diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2023-05-05 19:07:17 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2023-05-05 19:07:17 -0700 |
commit | a5e219005aeaf52cb10f9999a61c07a140db7097 (patch) | |
tree | 5d574c4472b9ceef372c54315eb28a2a30efef69 | |
parent | c12753d5fa3eab636b5ced91d6a2155173c11527 (diff) | |
parent | 1bd922877a084c1c6c1d0cb1bb9c3700fa0f6c61 (diff) |
Merge tag 'i2c-for-6.4-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull more i2c updates from Wolfram Sang:
"Some more driver bugfixes and a DT binding conversion"
* tag 'i2c-for-6.4-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
dt-bindings: i2c: brcm,kona-i2c: convert to YAML
i2c: gxp: fix build failure without CONFIG_I2C_SLAVE
i2c: imx-lpi2c: avoid taking clk_prepare mutex in PM callbacks
i2c: omap: Fix standard mode false ACK readings
i2c: tegra: Fix PEC support for SMBUS block read
-rw-r--r-- | Documentation/devicetree/bindings/i2c/brcm,kona-i2c.txt | 35 | ||||
-rw-r--r-- | Documentation/devicetree/bindings/i2c/brcm,kona-i2c.yaml | 59 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-gxp.c | 2 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-imx-lpi2c.c | 4 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-omap.c | 2 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-tegra.c | 40 | ||||
-rw-r--r-- | include/linux/i2c.h | 4 |
7 files changed, 91 insertions, 55 deletions
diff --git a/Documentation/devicetree/bindings/i2c/brcm,kona-i2c.txt b/Documentation/devicetree/bindings/i2c/brcm,kona-i2c.txt deleted file mode 100644 index 1b87b741fa8e..000000000000 --- a/Documentation/devicetree/bindings/i2c/brcm,kona-i2c.txt +++ /dev/null @@ -1,35 +0,0 @@ -Broadcom Kona Family I2C -========================= - -This I2C controller is used in the following Broadcom SoCs: - - BCM11130 - BCM11140 - BCM11351 - BCM28145 - BCM28155 - -Required Properties -------------------- -- compatible: "brcm,bcm11351-i2c", "brcm,kona-i2c" -- reg: Physical base address and length of controller registers -- interrupts: The interrupt number used by the controller -- clocks: clock specifier for the kona i2c external clock -- clock-frequency: The I2C bus frequency in Hz -- #address-cells: Should be <1> -- #size-cells: Should be <0> - -Refer to clocks/clock-bindings.txt for generic clock consumer -properties. - -Example: - -i2c@3e016000 { - compatible = "brcm,bcm11351-i2c","brcm,kona-i2c"; - reg = <0x3e016000 0x80>; - interrupts = <GIC_SPI 103 IRQ_TYPE_LEVEL_HIGH>; - clocks = <&bsc1_clk>; - clock-frequency = <400000>; - #address-cells = <1>; - #size-cells = <0>; -}; diff --git a/Documentation/devicetree/bindings/i2c/brcm,kona-i2c.yaml b/Documentation/devicetree/bindings/i2c/brcm,kona-i2c.yaml new file mode 100644 index 000000000000..7a694af90fc6 --- /dev/null +++ b/Documentation/devicetree/bindings/i2c/brcm,kona-i2c.yaml @@ -0,0 +1,59 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/i2c/brcm,kona-i2c.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Broadcom Kona family I2C controller + +maintainers: + - Florian Fainelli <f.fainelli@gmail.com> + +allOf: + - $ref: /schemas/i2c/i2c-controller.yaml# + +properties: + compatible: + items: + - enum: + - brcm,bcm11351-i2c + - brcm,bcm21664-i2c + - brcm,bcm23550-i2c + - const: brcm,kona-i2c + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + clocks: + maxItems: 1 + + clock-frequency: + enum: [ 100000, 400000, 1000000, 3400000 ] + +required: + - compatible + - reg + - interrupts + - clocks + - clock-frequency + +unevaluatedProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/arm-gic.h> + #include <dt-bindings/interrupt-controller/irq.h> + + i2c@3e016000 { + compatible = "brcm,bcm11351-i2c", "brcm,kona-i2c"; + reg = <0x3e016000 0x80>; + interrupts = <GIC_SPI 103 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&bsc1_clk>; + clock-frequency = <400000>; + #address-cells = <1>; + #size-cells = <0>; + }; +... diff --git a/drivers/i2c/busses/i2c-gxp.c b/drivers/i2c/busses/i2c-gxp.c index d4b55d989a26..8ea3fb5e4c7f 100644 --- a/drivers/i2c/busses/i2c-gxp.c +++ b/drivers/i2c/busses/i2c-gxp.c @@ -353,7 +353,6 @@ static void gxp_i2c_chk_data_ack(struct gxp_i2c_drvdata *drvdata) writew(value, drvdata->base + GXP_I2CMCMD); } -#if IS_ENABLED(CONFIG_I2C_SLAVE) static bool gxp_i2c_slave_irq_handler(struct gxp_i2c_drvdata *drvdata) { u8 value; @@ -437,7 +436,6 @@ static bool gxp_i2c_slave_irq_handler(struct gxp_i2c_drvdata *drvdata) return true; } -#endif static irqreturn_t gxp_i2c_irq_handler(int irq, void *_drvdata) { diff --git a/drivers/i2c/busses/i2c-imx-lpi2c.c b/drivers/i2c/busses/i2c-imx-lpi2c.c index a49b14d52a98..1af0a637d7f1 100644 --- a/drivers/i2c/busses/i2c-imx-lpi2c.c +++ b/drivers/i2c/busses/i2c-imx-lpi2c.c @@ -639,7 +639,7 @@ static int __maybe_unused lpi2c_runtime_suspend(struct device *dev) { struct lpi2c_imx_struct *lpi2c_imx = dev_get_drvdata(dev); - clk_bulk_disable_unprepare(lpi2c_imx->num_clks, lpi2c_imx->clks); + clk_bulk_disable(lpi2c_imx->num_clks, lpi2c_imx->clks); pinctrl_pm_select_sleep_state(dev); return 0; @@ -651,7 +651,7 @@ static int __maybe_unused lpi2c_runtime_resume(struct device *dev) int ret; pinctrl_pm_select_default_state(dev); - ret = clk_bulk_prepare_enable(lpi2c_imx->num_clks, lpi2c_imx->clks); + ret = clk_bulk_enable(lpi2c_imx->num_clks, lpi2c_imx->clks); if (ret) { dev_err(dev, "failed to enable I2C clock, ret=%d\n", ret); return ret; diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c index 2b4e2be51318..4199f57a6bf2 100644 --- a/drivers/i2c/busses/i2c-omap.c +++ b/drivers/i2c/busses/i2c-omap.c @@ -1058,7 +1058,7 @@ omap_i2c_isr(int irq, void *dev_id) u16 stat; stat = omap_i2c_read_reg(omap, OMAP_I2C_STAT_REG); - mask = omap_i2c_read_reg(omap, OMAP_I2C_IE_REG); + mask = omap_i2c_read_reg(omap, OMAP_I2C_IE_REG) & ~OMAP_I2C_STAT_NACK; if (stat & mask) ret = IRQ_WAKE_THREAD; diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c index 6aab84c8d22b..157066f06a32 100644 --- a/drivers/i2c/busses/i2c-tegra.c +++ b/drivers/i2c/busses/i2c-tegra.c @@ -242,9 +242,10 @@ struct tegra_i2c_hw_feature { * @is_dvc: identifies the DVC I2C controller, has a different register layout * @is_vi: identifies the VI I2C controller, has a different register layout * @msg_complete: transfer completion notifier + * @msg_buf_remaining: size of unsent data in the message buffer + * @msg_len: length of message in current transfer * @msg_err: error code for completed message * @msg_buf: pointer to current message data - * @msg_buf_remaining: size of unsent data in the message buffer * @msg_read: indicates that the transfer is a read access * @timings: i2c timings information like bus frequency * @multimaster_mode: indicates that I2C controller is in multi-master mode @@ -277,6 +278,7 @@ struct tegra_i2c_dev { struct completion msg_complete; size_t msg_buf_remaining; + unsigned int msg_len; int msg_err; u8 *msg_buf; @@ -1169,7 +1171,7 @@ static void tegra_i2c_push_packet_header(struct tegra_i2c_dev *i2c_dev, else i2c_writel(i2c_dev, packet_header, I2C_TX_FIFO); - packet_header = msg->len - 1; + packet_header = i2c_dev->msg_len - 1; if (i2c_dev->dma_mode && !i2c_dev->msg_read) *dma_buf++ = packet_header; @@ -1242,20 +1244,32 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev, return err; i2c_dev->msg_buf = msg->buf; + i2c_dev->msg_len = msg->len; - /* The condition true implies smbus block read and len is already read */ - if (msg->flags & I2C_M_RECV_LEN && end_state != MSG_END_CONTINUE) - i2c_dev->msg_buf = msg->buf + 1; - - i2c_dev->msg_buf_remaining = msg->len; i2c_dev->msg_err = I2C_ERR_NONE; i2c_dev->msg_read = !!(msg->flags & I2C_M_RD); reinit_completion(&i2c_dev->msg_complete); + /* + * For SMBUS block read command, read only 1 byte in the first transfer. + * Adjust that 1 byte for the next transfer in the msg buffer and msg + * length. + */ + if (msg->flags & I2C_M_RECV_LEN) { + if (end_state == MSG_END_CONTINUE) { + i2c_dev->msg_len = 1; + } else { + i2c_dev->msg_buf += 1; + i2c_dev->msg_len -= 1; + } + } + + i2c_dev->msg_buf_remaining = i2c_dev->msg_len; + if (i2c_dev->msg_read) - xfer_size = msg->len; + xfer_size = i2c_dev->msg_len; else - xfer_size = msg->len + I2C_PACKET_HEADER_SIZE; + xfer_size = i2c_dev->msg_len + I2C_PACKET_HEADER_SIZE; xfer_size = ALIGN(xfer_size, BYTES_PER_FIFO_WORD); @@ -1295,7 +1309,7 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev, if (!i2c_dev->msg_read) { if (i2c_dev->dma_mode) { memcpy(i2c_dev->dma_buf + I2C_PACKET_HEADER_SIZE, - msg->buf, msg->len); + msg->buf, i2c_dev->msg_len); dma_sync_single_for_device(i2c_dev->dma_dev, i2c_dev->dma_phys, @@ -1352,7 +1366,7 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev, i2c_dev->dma_phys, xfer_size, DMA_FROM_DEVICE); - memcpy(i2c_dev->msg_buf, i2c_dev->dma_buf, msg->len); + memcpy(i2c_dev->msg_buf, i2c_dev->dma_buf, i2c_dev->msg_len); } } @@ -1408,8 +1422,8 @@ static int tegra_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], ret = tegra_i2c_xfer_msg(i2c_dev, &msgs[i], MSG_END_CONTINUE); if (ret) break; - /* Set the read byte as msg len */ - msgs[i].len = msgs[i].buf[0]; + /* Set the msg length from first byte */ + msgs[i].len += msgs[i].buf[0]; dev_dbg(i2c_dev->dev, "reading %d bytes\n", msgs[i].len); } ret = tegra_i2c_xfer_msg(i2c_dev, &msgs[i], end_type); diff --git a/include/linux/i2c.h b/include/linux/i2c.h index 5ba89663ea86..13a1ce38cb0c 100644 --- a/include/linux/i2c.h +++ b/include/linux/i2c.h @@ -385,7 +385,6 @@ static inline void i2c_set_clientdata(struct i2c_client *client, void *data) /* I2C slave support */ -#if IS_ENABLED(CONFIG_I2C_SLAVE) enum i2c_slave_event { I2C_SLAVE_READ_REQUESTED, I2C_SLAVE_WRITE_REQUESTED, @@ -396,9 +395,10 @@ enum i2c_slave_event { int i2c_slave_register(struct i2c_client *client, i2c_slave_cb_t slave_cb); int i2c_slave_unregister(struct i2c_client *client); -bool i2c_detect_slave_mode(struct device *dev); int i2c_slave_event(struct i2c_client *client, enum i2c_slave_event event, u8 *val); +#if IS_ENABLED(CONFIG_I2C_SLAVE) +bool i2c_detect_slave_mode(struct device *dev); #else static inline bool i2c_detect_slave_mode(struct device *dev) { return false; } #endif |