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

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Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2007-09-02 17:09:23 +01:00 committed by Russell King
parent 435b6e94b8
commit 82d553c67d
1 changed files with 43 additions and 8 deletions
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51
drivers/net/irda/pxaficp_ir.c
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@ -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);
}