[PATCH 3/4] mv643xx_eth: configurable t_clk
From: Lennert Buytenhek <hidden>
Date: 2008-03-19 20:17:32
Make t_clk configurable via platform device data (with the current hardcoded value, 133 MHz, being the default), as it varies across different chip families. Signed-off-by: Lennert Buytenhek <redacted> Index: linux-2.6.25-rc6/drivers/net/mv643xx_eth.c ===================================================================
--- linux-2.6.25-rc6.orig/drivers/net/mv643xx_eth.c
+++ linux-2.6.25-rc6/drivers/net/mv643xx_eth.c@@ -519,6 +519,8 @@ struct mv643xx_shared_private { spinlock_t phy_lock; u32 win_protect; + + unsigned int t_clk; }; struct mv643xx_private {
@@ -1129,7 +1131,6 @@ static irqreturn_t mv643xx_eth_int_handl * * INPUT: * struct mv643xx_private *mp Ethernet port - * unsigned int t_clk t_clk of the MV-643xx chip in HZ units * unsigned int delay Delay in usec * * OUTPUT:
@@ -1140,10 +1141,10 @@ static irqreturn_t mv643xx_eth_int_handl * */ static unsigned int eth_port_set_rx_coal(struct mv643xx_private *mp, - unsigned int t_clk, unsigned int delay) + unsigned int delay) { unsigned int port_num = mp->port_num; - unsigned int coal = ((t_clk / 1000000) * delay) / 64; + unsigned int coal = ((mp->shared->t_clk / 1000000) * delay) / 64; /* Set RX Coalescing mechanism */ wrl(mp, SDMA_CONFIG_REG(port_num),
@@ -1168,7 +1169,6 @@ static unsigned int eth_port_set_rx_coal * * INPUT: * struct mv643xx_private *mp Ethernet port - * unsigned int t_clk t_clk of the MV-643xx chip in HZ units * unsigned int delay Delay in uSeconds * * OUTPUT:
@@ -1179,9 +1179,9 @@ static unsigned int eth_port_set_rx_coal * */ static unsigned int eth_port_set_tx_coal(struct mv643xx_private *mp, - unsigned int t_clk, unsigned int delay) + unsigned int delay) { - unsigned int coal = ((t_clk / 1000000) * delay) / 64; + unsigned int coal = ((mp->shared->t_clk / 1000000) * delay) / 64; /* Set TX Coalescing mechanism */ wrl(mp, TX_FIFO_URGENT_THRESHOLD_REG(mp->port_num), coal << 4);
@@ -1423,11 +1423,11 @@ static int mv643xx_eth_open(struct net_d #ifdef MV643XX_COAL mp->rx_int_coal = - eth_port_set_rx_coal(mp, 133000000, MV643XX_RX_COAL); + eth_port_set_rx_coal(mp, MV643XX_RX_COAL); #endif mp->tx_int_coal = - eth_port_set_tx_coal(mp, 133000000, MV643XX_TX_COAL); + eth_port_set_tx_coal(mp, MV643XX_TX_COAL); /* Unmask phy and link status changes interrupts */ wrl(mp, INTERRUPT_EXTEND_MASK_REG(port_num), ETH_INT_UNMASK_ALL_EXT);
@@ -2063,6 +2063,7 @@ static int mv643xx_eth_shared_probe(stru goto out_free; spin_lock_init(&msp->phy_lock); + msp->t_clk = (pd != NULL) ? pd->t_clk : 133000000; platform_set_drvdata(pdev, msp);
Index: linux-2.6.25-rc6/include/linux/mv643xx_eth.h ===================================================================
--- linux-2.6.25-rc6.orig/include/linux/mv643xx_eth.h
+++ linux-2.6.25-rc6/include/linux/mv643xx_eth.h@@ -17,6 +17,7 @@ struct mv643xx_eth_shared_platform_data { struct mbus_dram_target_info *dram; + unsigned int t_clk; }; struct mv643xx_eth_platform_data { ----