Re: [PATCH v3 02/16] mfd: da8xx-cfgchip: New header file for CFGCHIP registers.

From: Sergei Shtylyov
Date: Fri Mar 25 2016 - 13:23:11 EST


On 03/25/2016 02:51 AM, David Lechner wrote:

We will be using a generic syscon device for the TI DA8XX SoC CFGCHIPx
retisters. This will be used by a number of planned drivers including a
new USB PHY driver and common clock framework drivers.

The same defines are removed from the platform_data header file since they
are now redundant and they didn't really belong there anyway.

Signed-off-by: David Lechner <david@xxxxxxxxxxxxxx>
---

v3 changes: This is a new patch. It replaces the previous patch that just added
some missing CFGCHIP2 registers to the platform_data/usb-davinci.h file.
I took David Laight's advice and included all of the possible registers.

Many of these registers will be used for clocks - hopefully in the near future.


include/linux/mfd/da8xx-cfgchip.h | 160 ++++++++++++++++++++++++++++++
include/linux/platform_data/usb-davinci.h | 23 -----
2 files changed, 160 insertions(+), 23 deletions(-)
create mode 100644 include/linux/mfd/da8xx-cfgchip.h

diff --git a/include/linux/mfd/da8xx-cfgchip.h b/include/linux/mfd/da8xx-cfgchip.h
new file mode 100644
index 0000000..6940cf9
--- /dev/null
+++ b/include/linux/mfd/da8xx-cfgchip.h
@@ -0,0 +1,160 @@
[...]
+/* register offsets */
+#define CFGCHIP_REG(n) (n * 4)
+#define CFGCHIP0_REG CFGCHIP_REG(0)
+#define CFGCHIP1_REG CFGCHIP_REG(1)
+#define CFGCHIP2_REG CFGCHIP_REG(2)
+#define CFGCHIP3_REG CFGCHIP_REG(3)
+#define CFGCHIP4_REG CFGCHIP_REG(4)

Why not just use CFGCHIP_REG(n) directly?

[...]
diff --git a/include/linux/platform_data/usb-davinci.h b/include/linux/platform_data/usb-davinci.h
index e0bc4ab..7c6ce24 100644
--- a/include/linux/platform_data/usb-davinci.h
+++ b/include/linux/platform_data/usb-davinci.h
[...]
@@ -53,7 +31,6 @@ struct da8xx_ohci_root_hub {
/* Time from power on to power good (in 2 ms units) */
u8 potpgt;
};
-

Why?

void davinci_setup_usb(unsigned mA, unsigned potpgt_ms);

#endif /* ifndef __ASM_ARCH_USB_H */

MBR, Sergei