From a4931dcab1dedf67caa231ff2c9b0a6bb40139af Mon Sep 17 00:00:00 2001 From: Lee Jones Date: Thu, 20 May 2021 20:00:53 +0100 Subject: i2c: altera: Fix formatting issue in struct and demote unworthy kernel-doc headers Fixes the following W=1 kernel build warning(s): drivers/i2c/busses/i2c-altera.c:74: warning: cannot understand function prototype: 'struct altr_i2c_dev ' drivers/i2c/busses/i2c-altera.c:180: warning: Function parameter or member 'idev' not described in 'altr_i2c_transfer' drivers/i2c/busses/i2c-altera.c:180: warning: Function parameter or member 'data' not described in 'altr_i2c_transfer' drivers/i2c/busses/i2c-altera.c:193: warning: Function parameter or member 'idev' not described in 'altr_i2c_empty_rx_fifo' drivers/i2c/busses/i2c-altera.c:209: warning: Function parameter or member 'idev' not described in 'altr_i2c_fill_tx_fifo' Signed-off-by: Lee Jones Signed-off-by: Wolfram Sang --- drivers/i2c/busses/i2c-altera.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/drivers/i2c/busses/i2c-altera.c b/drivers/i2c/busses/i2c-altera.c index 7d62cbda6e06..354cf7e45c4a 100644 --- a/drivers/i2c/busses/i2c-altera.c +++ b/drivers/i2c/busses/i2c-altera.c @@ -55,7 +55,7 @@ #define ALTR_I2C_XFER_TIMEOUT (msecs_to_jiffies(250)) /** - * altr_i2c_dev - I2C device context + * struct altr_i2c_dev - I2C device context * @base: pointer to register struct * @msg: pointer to current message * @msg_len: number of bytes transferred in msg @@ -172,7 +172,7 @@ static void altr_i2c_init(struct altr_i2c_dev *idev) altr_i2c_int_enable(idev, ALTR_I2C_ALL_IRQ, false); } -/** +/* * altr_i2c_transfer - On the last byte to be transmitted, send * a Stop bit on the last byte. */ @@ -185,7 +185,7 @@ static void altr_i2c_transfer(struct altr_i2c_dev *idev, u32 data) writel(data, idev->base + ALTR_I2C_TFR_CMD); } -/** +/* * altr_i2c_empty_rx_fifo - Fetch data from RX FIFO until end of * transfer. Send a Stop bit on the last byte. */ @@ -201,9 +201,8 @@ static void altr_i2c_empty_rx_fifo(struct altr_i2c_dev *idev) } } -/** +/* * altr_i2c_fill_tx_fifo - Fill TX FIFO from current message buffer. - * @return: Number of bytes left to transfer. */ static int altr_i2c_fill_tx_fifo(struct altr_i2c_dev *idev) { -- cgit v1.2.3 From de2646f34a5bdfa04fb079bfaaada992b87c6a55 Mon Sep 17 00:00:00 2001 From: Lee Jones Date: Thu, 20 May 2021 20:01:04 +0100 Subject: i2c: tegra-bpmp: Demote kernel-doc abuses Fixes the following W=1 kernel build warning(s): drivers/i2c/busses/i2c-tegra-bpmp.c:86: warning: Function parameter or member 'i2c' not described in 'tegra_bpmp_serialize_i2c_msg' drivers/i2c/busses/i2c-tegra-bpmp.c:86: warning: Function parameter or member 'request' not described in 'tegra_bpmp_serialize_i2c_msg' drivers/i2c/busses/i2c-tegra-bpmp.c:86: warning: Function parameter or member 'msgs' not described in 'tegra_bpmp_serialize_i2c_msg' drivers/i2c/busses/i2c-tegra-bpmp.c:86: warning: Function parameter or member 'num' not described in 'tegra_bpmp_serialize_i2c_msg' drivers/i2c/busses/i2c-tegra-bpmp.c:86: warning: expecting prototype for The serialized I2C format is simply the following(). Prototype was for tegra_bpmp_serialize_i2c_msg() instead drivers/i2c/busses/i2c-tegra-bpmp.c:130: warning: Function parameter or member 'i2c' not described in 'tegra_bpmp_i2c_deserialize' drivers/i2c/busses/i2c-tegra-bpmp.c:130: warning: Function parameter or member 'response' not described in 'tegra_bpmp_i2c_deserialize' drivers/i2c/busses/i2c-tegra-bpmp.c:130: warning: Function parameter or member 'msgs' not described in 'tegra_bpmp_i2c_deserialize' drivers/i2c/busses/i2c-tegra-bpmp.c:130: warning: Function parameter or member 'num' not described in 'tegra_bpmp_i2c_deserialize' drivers/i2c/busses/i2c-tegra-bpmp.c:130: warning: expecting prototype for The data in the BPMP(). Prototype was for tegra_bpmp_i2c_deserialize() instead Signed-off-by: Lee Jones Acked-by: Thierry Reding Signed-off-by: Wolfram Sang --- drivers/i2c/busses/i2c-tegra-bpmp.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/i2c/busses/i2c-tegra-bpmp.c b/drivers/i2c/busses/i2c-tegra-bpmp.c index 3680d608698b..ec0c7cad4240 100644 --- a/drivers/i2c/busses/i2c-tegra-bpmp.c +++ b/drivers/i2c/busses/i2c-tegra-bpmp.c @@ -65,7 +65,7 @@ static void tegra_bpmp_xlate_flags(u16 flags, u16 *out) *out |= SERIALI2C_RECV_LEN; } -/** +/* * The serialized I2C format is simply the following: * [addr little-endian][flags little-endian][len little-endian][data if write] * [addr little-endian][flags little-endian][len little-endian][data if write] @@ -109,7 +109,7 @@ static void tegra_bpmp_serialize_i2c_msg(struct tegra_bpmp_i2c *i2c, request->xfer.data_size = pos; } -/** +/* * The data in the BPMP -> CPU direction is composed of sequential blocks for * those messages that have I2C_M_RD. So, for example, if you have: * -- cgit v1.2.3 From 9f78c607600ce4f2a952560de26534715236f612 Mon Sep 17 00:00:00 2001 From: Roja Rani Yarubandi Date: Tue, 25 May 2021 18:40:50 +0530 Subject: i2c: qcom-geni: Add shutdown callback for i2c If the hardware is still accessing memory after SMMU translation is disabled (as part of smmu shutdown callback), then the IOVAs (I/O virtual address) which it was using will go on the bus as the physical addresses which will result in unknown crashes like NoC/interconnect errors. So, implement shutdown callback for i2c driver to suspend the bus during system "reboot" or "shutdown". Fixes: 37692de5d523 ("i2c: i2c-qcom-geni: Add bus driver for the Qualcomm GENI I2C controller") Signed-off-by: Roja Rani Yarubandi Reviewed-by: Stephen Boyd Signed-off-by: Wolfram Sang --- drivers/i2c/busses/i2c-qcom-geni.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/i2c/busses/i2c-qcom-geni.c b/drivers/i2c/busses/i2c-qcom-geni.c index 07b710a774df..8f67ebe6096c 100644 --- a/drivers/i2c/busses/i2c-qcom-geni.c +++ b/drivers/i2c/busses/i2c-qcom-geni.c @@ -650,6 +650,14 @@ static int geni_i2c_remove(struct platform_device *pdev) return 0; } +static void geni_i2c_shutdown(struct platform_device *pdev) +{ + struct geni_i2c_dev *gi2c = platform_get_drvdata(pdev); + + /* Make client i2c transfers start failing */ + i2c_mark_adapter_suspended(&gi2c->adap); +} + static int __maybe_unused geni_i2c_runtime_suspend(struct device *dev) { int ret; @@ -714,6 +722,7 @@ MODULE_DEVICE_TABLE(of, geni_i2c_dt_match); static struct platform_driver geni_i2c_driver = { .probe = geni_i2c_probe, .remove = geni_i2c_remove, + .shutdown = geni_i2c_shutdown, .driver = { .name = "geni_i2c", .pm = &geni_i2c_pm_ops, -- cgit v1.2.3 From 57648e860485de39c800a89f849fdd03c2d31d15 Mon Sep 17 00:00:00 2001 From: Roja Rani Yarubandi Date: Tue, 25 May 2021 18:40:51 +0530 Subject: i2c: qcom-geni: Suspend and resume the bus during SYSTEM_SLEEP_PM ops Mark bus as suspended during system suspend to block the future transfers. Implement geni_i2c_resume_noirq() to resume the bus. Fixes: 37692de5d523 ("i2c: i2c-qcom-geni: Add bus driver for the Qualcomm GENI I2C controller") Signed-off-by: Roja Rani Yarubandi Reviewed-by: Stephen Boyd Signed-off-by: Wolfram Sang --- drivers/i2c/busses/i2c-qcom-geni.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/i2c/busses/i2c-qcom-geni.c b/drivers/i2c/busses/i2c-qcom-geni.c index 8f67ebe6096c..6d635a7c104c 100644 --- a/drivers/i2c/busses/i2c-qcom-geni.c +++ b/drivers/i2c/busses/i2c-qcom-geni.c @@ -698,6 +698,8 @@ static int __maybe_unused geni_i2c_suspend_noirq(struct device *dev) { struct geni_i2c_dev *gi2c = dev_get_drvdata(dev); + i2c_mark_adapter_suspended(&gi2c->adap); + if (!gi2c->suspended) { geni_i2c_runtime_suspend(dev); pm_runtime_disable(dev); @@ -707,8 +709,16 @@ static int __maybe_unused geni_i2c_suspend_noirq(struct device *dev) return 0; } +static int __maybe_unused geni_i2c_resume_noirq(struct device *dev) +{ + struct geni_i2c_dev *gi2c = dev_get_drvdata(dev); + + i2c_mark_adapter_resumed(&gi2c->adap); + return 0; +} + static const struct dev_pm_ops geni_i2c_pm_ops = { - SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(geni_i2c_suspend_noirq, NULL) + SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(geni_i2c_suspend_noirq, geni_i2c_resume_noirq) SET_RUNTIME_PM_OPS(geni_i2c_runtime_suspend, geni_i2c_runtime_resume, NULL) }; -- cgit v1.2.3