i2c: Remove CFG_SYS_I2C_MAX_HOPS

Now that this is always 0, remove it and the associated dead code.

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

README

@@ -773,19 +773,11 @@ The following options need to be configured:
 
 		CFG_SYS_I2C_DIRECT_BUS
 		define this, if you don't use i2c muxes on your hardware.
-		if CFG_SYS_I2C_MAX_HOPS is not defined or == 0 you can
-		omit this define.
-
-		CFG_SYS_I2C_MAX_HOPS
-		define how many muxes are maximal consecutively connected
-		on one i2c bus. If you not use i2c muxes, omit this
-		define.
 
 		CFG_SYS_I2C_BUSES
 		hold a list of buses you want to use, only used if
 		CFG_SYS_I2C_DIRECT_BUS is not defined, for example
-		a board with CFG_SYS_I2C_MAX_HOPS = 1 and
+		a board with CFG_SYS_NUM_I2C_BUSES = 9:
-		CFG_SYS_NUM_I2C_BUSES = 9:
 
 		 CFG_SYS_I2C_BUSES	{{0, {I2C_NULL_HOP}}, \
 					{0, {{I2C_MUX_PCA9547, 0x70, 1}}}, \

cmd/i2c.c

@@ -1698,18 +1698,6 @@ static int do_i2c_show_bus(struct cmd_tbl *cmdtp, int flag, int argc,
 
 		for (i = 0; i < CFG_SYS_NUM_I2C_BUSES; i++) {
 			printf("Bus %d:\t%s", i, I2C_ADAP_NR(i)->name);
-#ifndef CFG_SYS_I2C_DIRECT_BUS
-			int j;
-
-			for (j = 0; j < CFG_SYS_I2C_MAX_HOPS; j++) {
-				if (i2c_bus[i].next_hop[j].chip == 0)
-					break;
-				printf("->%s@0x%2x:%d",
-				       i2c_bus[i].next_hop[j].mux.name,
-				       i2c_bus[i].next_hop[j].chip,
-				       i2c_bus[i].next_hop[j].channel);
-			}
-#endif
 			printf("\n");
 		}
 #endif
@@ -1734,17 +1722,6 @@ static int do_i2c_show_bus(struct cmd_tbl *cmdtp, int flag, int argc,
 			return -1;
 		}
 		printf("Bus %d:\t%s", i, I2C_ADAP_NR(i)->name);
-#ifndef CFG_SYS_I2C_DIRECT_BUS
-			int j;
-			for (j = 0; j < CFG_SYS_I2C_MAX_HOPS; j++) {
-				if (i2c_bus[i].next_hop[j].chip == 0)
-					break;
-				printf("->%s@0x%2x:%d",
-				       i2c_bus[i].next_hop[j].mux.name,
-				       i2c_bus[i].next_hop[j].chip,
-				       i2c_bus[i].next_hop[j].channel);
-			}
-#endif
 		printf("\n");
 #endif
 	}

drivers/i2c/i2c_core.c

@@ -111,23 +111,6 @@ static int i2c_mux_set_all(void)
 	struct i2c_bus_hose *i2c_bus_tmp = &i2c_bus[I2C_BUS];
 	int i;
 
-	/* Connect requested bus if behind muxes */
-	if (i2c_bus_tmp->next_hop[0].chip != 0) {
-		/* Set all muxes along the path to that bus */
-		for (i = 0; i < CFG_SYS_I2C_MAX_HOPS; i++) {
-			int	ret;
-
-			if (i2c_bus_tmp->next_hop[i].chip == 0)
-				break;
-
-			ret = i2c_mux_set(I2C_ADAP,
-					i2c_bus_tmp->next_hop[i].mux.id,
-					i2c_bus_tmp->next_hop[i].chip,
-					i2c_bus_tmp->next_hop[i].channel);
-			if (ret != 0)
-				return ret;
-		}
-	}
 	return 0;
 }
 
@@ -140,26 +123,6 @@ static int i2c_mux_disconnect_all(void)
 	if (I2C_ADAP->init_done == 0)
 		return 0;
 
-	/* Disconnect current bus (turn off muxes if any) */
-	if ((i2c_bus_tmp->next_hop[0].chip != 0) &&
-	    (I2C_ADAP->init_done != 0)) {
-		i = CFG_SYS_I2C_MAX_HOPS;
-		do {
-			uint8_t	chip;
-			int ret;
-
-			chip = i2c_bus_tmp->next_hop[--i].chip;
-			if (chip == 0)
-				continue;
-
-			ret = I2C_ADAP->write(I2C_ADAP, chip, 0, 0, &buf, 1);
-			if (ret != 0) {
-				printf("i2c: mux disconnect error\n");
-				return ret;
-			}
-		} while (i > 0);
-	}
-
 	return 0;
 }
 #endif

include/i2c.h

@@ -645,15 +645,9 @@ void i2c_early_init_f(void);
  */
 #define I2C_RXTX_LEN	128	/* maximum tx/rx buffer length */
 
-#if !defined(CFG_SYS_I2C_MAX_HOPS)
 /* no muxes used bus = i2c adapters */
 #define CFG_SYS_I2C_DIRECT_BUS	1
-#define CFG_SYS_I2C_MAX_HOPS		0
 #define CFG_SYS_NUM_I2C_BUSES	ll_entry_count(struct i2c_adapter, i2c)
-#else
-/* we use i2c muxes */
-#undef CFG_SYS_I2C_DIRECT_BUS
-#endif
 
 struct i2c_adapter {
 	void		(*init)(struct i2c_adapter *adap, int speed,
@@ -712,7 +706,6 @@ struct i2c_next_hop {
 
 struct i2c_bus_hose {
 	int	adapter;
-	struct i2c_next_hop	next_hop[CFG_SYS_I2C_MAX_HOPS];
 };
 #define I2C_NULL_HOP	{{-1, ""}, 0, 0}
 extern struct i2c_bus_hose	i2c_bus[];