From 9ba63c4fa10cf446eff06a3200822d22b0c31c31 Mon Sep 17 00:00:00 2001 From: Mike Rapoport Date: Sun, 17 Aug 2008 06:23:05 +0100 Subject: [PATCH] [ARM] 5201/1: PXA3xx: Add support for power i2c bus Add power I2C support for PXA3xx processors Signed-off-by: Mike Rapoport Signed-off-by: Russell King --- arch/arm/mach-pxa/devices.h | 1 + arch/arm/mach-pxa/include/mach/i2c.h | 6 +++- arch/arm/mach-pxa/pxa27x.c | 2 +- arch/arm/mach-pxa/pxa3xx.c | 45 ++++++++++++++++++++++++++++ drivers/i2c/busses/i2c-pxa.c | 12 ++++---- 5 files changed, 59 insertions(+), 7 deletions(-) diff --git a/arch/arm/mach-pxa/devices.h b/arch/arm/mach-pxa/devices.h index 887c738f591..bb04af4b0aa 100644 --- a/arch/arm/mach-pxa/devices.h +++ b/arch/arm/mach-pxa/devices.h @@ -32,5 +32,6 @@ extern struct platform_device pxa27x_device_pwm0; extern struct platform_device pxa27x_device_pwm1; extern struct platform_device pxa3xx_device_nand; +extern struct platform_device pxa3xx_device_i2c_power; void __init pxa_register_device(struct platform_device *dev, void *data); diff --git a/arch/arm/mach-pxa/include/mach/i2c.h b/arch/arm/mach-pxa/include/mach/i2c.h index 80596b01344..897e7175217 100644 --- a/arch/arm/mach-pxa/include/mach/i2c.h +++ b/arch/arm/mach-pxa/include/mach/i2c.h @@ -71,7 +71,11 @@ struct i2c_pxa_platform_data { extern void pxa_set_i2c_info(struct i2c_pxa_platform_data *info); #ifdef CONFIG_PXA27x -extern void pxa_set_i2c_power_info(struct i2c_pxa_platform_data *info); +extern void pxa27x_set_i2c_power_info(struct i2c_pxa_platform_data *info); +#endif + +#ifdef CONFIG_PXA3xx +extern void pxa3xx_set_i2c_power_info(struct i2c_pxa_platform_data *info); #endif #endif diff --git a/arch/arm/mach-pxa/pxa27x.c b/arch/arm/mach-pxa/pxa27x.c index f9f6a9c31f4..c33cf6ac8c8 100644 --- a/arch/arm/mach-pxa/pxa27x.c +++ b/arch/arm/mach-pxa/pxa27x.c @@ -349,7 +349,7 @@ struct platform_device pxa27x_device_i2c_power = { .num_resources = ARRAY_SIZE(i2c_power_resources), }; -void __init pxa_set_i2c_power_info(struct i2c_pxa_platform_data *info) +void __init pxa27x_set_i2c_power_info(struct i2c_pxa_platform_data *info) { local_irq_disable(); PCFR |= PCFR_PI2CEN; diff --git a/arch/arm/mach-pxa/pxa3xx.c b/arch/arm/mach-pxa/pxa3xx.c index 03cbc38103e..b3cd5d0b0f3 100644 --- a/arch/arm/mach-pxa/pxa3xx.c +++ b/arch/arm/mach-pxa/pxa3xx.c @@ -203,6 +203,19 @@ static const struct clkops clk_pout_ops = { .disable = clk_pout_disable, }; +static void clk_dummy_enable(struct clk *clk) +{ +} + +static void clk_dummy_disable(struct clk *clk) +{ +} + +static const struct clkops clk_dummy_ops = { + .enable = clk_dummy_enable, + .disable = clk_dummy_disable, +}; + static struct clk pxa3xx_clks[] = { { .name = "CLK_POUT", @@ -211,6 +224,13 @@ static struct clk pxa3xx_clks[] = { .delay = 70, }, + /* Power I2C clock is always on */ + { + .name = "I2CCLK", + .ops = &clk_dummy_ops, + .dev = &pxa3xx_device_i2c_power.dev, + }, + PXA3xx_CK("LCDCLK", LCD, &clk_pxa3xx_hsio_ops, &pxa_device_fb.dev), PXA3xx_CK("CAMCLK", CAMERA, &clk_pxa3xx_hsio_ops, NULL), PXA3xx_CK("AC97CLK", AC97, &clk_pxa3xx_ac97_ops, NULL), @@ -509,6 +529,30 @@ void __init pxa3xx_init_irq(void) * device registration specific to PXA3xx. */ +static struct resource i2c_power_resources[] = { + { + .start = 0x40f500c0, + .end = 0x40f500d3, + .flags = IORESOURCE_MEM, + }, { + .start = IRQ_PWRI2C, + .end = IRQ_PWRI2C, + .flags = IORESOURCE_IRQ, + }, +}; + +struct platform_device pxa3xx_device_i2c_power = { + .name = "pxa2xx-i2c", + .id = 1, + .resource = i2c_power_resources, + .num_resources = ARRAY_SIZE(i2c_power_resources), +}; + +void __init pxa3xx_set_i2c_power_info(struct i2c_pxa_platform_data *info) +{ + pxa3xx_device_i2c_power.dev.platform_data = info; +} + static struct platform_device *devices[] __initdata = { /* &pxa_device_udc, The UDC driver is PXA25x only */ &pxa_device_ffuart, @@ -522,6 +566,7 @@ static struct platform_device *devices[] __initdata = { &pxa3xx_device_ssp4, &pxa27x_device_pwm0, &pxa27x_device_pwm1, + &pxa3xx_device_i2c_power, }; static struct sys_device pxa3xx_sysdev[] = { diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c index 44d838410f1..5d5fbc518b7 100644 --- a/drivers/i2c/busses/i2c-pxa.c +++ b/drivers/i2c/busses/i2c-pxa.c @@ -60,6 +60,7 @@ struct pxa_i2c { u32 icrlog[32]; void __iomem *reg_base; + unsigned int reg_shift; unsigned long iobase; unsigned long iosize; @@ -68,11 +69,11 @@ struct pxa_i2c { int use_pio; }; -#define _IBMR(i2c) ((i2c)->reg_base + 0) -#define _IDBR(i2c) ((i2c)->reg_base + 8) -#define _ICR(i2c) ((i2c)->reg_base + 0x10) -#define _ISR(i2c) ((i2c)->reg_base + 0x18) -#define _ISAR(i2c) ((i2c)->reg_base + 0x20) +#define _IBMR(i2c) ((i2c)->reg_base + (0x0 << (i2c)->reg_shift)) +#define _IDBR(i2c) ((i2c)->reg_base + (0x4 << (i2c)->reg_shift)) +#define _ICR(i2c) ((i2c)->reg_base + (0x8 << (i2c)->reg_shift)) +#define _ISR(i2c) ((i2c)->reg_base + (0xc << (i2c)->reg_shift)) +#define _ISAR(i2c) ((i2c)->reg_base + (0x10 << (i2c)->reg_shift)) /* * I2C Slave mode address @@ -993,6 +994,7 @@ static int i2c_pxa_probe(struct platform_device *dev) ret = -EIO; goto eremap; } + i2c->reg_shift = (cpu_is_pxa3xx() && (dev->id == 1)) ? 0 : 1; i2c->iobase = res->start; i2c->iosize = res_len(res); -- 2.41.0