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[86.49.107.50]) by smtp.gmail.com with ESMTPSA id n7-v6sm29813455wri.27.2018.06.04.10.59.13 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 04 Jun 2018 10:59:13 -0700 (PDT) From: Marek Vasut X-Google-Original-From: Marek Vasut To: linux-arm-kernel@lists.infradead.org Subject: [PATCH V3] ARM: shmobile: Rework the PMIC IRQ line quirk Date: Mon, 4 Jun 2018 19:59:11 +0200 Message-Id: <20180604175911.799-1-marek.vasut+renesas@gmail.com> X-Mailer: git-send-email 2.16.2 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180604_135935_813160_0ED42694 X-CRM114-Status: GOOD ( 26.90 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Geert Uytterhoeven , Kuninori Morimoto , linux-renesas-soc@vger.kernel.org, Wolfram Sang , Simon Horman , Marek Vasut MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Rather than hard-coding the quirk topology, which stopped scaling, parse the information from DT. The code looks for all compatible PMICs -- da9036 and da9210 -- and checks if their IRQ line is tied to the same pin. If so, the code sends a matching sequence to the PMIC to deassert the IRQ. Signed-off-by: Marek Vasut Cc: Geert Uytterhoeven Cc: Kuninori Morimoto Cc: Simon Horman Cc: Wolfram Sang Cc: linux-renesas-soc@vger.kernel.org Acked-by: Wolfram Sang Tested-by: Geert Uytterhoeven --- V2: - Replace the DT shared IRQ check loop with memcmp() - Send the I2C message to deassert the IRQ line to all PMICs in the list with shared IRQ line instead of just one - Add comment that this works only in case all the PMICs are on the same I2C bus V3: - Drop the addr = 0x00 init - Drop reinit of argsa in rcar_gen2_regulator_quirk --- arch/arm/mach-shmobile/regulator-quirk-rcar-gen2.c | 114 ++++++++++++++++----- 1 file changed, 90 insertions(+), 24 deletions(-) diff --git a/arch/arm/mach-shmobile/regulator-quirk-rcar-gen2.c b/arch/arm/mach-shmobile/regulator-quirk-rcar-gen2.c index 93f628acfd94..b919073aa27e 100644 --- a/arch/arm/mach-shmobile/regulator-quirk-rcar-gen2.c +++ b/arch/arm/mach-shmobile/regulator-quirk-rcar-gen2.c @@ -31,8 +31,10 @@ #include #include #include +#include #include #include +#include #include @@ -44,34 +46,45 @@ /* start of DA9210 System Control and Event Registers */ #define DA9210_REG_MASK_A 0x54 +struct regulator_quirk { + struct list_head list; + const struct of_device_id *id; + struct of_phandle_args irq_args; + struct i2c_msg i2c_msg; + bool shared; /* IRQ line is shared */ +}; + +static LIST_HEAD(quirk_list); static void __iomem *irqc; /* first byte sets the memory pointer, following are consecutive reg values */ static u8 da9063_irq_clr[] = { DA9063_REG_IRQ_MASK_A, 0xff, 0xff, 0xff, 0xff }; static u8 da9210_irq_clr[] = { DA9210_REG_MASK_A, 0xff, 0xff }; -static struct i2c_msg da9xxx_msgs[3] = { - { - .addr = 0x58, - .len = ARRAY_SIZE(da9063_irq_clr), - .buf = da9063_irq_clr, - }, { - .addr = 0x68, - .len = ARRAY_SIZE(da9210_irq_clr), - .buf = da9210_irq_clr, - }, { - .addr = 0x70, - .len = ARRAY_SIZE(da9210_irq_clr), - .buf = da9210_irq_clr, - }, +static struct i2c_msg da9063_msgs = { + .len = ARRAY_SIZE(da9063_irq_clr), + .buf = da9063_irq_clr, +}; + +static struct i2c_msg da9210_msgs = { + .len = ARRAY_SIZE(da9210_irq_clr), + .buf = da9210_irq_clr, +}; + +static const struct of_device_id rcar_gen2_quirk_match[] = { + { .compatible = "dlg,da9063", .data = &da9063_msgs }, + { .compatible = "dlg,da9210", .data = &da9210_msgs }, + {}, }; static int regulator_quirk_notify(struct notifier_block *nb, unsigned long action, void *data) { + struct regulator_quirk *pos, *tmp; struct device *dev = data; struct i2c_client *client; static bool done; + int ret; u32 mon; if (done) @@ -88,17 +101,20 @@ static int regulator_quirk_notify(struct notifier_block *nb, client = to_i2c_client(dev); dev_dbg(dev, "Detected %s\n", client->name); - if ((client->addr == 0x58 && !strcmp(client->name, "da9063")) || - (client->addr == 0x68 && !strcmp(client->name, "da9210")) || - (client->addr == 0x70 && !strcmp(client->name, "da9210"))) { - int ret, len; + /* + * Send message to all PMICs that share an IRQ line to deassert it. + * + * WARNING: This works only if all the PMICs are on the same I2C bus. + */ + list_for_each_entry(pos, &quirk_list, list) { + if (!pos->shared) + continue; - /* There are two DA9210 on Stout, one on the other boards. */ - len = of_machine_is_compatible("renesas,stout") ? 3 : 2; + dev_info(&client->dev, "clearing %s@0x%02x interrupts\n", + pos->id->compatible, pos->i2c_msg.addr); - dev_info(&client->dev, "clearing da9063/da9210 interrupts\n"); - ret = i2c_transfer(client->adapter, da9xxx_msgs, len); - if (ret != len) + ret = i2c_transfer(client->adapter, &pos->i2c_msg, 1); + if (ret != 1) dev_err(&client->dev, "i2c error %d\n", ret); } @@ -111,6 +127,11 @@ static int regulator_quirk_notify(struct notifier_block *nb, remove: dev_info(dev, "IRQ2 is not asserted, removing quirk\n"); + list_for_each_entry_safe(pos, tmp, &quirk_list, list) { + list_del(&pos->list); + kfree(pos); + } + done = true; iounmap(irqc); return 0; @@ -122,7 +143,13 @@ static struct notifier_block regulator_quirk_nb = { static int __init rcar_gen2_regulator_quirk(void) { - u32 mon; + struct device_node *np; + const struct of_device_id *id; + struct regulator_quirk *quirk; + struct regulator_quirk *pos; + struct of_phandle_args *argsa, *argsb; + u32 mon, addr; + int ret; if (!of_machine_is_compatible("renesas,koelsch") && !of_machine_is_compatible("renesas,lager") && @@ -130,6 +157,45 @@ static int __init rcar_gen2_regulator_quirk(void) !of_machine_is_compatible("renesas,gose")) return -ENODEV; + for_each_matching_node_and_match(np, rcar_gen2_quirk_match, &id) { + if (!np || !of_device_is_available(np)) + break; + + quirk = kzalloc(sizeof(*quirk), GFP_KERNEL); + + argsa = &quirk->irq_args; + memcpy(&quirk->i2c_msg, id->data, sizeof(quirk->i2c_msg)); + + ret = of_property_read_u32(np, "reg", &addr); + if (ret) + return ret; + + quirk->id = id; + quirk->i2c_msg.addr = addr; + quirk->shared = false; + + ret = of_irq_parse_one(np, 0, &quirk->irq_args); + if (ret) + return ret; + + list_for_each_entry(pos, &quirk_list, list) { + argsb = &pos->irq_args; + + if (argsa->args_count != argsb->args_count) + continue; + + ret = memcmp(argsa->args, argsb->args, + argsa->args_count * + sizeof(argsa->args[0])); + if (!ret) { + pos->shared = true; + quirk->shared = true; + } + } + + list_add_tail(&quirk->list, &quirk_list); + } + irqc = ioremap(IRQC_BASE, PAGE_SIZE); if (!irqc) return -ENOMEM;