diff options
author | Sascha Hauer <s.hauer@pengutronix.de> | 2012-09-05 12:59:29 +0200 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2012-09-05 12:59:29 +0200 |
commit | 038307cb5e6e0e655ec251f561959afd2ef1bfd1 (patch) | |
tree | 6e1cf4b97c46565e21ff7e9ef2d222d281bc972c /drivers | |
parent | 4c9d8da6fea91a49476b86bb92996a0480478537 (diff) | |
parent | 075209e8f3a78f5ae5e5c239ab3120db263b51c2 (diff) | |
download | barebox-038307cb5e6e0e655ec251f561959afd2ef1bfd1.tar.gz barebox-038307cb5e6e0e655ec251f561959afd2ef1bfd1.tar.xz |
Merge branch 'for-next/i2c'
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/i2c/busses/Kconfig | 4 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-imx.c | 324 |
2 files changed, 200 insertions, 128 deletions
diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig index 1ce5c00276..3f998eafa5 100644 --- a/drivers/i2c/busses/Kconfig +++ b/drivers/i2c/busses/Kconfig @@ -5,8 +5,8 @@ menu "I2C Hardware Bus support" config I2C_IMX - bool "i.MX I2C Master driver" - depends on ARCH_IMX && !ARCH_IMX1 + bool "MPC85xx/i.MX I2C Master driver" + depends on (ARCH_IMX && !ARCH_IMX1) || ARCH_MPC85XX config I2C_OMAP bool "OMAP I2C Master driver" diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c index da6218f43c..60182042db 100644 --- a/drivers/i2c/busses/i2c-imx.c +++ b/drivers/i2c/busses/i2c-imx.c @@ -1,4 +1,5 @@ /* + * Copyright 2012 GE Intelligent Platforms, Inc * Copyright (C) 2002 Motorola GSG-China * 2009 Marc Kleine-Budde, Pengutronix * @@ -22,7 +23,8 @@ * * Desc.: * Implementation of I2C Adapter/Algorithm Driver - * for I2C Bus integrated in Freescale i.MX/MXC processors + * for I2C Bus integrated in Freescale i.MX/MXC processors and + * 85xx processors. * * Derived from Motorola GSG China I2C example driver * @@ -36,7 +38,6 @@ #include <clock.h> #include <common.h> #include <driver.h> -#include <gpio.h> #include <init.h> #include <malloc.h> #include <types.h> @@ -46,23 +47,23 @@ #include <io.h> #include <i2c/i2c.h> -#include <mach/generic.h> #include <mach/clock.h> /* This will be the driver name */ -#define DRIVER_NAME "i2c-imx" +#define DRIVER_NAME "i2c-fsl" /* Default value */ -#define IMX_I2C_BIT_RATE 100000 /* 100kHz */ +#define FSL_I2C_BIT_RATE 100000 /* 100kHz */ -/* IMX I2C registers */ -#define IMX_I2C_IADR 0x00 /* i2c slave address */ -#define IMX_I2C_IFDR 0x04 /* i2c frequency divider */ -#define IMX_I2C_I2CR 0x08 /* i2c control */ -#define IMX_I2C_I2SR 0x0C /* i2c status */ -#define IMX_I2C_I2DR 0x10 /* i2c transfer data */ +/* FSL I2C registers */ +#define FSL_I2C_IADR 0x00 /* i2c slave address */ +#define FSL_I2C_IFDR 0x04 /* i2c frequency divider */ +#define FSL_I2C_I2CR 0x08 /* i2c control */ +#define FSL_I2C_I2SR 0x0C /* i2c status */ +#define FSL_I2C_I2DR 0x10 /* i2c transfer data */ +#define FSL_I2C_DFSRR 0x14 /* i2c digital filter sampling rate */ -/* Bits of IMX I2C registers */ +/* Bits of FSL I2C registers */ #define I2SR_RXAK 0x01 #define I2SR_IIF 0x02 #define I2SR_SRW 0x04 @@ -85,6 +86,7 @@ * * Duplicated divider values removed from list */ +#ifndef CONFIG_PPC static u16 i2c_clk_div[50][2] = { { 22, 0x20 }, { 24, 0x21 }, { 26, 0x22 }, { 28, 0x23 }, { 30, 0x00 }, { 32, 0x24 }, { 36, 0x25 }, { 40, 0x26 }, @@ -100,24 +102,26 @@ static u16 i2c_clk_div[50][2] = { { 1920, 0x1B }, { 2048, 0x3F }, { 2304, 0x1C }, { 2560, 0x1D }, { 3072, 0x1E }, { 3840, 0x1F } }; +#endif -struct imx_i2c_struct { +struct fsl_i2c_struct { void __iomem *base; struct i2c_adapter adapter; unsigned int disable_delay; int stopped; - unsigned int ifdr; /* IMX_I2C_IFDR */ + unsigned int ifdr; /* FSL_I2C_IFDR */ + unsigned int dfsrr; /* FSL_I2C_DFSRR */ }; -#define to_imx_i2c_struct(a) container_of(a, struct imx_i2c_struct, adapter) +#define to_fsl_i2c_struct(a) container_of(a, struct fsl_i2c_struct, adapter) #ifdef CONFIG_I2C_DEBUG -static void i2c_imx_dump_reg(struct i2c_adapter *adapter) +static void i2c_fsl_dump_reg(struct i2c_adapter *adapter) { - struct imx_i2c_struct *i2c_imx = to_imx_i2c_struct(adapter); + struct fsl_i2c_struct *i2c_fsl = to_fsl_i2c_struct(adapter); u32 reg_cr, reg_sr; - reg_cr = readb(i2c_imx->base + IMX_I2C_I2CR); - reg_sr = readb(i2c_imx->base + IMX_I2C_I2SR); + reg_cr = readb(i2c_fsl->base + FSL_I2C_I2CR); + reg_sr = readb(i2c_fsl->base + FSL_I2C_I2SR); dev_dbg(adapter->dev, "CONTROL:\t" "IEN =%d, IIEN=%d, MSTA=%d, MTX =%d, TXAK=%d, RSTA=%d\n", @@ -133,22 +137,22 @@ static void i2c_imx_dump_reg(struct i2c_adapter *adapter) (reg_sr & I2SR_RXAK ? 1 : 0)); } #else -static inline void i2c_imx_dump_reg(struct i2c_adapter *adapter) +static inline void i2c_fsl_dump_reg(struct i2c_adapter *adapter) { return; } #endif -static int i2c_imx_bus_busy(struct i2c_adapter *adapter, int for_busy) +static int i2c_fsl_bus_busy(struct i2c_adapter *adapter, int for_busy) { - struct imx_i2c_struct *i2c_imx = to_imx_i2c_struct(adapter); - void __iomem *base = i2c_imx->base; + struct fsl_i2c_struct *i2c_fsl = to_fsl_i2c_struct(adapter); + void __iomem *base = i2c_fsl->base; uint64_t start; unsigned int temp; start = get_time_ns(); while (1) { - temp = readb(base + IMX_I2C_I2SR); + temp = readb(base + FSL_I2C_I2SR); if (for_busy && (temp & I2SR_IBB)) break; if (!for_busy && !(temp & I2SR_IBB)) @@ -164,15 +168,15 @@ static int i2c_imx_bus_busy(struct i2c_adapter *adapter, int for_busy) return 0; } -static int i2c_imx_trx_complete(struct i2c_adapter *adapter) +static int i2c_fsl_trx_complete(struct i2c_adapter *adapter) { - struct imx_i2c_struct *i2c_imx = to_imx_i2c_struct(adapter); - void __iomem *base = i2c_imx->base; + struct fsl_i2c_struct *i2c_fsl = to_fsl_i2c_struct(adapter); + void __iomem *base = i2c_fsl->base; uint64_t start; start = get_time_ns(); while (1) { - unsigned int reg = readb(base + IMX_I2C_I2SR); + unsigned int reg = readb(base + FSL_I2C_I2SR); if (reg & I2SR_IIF) break; @@ -181,20 +185,20 @@ static int i2c_imx_trx_complete(struct i2c_adapter *adapter) return -EIO; } } - writeb(0, base + IMX_I2C_I2SR); + writeb(0, base + FSL_I2C_I2SR); return 0; } -static int i2c_imx_acked(struct i2c_adapter *adapter) +static int i2c_fsl_acked(struct i2c_adapter *adapter) { - struct imx_i2c_struct *i2c_imx = to_imx_i2c_struct(adapter); - void __iomem *base = i2c_imx->base; + struct fsl_i2c_struct *i2c_fsl = to_fsl_i2c_struct(adapter); + void __iomem *base = i2c_fsl->base; uint64_t start; start = get_time_ns(); while (1) { - unsigned int reg = readb(base + IMX_I2C_I2SR); + unsigned int reg = readb(base + FSL_I2C_I2SR); if (!(reg & I2SR_RXAK)) break; @@ -207,71 +211,137 @@ static int i2c_imx_acked(struct i2c_adapter *adapter) return 0; } -static int i2c_imx_start(struct i2c_adapter *adapter) +static int i2c_fsl_start(struct i2c_adapter *adapter) { - struct imx_i2c_struct *i2c_imx = to_imx_i2c_struct(adapter); - void __iomem *base = i2c_imx->base; + struct fsl_i2c_struct *i2c_fsl = to_fsl_i2c_struct(adapter); + void __iomem *base = i2c_fsl->base; unsigned int temp = 0; int result; - writeb(i2c_imx->ifdr, base + IMX_I2C_IFDR); + writeb(i2c_fsl->ifdr, base + FSL_I2C_IFDR); + if (i2c_fsl->dfsrr != -1) + writeb(i2c_fsl->dfsrr, base + FSL_I2C_DFSRR); + /* Enable I2C controller */ - writeb(0, base + IMX_I2C_I2SR); - writeb(I2CR_IEN, base + IMX_I2C_I2CR); + writeb(0, base + FSL_I2C_I2SR); + writeb(I2CR_IEN, base + FSL_I2C_I2CR); /* Wait controller to be stable */ udelay(100); /* Start I2C transaction */ - temp = readb(base + IMX_I2C_I2CR); + temp = readb(base + FSL_I2C_I2CR); temp |= I2CR_MSTA; - writeb(temp, base + IMX_I2C_I2CR); + writeb(temp, base + FSL_I2C_I2CR); - result = i2c_imx_bus_busy(adapter, 1); + result = i2c_fsl_bus_busy(adapter, 1); if (result) return result; - i2c_imx->stopped = 0; + i2c_fsl->stopped = 0; temp |= I2CR_MTX | I2CR_TXAK; - writeb(temp, base + IMX_I2C_I2CR); + writeb(temp, base + FSL_I2C_I2CR); return result; } -static void i2c_imx_stop(struct i2c_adapter *adapter) +static void i2c_fsl_stop(struct i2c_adapter *adapter) { - struct imx_i2c_struct *i2c_imx = to_imx_i2c_struct(adapter); - void __iomem *base = i2c_imx->base; + struct fsl_i2c_struct *i2c_fsl = to_fsl_i2c_struct(adapter); + void __iomem *base = i2c_fsl->base; unsigned int temp = 0; - if (!i2c_imx->stopped) { + if (!i2c_fsl->stopped) { /* Stop I2C transaction */ - temp = readb(base + IMX_I2C_I2CR); + temp = readb(base + FSL_I2C_I2CR); temp &= ~(I2CR_MSTA | I2CR_MTX); - writeb(temp, base + IMX_I2C_I2CR); + writeb(temp, base + FSL_I2C_I2CR); /* wait for the stop condition to be send, otherwise the i2c * controller is disabled before the STOP is sent completely */ - i2c_imx->stopped = i2c_imx_bus_busy(adapter, 0) ? 0 : 1; - } - if (cpu_is_mx1()) { - /* - * This delay caused by an i.MXL hardware bug. - * If no (or too short) delay, no "STOP" bit will be generated. - */ - udelay(i2c_imx->disable_delay); + i2c_fsl->stopped = i2c_fsl_bus_busy(adapter, 0) ? 0 : 1; } - if (!i2c_imx->stopped) { - i2c_imx_bus_busy(adapter, 0); - i2c_imx->stopped = 1; + if (!i2c_fsl->stopped) { + i2c_fsl_bus_busy(adapter, 0); + i2c_fsl->stopped = 1; } /* Disable I2C controller, and force our state to stopped */ - writeb(0, base + IMX_I2C_I2CR); + writeb(0, base + FSL_I2C_I2CR); } -static void i2c_imx_set_clk(struct imx_i2c_struct *i2c_imx, +#ifdef CONFIG_PPC +static void i2c_fsl_set_clk(struct fsl_i2c_struct *i2c_fsl, + unsigned int rate) +{ + void __iomem *base; + unsigned int i2c_clk; + unsigned short divider; + /* + * We want to choose an FDR/DFSR that generates an I2C bus speed that + * is equal to or lower than the requested speed. That means that we + * want the first divider that is equal to or greater than the + * calculated divider. + */ + u8 dfsr, fdr; + /* a, b and dfsr matches identifiers A,B and C respectively in AN2919 */ + unsigned short a, b, ga, gb; + unsigned long c_div, est_div; + + fdr = 0x31; /* Default if no FDR found */ + base = i2c_fsl->base; + i2c_clk = fsl_get_i2c_freq(); + divider = min((unsigned short)(i2c_clk / rate), (unsigned short) -1); + + /* + * Condition 1: dfsr <= 50ns/T (T=period of I2C source clock in ns). + * or (dfsr * T) <= 50ns. + * Translate to dfsr = 5 * Frequency / 100,000,000 + */ + dfsr = (5 * (i2c_clk / 1000)) / 100000; + dev_dbg(i2c_fsl->adapter.dev, + "<%s> requested speed:%d, i2c_clk:%d\n", __func__, + rate, i2c_clk); + if (!dfsr) + dfsr = 1; + + est_div = ~0; + for (ga = 0x4, a = 10; a <= 30; ga++, a += 2) { + for (gb = 0; gb < 8; gb++) { + b = 16 << gb; + c_div = b * (a + ((3*dfsr)/b)*2); + if ((c_div > divider) && (c_div < est_div)) { + unsigned short bin_gb, bin_ga; + + est_div = c_div; + bin_gb = gb << 2; + bin_ga = (ga & 0x3) | ((ga & 0x4) << 3); + fdr = bin_gb | bin_ga; + rate = i2c_clk / est_div; + dev_dbg(i2c_fsl->adapter.dev, + "FDR:0x%.2x, div:%ld, ga:0x%x, gb:0x%x," + " a:%d, b:%d, speed:%d\n", fdr, est_div, + ga, gb, a, b, rate); + /* Condition 2 not accounted for */ + dev_dbg(i2c_fsl->adapter.dev, + "Tr <= %d ns\n", (b - 3 * dfsr) * + 1000000 / (i2c_clk / 1000)); + } + } + if (a == 20) + a += 2; + if (a == 24) + a += 4; + } + dev_dbg(i2c_fsl->adapter.dev, + "divider:%d, est_div:%ld, DFSR:%d\n", divider, est_div, dfsr); + dev_dbg(i2c_fsl->adapter.dev, "FDR:0x%.2x, speed:%d\n", fdr, rate); + i2c_fsl->ifdr = fdr; + i2c_fsl->dfsrr = dfsr; +} +#else +static void i2c_fsl_set_clk(struct fsl_i2c_struct *i2c_fsl, unsigned int rate) { unsigned int i2c_clk_rate; @@ -279,7 +349,7 @@ static void i2c_imx_set_clk(struct imx_i2c_struct *i2c_imx, int i; /* Divider value calculation */ - i2c_clk_rate = imx_get_i2cclk(); + i2c_clk_rate = fsl_get_i2cclk(); div = (i2c_clk_rate + rate - 1) / rate; if (div < i2c_clk_div[0][0]) i = 0; @@ -290,7 +360,7 @@ static void i2c_imx_set_clk(struct imx_i2c_struct *i2c_imx, ; /* Store divider value */ - i2c_imx->ifdr = i2c_clk_div[i][1]; + i2c_fsl->ifdr = i2c_clk_div[i][1]; /* * There dummy delay is calculated. @@ -298,20 +368,21 @@ static void i2c_imx_set_clk(struct imx_i2c_struct *i2c_imx, * This delay is used in I2C bus disable function * to fix chip hardware bug. */ - i2c_imx->disable_delay = + i2c_fsl->disable_delay = (500000U * i2c_clk_div[i][0] + (i2c_clk_rate / 2) - 1) / (i2c_clk_rate / 2); - dev_dbg(i2c_imx->adapter.dev, "<%s> I2C_CLK=%d, REQ DIV=%d\n", + dev_dbg(i2c_fsl->adapter.dev, "<%s> I2C_CLK=%d, REQ DIV=%d\n", __func__, i2c_clk_rate, div); - dev_dbg(i2c_imx->adapter.dev, "<%s> IFDR[IC]=0x%x, REAL DIV=%d\n", + dev_dbg(i2c_fsl->adapter.dev, "<%s> IFDR[IC]=0x%x, REAL DIV=%d\n", __func__, i2c_clk_div[i][1], i2c_clk_div[i][0]); } +#endif -static int i2c_imx_write(struct i2c_adapter *adapter, struct i2c_msg *msgs) +static int i2c_fsl_write(struct i2c_adapter *adapter, struct i2c_msg *msgs) { - struct imx_i2c_struct *i2c_imx = to_imx_i2c_struct(adapter); - void __iomem *base = i2c_imx->base; + struct fsl_i2c_struct *i2c_fsl = to_fsl_i2c_struct(adapter); + void __iomem *base = i2c_fsl->base; int i, result; if ( !(msgs->flags & I2C_M_DATA_ONLY) ) { @@ -320,12 +391,12 @@ static int i2c_imx_write(struct i2c_adapter *adapter, struct i2c_msg *msgs) __func__, msgs->addr << 1); /* write slave address */ - writeb(msgs->addr << 1, base + IMX_I2C_I2DR); + writeb(msgs->addr << 1, base + FSL_I2C_I2DR); - result = i2c_imx_trx_complete(adapter); + result = i2c_fsl_trx_complete(adapter); if (result) return result; - result = i2c_imx_acked(adapter); + result = i2c_fsl_acked(adapter); if (result) return result; } @@ -335,27 +406,27 @@ static int i2c_imx_write(struct i2c_adapter *adapter, struct i2c_msg *msgs) dev_dbg(adapter->dev, "<%s> write byte: B%d=0x%02X\n", __func__, i, msgs->buf[i]); - writeb(msgs->buf[i], base + IMX_I2C_I2DR); + writeb(msgs->buf[i], base + FSL_I2C_I2DR); - result = i2c_imx_trx_complete(adapter); + result = i2c_fsl_trx_complete(adapter); if (result) return result; - result = i2c_imx_acked(adapter); + result = i2c_fsl_acked(adapter); if (result) return result; } return 0; } -static int i2c_imx_read(struct i2c_adapter *adapter, struct i2c_msg *msgs) +static int i2c_fsl_read(struct i2c_adapter *adapter, struct i2c_msg *msgs) { - struct imx_i2c_struct *i2c_imx = to_imx_i2c_struct(adapter); - void __iomem *base = i2c_imx->base; + struct fsl_i2c_struct *i2c_fsl = to_fsl_i2c_struct(adapter); + void __iomem *base = i2c_fsl->base; int i, result; unsigned int temp; /* clear IIF */ - writeb(0x0, base + IMX_I2C_I2SR); + writeb(0x0, base + FSL_I2C_I2SR); if ( !(msgs->flags & I2C_M_DATA_ONLY) ) { dev_dbg(adapter->dev, @@ -363,28 +434,28 @@ static int i2c_imx_read(struct i2c_adapter *adapter, struct i2c_msg *msgs) __func__, (msgs->addr << 1) | 0x01); /* write slave address */ - writeb((msgs->addr << 1) | 0x01, base + IMX_I2C_I2DR); + writeb((msgs->addr << 1) | 0x01, base + FSL_I2C_I2DR); - result = i2c_imx_trx_complete(adapter); + result = i2c_fsl_trx_complete(adapter); if (result) return result; - result = i2c_imx_acked(adapter); + result = i2c_fsl_acked(adapter); if (result) return result; } /* setup bus to read data */ - temp = readb(base + IMX_I2C_I2CR); + temp = readb(base + FSL_I2C_I2CR); temp &= ~I2CR_MTX; if (msgs->len - 1) temp &= ~I2CR_TXAK; - writeb(temp, base + IMX_I2C_I2CR); + writeb(temp, base + FSL_I2C_I2CR); - readb(base + IMX_I2C_I2DR); /* dummy read */ + readb(base + FSL_I2C_I2DR); /* dummy read */ /* read data */ for (i = 0; i < msgs->len; i++) { - result = i2c_imx_trx_complete(adapter); + result = i2c_fsl_trx_complete(adapter); if (result) return result; @@ -393,23 +464,23 @@ static int i2c_imx_read(struct i2c_adapter *adapter, struct i2c_msg *msgs) * It must generate STOP before read I2DR to prevent * controller from generating another clock cycle */ - temp = readb(base + IMX_I2C_I2CR); + temp = readb(base + FSL_I2C_I2CR); temp &= ~(I2CR_MSTA | I2CR_MTX); - writeb(temp, base + IMX_I2C_I2CR); + writeb(temp, base + FSL_I2C_I2CR); /* * adding this delay helps on low bitrates */ - udelay(i2c_imx->disable_delay); + udelay(i2c_fsl->disable_delay); - i2c_imx_bus_busy(adapter, 0); - i2c_imx->stopped = 1; + i2c_fsl_bus_busy(adapter, 0); + i2c_fsl->stopped = 1; } else if (i == (msgs->len - 2)) { - temp = readb(base + IMX_I2C_I2CR); + temp = readb(base + FSL_I2C_I2CR); temp |= I2CR_TXAK; - writeb(temp, base + IMX_I2C_I2CR); + writeb(temp, base + FSL_I2C_I2CR); } - msgs->buf[i] = readb(base + IMX_I2C_I2DR); + msgs->buf[i] = readb(base + FSL_I2C_I2DR); dev_dbg(adapter->dev, "<%s> read byte: B%d=0x%02X\n", __func__, i, msgs->buf[i]); @@ -417,76 +488,77 @@ static int i2c_imx_read(struct i2c_adapter *adapter, struct i2c_msg *msgs) return 0; } -static int i2c_imx_xfer(struct i2c_adapter *adapter, +static int i2c_fsl_xfer(struct i2c_adapter *adapter, struct i2c_msg *msgs, int num) { - struct imx_i2c_struct *i2c_imx = to_imx_i2c_struct(adapter); - void __iomem *base = i2c_imx->base; + struct fsl_i2c_struct *i2c_fsl = to_fsl_i2c_struct(adapter); + void __iomem *base = i2c_fsl->base; unsigned int i, temp; int result; /* Start I2C transfer */ - result = i2c_imx_start(adapter); + result = i2c_fsl_start(adapter); if (result) goto fail0; /* read/write data */ for (i = 0; i < num; i++) { if (i && !(msgs[i].flags & I2C_M_DATA_ONLY)) { - temp = readb(base + IMX_I2C_I2CR); + temp = readb(base + FSL_I2C_I2CR); temp |= I2CR_RSTA; - writeb(temp, base + IMX_I2C_I2CR); + writeb(temp, base + FSL_I2C_I2CR); - result = i2c_imx_bus_busy(adapter, 1); + result = i2c_fsl_bus_busy(adapter, 1); if (result) goto fail0; } - i2c_imx_dump_reg(adapter); + i2c_fsl_dump_reg(adapter); /* write/read data */ if (msgs[i].flags & I2C_M_RD) - result = i2c_imx_read(adapter, &msgs[i]); + result = i2c_fsl_read(adapter, &msgs[i]); else - result = i2c_imx_write(adapter, &msgs[i]); + result = i2c_fsl_write(adapter, &msgs[i]); if (result) goto fail0; } fail0: /* Stop I2C transfer */ - i2c_imx_stop(adapter); + i2c_fsl_stop(adapter); return (result < 0) ? result : num; } -static int __init i2c_imx_probe(struct device_d *pdev) +static int __init i2c_fsl_probe(struct device_d *pdev) { - struct imx_i2c_struct *i2c_imx; + struct fsl_i2c_struct *i2c_fsl; struct i2c_platform_data *pdata; int ret; pdata = pdev->platform_data; - i2c_imx = kzalloc(sizeof(struct imx_i2c_struct), GFP_KERNEL); + i2c_fsl = kzalloc(sizeof(struct fsl_i2c_struct), GFP_KERNEL); - /* Setup i2c_imx driver structure */ - i2c_imx->adapter.master_xfer = i2c_imx_xfer; - i2c_imx->adapter.nr = pdev->id; - i2c_imx->adapter.dev = pdev; - i2c_imx->base = dev_request_mem_region(pdev, 0); + /* Setup i2c_fsl driver structure */ + i2c_fsl->adapter.master_xfer = i2c_fsl_xfer; + i2c_fsl->adapter.nr = pdev->id; + i2c_fsl->adapter.dev = pdev; + i2c_fsl->base = dev_request_mem_region(pdev, 0); + i2c_fsl->dfsrr = -1; /* Set up clock divider */ if (pdata && pdata->bitrate) - i2c_imx_set_clk(i2c_imx, pdata->bitrate); + i2c_fsl_set_clk(i2c_fsl, pdata->bitrate); else - i2c_imx_set_clk(i2c_imx, IMX_I2C_BIT_RATE); + i2c_fsl_set_clk(i2c_fsl, FSL_I2C_BIT_RATE); /* Set up chip registers to defaults */ - writeb(0, i2c_imx->base + IMX_I2C_I2CR); - writeb(0, i2c_imx->base + IMX_I2C_I2SR); + writeb(0, i2c_fsl->base + FSL_I2C_I2CR); + writeb(0, i2c_fsl->base + FSL_I2C_I2SR); /* Add I2C adapter */ - ret = i2c_add_numbered_adapter(&i2c_imx->adapter); + ret = i2c_add_numbered_adapter(&i2c_fsl->adapter); if (ret < 0) { dev_err(pdev, "registration failed\n"); goto fail; @@ -495,17 +567,17 @@ static int __init i2c_imx_probe(struct device_d *pdev) return 0; fail: - kfree(i2c_imx); + kfree(i2c_fsl); return ret; } -static struct driver_d i2c_imx_driver = { - .probe = i2c_imx_probe, +static struct driver_d i2c_fsl_driver = { + .probe = i2c_fsl_probe, .name = DRIVER_NAME, }; -static int __init i2c_adap_imx_init(void) +static int __init i2c_adap_fsl_init(void) { - return register_driver(&i2c_imx_driver); + return register_driver(&i2c_fsl_driver); } -device_initcall(i2c_adap_imx_init); +device_initcall(i2c_adap_fsl_init); |