[ARM] pxa: update pxa irda driver to use clk support
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/drivers/net/irda/pxaficp_ir.c b/drivers/net/irda/pxaficp_ir.c
index 55ff0fb..8c09344 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 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 @@
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 @@
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 @@
/* 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 @@
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 @@
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 @@
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 @@
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 @@
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);
}