Re: [PATCHv2] usb: typec: tps6598x: handle block writes separately with plain-I2C adapters

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On Wed, 20 Feb 2019, Greg Kroah-Hartman wrote:
On Wed, Feb 20, 2019 at 01:57:30PM +0100, Nikolaus Voss wrote:
Commit 1a2f474d328f handles block _reads_ separately with plain-I2C
adapters, but the problem described with regmap-i2c not handling
SMBus block transfers (i.e. read and writes) correctly also exists
with writes.

As workaround, this patch adds a block write function the same way
1a2f474d328f adds a block read function.

Fixes: 1a2f474d328f ("usb: typec: tps6598x: handle block reads separately with plain-I2C adapters")
Fixes: 0a4c005bd171 ("usb: typec: driver for TI TPS6598x USB Power Delivery controllers")
Signed-off-by: Nikolaus Voss <nikolaus.voss@xxxxxxxxxxxxxxxxxxxxx>
---

As was pointed out, you have to have a From: that matches a
signed-off-by somewhere here.  If your company email systems is horrid
and can not handle patches, then put the correct from: line as the first
line of the commit message as the documentation says and all will be
good.



v2: fix tps6598x_exec_cmd also
---
 drivers/usb/typec/tps6598x.c | 26 ++++++++++++++++++++------
 1 file changed, 20 insertions(+), 6 deletions(-)

diff --git a/drivers/usb/typec/tps6598x.c b/drivers/usb/typec/tps6598x.c
index c84c8c189e90..c54b73fb2a2f 100644
--- a/drivers/usb/typec/tps6598x.c
+++ b/drivers/usb/typec/tps6598x.c
@@ -110,6 +110,20 @@ tps6598x_block_read(struct tps6598x *tps, u8 reg, void *val, size_t len)
 	return 0;
 }

+static int tps6598x_block_write(struct tps6598x *tps, u8 reg,
+				void *val, size_t len)
+{
+	u8 data[len + 1];

I thought the build system now warned when you did this :(

I must admit I'm developing on 4.19 stable series, so no warnings...

Nikolaus



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