[ARM] pxa: update pxa irda driver to use clk support

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 43 insertions, 8 deletions

diff --git a/drivers/net/irda/pxaficp_ir.c b/drivers/net/irda/pxaficp_ir.c
index 55ff0fbe525a..8c09344f58dc 100644
--- a/drivers/net/irda/pxaficp_ir.c
+++ b/drivers/net/irda/pxaficp_ir.c
@@ -23,6 +23,7 @@
 #include <linux/dma-mapping.h>
 #include <linux/platform_device.h>
 #include <linux/pm.h>
+#include <linux/clk.h>
 
 #include <net/irda/irda.h>
 #include <net/irda/irmod.h>
@@ -87,8 +88,30 @@ struct pxa_irda {
 
         struct device           *dev;
         struct pxaficp_platform_data *pdata;
+        struct clk              *fir_clk;
+        struct clk              *sir_clk;
+        struct clk              *cur_clk;
 };
 
+static inline void pxa_irda_disable_clk(struct pxa_irda *si)
+{
+        if (si->cur_clk)
+                clk_disable(si->cur_clk);
+        si->cur_clk = NULL;
+}
+
+static inline void pxa_irda_enable_firclk(struct pxa_irda *si)
+{
+        si->cur_clk = si->fir_clk;
+        clk_enable(si->fir_clk);
+}
+
+static inline void pxa_irda_enable_sirclk(struct pxa_irda *si)
+{
+        si->cur_clk = si->sir_clk;
+        clk_enable(si->sir_clk);
+}
+
 
 #define IS_FIR(si)              ((si)->speed >= 4000000)
 #define IRDA_FRAME_SIZE_LIMIT   2047
@@ -134,7 +157,7 @@ static int pxa_irda_set_speed(struct pxa_irda *si, int speed)
                         DCSR(si->rxdma) &= ~DCSR_RUN;
                         /* disable FICP */
                         ICCR0 = 0;
-                        pxa_set_cken(CKEN_FICP, 0);
+                        pxa_irda_disable_clk(si);
 
                         /* set board transceiver to SIR mode */
                         si->pdata->transceiver_mode(si->dev, IR_SIRMODE);
@@ -144,7 +167,7 @@ static int pxa_irda_set_speed(struct pxa_irda *si, int speed)
                         pxa_gpio_mode(GPIO47_STTXD_MD);
 
                         /* enable the STUART clock */
-                        pxa_set_cken(CKEN_STUART, 1);
+                        pxa_irda_enable_sirclk(si);
                 }
 
                 /* disable STUART first */
@@ -169,7 +192,7 @@ static int pxa_irda_set_speed(struct pxa_irda *si, int speed)
                 /* disable STUART */
                 STIER = 0;
                 STISR = 0;
-                pxa_set_cken(CKEN_STUART, 0);
+                pxa_irda_disable_clk(si);
 
                 /* disable FICP first */
                 ICCR0 = 0;
@@ -182,7 +205,7 @@ static int pxa_irda_set_speed(struct pxa_irda *si, int speed)
                 pxa_gpio_mode(GPIO47_ICPTXD_MD);
 
                 /* enable the FICP clock */
-                pxa_set_cken(CKEN_FICP, 1);
+                pxa_irda_enable_firclk(si);
 
                 si->speed = speed;
                 pxa_irda_fir_dma_rx_start(si);
@@ -592,16 +615,15 @@ static void pxa_irda_shutdown(struct pxa_irda *si)
         STIER = 0;
         /* disable STUART SIR mode */
         STISR = 0;
-        /* disable the STUART clock */
-        pxa_set_cken(CKEN_STUART, 0);
 
         /* disable DMA */
         DCSR(si->txdma) &= ~DCSR_RUN;
         DCSR(si->rxdma) &= ~DCSR_RUN;
         /* disable FICP */
         ICCR0 = 0;
-        /* disable the FICP clock */
-        pxa_set_cken(CKEN_FICP, 0);
+
+        /* disable the STUART or FICP clocks */
+        pxa_irda_disable_clk(si);
 
         DRCMR17 = 0;
         DRCMR18 = 0;
@@ -792,6 +814,13 @@ static int pxa_irda_probe(struct platform_device *pdev)
         si->dev = &pdev->dev;
         si->pdata = pdev->dev.platform_data;
 
+        si->sir_clk = clk_get(&pdev->dev, "UARTCLK");
+        si->fir_clk = clk_get(&pdev->dev, "FICPCLK");
+        if (IS_ERR(si->sir_clk) || IS_ERR(si->fir_clk)) {
+                err = PTR_ERR(IS_ERR(si->sir_clk) ? si->sir_clk : si->fir_clk);
+                goto err_mem_4;
+        }
+
         /*
          * Initialise the SIR buffers
          */
@@ -831,6 +860,10 @@ static int pxa_irda_probe(struct platform_device *pdev)
 err_mem_5:
                 kfree(si->rx_buff.head);
 err_mem_4:
+                if (si->sir_clk && !IS_ERR(si->sir_clk))
+                        clk_put(si->sir_clk);
+                if (si->fir_clk && !IS_ERR(si->fir_clk))
+                        clk_put(si->fir_clk);
                 free_netdev(dev);
 err_mem_3:
                 release_mem_region(__PREG(FICP), 0x1c);
@@ -850,6 +883,8 @@ static int pxa_irda_remove(struct platform_device *_dev)
                 unregister_netdev(dev);
                 kfree(si->tx_buff.head);
                 kfree(si->rx_buff.head);
+                clk_put(si->fir_clk);
+                clk_put(si->sir_clk);
                 free_netdev(dev);
         }