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authorMike Rapoport <mike@compulab.co.il>2008-08-17 06:23:05 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2008-09-09 16:32:51 +0100
commit9ba63c4fa10cf446eff06a3200822d22b0c31c31 (patch)
treebc67d381e703aa150799f07ef85a7d7369376b72
parent57a7a62eb65b35f51814382b0841ff99be242880 (diff)
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[ARM] 5201/1: PXA3xx: Add support for power i2c bus
Add power I2C support for PXA3xx processors Signed-off-by: Mike Rapoport <mike@compulab.co.il> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
-rw-r--r--arch/arm/mach-pxa/devices.h1
-rw-r--r--arch/arm/mach-pxa/include/mach/i2c.h6
-rw-r--r--arch/arm/mach-pxa/pxa27x.c2
-rw-r--r--arch/arm/mach-pxa/pxa3xx.c45
-rw-r--r--drivers/i2c/busses/i2c-pxa.c12
5 files changed, 59 insertions, 7 deletions
diff --git a/arch/arm/mach-pxa/devices.h b/arch/arm/mach-pxa/devices.h
index 887c738f5911..bb04af4b0aa3 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 80596b013443..897e71752177 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 f9f6a9c31f4b..c33cf6ac8c81 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 03cbc38103ed..b3cd5d0b0f35 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 44d838410f15..5d5fbc518b7b 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);