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[72.189.84.142]) by smtp.gmail.com with ESMTPSA id r63sm743292ywg.36.2019.10.09.10.15.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 09 Oct 2019 10:15:31 -0700 (PDT) From: William Breathitt Gray To: linus.walleij@linaro.org, bgolaszewski@baylibre.com, akpm@linux-foundation.org Subject: [PATCH v18 13/14] gpio: max3191x: Utilize the for_each_set_clump8 macro Date: Wed, 9 Oct 2019 13:14:49 -0400 Message-Id: X-Mailer: git-send-email 2.23.0 In-Reply-To: References: MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191009_101533_430299_9793E142 X-CRM114-Status: GOOD ( 11.60 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:c42 listed in] [list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (vilhelm.gray[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arch@vger.kernel.org, Mathias Duckeck , preid@electromag.com.au, yamada.masahiro@socionext.com, linux-pm@vger.kernel.org, linux@rasmusvillemoes.dk, linux-kernel@vger.kernel.org, William Breathitt Gray , linux-gpio@vger.kernel.org, lukas@wunner.de, geert@linux-m68k.org, andriy.shevchenko@linux.intel.com, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Replace verbose implementation in get_multiple callback with for_each_set_clump8 macro to simplify code and improve clarity. Cc: Mathias Duckeck Cc: Lukas Wunner Signed-off-by: William Breathitt Gray --- drivers/gpio/gpio-max3191x.c | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-) diff --git a/drivers/gpio/gpio-max3191x.c b/drivers/gpio/gpio-max3191x.c index 4b4b2ceb82fc..0242c6187bf5 100644 --- a/drivers/gpio/gpio-max3191x.c +++ b/drivers/gpio/gpio-max3191x.c @@ -31,6 +31,7 @@ */ #include +#include #include #include #include @@ -232,16 +233,20 @@ static int max3191x_get_multiple(struct gpio_chip *gpio, unsigned long *mask, unsigned long *bits) { struct max3191x_chip *max3191x = gpiochip_get_data(gpio); - int ret, bit = 0, wordlen = max3191x_wordlen(max3191x); + const unsigned int wordlen = max3191x_wordlen(max3191x); + int ret; + unsigned long bit; + unsigned long gpio_mask; + unsigned long in; mutex_lock(&max3191x->lock); ret = max3191x_readout_locked(max3191x); if (ret) goto out_unlock; - while ((bit = find_next_bit(mask, gpio->ngpio, bit)) != gpio->ngpio) { + bitmap_zero(bits, gpio->ngpio); + for_each_set_clump8(bit, gpio_mask, mask, gpio->ngpio) { unsigned int chipnum = bit / MAX3191X_NGPIO; - unsigned long in, shift, index; if (max3191x_chip_is_faulting(max3191x, chipnum)) { ret = -EIO; @@ -249,12 +254,8 @@ static int max3191x_get_multiple(struct gpio_chip *gpio, unsigned long *mask, } in = ((u8 *)max3191x->xfer.rx_buf)[chipnum * wordlen]; - shift = round_down(bit % BITS_PER_LONG, MAX3191X_NGPIO); - index = bit / BITS_PER_LONG; - bits[index] &= ~(mask[index] & (0xff << shift)); - bits[index] |= mask[index] & (in << shift); /* copy bits */ - - bit = (chipnum + 1) * MAX3191X_NGPIO; /* go to next chip */ + in &= gpio_mask; + bitmap_set_value8(bits, in, bit); } out_unlock: