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Commit 82d553c6 authored by Russell King's avatar Russell King Committed by Russell King
Browse files

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



Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 435b6e94

drivers/net/irda/pxaficp_ir.c

+43 −8
Original line number Diff line number Diff line
@@ -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);

	}