From mboxrd@z Thu Jan 1 00:00:00 1970 From: Quan Nguyen Date: Mon, 24 May 2021 17:20:01 +0700 Subject: [PATCH v3 5/7] i2c: aspeed: Add aspeed_set_slave_busy() In-Reply-To: References: <20210519074934.20712-1-quan@os.amperecomputing.com> <20210519074934.20712-6-quan@os.amperecomputing.com> Message-ID: <1648966e-3e45-9661-c5dc-5ac2f40e2581@os.amperecomputing.com> List-Id: To: linux-aspeed@lists.ozlabs.org MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit On 24/05/2021 17:06, Ryan Chen wrote: >> -----Original Message----- >> From: openbmc >> On Behalf >> Of Quan Nguyen >> Sent: Wednesday, May 19, 2021 3:50 PM >> To: Corey Minyard ; Rob Herring ; >> Joel Stanley ; Andrew Jeffery ; Brendan >> Higgins ; Benjamin Herrenschmidt >> ; Wolfram Sang ; Philipp Zabel >> ; openipmi-developer at lists.sourceforge.net; >> devicetree at vger.kernel.org; linux-arm-kernel at lists.infradead.org; >> linux-aspeed at lists.ozlabs.org; linux-kernel at vger.kernel.org; >> linux-i2c at vger.kernel.org >> Cc: Open Source Submission ; Thang Q . >> Nguyen ; Phong Vo >> ; openbmc at lists.ozlabs.org >> Subject: [PATCH v3 5/7] i2c: aspeed: Add aspeed_set_slave_busy() >> >> Slave i2c device on AST2500 received a lot of slave irq while it is busy >> processing the response. To handle this case, adds and exports >> aspeed_set_slave_busy() for controller to temporary stop slave irq while slave >> is handling the response, and re-enable them again when the response is ready. >> >> Signed-off-by: Quan Nguyen >> --- >> v3: >> + First introduce in v3 [Quan] >> >> drivers/i2c/busses/i2c-aspeed.c | 20 ++++++++++++++++++++ >> 1 file changed, 20 insertions(+) >> >> diff --git a/drivers/i2c/busses/i2c-aspeed.c b/drivers/i2c/busses/i2c-aspeed.c >> index b2e9c8f0ddf7..9926d04831a2 100644 >> --- a/drivers/i2c/busses/i2c-aspeed.c >> +++ b/drivers/i2c/busses/i2c-aspeed.c >> @@ -944,6 +944,26 @@ static int aspeed_i2c_init(struct aspeed_i2c_bus >> *bus, >> return 0; >> } >> >> +#if IS_ENABLED(CONFIG_I2C_SLAVE) >> +void aspeed_set_slave_busy(struct i2c_adapter *adap, bool busy) { >> + struct aspeed_i2c_bus *bus = i2c_get_adapdata(adap); >> + unsigned long current_mask, flags; >> + >> + spin_lock_irqsave(&bus->lock, flags); >> + >> + current_mask = readl(bus->base + ASPEED_I2C_INTR_CTRL_REG); > Hello > Where the bus->base to be remap? > Hi Ryan, In "[PATCH v3 6/7] ipmi: ssif_bmc: Add Aspeed SSIF BMC driver", the ->priv is retrieved by calling i2c_get_adapdata(client->adapter). And in aspeed_set_ssif_bmc_status(), call the exported aspeed_set_slave_busy() using ->priv pointer as code below. +extern void aspeed_set_slave_busy(struct i2c_adapter *adap, bool busy); +static void aspeed_set_ssif_bmc_status(struct ssif_bmc_ctx *ssif_bmc, unsigned int status) +{ + if (status & SSIF_BMC_BUSY) + aspeed_set_slave_busy((struct i2c_adapter *)ssif_bmc->priv, true); + else if (status & SSIF_BMC_READY) + aspeed_set_slave_busy((struct i2c_adapter *)ssif_bmc->priv, false); +} + +static int ssif_bmc_probe(struct i2c_client *client, const struct i2c_device_id *id) +{ + struct ssif_bmc_ctx *ssif_bmc; + + ssif_bmc = ssif_bmc_alloc(client, 0); + if (IS_ERR(ssif_bmc)) + return PTR_ERR(ssif_bmc); + + ssif_bmc->priv = i2c_get_adapdata(client->adapter); + ssif_bmc->set_ssif_bmc_status = aspeed_set_ssif_bmc_status; + + return 0; +} - Quan