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usb: gadget: atmel: access the PMC using regmap

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Use regmap to access the PMC to avoid using at91_pmc_read and
at91_pmc_write.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Alexandre Belloni 2015-09-30 12:57:10 +02:00
parent 6c38bda9ae
commit 4747639f01
2 changed files with 12 additions and 10 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

20
drivers/usb/gadget/udc/atmel_usba_udc.c
View file

@ -17,7 +17,9 @@
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/list.h>
#include <linux/mfd/syscon.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <linux/usb/atmel_usba_udc.h>
@ -1888,20 +1890,15 @@ static int atmel_usba_stop(struct usb_gadget *gadget)
#ifdef CONFIG_OF
static void at91sam9rl_toggle_bias(struct usba_udc *udc, int is_on)
{
unsigned int uckr = at91_pmc_read(AT91_CKGR_UCKR);
if (is_on)
at91_pmc_write(AT91_CKGR_UCKR, uckr | AT91_PMC_BIASEN);
else
at91_pmc_write(AT91_CKGR_UCKR, uckr & ~(AT91_PMC_BIASEN));
regmap_update_bits(udc->pmc, AT91_CKGR_UCKR, AT91_PMC_BIASEN,
is_on ? AT91_PMC_BIASEN : 0);
}
static void at91sam9g45_pulse_bias(struct usba_udc *udc)
{
unsigned int uckr = at91_pmc_read(AT91_CKGR_UCKR);
at91_pmc_write(AT91_CKGR_UCKR, uckr & ~(AT91_PMC_BIASEN));
at91_pmc_write(AT91_CKGR_UCKR, uckr | AT91_PMC_BIASEN);
regmap_update_bits(udc->pmc, AT91_CKGR_UCKR, AT91_PMC_BIASEN, 0);
regmap_update_bits(udc->pmc, AT91_CKGR_UCKR, AT91_PMC_BIASEN,
AT91_PMC_BIASEN);
}
static const struct usba_udc_errata at91sam9rl_errata = {
@ -1938,6 +1935,9 @@ static struct usba_ep * atmel_udc_of_init(struct platform_device *pdev,
return ERR_PTR(-EINVAL);
udc->errata = match->data;
udc->pmc = syscon_regmap_lookup_by_compatible("atmel,at91sam9g45-pmc");
if (udc->errata && IS_ERR(udc->pmc))
return ERR_CAST(udc->pmc);
udc->num_ep = 0;

2
drivers/usb/gadget/udc/atmel_usba_udc.h
View file

@ -354,6 +354,8 @@ struct usba_udc {
struct dentry *debugfs_root;
struct dentry *debugfs_regs;
#endif
struct regmap *pmc;
};
static inline struct usba_ep *to_usba_ep(struct usb_ep *ep)