From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from magratgarlick.emantor.de ([2a01:4f8:c17:c88::2]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jvaP2-0006so-Cu for barebox@lists.infradead.org; Wed, 15 Jul 2020 05:56:26 +0000 From: Rouven Czerwinski Date: Wed, 15 Jul 2020 07:56:06 +0200 Message-Id: <20200715055608.20993-3-r.czerwinski@pengutronix.de> In-Reply-To: <20200715055608.20993-1-r.czerwinski@pengutronix.de> References: <20200715055608.20993-1-r.czerwinski@pengutronix.de> MIME-Version: 1.0 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 3/5] nvmem: ocotp: add new timing function for i.MX7 To: barebox@lists.infradead.org Cc: Rouven Czerwinski Ported from the linux kernel. Signed-off-by: Rouven Czerwinski --- drivers/nvmem/ocotp.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/drivers/nvmem/ocotp.c b/drivers/nvmem/ocotp.c index 3f475e5b1f..1b842ec0ed 100644 --- a/drivers/nvmem/ocotp.c +++ b/drivers/nvmem/ocotp.c @@ -48,6 +48,9 @@ #define OCOTP_READ_CTRL 0x30 #define OCOTP_READ_FUSE_DATA 0x40 +#define DEF_FSOURCE 1001 /* > 1000 ns */ +#define DEF_STROBE_PROG 10000 /* IPG clocks */ + /* OCOTP Registers bits and masks */ #define OCOTP_CTRL_WR_UNLOCK 16 #define OCOTP_CTRL_WR_UNLOCK_KEY 0x3E77 @@ -171,6 +174,27 @@ static int imx6_ocotp_set_timing(struct ocotp_priv *priv) return 0; } +static int imx7_ocotp_set_timing(struct ocotp_priv *priv) +{ + unsigned long clk_rate; + u64 fsource, strobe_prog; + u32 timing; + + clk_rate = clk_get_rate(priv->clk); + + fsource = DIV_ROUND_UP_ULL((u64)clk_rate * DEF_FSOURCE, + NSEC_PER_SEC) + 1; + strobe_prog = DIV_ROUND_CLOSEST_ULL((u64)clk_rate * DEF_STROBE_PROG, + NSEC_PER_SEC) + 1; + + timing = strobe_prog & 0x00000FFF; + timing |= (fsource << 12) & 0x000FF000; + + writel(timing, priv->base + OCOTP_TIMING); + + return 0; +} + static int imx6_ocotp_wait_busy(struct ocotp_priv *priv, u32 flags) { uint64_t start = get_time_ns(); -- 2.27.0 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox