From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1hT782-0006pY-89 for barebox@lists.infradead.org; Tue, 21 May 2019 15:56:40 +0000 From: Ahmad Fatoum Date: Tue, 21 May 2019 17:56:21 +0200 Message-Id: <20190521155626.9906-1-a.fatoum@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 v2 0/5] clk: imx6: work around LDB hang caused by ERR009219 To: barebox@lists.infradead.org Cc: pza@pengutronix.de Short version: barebox always reparents the ldb_di[01] clocks to pll5_video_div. Due to a hardware erratum, this can trigger a glitch that causes LDB lock up. Thus: 1) remove the automatic reparenting, like the kernel now does and mark the affected clocks read only, so assigned-clock-parents can't affect them 2) parse assigned-clock-parents in the clk-imx6 code as well, but there use a convoluted non-glitchy work around to apply them Long version available alongside v1 here: https://www.spinics.net/lists/u-boot-v2/msg37658.html; and in the commit messages of the patches. Changes since v2: - reordered/squashed commits after discussion with Sascha and Phillip - removed superfluous comment - add MUX_READ_ONLY at the correct place in the MUX_READ_ONLY arguments Except for the last two, the total diff, is exactly the same as v1's. Ahmad Fatoum (2): clk: imx6: remove quirky clk_set_parent(LDB_diN_sel, pll5_video_div) clk: imx6: define an enum for ldb mux inputs Fabio Estevam (1): clk: imx6: Fix procedure to switch the parent of LDB_DI_CLK Philipp Zabel (2): clk: imx6: Make the LDB_DI0 and LDB_DI1 clocks read-only clk: imx6: Mask mmdc_ch1 handshake for periph2_sel and mmdc_ch1_axi_podf drivers/clk/imx/clk-imx6.c | 320 +++++++++++++++++++++++++++++++++++-- drivers/clk/imx/clk.h | 8 + 2 files changed, 312 insertions(+), 16 deletions(-) -- 2.20.1 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox