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authorBryan O'Donoghue <pure.logic@nexus-software.ie>2019-06-26 13:27:29 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-06-26 15:26:46 +0300
commit0493c4792b4eb260441e57f52cc11a9ded48b5a7 (patch)
treecf595ad4ad59502cfb41a9fe8cb864e0034d9913 /drivers/nvmem
parentc03bb448f04f8195f04fe6fb3b0fb4699b311ece (diff)
downloadlinux-0493c4792b4eb260441e57f52cc11a9ded48b5a7.tar.xz
nvmem: imx-ocotp: Ensure WAIT bits are preserved when setting timing
The i.MX6 and i.MX8 both have a bit-field spanning bits 27:22 called the WAIT field. The WAIT field according to the documentation for both parts "specifies time interval between auto read and write access in one time program. It is given in number of ipg_clk periods." This patch ensures that the relevant field is read and written back to the timing register. Fixes: 0642bac7da42 ("nvmem: imx-ocotp: add write support") Signed-off-by: Bryan O'Donoghue <pure.logic@nexus-software.ie> Reviewed-by: Leonard Crestez <leonard.crestez@nxp.com> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/nvmem')
-rw-r--r--drivers/nvmem/imx-ocotp.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/nvmem/imx-ocotp.c b/drivers/nvmem/imx-ocotp.c
index 14c2bff2cd96..f4e117bbf2c3 100644
--- a/drivers/nvmem/imx-ocotp.c
+++ b/drivers/nvmem/imx-ocotp.c
@@ -183,7 +183,8 @@ static void imx_ocotp_set_imx6_timing(struct ocotp_priv *priv)
strobe_prog = clk_rate / (1000000000 / 10000) + 2 * (DEF_RELAX + 1) - 1;
strobe_read = clk_rate / (1000000000 / 40) + 2 * (DEF_RELAX + 1) - 1;
- timing = strobe_prog & 0x00000FFF;
+ timing = readl(priv->base + IMX_OCOTP_ADDR_TIMING) & 0x0FC00000;
+ timing |= strobe_prog & 0x00000FFF;
timing |= (relax << 12) & 0x0000F000;
timing |= (strobe_read << 16) & 0x003F0000;