s3c2410_platform_i2c *i2c);
> > extern void s3c_i2c5_set_platdata(struct s3c2410_platform_i2c *i2c);
> > extern void s3c_i2c6_set_platdata(struct s3c2410_platform_i2c *i2c);
> > extern void s3c_i2c7_set_platdata(struct s3c2410_platform_i2c *i2c);
> > +extern void s3c_i2c8_set_platdata(struct s3c2410_platform_i2c *i2c);
> >
> > /* defined by architecture to configure gpio */
> > extern void s3c_i2c0_cfg_gpio(struct platform_device *dev);
> > --
> > 1.7.1.569.g6f426
>
> Basically, EXYNOS4 can't support I2C channel 8 for general purpose.
> Yeah, it is dedicated to HDMI..it means we can't use i2c8 stuff...
> (As a note, I2C interface for HDMI PHY is internally connected.)
This i2c8 interface is in fact specialized for hdmi-phy only, but it can
perfectly use s3c-2410 i2c host bus driver. I definitely see no reason
to reimplement i2c bus logic in the hdmi/tv driver just because it is a 'part
of hdmi/tv driver'. The generic s3c2410-i2c driver should be used instead.
If you don't like above proposal, maybe the i2c8-dev.c should register itself
as a generic "s3c2440-i2c" platform device data and exynos4 cpu startup code
will rename it to "s3c2440-hdmi-phy-i2c" (the hdmiphy specialized version).
Note that a lot of drivers for advanced pci video capture cards use standard
i2c bus drivers for controlling card-internal modules. If the other driver
can be reused with a very little effort, why hesitate to use it?
Best regards
--
Marek Szyprowski
Samsung Poland R&D Center
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