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[92.17.247.99]) by smtp.gmail.com with ESMTPSA id q127sm15007708wmd.13.2016.04.24.12.28.34 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Sun, 24 Apr 2016 12:28:35 -0700 (PDT) From: Srinivas Kandagatla To: Greg Kroah-Hartman Subject: [PATCH 03/12] eeprom: at25: remove nvmem regmap dependency Date: Sun, 24 Apr 2016 20:28:07 +0100 Message-Id: <1461526096-29584-4-git-send-email-srinivas.kandagatla@linaro.org> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1461526096-29584-1-git-send-email-srinivas.kandagatla@linaro.org> References: <1461526096-29584-1-git-send-email-srinivas.kandagatla@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160424_122858_506792_68C938E7 X-CRM114-Status: GOOD ( 19.12 ) X-Spam-Score: -2.0 (--) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: andrew@lunn.ch, Heiko Stuebner , Wolfram Sang , Joachim Eastwood , linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, Chen-Yu Tsai , Mark Brown , Srinivas Kandagatla , linux-i2c@vger.kernel.org, Matthias Brugger , linux-mediatek@lists.infradead.org, Maxime Ripard , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-5.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_MED,RP_MATCHES_RCVD,T_DKIM_INVALID,UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch moves to nvmem support in the driver to use callback instead of regmap. Signed-off-by: Srinivas Kandagatla --- drivers/misc/eeprom/Kconfig | 1 - drivers/misc/eeprom/at25.c | 89 ++++++++++----------------------------------- 2 files changed, 19 insertions(+), 71 deletions(-) diff --git a/drivers/misc/eeprom/Kconfig b/drivers/misc/eeprom/Kconfig index 2d70464..c4e41c2 100644 --- a/drivers/misc/eeprom/Kconfig +++ b/drivers/misc/eeprom/Kconfig @@ -31,7 +31,6 @@ config EEPROM_AT24 config EEPROM_AT25 tristate "SPI EEPROMs from most vendors" depends on SPI && SYSFS - select REGMAP select NVMEM help Enable this driver to get read/write support to most SPI EEPROMs, diff --git a/drivers/misc/eeprom/at25.c b/drivers/misc/eeprom/at25.c index fa36a6e..a2858b3 100644 --- a/drivers/misc/eeprom/at25.c +++ b/drivers/misc/eeprom/at25.c @@ -17,7 +17,6 @@ #include #include -#include #include #include #include @@ -34,7 +33,6 @@ struct at25_data { struct mutex lock; struct spi_eeprom chip; unsigned addrlen; - struct regmap_config regmap_config; struct nvmem_config nvmem_config; struct nvmem_device *nvmem; }; @@ -65,14 +63,11 @@ struct at25_data { #define io_limit PAGE_SIZE /* bytes */ -static ssize_t -at25_ee_read( - struct at25_data *at25, - char *buf, - unsigned offset, - size_t count -) +static int at25_ee_read(void *priv, unsigned int offset, + void *val, size_t count) { + struct at25_data *at25 = priv; + char *buf = val; u8 command[EE_MAXADDRLEN + 1]; u8 *cp; ssize_t status; @@ -81,11 +76,11 @@ at25_ee_read( u8 instr; if (unlikely(offset >= at25->chip.byte_len)) - return 0; + return -EINVAL; if ((offset + count) > at25->chip.byte_len) count = at25->chip.byte_len - offset; if (unlikely(!count)) - return count; + return -EINVAL; cp = command; @@ -131,28 +126,14 @@ at25_ee_read( count, offset, (int) status); mutex_unlock(&at25->lock); - return status ? status : count; + return status; } -static int at25_regmap_read(void *context, const void *reg, size_t reg_size, - void *val, size_t val_size) +static int at25_ee_write(void *priv, unsigned int off, void *val, size_t count) { - struct at25_data *at25 = context; - off_t offset = *(u32 *)reg; - int err; - - err = at25_ee_read(at25, val, offset, val_size); - if (err) - return err; - return 0; -} - -static ssize_t -at25_ee_write(struct at25_data *at25, const char *buf, loff_t off, - size_t count) -{ - ssize_t status = 0; - unsigned written = 0; + struct at25_data *at25 = priv; + const char *buf = val; + int status = 0; unsigned buf_size; u8 *bounce; @@ -161,7 +142,7 @@ at25_ee_write(struct at25_data *at25, const char *buf, loff_t off, if ((off + count) > at25->chip.byte_len) count = at25->chip.byte_len - off; if (unlikely(!count)) - return count; + return -EINVAL; /* Temp buffer starts with command and address */ buf_size = at25->chip.page_size; @@ -256,40 +237,15 @@ at25_ee_write(struct at25_data *at25, const char *buf, loff_t off, off += segment; buf += segment; count -= segment; - written += segment; } while (count > 0); mutex_unlock(&at25->lock); kfree(bounce); - return written ? written : status; + return status; } -static int at25_regmap_write(void *context, const void *data, size_t count) -{ - struct at25_data *at25 = context; - const char *buf; - u32 offset; - size_t len; - int err; - - memcpy(&offset, data, sizeof(offset)); - buf = (const char *)data + sizeof(offset); - len = count - sizeof(offset); - - err = at25_ee_write(at25, buf, offset, len); - if (err) - return err; - return 0; -} - -static const struct regmap_bus at25_regmap_bus = { - .read = at25_regmap_read, - .write = at25_regmap_write, - .reg_format_endian_default = REGMAP_ENDIAN_NATIVE, -}; - /*-------------------------------------------------------------------------*/ static int at25_fw_to_chip(struct device *dev, struct spi_eeprom *chip) @@ -349,7 +305,6 @@ static int at25_probe(struct spi_device *spi) { struct at25_data *at25 = NULL; struct spi_eeprom chip; - struct regmap *regmap; int err; int sr; int addrlen; @@ -394,18 +349,6 @@ static int at25_probe(struct spi_device *spi) spi_set_drvdata(spi, at25); at25->addrlen = addrlen; - at25->regmap_config.reg_bits = 32; - at25->regmap_config.val_bits = 8; - at25->regmap_config.reg_stride = 1; - at25->regmap_config.max_register = chip.byte_len - 1; - - regmap = devm_regmap_init(&spi->dev, &at25_regmap_bus, at25, - &at25->regmap_config); - if (IS_ERR(regmap)) { - dev_err(&spi->dev, "regmap init failed\n"); - return PTR_ERR(regmap); - } - at25->nvmem_config.name = dev_name(&spi->dev); at25->nvmem_config.dev = &spi->dev; at25->nvmem_config.read_only = chip.flags & EE_READONLY; @@ -413,6 +356,12 @@ static int at25_probe(struct spi_device *spi) at25->nvmem_config.owner = THIS_MODULE; at25->nvmem_config.compat = true; at25->nvmem_config.base_dev = &spi->dev; + at25->nvmem_config.reg_read = at25_ee_read; + at25->nvmem_config.reg_write = at25_ee_write; + at25->nvmem_config.priv = at25; + at25->nvmem_config.stride = 4; + at25->nvmem_config.word_size = 1; + at25->nvmem_config.size = chip.byte_len; at25->nvmem = nvmem_register(&at25->nvmem_config); if (IS_ERR(at25->nvmem))