projects/linux·commit b4beb4bf

Merge branch 'for-linus/i2c-3.2' of git://git.fluff.org/bjdooks/linux

b4beb4bf · Linus Torvalds <[email protected]> · 2011-11-01 15:07:19 -07:00

* 'for-linus/i2c-3.2' of git://git.fluff.org/bjdooks/linux: (47 commits)
  i2c-s3c2410: Add device tree support
  i2c-s3c2410: Keep a copy of platform data and use it
  i2c-nomadik: cosmetic coding style corrections
  i2c-au1550: dev_pm_ops conversion
  i2c-au1550: increase timeout waiting for master done
  i2c-au1550: remove unused ack_timeout
  i2c-au1550: remove usage of volatile keyword
  i2c-tegra: __iomem annotation fix
  i2c-eg20t: Add initialize processing in case i2c-error occurs
  i2c-eg20t: Fix flag setting issue
  i2c-eg20t: add stop sequence in case wait-event timeout occurs
  i2c-eg20t: Separate error processing
  i2c-eg20t: Fix 10bit access issue
  i2c-eg20t: Modify returned value s32 to long
  i2c-eg20t: Fix bus-idle waiting issue
  i2c-designware: Fix PCI core warning on suspend/resume
  i2c-designware: Add runtime power management support
  i2c-designware: Add support for Designware core behind PCI devices.
  i2c-designware: Push all register reads/writes into the core code.
  i2c-designware: Support multiple cores using same ISR
  ...
Commit
b4beb4bf9934d151bf4581a54ae028927374cb2a
Parents
f3c3f067 · 3945fe93

Merge commit. Changes below are compared with the first parent: f3c3f067.

Changes

26 files changed · +1543 −684

FileStatusAddDelContent
Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txtadded+25−0View file
Documentation/devicetree/bindings/i2c/samsung-i2c.txtadded+39−0View file
arch/arm/plat-mxc/include/mach/i2c.hmodified+0−4View file
arch/arm/plat-omap/i2c.cmodified+27−0View file
arch/mips/include/asm/mach-au1x00/au1xxx_psc.hmodified+0−13View file
drivers/i2c/busses/Kconfigmodified+13−3View file
drivers/i2c/busses/Makefilemodified+4−1View file
drivers/i2c/busses/i2c-au1550.cmodified+114−166View file
drivers/i2c/busses/i2c-bfin-twi.cmodified+2−2View file
drivers/i2c/busses/i2c-designware.c → drivers/i2c/busses/i2c-designware-core.crenamed+120−262View file
drivers/i2c/busses/i2c-designware-core.hadded+105−0View file
drivers/i2c/busses/i2c-designware-pcidrv.cadded+392−0View file
drivers/i2c/busses/i2c-designware-platdrv.cadded+215−0View file
drivers/i2c/busses/i2c-eg20t.cmodified+196−74View file
drivers/i2c/busses/i2c-highlander.cmodified+1−1View file
drivers/i2c/busses/i2c-imx.cmodified+22−24View file
drivers/i2c/busses/i2c-nomadik.cmodified+47−44View file
drivers/i2c/busses/i2c-nuc900.cmodified+1−1View file
drivers/i2c/busses/i2c-omap.cmodified+92−72View file
drivers/i2c/busses/i2c-pmcmsp.cmodified+1−1View file
drivers/i2c/busses/i2c-s3c2410.cmodified+121−9View file
drivers/i2c/busses/i2c-sh7760.cmodified+1−1View file
drivers/i2c/busses/i2c-sh_mobile.cmodified+1−1View file
drivers/i2c/busses/i2c-stu300.cmodified+1−1View file
drivers/i2c/busses/i2c-tegra.cmodified+1−1View file
include/linux/i2c-omap.hmodified+2−3View file

Only the first 600 diff lines are shown. Download the complete patch.

Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txt

View file
diff --git a/Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txt b/Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txt
new file mode 100644
index 0000000..f3cf43b
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txt
@@ -0,0 +1,25 @@
+* Freescale Inter IC (I2C) and High Speed Inter IC (HS-I2C) for i.MX
+
+Required properties:
+- compatible : Should be "fsl,<chip>-i2c"
+- reg : Should contain I2C/HS-I2C registers location and length
+- interrupts : Should contain I2C/HS-I2C interrupt
+
+Optional properties:
+- clock-frequency : Constains desired I2C/HS-I2C bus clock frequency in Hz.
+ The absence of the propoerty indicates the default frequency 100 kHz.
+
+Examples:
+
+i2c@83fc4000 { /* I2C2 on i.MX51 */
+ compatible = "fsl,imx51-i2c", "fsl,imx1-i2c";
+ reg = <0x83fc4000 0x4000>;
+ interrupts = <63>;
+};
+
+i2c@70038000 { /* HS-I2C on i.MX51 */
+ compatible = "fsl,imx51-i2c", "fsl,imx1-i2c";
+ reg = <0x70038000 0x4000>;
+ interrupts = <64>;
+ clock-frequency = <400000>;
+};

Documentation/devicetree/bindings/i2c/samsung-i2c.txt

View file
diff --git a/Documentation/devicetree/bindings/i2c/samsung-i2c.txt b/Documentation/devicetree/bindings/i2c/samsung-i2c.txt
new file mode 100644
index 0000000..38832c7
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/samsung-i2c.txt
@@ -0,0 +1,39 @@
+* Samsung's I2C controller
+
+The Samsung's I2C controller is used to interface with I2C devices.
+
+Required properties:
+ - compatible: value should be either of the following.
+ (a) "samsung, s3c2410-i2c", for i2c compatible with s3c2410 i2c.
+ (b) "samsung, s3c2440-i2c", for i2c compatible with s3c2440 i2c.
+ - reg: physical base address of the controller and length of memory mapped
+ region.
+ - interrupts: interrupt number to the cpu.
+ - samsung,i2c-sda-delay: Delay (in ns) applied to data line (SDA) edges.
+ - gpios: The order of the gpios should be the following: <SDA, SCL>.
+ The gpio specifier depends on the gpio controller.
+
+Optional properties:
+ - samsung,i2c-slave-addr: Slave address in multi-master enviroment. If not
+ specified, default value is 0.
+ - samsung,i2c-max-bus-freq: Desired frequency in Hz of the bus. If not
+ specified, the default value in Hz is 100000.
+
+Example:
+
+ i2c@13870000 {
+ compatible = "samsung,s3c2440-i2c";
+ reg = <0x13870000 0x100>;
+ interrupts = <345>;
+ samsung,i2c-sda-delay = <100>;
+ samsung,i2c-max-bus-freq = <100000>;
+ gpios = <&gpd1 2 0 /* SDA */
+ &gpd1 3 0 /* SCL */>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ wm8994@1a {
+ compatible = "wlf,wm8994";
+ reg = <0x1a>;
+ };
+ };

arch/arm/plat-mxc/include/mach/i2c.h

View file
diff --git a/arch/arm/plat-mxc/include/mach/i2c.h b/arch/arm/plat-mxc/include/mach/i2c.h
index 4a5dc5c..375cdd0 100644
--- a/arch/arm/plat-mxc/include/mach/i2c.h
+++ b/arch/arm/plat-mxc/include/mach/i2c.h
@@ -11,14 +11,10 @@
/**
* struct imxi2c_platform_data - structure of platform data for MXC I2C driver
- * @init: Initialise gpio's and other board specific things
- * @exit: Free everything initialised by @init
* @bitrate: Bus speed measured in Hz
*
**/
struct imxi2c_platform_data {
- int (*init)(struct device *dev);
- void (*exit)(struct device *dev);
int bitrate;
};

arch/arm/plat-omap/i2c.c

View file
diff --git a/arch/arm/plat-omap/i2c.c b/arch/arm/plat-omap/i2c.c
index 3341ca4..2388b8e 100644
--- a/arch/arm/plat-omap/i2c.c
+++ b/arch/arm/plat-omap/i2c.c
@@ -108,6 +108,22 @@ static inline int omap1_i2c_add_bus(int bus_id)
res[1].start = INT_I2C;
pdata = &i2c_pdata[bus_id - 1];
+ /* all OMAP1 have IP version 1 register set */
+ pdata->rev = OMAP_I2C_IP_VERSION_1;
+
+ /* all OMAP1 I2C are implemented like this */
+ pdata->flags = OMAP_I2C_FLAG_NO_FIFO |
+ OMAP_I2C_FLAG_SIMPLE_CLOCK |
+ OMAP_I2C_FLAG_16BIT_DATA_REG |
+ OMAP_I2C_FLAG_ALWAYS_ARMXOR_CLK;
+
+ /* how the cpu bus is wired up differs for 7xx only */
+
+ if (cpu_is_omap7xx())
+ pdata->flags |= OMAP_I2C_FLAG_BUS_SHIFT_1;
+ else
+ pdata->flags |= OMAP_I2C_FLAG_BUS_SHIFT_2;
+
return platform_device_register(pdev);
}
@@ -138,6 +154,7 @@ static inline int omap2_i2c_add_bus(int bus_id)
struct omap_device *od;
char oh_name[MAX_OMAP_I2C_HWMOD_NAME_LEN];
struct omap_i2c_bus_platform_data *pdata;
+ struct omap_i2c_dev_attr *dev_attr;
omap2_i2c_mux_pins(bus_id);
@@ -152,6 +169,16 @@ static inline int omap2_i2c_add_bus(int bus_id)
pdata = &i2c_pdata[bus_id - 1];
/*
+ * pass the hwmod class's CPU-specific knowledge of I2C IP revision in
+ * use, and functionality implementation flags, up to the OMAP I2C
+ * driver via platform data
+ */
+ pdata->rev = oh->class->rev;
+
+ dev_attr = (struct omap_i2c_dev_attr *)oh->dev_attr;
+ pdata->flags = dev_attr->flags;
+
+ /*
* When waiting for completion of a i2c transfer, we need to
* set a wake up latency constraint for the MPU. This is to
* ensure quick enough wakeup from idle, when transfer

arch/mips/include/asm/mach-au1x00/au1xxx_psc.h

View file
diff --git a/arch/mips/include/asm/mach-au1x00/au1xxx_psc.h b/arch/mips/include/asm/mach-au1x00/au1xxx_psc.h
index 892b7f1..5a5cb73 100644
--- a/arch/mips/include/asm/mach-au1x00/au1xxx_psc.h
+++ b/arch/mips/include/asm/mach-au1x00/au1xxx_psc.h
@@ -394,19 +394,6 @@ typedef struct psc_spi {
#define PSC_SPITXRX_LC (1 << 29)
#define PSC_SPITXRX_SR (1 << 28)
-/* PSC in SMBus (I2C) Mode. */
-typedef struct psc_smb {
- u32 psc_sel;
- u32 psc_ctrl;
- u32 psc_smbcfg;
- u32 psc_smbmsk;
- u32 psc_smbpcr;
- u32 psc_smbstat;
- u32 psc_smbevnt;
- u32 psc_smbtxrx;
- u32 psc_smbtmr;
-} psc_smb_t;
-
/* SMBus Config Register. */
#define PSC_SMBCFG_RT_MASK (3 << 30)
#define PSC_SMBCFG_RT_FIFO1 (0 << 30)

drivers/i2c/busses/Kconfig

View file
diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
index d1fc5cf..b2b8562 100644
--- a/drivers/i2c/busses/Kconfig
+++ b/drivers/i2c/busses/Kconfig
@@ -350,15 +350,25 @@ config I2C_DAVINCI
devices such as DaVinci NIC.
For details please see http://www.ti.com/davinci
-config I2C_DESIGNWARE
- tristate "Synopsys DesignWare"
+config I2C_DESIGNWARE_PLATFORM
+ tristate "Synopsys DesignWare Platfrom"
depends on HAVE_CLK
help
If you say yes to this option, support will be included for the
Synopsys DesignWare I2C adapter. Only master mode is supported.
This driver can also be built as a module. If so, the module
- will be called i2c-designware.
+ will be called i2c-designware-platform.
+
+config I2C_DESIGNWARE_PCI
+ tristate "Synopsys DesignWare PCI"
+ depends on PCI
+ help
+ If you say yes to this option, support will be included for the
+ Synopsys DesignWare I2C adapter. Only master mode is supported.
+
+ This driver can also be built as a module. If so, the module
+ will be called i2c-designware-pci.
config I2C_GPIO
tristate "GPIO-based bitbanging I2C"

drivers/i2c/busses/Makefile

View file
diff --git a/drivers/i2c/busses/Makefile b/drivers/i2c/busses/Makefile
index e6cf294..fba6da6 100644
--- a/drivers/i2c/busses/Makefile
+++ b/drivers/i2c/busses/Makefile
@@ -33,7 +33,10 @@ obj-$(CONFIG_I2C_AU1550) += i2c-au1550.o
obj-$(CONFIG_I2C_BLACKFIN_TWI) += i2c-bfin-twi.o
obj-$(CONFIG_I2C_CPM) += i2c-cpm.o
obj-$(CONFIG_I2C_DAVINCI) += i2c-davinci.o
-obj-$(CONFIG_I2C_DESIGNWARE) += i2c-designware.o
+obj-$(CONFIG_I2C_DESIGNWARE_PLATFORM) += i2c-designware-platform.o
+i2c-designware-platform-objs := i2c-designware-platdrv.o i2c-designware-core.o
+obj-$(CONFIG_I2C_DESIGNWARE_PCI) += i2c-designware-pci.o
+i2c-designware-pci-objs := i2c-designware-pcidrv.o i2c-designware-core.o
obj-$(CONFIG_I2C_GPIO) += i2c-gpio.o
obj-$(CONFIG_I2C_HIGHLANDER) += i2c-highlander.o
obj-$(CONFIG_I2C_IBM_IIC) += i2c-ibm_iic.o

drivers/i2c/busses/i2c-au1550.c

View file
diff --git a/drivers/i2c/busses/i2c-au1550.c b/drivers/i2c/busses/i2c-au1550.c
index 532828b..4f757a2 100644
--- a/drivers/i2c/busses/i2c-au1550.c
+++ b/drivers/i2c/busses/i2c-au1550.c
@@ -39,29 +39,41 @@
#include <asm/mach-au1x00/au1xxx.h>
#include <asm/mach-au1x00/au1xxx_psc.h>
+#define PSC_SEL 0x00
+#define PSC_CTRL 0x04
+#define PSC_SMBCFG 0x08
+#define PSC_SMBMSK 0x0C
+#define PSC_SMBPCR 0x10
+#define PSC_SMBSTAT 0x14
+#define PSC_SMBEVNT 0x18
+#define PSC_SMBTXRX 0x1C
+#define PSC_SMBTMR 0x20
+
struct i2c_au1550_data {
- u32 psc_base;
+ void __iomem *psc_base;
int xfer_timeout;
- int ack_timeout;
struct i2c_adapter adap;
struct resource *ioarea;
};
-static int
-wait_xfer_done(struct i2c_au1550_data *adap)
+static inline void WR(struct i2c_au1550_data *a, int r, unsigned long v)
{
- u32 stat;
- int i;
- volatile psc_smb_t *sp;
+ __raw_writel(v, a->psc_base + r);
+ wmb();
+}
- sp = (volatile psc_smb_t *)(adap->psc_base);
+static inline unsigned long RD(struct i2c_au1550_data *a, int r)
+{
+ return __raw_readl(a->psc_base + r);
+}
- /* Wait for Tx Buffer Empty
- */
+static int wait_xfer_done(struct i2c_au1550_data *adap)
+{
+ int i;
+
+ /* Wait for Tx Buffer Empty */
for (i = 0; i < adap->xfer_timeout; i++) {
- stat = sp->psc_smbstat;
- au_sync();
- if ((stat & PSC_SMBSTAT_TE) != 0)
+ if (RD(adap, PSC_SMBSTAT) & PSC_SMBSTAT_TE)
return 0;
udelay(1);
@@ -70,41 +82,27 @@ wait_xfer_done(struct i2c_au1550_data *adap)
return -ETIMEDOUT;
}
-static int
-wait_ack(struct i2c_au1550_data *adap)
+static int wait_ack(struct i2c_au1550_data *adap)
{
- u32 stat;
- volatile psc_smb_t *sp;
+ unsigned long stat;
if (wait_xfer_done(adap))
return -ETIMEDOUT;
- sp = (volatile psc_smb_t *)(adap->psc_base);
-
- stat = sp->psc_smbevnt;
- au_sync();
-
+ stat = RD(adap, PSC_SMBEVNT);
if ((stat & (PSC_SMBEVNT_DN | PSC_SMBEVNT_AN | PSC_SMBEVNT_AL)) != 0)
return -ETIMEDOUT;
return 0;
}
-static int
-wait_master_done(struct i2c_au1550_data *adap)
+static int wait_master_done(struct i2c_au1550_data *adap)
{
- u32 stat;
- int i;
- volatile psc_smb_t *sp;
+ int i;
- sp = (volatile psc_smb_t *)(adap->psc_base);
-
- /* Wait for Master Done.
- */
- for (i = 0; i < adap->xfer_timeout; i++) {
- stat = sp->psc_smbevnt;
- au_sync();
- if ((stat & PSC_SMBEVNT_MD) != 0)
+ /* Wait for Master Done. */
+ for (i = 0; i < 2 * adap->xfer_timeout; i++) {
+ if ((RD(adap, PSC_SMBEVNT) & PSC_SMBEVNT_MD) != 0)
return 0;
udelay(1);
}
@@ -115,29 +113,20 @@ wait_master_done(struct i2c_au1550_data *adap)
static int
do_address(struct i2c_au1550_data *adap, unsigned int addr, int rd, int q)
{
- volatile psc_smb_t *sp;
- u32 stat;
+ unsigned long stat;
- sp = (volatile psc_smb_t *)(adap->psc_base);
-
- /* Reset the FIFOs, clear events.
- */
- stat = sp->psc_smbstat;
- sp->psc_smbevnt = PSC_SMBEVNT_ALLCLR;
- au_sync();
+ /* Reset the FIFOs, clear events. */
+ stat = RD(adap, PSC_SMBSTAT);
+ WR(adap, PSC_SMBEVNT, PSC_SMBEVNT_ALLCLR);
if (!(stat & PSC_SMBSTAT_TE) || !(stat & PSC_SMBSTAT_RE)) {
- sp->psc_smbpcr = PSC_SMBPCR_DC;
- au_sync();
- do {
- stat = sp->psc_smbpcr;
- au_sync();
- } while ((stat & PSC_SMBPCR_DC) != 0);
+ WR(adap, PSC_SMBPCR, PSC_SMBPCR_DC);
+ while ((RD(adap, PSC_SMBPCR) & PSC_SMBPCR_DC) != 0)
+ cpu_relax();
udelay(50);
}
- /* Write out the i2c chip address and specify operation
- */
+ /* Write out the i2c chip address and specify operation */
addr <<= 1;
if (rd)
addr |= 1;
@@ -146,56 +135,42 @@ do_address(struct i2c_au1550_data *adap, unsigned int addr, int rd, int q)
if (q)
addr |= PSC_SMBTXRX_STP;
- /* Put byte into fifo, start up master.
- */
- sp->psc_smbtxrx = addr;
- au_sync();
- sp->psc_smbpcr = PSC_SMBPCR_MS;
- au_sync();
+ /* Put byte into fifo, start up master. */
+ WR(adap, PSC_SMBTXRX, addr);
+ WR(adap, PSC_SMBPCR, PSC_SMBPCR_MS);
if (wait_ack(adap))
return -EIO;
return (q) ? wait_master_done(adap) : 0;
}
-static u32
-wait_for_rx_byte(struct i2c_au1550_data *adap, u32 *ret_data)
+static int wait_for_rx_byte(struct i2c_au1550_data *adap, unsigned char *out)
{
- int j;
- u32 data, stat;
- volatile psc_smb_t *sp;
+ int j;
if (wait_xfer_done(adap))
return -EIO;
- sp = (volatile psc_smb_t *)(adap->psc_base);
-
j = adap->xfer_timeout * 100;
do {
j--;
if (j <= 0)
return -EIO;
- stat = sp->psc_smbstat;
- au_sync();
- if ((stat & PSC_SMBSTAT_RE) == 0)
+ if ((RD(adap, PSC_SMBSTAT) & PSC_SMBSTAT_RE) == 0)
j = 0;
else
udelay(1);
} while (j > 0);
- data = sp->psc_smbtxrx;
- au_sync();
- *ret_data = data;
+
+ *out = RD(adap, PSC_SMBTXRX);
return 0;
}
-static int
-i2c_read(struct i2c_au1550_data *adap, unsigned char *buf,
+static int i2c_read(struct i2c_au1550_data *adap, unsigned char *buf,
unsigned int len)
{
- int i;
- u32 data;
- volatile psc_smb_t *sp;
+ int i;
if (len == 0)
return 0;
@@ -204,62 +179,46 @@ i2c_read(struct i2c_au1550_data *adap, unsigned char *buf,
* zero bytes for timing, waiting for bytes to appear in the
* receive fifo, then reading the bytes.
*/
-
- sp = (volatile psc_smb_t *)(adap->psc_base);
-
i = 0;
- while (i < (len-1)) {
- sp->psc_smbtxrx = 0;
- au_sync();
- if (wait_for_rx_byte(adap, &data))
+ while (i < (len - 1)) {
+ WR(adap, PSC_SMBTXRX, 0);
+ if (wait_for_rx_byte(adap, &buf[i]))
return -EIO;
- buf[i] = data;
i++;
}
- /* The last byte has to indicate transfer done.
- */
- sp->psc_smbtxrx = PSC_SMBTXRX_STP;
- au_sync();
+ /* The last byte has to indicate transfer done. */
+ WR(adap, PSC_SMBTXRX, PSC_SMBTXRX_STP);
if (wait_master_done(adap))
return -EIO;
- data = sp->psc_smbtxrx;
- au_sync();
- buf[i] = data;
+ buf[i] = (unsigned char)(RD(adap, PSC_SMBTXRX) & 0xff);
return 0;
}
-static int
-i2c_write(struct i2c_au1550_data *adap, unsigned char *buf,
+static int i2c_write(struct i2c_au1550_data *adap, unsigned char *buf,
unsigned int len)
{
- int i;
- u32 data;
- volatile psc_smb_t *sp;
+ int i;
+ unsigned long data;
if (len == 0)
return 0;
- sp = (volatile psc_smb_t *)(adap->psc_base);
-
i = 0;
while (i < (len-1)) {
data = buf[i];
- sp->psc_smbtxrx = data;
- au_sync();
+ WR(adap, PSC_SMBTXRX, data);
if (wait_ack(adap))
return -EIO;
i++;
}
- /* The last byte has to indicate transfer done.
- */
+ /* The last byte has to indicate transfer done. */
data = buf[i];
data |= PSC_SMBTXRX_STP;
- sp->psc_smbtxrx = data;
- au_sync();
+ WR(adap, PSC_SMBTXRX, data);
if (wait_master_done(adap))
return -EIO;
return 0;
@@ -269,12 +228,10 @@ static int
au1550_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg *msgs, int num)
{
struct i2c_au1550_data *adap = i2c_adap->algo_data;
- volatile psc_smb_t *sp = (volatile psc_smb_t *)adap->psc_base;
struct i2c_msg *p;
int i, err = 0;
- sp->psc_ctrl = PSC_CTRL_ENABLE;
- au_sync();
+ WR(adap, PSC_CTRL, PSC_CTRL_ENABLE);
for (i = 0; !err && i < num; i++) {
p = &msgs[i];
@@ -293,14 +250,12 @@ au1550_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg *msgs, int num)
if (err == 0)
err = num;
- sp->psc_ctrl = PSC_CTRL_SUSPEND;
- au_sync();
+ WR(adap, PSC_CTRL, PSC_CTRL_SUSPEND);
return err;
}
-static u32
-au1550_func(struct i2c_adapter *adap)
+static u32 au1550_func(struct i2c_adapter *adap)
{
return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
}
@@ -312,57 +267,45 @@ static const struct i2c_algorithm au1550_algo = {
static void i2c_au1550_setup(struct i2c_au1550_data *priv)
{
- volatile psc_smb_t *sp = (volatile psc_smb_t *)priv->psc_base;
- u32 stat;
-
- sp->psc_ctrl = PSC_CTRL_DISABLE;
- au_sync();
- sp->psc_sel = PSC_SEL_PS_SMBUSMODE;
- sp->psc_smbcfg = 0;
- au_sync();
- sp->psc_ctrl = PSC_CTRL_ENABLE;
- au_sync();
- do {
- stat = sp->psc_smbstat;
- au_sync();
- } while ((stat & PSC_SMBSTAT_SR) == 0);
+ unsigned long cfg;
- sp->psc_smbcfg = (PSC_SMBCFG_RT_FIFO8 | PSC_SMBCFG_TT_FIFO8 |
- PSC_SMBCFG_DD_DISABLE);
+ WR(priv, PSC_CTRL, PSC_CTRL_DISABLE);
+ WR(priv, PSC_SEL, PSC_SEL_PS_SMBUSMODE);
+ WR(priv, PSC_SMBCFG, 0);
+ WR(priv, PSC_CTRL, PSC_CTRL_ENABLE);
+ while ((RD(priv, PSC_SMBSTAT) & PSC_SMBSTAT_SR) == 0)
+ cpu_relax();
+
+ cfg = PSC_SMBCFG_RT_FIFO8 | PSC_SMBCFG_TT_FIFO8 | PSC_SMBCFG_DD_DISABLE;
+ WR(priv, PSC_SMBCFG, cfg);
/* Divide by 8 to get a 6.25 MHz clock. The later protocol
* timings are based on this clock.
*/
- sp->psc_smbcfg |= PSC_SMBCFG_SET_DIV(PSC_SMBCFG_DIV8);
- sp->psc_smbmsk = PSC_SMBMSK_ALLMASK;
- au_sync();
+ cfg |= PSC_SMBCFG_SET_DIV(PSC_SMBCFG_DIV8);
+ WR(priv, PSC_SMBCFG, cfg);
+ WR(priv, PSC_SMBMSK, PSC_SMBMSK_ALLMASK);
/* Set the protocol timer values. See Table 71 in the
* Au1550 Data Book for standard timing values.
*/
- sp->psc_smbtmr = PSC_SMBTMR_SET_TH(0) | PSC_SMBTMR_SET_PS(15) | \
+ WR(priv, PSC_SMBTMR, PSC_SMBTMR_SET_TH(0) | PSC_SMBTMR_SET_PS(15) | \
PSC_SMBTMR_SET_PU(15) | PSC_SMBTMR_SET_SH(15) | \
PSC_SMBTMR_SET_SU(15) | PSC_SMBTMR_SET_CL(15) | \
- PSC_SMBTMR_SET_CH(15);
- au_sync();
+ PSC_SMBTMR_SET_CH(15));
- sp->psc_smbcfg |= PSC_SMBCFG_DE_ENABLE;
- do {
- stat = sp->psc_smbstat;
- au_sync();
- } while ((stat & PSC_SMBSTAT_SR) == 0);
+ cfg |= PSC_SMBCFG_DE_ENABLE;
+ WR(priv, PSC_SMBCFG, cfg);

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drivers/i2c/busses/i2c-bfin-twi.c

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drivers/i2c/busses/i2c-designware-core.c

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drivers/i2c/busses/i2c-designware-pcidrv.c

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drivers/i2c/busses/i2c-designware-platdrv.c

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drivers/i2c/busses/i2c-eg20t.c

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drivers/i2c/busses/i2c-nomadik.c

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drivers/i2c/busses/i2c-nuc900.c

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include/linux/i2c-omap.h

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