summaryrefslogtreecommitdiff
path: root/drivers/ptp
diff options
context:
space:
mode:
authorDavid S. Miller <davem@davemloft.net>2020-08-23 21:48:27 +0300
committerDavid S. Miller <davem@davemloft.net>2020-08-23 21:48:27 +0300
commit7611cbb900b4b9a6fe5eca12fb12645c0576a015 (patch)
tree9c8c8e1fa991e4728d25a19b86c974c8e49ee1b7 /drivers/ptp
parentd7223aa5867134b9923b42e1245801bd790a1d8c (diff)
parentcb95712138ec5e480db5160b41172bbc6f6494cc (diff)
downloadlinux-7611cbb900b4b9a6fe5eca12fb12645c0576a015.tar.xz
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Diffstat (limited to 'drivers/ptp')
-rw-r--r--drivers/ptp/ptp_clockmatrix.c56
-rw-r--r--drivers/ptp/ptp_clockmatrix.h2
2 files changed, 45 insertions, 13 deletions
diff --git a/drivers/ptp/ptp_clockmatrix.c b/drivers/ptp/ptp_clockmatrix.c
index 73aaae5574ed..e020faff7da5 100644
--- a/drivers/ptp/ptp_clockmatrix.c
+++ b/drivers/ptp/ptp_clockmatrix.c
@@ -142,16 +142,15 @@ static int idtcm_strverscmp(const char *ver1, const char *ver2)
return result;
}
-static int idtcm_xfer(struct idtcm *idtcm,
- u8 regaddr,
- u8 *buf,
- u16 count,
- bool write)
+static int idtcm_xfer_read(struct idtcm *idtcm,
+ u8 regaddr,
+ u8 *buf,
+ u16 count)
{
struct i2c_client *client = idtcm->client;
struct i2c_msg msg[2];
int cnt;
- char *fmt = "i2c_transfer failed at %d in %s for %s, at addr: %04X!\n";
+ char *fmt = "i2c_transfer failed at %d in %s, at addr: %04X!\n";
msg[0].addr = client->addr;
msg[0].flags = 0;
@@ -159,7 +158,7 @@ static int idtcm_xfer(struct idtcm *idtcm,
msg[0].buf = &regaddr;
msg[1].addr = client->addr;
- msg[1].flags = write ? 0 : I2C_M_RD;
+ msg[1].flags = I2C_M_RD;
msg[1].len = count;
msg[1].buf = buf;
@@ -170,7 +169,6 @@ static int idtcm_xfer(struct idtcm *idtcm,
fmt,
__LINE__,
__func__,
- write ? "write" : "read",
regaddr);
return cnt;
} else if (cnt != 2) {
@@ -182,6 +180,37 @@ static int idtcm_xfer(struct idtcm *idtcm,
return 0;
}
+static int idtcm_xfer_write(struct idtcm *idtcm,
+ u8 regaddr,
+ u8 *buf,
+ u16 count)
+{
+ struct i2c_client *client = idtcm->client;
+ /* we add 1 byte for device register */
+ u8 msg[IDTCM_MAX_WRITE_COUNT + 1];
+ int cnt;
+ char *fmt = "i2c_master_send failed at %d in %s, at addr: %04X!\n";
+
+ if (count > IDTCM_MAX_WRITE_COUNT)
+ return -EINVAL;
+
+ msg[0] = regaddr;
+ memcpy(&msg[1], buf, count);
+
+ cnt = i2c_master_send(client, msg, count + 1);
+
+ if (cnt < 0) {
+ dev_err(&client->dev,
+ fmt,
+ __LINE__,
+ __func__,
+ regaddr);
+ return cnt;
+ }
+
+ return 0;
+}
+
static int idtcm_page_offset(struct idtcm *idtcm, u8 val)
{
u8 buf[4];
@@ -195,7 +224,7 @@ static int idtcm_page_offset(struct idtcm *idtcm, u8 val)
buf[2] = 0x10;
buf[3] = 0x20;
- err = idtcm_xfer(idtcm, PAGE_ADDR, buf, sizeof(buf), 1);
+ err = idtcm_xfer_write(idtcm, PAGE_ADDR, buf, sizeof(buf));
if (err) {
idtcm->page_offset = 0xff;
@@ -223,11 +252,12 @@ static int _idtcm_rdwr(struct idtcm *idtcm,
err = idtcm_page_offset(idtcm, hi);
if (err)
- goto out;
+ return err;
- err = idtcm_xfer(idtcm, lo, buf, count, write);
-out:
- return err;
+ if (write)
+ return idtcm_xfer_write(idtcm, lo, buf, count);
+
+ return idtcm_xfer_read(idtcm, lo, buf, count);
}
static int idtcm_read(struct idtcm *idtcm,
diff --git a/drivers/ptp/ptp_clockmatrix.h b/drivers/ptp/ptp_clockmatrix.h
index ffae56c5d97f..82840d72364a 100644
--- a/drivers/ptp/ptp_clockmatrix.h
+++ b/drivers/ptp/ptp_clockmatrix.h
@@ -55,6 +55,8 @@
#define PEROUT_ENABLE_OUTPUT_MASK (0xdeadbeef)
+#define IDTCM_MAX_WRITE_COUNT (512)
+
/* Values of DPLL_N.DPLL_MODE.PLL_MODE */
enum pll_mode {
PLL_MODE_MIN = 0,