Merge tag 'clock' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull arm-soc clock driver changes from Olof Johansson:
 "The new clock subsystem was merged in linux-3.4 without any users,
  this now moves the first three platforms over to it: imx, mxs and
  spear.

  The series also contains the changes for the clock subsystem itself,
  since Mike preferred to have it together with the platforms that
  require these changes, in order to avoid interdependencies and
  conflicts."

Fix up trivial conflicts in arch/arm/mach-kirkwood/common.c (code
removed in one branch, added OF support in another) and
drivers/dma/imx-sdma.c (independent changes next to each other).

* tag 'clock' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (97 commits)
  clk: Fix CLK_SET_RATE_GATE flag validation in clk_set_rate().
  clk: Provide dummy clk_unregister()
  SPEAr: Update defconfigs
  SPEAr: Add SMI NOR partition info in dts files
  SPEAr: Switch to common clock framework
  SPEAr: Call clk_prepare() before calling clk_enable
  SPEAr: clk: Add General Purpose Timer Synthesizer clock
  SPEAr: clk: Add Fractional Synthesizer clock
  SPEAr: clk: Add Auxiliary Synthesizer clock
  SPEAr: clk: Add VCO-PLL Synthesizer clock
  SPEAr: Add DT bindings for SPEAr's timer
  ARM i.MX: remove now unused clock files
  ARM: i.MX6: implement clocks using common clock framework
  ARM i.MX35: implement clocks using common clock framework
  ARM i.MX5: implement clocks using common clock framework
  ARM: Kirkwood: Replace clock gating
  ARM: Orion: Audio: Add clk/clkdev support
  ARM: Orion: PCIE: Add support for clk
  ARM: Orion: XOR: Add support for clk
  ARM: Orion: CESA: Add support for clk
  ...

1 files changed, 31 insertions, 11 deletions

diff --git a/drivers/net/ethernet/marvell/mv643xx_eth.c b/drivers/net/ethernet/marvell/mv643xx_eth.c
index c8950da60e6..04d901d0ff6 100644
--- a/drivers/net/ethernet/marvell/mv643xx_eth.c
+++ b/drivers/net/ethernet/marvell/mv643xx_eth.c
@@ -57,6 +57,7 @@
 #include <linux/types.h>
 #include <linux/inet_lro.h>
 #include <linux/slab.h>
+#include <linux/clk.h>
 
 static char mv643xx_eth_driver_name[] = "mv643xx_eth";
 static char mv643xx_eth_driver_version[] = "1.4";
@@ -289,10 +290,10 @@ struct mv643xx_eth_shared_private {
         /*
          * Hardware-specific parameters.
          */
-        unsigned int t_clk;
         int extended_rx_coal_limit;
         int tx_bw_control;
         int tx_csum_limit;
+
 };
 
 #define TX_BW_CONTROL_ABSENT            0
@@ -431,6 +432,12 @@ struct mv643xx_eth_private {
         int tx_desc_sram_size;
         int txq_count;
         struct tx_queue txq[8];
+
+        /*
+         * Hardware-specific parameters.
+         */
+        struct clk *clk;
+        unsigned int t_clk;
 };
 
 
@@ -1010,7 +1017,7 @@ static void tx_set_rate(struct mv643xx_eth_private *mp, int rate, int burst)
         int mtu;
         int bucket_size;
 
-        token_rate = ((rate / 1000) * 64) / (mp->shared->t_clk / 1000);
+        token_rate = ((rate / 1000) * 64) / (mp->t_clk / 1000);
         if (token_rate > 1023)
                 token_rate = 1023;
 
@@ -1042,7 +1049,7 @@ static void txq_set_rate(struct tx_queue *txq, int rate, int burst)
         int token_rate;
         int bucket_size;
 
-        token_rate = ((rate / 1000) * 64) / (mp->shared->t_clk / 1000);
+        token_rate = ((rate / 1000) * 64) / (mp->t_clk / 1000);
         if (token_rate > 1023)
                 token_rate = 1023;
 
@@ -1309,7 +1316,7 @@ static unsigned int get_rx_coal(struct mv643xx_eth_private *mp)
                 temp = (val & 0x003fff00) >> 8;
 
         temp *= 64000000;
-        do_div(temp, mp->shared->t_clk);
+        do_div(temp, mp->t_clk);
 
         return (unsigned int)temp;
 }
@@ -1319,7 +1326,7 @@ static void set_rx_coal(struct mv643xx_eth_private *mp, unsigned int usec)
         u64 temp;
         u32 val;
 
-        temp = (u64)usec * mp->shared->t_clk;
+        temp = (u64)usec * mp->t_clk;
         temp += 31999999;
         do_div(temp, 64000000);
 
@@ -1345,7 +1352,7 @@ static unsigned int get_tx_coal(struct mv643xx_eth_private *mp)
 
         temp = (rdlp(mp, TX_FIFO_URGENT_THRESHOLD) & 0x3fff0) >> 4;
         temp *= 64000000;
-        do_div(temp, mp->shared->t_clk);
+        do_div(temp, mp->t_clk);
 
         return (unsigned int)temp;
 }
@@ -1354,7 +1361,7 @@ static void set_tx_coal(struct mv643xx_eth_private *mp, unsigned int usec)
 {
         u64 temp;
 
-        temp = (u64)usec * mp->shared->t_clk;
+        temp = (u64)usec * mp->t_clk;
         temp += 31999999;
         do_div(temp, 64000000);
 
@@ -2663,10 +2670,6 @@ static int mv643xx_eth_shared_probe(struct platform_device *pdev)
         if (dram)
                 mv643xx_eth_conf_mbus_windows(msp, dram);
 
-        /*
-         * Detect hardware parameters.
-         */
-        msp->t_clk = (pd != NULL && pd->t_clk != 0) ? pd->t_clk : 133000000;
         msp->tx_csum_limit = (pd != NULL && pd->tx_csum_limit) ?
                                         pd->tx_csum_limit : 9 * 1024;
         infer_hw_params(msp);
@@ -2891,6 +2894,18 @@ static int mv643xx_eth_probe(struct platform_device *pdev)
 
         mp->dev = dev;
 
+        /*
+         * Get the clk rate, if there is one, otherwise use the default.
+         */
+        mp->clk = clk_get(&pdev->dev, (pdev->id ? "1" : "0"));
+        if (!IS_ERR(mp->clk)) {
+                clk_prepare_enable(mp->clk);
+                mp->t_clk = clk_get_rate(mp->clk);
+        } else {
+                mp->t_clk = 133000000;
+                printk(KERN_WARNING "Unable to get clock");
+        }
+
         set_params(mp, pd);
         netif_set_real_num_tx_queues(dev, mp->txq_count);
         netif_set_real_num_rx_queues(dev, mp->rxq_count);
@@ -2979,6 +2994,11 @@ static int mv643xx_eth_remove(struct platform_device *pdev)
         if (mp->phy != NULL)
                 phy_detach(mp->phy);
         cancel_work_sync(&mp->tx_timeout_task);
+
+        if (!IS_ERR(mp->clk)) {
+                clk_disable_unprepare(mp->clk);
+                clk_put(mp->clk);
+        }
         free_netdev(mp->dev);
 
         platform_set_drvdata(pdev, NULL);