i2c: Remove CFG_SYS_I2C_DIRECT_BUS

Now that this is always 1, remove it and the associated dead code.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heiko Schocher <hs@denx.de>

README

@@ -771,13 +771,8 @@ The following options need to be configured:
 		CFG_SYS_NUM_I2C_BUSES
 		Hold the number of i2c buses you want to use.
 
-		CFG_SYS_I2C_DIRECT_BUS
-		define this, if you don't use i2c muxes on your hardware.
-
 		CFG_SYS_I2C_BUSES
-		hold a list of buses you want to use, only used if
+		hold a list of buses you want to use
-		CFG_SYS_I2C_DIRECT_BUS is not defined, for example
-		a board with CFG_SYS_NUM_I2C_BUSES = 9:
 
 		 CFG_SYS_I2C_BUSES	{{0, {I2C_NULL_HOP}}, \
 					{0, {{I2C_MUX_PCA9547, 0x70, 1}}}, \

drivers/i2c/i2c_core.c

@@ -33,100 +33,8 @@ struct i2c_adapter *i2c_get_adapter(int index)
 	return i2c_adap_p;
 }
 
-#if !defined(CFG_SYS_I2C_DIRECT_BUS)
-struct i2c_bus_hose i2c_bus[CFG_SYS_NUM_I2C_BUSES] =
-			CFG_SYS_I2C_BUSES;
-#endif
-
 DECLARE_GLOBAL_DATA_PTR;
 
-#ifndef CFG_SYS_I2C_DIRECT_BUS
-/*
- * i2c_mux_set()
- * -------------
- *
- * This turns on the given channel on I2C multiplexer chip connected to
- * a given I2C adapter directly or via other multiplexers. In the latter
- * case the entire multiplexer chain must be initialized first starting
- * with the one connected directly to the adapter. When disabling a chain
- * muxes must be programmed in reverse order, starting with the one
- * farthest from the adapter.
- *
- * mux_id is the multiplexer chip type from defined in i2c.h. So far only
- * NXP (Philips) PCA954x multiplexers are supported. Switches are NOT
- * supported (anybody uses them?)
- */
-
-static int i2c_mux_set(struct i2c_adapter *adap, int mux_id, int chip,
-			int channel)
-{
-	uint8_t	buf;
-	int ret;
-
-	/* channel < 0 - turn off the mux */
-	if (channel < 0) {
-		buf = 0;
-		ret = adap->write(adap, chip, 0, 0, &buf, 1);
-		if (ret)
-			printf("%s: Could not turn off the mux.\n", __func__);
-		return ret;
-	}
-
-	switch (mux_id) {
-	case I2C_MUX_PCA9540_ID:
-	case I2C_MUX_PCA9542_ID:
-		if (channel > 1)
-			return -1;
-		buf = (uint8_t)((channel & 0x01) | (1 << 2));
-		break;
-	case I2C_MUX_PCA9544_ID:
-		if (channel > 3)
-			return -1;
-		buf = (uint8_t)((channel & 0x03) | (1 << 2));
-		break;
-	case I2C_MUX_PCA9547_ID:
-		if (channel > 7)
-			return -1;
-		buf = (uint8_t)((channel & 0x07) | (1 << 3));
-		break;
-	case I2C_MUX_PCA9548_ID:
-		if (channel > 7)
-			return -1;
-		buf = (uint8_t)(0x01 << channel);
-		break;
-	default:
-		printf("%s: wrong mux id: %d\n", __func__, mux_id);
-		return -1;
-	}
-
-	ret = adap->write(adap, chip, 0, 0, &buf, 1);
-	if (ret)
-		printf("%s: could not set mux: id: %d chip: %x channel: %d\n",
-		       __func__, mux_id, chip, channel);
-	return ret;
-}
-
-static int i2c_mux_set_all(void)
-{
-	struct i2c_bus_hose *i2c_bus_tmp = &i2c_bus[I2C_BUS];
-	int i;
-
-	return 0;
-}
-
-static int i2c_mux_disconnect_all(void)
-{
-	struct	i2c_bus_hose *i2c_bus_tmp = &i2c_bus[I2C_BUS];
-	int	i;
-	uint8_t	buf = 0;
-
-	if (I2C_ADAP->init_done == 0)
-		return 0;
-
-	return 0;
-}
-#endif
-
 /*
  * i2c_init_bus():
  * ---------------
@@ -200,11 +108,6 @@ int i2c_set_bus_num(unsigned int bus)
 	if ((bus == I2C_BUS) && (I2C_ADAP->init_done > 0))
 		return 0;
 
-#ifndef CFG_SYS_I2C_DIRECT_BUS
-	if (bus >= CFG_SYS_NUM_I2C_BUSES)
-		return -1;
-#endif
-
 	max = ll_entry_count(struct i2c_adapter, i2c);
 	if (I2C_ADAPTER(bus) >= max) {
 		printf("Error, wrong i2c adapter %d max %d possible\n",
@@ -212,17 +115,10 @@ int i2c_set_bus_num(unsigned int bus)
 		return -2;
 	}
 
-#ifndef CFG_SYS_I2C_DIRECT_BUS
-	i2c_mux_disconnect_all();
-#endif
-
 	gd->cur_i2c_bus = bus;
 	if (I2C_ADAP->init_done == 0)
 		i2c_init_bus(bus, I2C_ADAP->speed, I2C_ADAP->slaveaddr);
 
-#ifndef CFG_SYS_I2C_DIRECT_BUS
-	i2c_mux_set_all();
-#endif
 	return 0;
 }
 

include/i2c.h

@@ -646,7 +646,6 @@ void i2c_early_init_f(void);
 #define I2C_RXTX_LEN	128	/* maximum tx/rx buffer length */
 
 /* no muxes used bus = i2c adapters */
-#define CFG_SYS_I2C_DIRECT_BUS	1
 #define CFG_SYS_NUM_I2C_BUSES	ll_entry_count(struct i2c_adapter, i2c)
 
 struct i2c_adapter {
@@ -692,47 +691,13 @@ struct i2c_adapter {
 
 struct i2c_adapter *i2c_get_adapter(int index);
 
-#ifndef CFG_SYS_I2C_DIRECT_BUS
-struct i2c_mux {
-	int	id;
-	char	name[16];
-};
-
-struct i2c_next_hop {
-	struct i2c_mux		mux;
-	uint8_t		chip;
-	uint8_t		channel;
-};
-
-struct i2c_bus_hose {
-	int	adapter;
-};
-#define I2C_NULL_HOP	{{-1, ""}, 0, 0}
-extern struct i2c_bus_hose	i2c_bus[];
-
-#define I2C_ADAPTER(bus)	i2c_bus[bus].adapter
-#else
 #define I2C_ADAPTER(bus)	bus
-#endif
 #define	I2C_BUS			gd->cur_i2c_bus
 
 #define	I2C_ADAP_NR(bus)	i2c_get_adapter(I2C_ADAPTER(bus))
 #define	I2C_ADAP		I2C_ADAP_NR(gd->cur_i2c_bus)
 #define I2C_ADAP_HWNR		(I2C_ADAP->hwadapnr)
 
-#ifndef CFG_SYS_I2C_DIRECT_BUS
-#define I2C_MUX_PCA9540_ID	1
-#define I2C_MUX_PCA9540		{I2C_MUX_PCA9540_ID, "PCA9540B"}
-#define I2C_MUX_PCA9542_ID	2
-#define I2C_MUX_PCA9542		{I2C_MUX_PCA9542_ID, "PCA9542A"}
-#define I2C_MUX_PCA9544_ID	3
-#define I2C_MUX_PCA9544		{I2C_MUX_PCA9544_ID, "PCA9544A"}
-#define I2C_MUX_PCA9547_ID	4
-#define I2C_MUX_PCA9547		{I2C_MUX_PCA9547_ID, "PCA9547A"}
-#define I2C_MUX_PCA9548_ID	5
-#define I2C_MUX_PCA9548		{I2C_MUX_PCA9548_ID, "PCA9548"}
-#endif
-
 #ifndef I2C_SOFT_DECLARATIONS
 # if (defined(CONFIG_AT91RM9200) || \
 	defined(CONFIG_AT91SAM9260) ||  defined(CONFIG_AT91SAM9261) || \