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authorAlexandre Belloni <alexandre.belloni@free-electrons.com>2015-09-30 12:57:10 +0200
committerAlexandre Belloni <alexandre.belloni@free-electrons.com>2016-02-17 17:53:03 +0100
commit4747639f01c9247250b351e02c179b337de7a159 (patch)
treebf12dd7899d53ede9288c0b19222d95cbf8d2fbd
parent6c38bda9ae4ac442b904416901c4dac6d2e53e70 (diff)
usb: gadget: atmel: access the PMC using regmap
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>
-rw-r--r--drivers/usb/gadget/udc/atmel_usba_udc.c20
-rw-r--r--drivers/usb/gadget/udc/atmel_usba_udc.h2
2 files changed, 12 insertions, 10 deletions
diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.c b/drivers/usb/gadget/udc/atmel_usba_udc.c
index 8755b2c..04265de 100644
--- a/drivers/usb/gadget/udc/atmel_usba_udc.c
+++ b/drivers/usb/gadget/udc/atmel_usba_udc.c
@@ -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;
diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.h b/drivers/usb/gadget/udc/atmel_usba_udc.h
index ea448a3..3e1c9d5 100644
--- a/drivers/usb/gadget/udc/atmel_usba_udc.h
+++ b/drivers/usb/gadget/udc/atmel_usba_udc.h
@@ -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)