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nvmem: imx-ocotp: Move i.MX6 write clock setup to dedicated function 

The i.MX7S/D has a different set of timing requirements, as a pre-cursor to
adding the i.MX7 timing parameters, move the i.MX6 stuff to a dedicated
function.

Fixes: 0642bac7da ("nvmem: imx-ocotp: add write support")

Signed-off-by: Bryan O'Donoghue <pure.logic@nexus-software.ie>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Bryan O'Donoghue 2017-10-24 10:54:30 +01:00 committed by Greg Kroah-Hartman
parent ffd9115f65
commit b50cb68f16
1 changed files with 30 additions and 23 deletions
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53
drivers/nvmem/imx-ocotp.c
View File

@ -168,33 +168,11 @@ read_end:
return ret;
}
static int imx_ocotp_write(void *context, unsigned int offset, void *val,
size_t bytes)
static void imx_ocotp_set_imx6_timing(struct ocotp_priv *priv)
{
struct ocotp_priv *priv = context;
u32 *buf = val;
int ret;
unsigned long clk_rate = 0;
unsigned long strobe_read, relax, strobe_prog;
u32 timing = 0;
u32 ctrl;
u8 waddr;
u8 word = 0;
/* allow only writing one complete OTP word at a time */
if ((bytes != priv->config->word_size) ||
(offset % priv->config->word_size))
return -EINVAL;
mutex_lock(&ocotp_mutex);
ret = clk_prepare_enable(priv->clk);
if (ret < 0) {
mutex_unlock(&ocotp_mutex);
dev_err(priv->dev, "failed to prepare/enable ocotp clk\n");
return ret;
}
/* 47.3.1.3.1
* Program HW_OCOTP_TIMING[STROBE_PROG] and HW_OCOTP_TIMING[RELAX]
@ -213,6 +191,35 @@ static int imx_ocotp_write(void *context, unsigned int offset, void *val,
timing |= (strobe_read << 16) & 0x003F0000;
writel(timing, priv->base + IMX_OCOTP_ADDR_TIMING);
}
static int imx_ocotp_write(void *context, unsigned int offset, void *val,
size_t bytes)
{
struct ocotp_priv *priv = context;
u32 *buf = val;
int ret;
u32 ctrl;
u8 waddr;
u8 word = 0;
/* allow only writing one complete OTP word at a time */
if ((bytes != priv->config->word_size) ||
(offset % priv->config->word_size))
return -EINVAL;
mutex_lock(&ocotp_mutex);
ret = clk_prepare_enable(priv->clk);
if (ret < 0) {
mutex_unlock(&ocotp_mutex);
dev_err(priv->dev, "failed to prepare/enable ocotp clk\n");
return ret;
}
/* Setup the write timing values */
imx_ocotp_set_imx6_timing(priv);
/* 47.3.1.3.2
* Check that HW_OCOTP_CTRL[BUSY] and HW_OCOTP_CTRL[ERROR] are clear.