From: Dong Aisheng <aisheng.dong@nxp.com> To: linux-pwm@vger.kernel.org Cc: u.kleine-koenig@pengutronix.de, shawnguo@kernel.org, kernel@pengutronix.de, festevam@gmail.com, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, dongas86@gmail.com, Dong Aisheng <aisheng.dong@nxp.com> Subject: [PATCH 1/1] pwm: imx-tpm: fix probe crash due to access registers without clock Date: Mon, 4 Mar 2024 18:29:29 +0800 [thread overview] Message-ID: <20240304102929.893542-1-aisheng.dong@nxp.com> (raw) The following commit abf6569d6482 ("pwm: imx-tpm: Make use of devm_pwmchip_alloc() function") introduced an issue that accessing registers without clock which results in the following boot crash on MX7ULP platform. Fixed it by enabling clock properly. Unhandled fault: external abort on non-linefetch (0x1008) at 0xf0978004 [f0978004] *pgd=64009811, *pte=40250653, *ppte=40250453 Internal error: : 1008 [#1] SMP ARM Modules linked in: CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.8.0-rc6-next-20240301 #18 Hardware name: Freescale i.MX7ULP (Device Tree) PC is at pwm_imx_tpm_probe+0x1c/0xd8 LR is at __devm_ioremap_resource+0xf8/0x1dc pc : [<c0629e58>] lr : [<c0562d4c>] psr: 80000053 sp : f0825e10 ip : 00000000 fp : 00000000 r10: c148f8c0 r9 : c41fc338 r8 : c164b000 r7 : 00000000 r6 : c406b400 r5 : c406b410 r4 : f0978000 r3 : 00000005 r2 : 00000000 r1 : a0000053 r0 : f0978000 Flags: Nzcv IRQs on FIQs off Mode SVC_32 ISA ARM Segment none Control: 10c5387d Table: 6000406a DAC: 00000051 ... Call trace: pwm_imx_tpm_probe from platform_probe+0x58/0xb0 platform_probe from really_probe+0xc4/0x2e0 really_probe from __driver_probe_device+0x84/0x19c __driver_probe_device from driver_probe_device+0x2c/0x104 driver_probe_device from __driver_attach+0x90/0x170 __driver_attach from bus_for_each_dev+0x7c/0xd0 bus_for_each_dev from bus_add_driver+0xc4/0x1cc bus_add_driver from driver_register+0x7c/0x114 driver_register from do_one_initcall+0x58/0x270 do_one_initcall from kernel_init_freeable+0x170/0x218 kernel_init_freeable from kernel_init+0x14/0x140 kernel_init from ret_from_fork+0x14/0x20 Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Fixes: abf6569d6482 ("pwm: imx-tpm: Make use of devm_pwmchip_alloc() function") Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com> --- drivers/pwm/pwm-imx-tpm.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/drivers/pwm/pwm-imx-tpm.c b/drivers/pwm/pwm-imx-tpm.c index b04b974c5f32..c50ddbac43c8 100644 --- a/drivers/pwm/pwm-imx-tpm.c +++ b/drivers/pwm/pwm-imx-tpm.c @@ -337,6 +337,7 @@ static int pwm_imx_tpm_probe(struct platform_device *pdev) { struct pwm_chip *chip; struct imx_tpm_pwm_chip *tpm; + struct clk *clk; void __iomem *base; int ret; unsigned int npwm; @@ -346,6 +347,11 @@ static int pwm_imx_tpm_probe(struct platform_device *pdev) if (IS_ERR(base)) return PTR_ERR(base); + clk = devm_clk_get_enabled(&pdev->dev, NULL); + if (IS_ERR(clk)) + return dev_err_probe(&pdev->dev, PTR_ERR(clk), + "failed to get PWM clock\n"); + /* get number of channels */ val = readl(base + PWM_IMX_TPM_PARAM); npwm = FIELD_GET(PWM_IMX_TPM_PARAM_CHAN, val); @@ -358,11 +364,7 @@ static int pwm_imx_tpm_probe(struct platform_device *pdev) platform_set_drvdata(pdev, tpm); tpm->base = base; - - tpm->clk = devm_clk_get_enabled(&pdev->dev, NULL); - if (IS_ERR(tpm->clk)) - return dev_err_probe(&pdev->dev, PTR_ERR(tpm->clk), - "failed to get PWM clock\n"); + tpm->clk = clk; chip->ops = &imx_tpm_pwm_ops; -- 2.37.1
WARNING: multiple messages have this Message-ID (diff)
From: Dong Aisheng <aisheng.dong@nxp.com> To: linux-pwm@vger.kernel.org Cc: u.kleine-koenig@pengutronix.de, shawnguo@kernel.org, kernel@pengutronix.de, festevam@gmail.com, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, dongas86@gmail.com, Dong Aisheng <aisheng.dong@nxp.com> Subject: [PATCH 1/1] pwm: imx-tpm: fix probe crash due to access registers without clock Date: Mon, 4 Mar 2024 18:29:29 +0800 [thread overview] Message-ID: <20240304102929.893542-1-aisheng.dong@nxp.com> (raw) The following commit abf6569d6482 ("pwm: imx-tpm: Make use of devm_pwmchip_alloc() function") introduced an issue that accessing registers without clock which results in the following boot crash on MX7ULP platform. Fixed it by enabling clock properly. Unhandled fault: external abort on non-linefetch (0x1008) at 0xf0978004 [f0978004] *pgd=64009811, *pte=40250653, *ppte=40250453 Internal error: : 1008 [#1] SMP ARM Modules linked in: CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.8.0-rc6-next-20240301 #18 Hardware name: Freescale i.MX7ULP (Device Tree) PC is at pwm_imx_tpm_probe+0x1c/0xd8 LR is at __devm_ioremap_resource+0xf8/0x1dc pc : [<c0629e58>] lr : [<c0562d4c>] psr: 80000053 sp : f0825e10 ip : 00000000 fp : 00000000 r10: c148f8c0 r9 : c41fc338 r8 : c164b000 r7 : 00000000 r6 : c406b400 r5 : c406b410 r4 : f0978000 r3 : 00000005 r2 : 00000000 r1 : a0000053 r0 : f0978000 Flags: Nzcv IRQs on FIQs off Mode SVC_32 ISA ARM Segment none Control: 10c5387d Table: 6000406a DAC: 00000051 ... Call trace: pwm_imx_tpm_probe from platform_probe+0x58/0xb0 platform_probe from really_probe+0xc4/0x2e0 really_probe from __driver_probe_device+0x84/0x19c __driver_probe_device from driver_probe_device+0x2c/0x104 driver_probe_device from __driver_attach+0x90/0x170 __driver_attach from bus_for_each_dev+0x7c/0xd0 bus_for_each_dev from bus_add_driver+0xc4/0x1cc bus_add_driver from driver_register+0x7c/0x114 driver_register from do_one_initcall+0x58/0x270 do_one_initcall from kernel_init_freeable+0x170/0x218 kernel_init_freeable from kernel_init+0x14/0x140 kernel_init from ret_from_fork+0x14/0x20 Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Fixes: abf6569d6482 ("pwm: imx-tpm: Make use of devm_pwmchip_alloc() function") Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com> --- drivers/pwm/pwm-imx-tpm.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/drivers/pwm/pwm-imx-tpm.c b/drivers/pwm/pwm-imx-tpm.c index b04b974c5f32..c50ddbac43c8 100644 --- a/drivers/pwm/pwm-imx-tpm.c +++ b/drivers/pwm/pwm-imx-tpm.c @@ -337,6 +337,7 @@ static int pwm_imx_tpm_probe(struct platform_device *pdev) { struct pwm_chip *chip; struct imx_tpm_pwm_chip *tpm; + struct clk *clk; void __iomem *base; int ret; unsigned int npwm; @@ -346,6 +347,11 @@ static int pwm_imx_tpm_probe(struct platform_device *pdev) if (IS_ERR(base)) return PTR_ERR(base); + clk = devm_clk_get_enabled(&pdev->dev, NULL); + if (IS_ERR(clk)) + return dev_err_probe(&pdev->dev, PTR_ERR(clk), + "failed to get PWM clock\n"); + /* get number of channels */ val = readl(base + PWM_IMX_TPM_PARAM); npwm = FIELD_GET(PWM_IMX_TPM_PARAM_CHAN, val); @@ -358,11 +364,7 @@ static int pwm_imx_tpm_probe(struct platform_device *pdev) platform_set_drvdata(pdev, tpm); tpm->base = base; - - tpm->clk = devm_clk_get_enabled(&pdev->dev, NULL); - if (IS_ERR(tpm->clk)) - return dev_err_probe(&pdev->dev, PTR_ERR(tpm->clk), - "failed to get PWM clock\n"); + tpm->clk = clk; chip->ops = &imx_tpm_pwm_ops; -- 2.37.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2024-03-04 10:21 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-03-04 10:29 Dong Aisheng [this message] 2024-03-04 10:29 ` [PATCH 1/1] pwm: imx-tpm: fix probe crash due to access registers without clock Dong Aisheng 2024-03-04 10:48 ` Uwe Kleine-König 2024-03-04 10:48 ` Uwe Kleine-König
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20240304102929.893542-1-aisheng.dong@nxp.com \ --to=aisheng.dong@nxp.com \ --cc=dongas86@gmail.com \ --cc=festevam@gmail.com \ --cc=imx@lists.linux.dev \ --cc=kernel@pengutronix.de \ --cc=linux-arm-kernel@lists.infradead.org \ --cc=linux-pwm@vger.kernel.org \ --cc=shawnguo@kernel.org \ --cc=u.kleine-koenig@pengutronix.de \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.