From: Mugunthan V N <mugunthanvnm@ti.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH v3 05/16] spi: Add support for dual and quad mode
Date: Thu, 19 Nov 2015 12:35:34 +0530 [thread overview]
Message-ID: <1447916745-1233-6-git-send-email-mugunthanvnm@ti.com> (raw)
In-Reply-To: <1447916745-1233-1-git-send-email-mugunthanvnm@ti.com>
spi bus can support dual and quad wire data transfers for tx and
rx. So defining dual and quad modes for both tx and rx. Also add
support to parse bus width used for spi tx and rx transfers.
Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
---
drivers/spi/spi-uclass.c | 33 +++++++++++++++++++++++++++++++++
include/spi.h | 4 ++++
2 files changed, 37 insertions(+)
diff --git a/drivers/spi/spi-uclass.c b/drivers/spi/spi-uclass.c
index 58388ef..62d8da7 100644
--- a/drivers/spi/spi-uclass.c
+++ b/drivers/spi/spi-uclass.c
@@ -349,6 +349,7 @@ int spi_slave_ofdata_to_platdata(const void *blob, int node,
struct dm_spi_slave_platdata *plat)
{
int mode = 0;
+ int value;
plat->cs = fdtdec_get_int(blob, node, "reg", -1);
plat->max_hz = fdtdec_get_int(blob, node, "spi-max-frequency", 0);
@@ -360,6 +361,38 @@ int spi_slave_ofdata_to_platdata(const void *blob, int node,
mode |= SPI_CS_HIGH;
if (fdtdec_get_bool(blob, node, "spi-half-duplex"))
mode |= SPI_PREAMBLE;
+
+ /* Device DUAL/QUAD mode */
+ value = fdtdec_get_uint(blob, node, "spi-tx-bus-width", 1);
+ switch (value) {
+ case 1:
+ break;
+ case 2:
+ mode |= SPI_TX_DUAL;
+ break;
+ case 4:
+ mode |= SPI_TX_QUAD;
+ break;
+ default:
+ error("spi-tx-bus-width %d not supported\n", value);
+ break;
+ }
+
+ value = fdtdec_get_uint(blob, node, "spi-rx-bus-width", 1);
+ switch (value) {
+ case 1:
+ break;
+ case 2:
+ mode |= SPI_RX_DUAL;
+ break;
+ case 4:
+ mode |= SPI_RX_QUAD;
+ break;
+ default:
+ error("spi-rx-bus-width %d not supported\n", value);
+ break;
+ }
+
plat->mode = mode;
return 0;
diff --git a/include/spi.h b/include/spi.h
index b4d2723..40dbb4d 100644
--- a/include/spi.h
+++ b/include/spi.h
@@ -23,6 +23,10 @@
#define SPI_LOOP 0x20 /* loopback mode */
#define SPI_SLAVE 0x40 /* slave mode */
#define SPI_PREAMBLE 0x80 /* Skip preamble bytes */
+#define SPI_TX_DUAL 0x100 /* transmit with 2 wires */
+#define SPI_TX_QUAD 0x200 /* transmit with 4 wires */
+#define SPI_RX_DUAL 0x400 /* receive with 2 wires */
+#define SPI_RX_QUAD 0x800 /* receive with 4 wires */
/* SPI transfer flags */
#define SPI_XFER_BEGIN 0x01 /* Assert CS before transfer */
--
2.6.2.280.g74301d6
next prev parent reply other threads:[~2015-11-19 7:05 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-19 7:05 [U-Boot] [PATCH v3 00/16] device model bring-up of ti-qspi on dra72, dra74 and am437x-sk evm Mugunthan V N
2015-11-19 7:05 ` [U-Boot] [PATCH v3 01/16] drivers: spi: ti_qspi: do not hard code chip select for memory map configuration Mugunthan V N
2015-11-19 7:05 ` [U-Boot] [PATCH v3 02/16] drivers: spi:ti_qspi: change ti_qspi_slave to ti_qspi_priv for driver model conversion Mugunthan V N
2015-11-19 7:05 ` [U-Boot] [PATCH v3 03/16] drivers: spi: ti_qspi: prepare driver for DM conversion Mugunthan V N
2015-11-19 7:05 ` [U-Boot] [PATCH v3 04/16] dm: core: Add a new api to get indexed device address Mugunthan V N
2015-11-19 7:05 ` Mugunthan V N [this message]
2015-12-03 16:07 ` [U-Boot] [PATCH v3 05/16] spi: Add support for dual and quad mode Jagan Teki
2015-12-06 6:03 ` Mugunthan V N
2015-12-06 14:43 ` Jagan Teki
2015-12-08 15:05 ` Mugunthan V N
2015-12-08 15:48 ` Jagan Teki
2015-12-15 7:52 ` [U-Boot] [PATCH v4 " Mugunthan V N
2015-12-15 8:13 ` Jagan Teki
2015-12-17 6:30 ` Mugunthan V N
2015-12-17 6:49 ` Jagan Teki
2015-12-17 16:40 ` Jagan Teki
2015-12-20 3:24 ` Mugunthan V N
2015-11-19 7:05 ` [U-Boot] [PATCH v3 06/16] dra7xx_evm: qspi: do not define DM_SPI and DM_SPI_FLASH for spl Mugunthan V N
2015-11-19 7:05 ` [U-Boot] [PATCH v3 07/16] dts: dra7: add spi alias for qspi Mugunthan V N
2015-11-19 7:05 ` [U-Boot] [PATCH v3 08/16] drivers: spi: ti_qspi: convert driver to adopt device driver model Mugunthan V N
2015-12-15 7:52 ` [U-Boot] [PATCH v4 " Mugunthan V N
2015-11-19 7:05 ` [U-Boot] [PATCH v3 09/16] arm: dts: dra7: add qspi register maps for memory map and control module Mugunthan V N
2015-11-19 7:05 ` [U-Boot] [PATCH v3 10/16] drivers: mtd: spi: sf_probe: add compatible for spansion spi flash Mugunthan V N
2015-11-19 10:10 ` Jagan Teki
2015-11-20 6:01 ` Mugunthan V N
2015-11-20 12:27 ` Jagan Teki
2015-11-23 11:29 ` Mugunthan V N
2015-11-23 13:12 ` Jagan Teki
2015-12-03 16:02 ` Jagan Teki
2015-12-06 6:57 ` Mugunthan V N
2015-11-23 15:24 ` Tom Rini
2015-11-19 7:05 ` [U-Boot] [PATCH v3 11/16] drivers: mtd: spi: sf_probe: add compatible for Macronix " Mugunthan V N
2015-11-19 7:05 ` [U-Boot] [PATCH v3 12/16] defconfig: dra72_evm: enable spi driver model Mugunthan V N
2015-11-19 7:05 ` [U-Boot] [PATCH v3 13/16] defconfig: dra74_evm: " Mugunthan V N
2015-11-19 7:05 ` [U-Boot] [PATCH v3 14/16] am43xx_evm: qspi: do not define DM_SPI and DM_SPI_FLASH for spl Mugunthan V N
2015-11-21 1:20 ` Tom Rini
2015-11-19 7:05 ` [U-Boot] [PATCH v3 15/16] arm: dts: am4372: add qspi register maps for memory map Mugunthan V N
2015-11-19 7:05 ` [U-Boot] [PATCH v3 16/16] defconfig: am437x_sk_evm: enable spi driver model Mugunthan V N
2015-12-01 6:31 ` [U-Boot] [PATCH v3 00/16] device model bring-up of ti-qspi on dra72, dra74 and am437x-sk evm Mugunthan V N
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1447916745-1233-6-git-send-email-mugunthanvnm@ti.com \
--to=mugunthanvnm@ti.com \
--cc=u-boot@lists.denx.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.