Messages in this thread | | | Date | Thu, 29 Sep 2011 00:21:29 -0400 (EDT) | From | Nicolas Pitre <> | Subject | Re: [PATCH 2/2] msm: Support DEBUG_LL on MSM8660 and MSM8960 |
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On Wed, 28 Sep 2011, Stephen Boyd wrote:
> Add support for DEBUG_LL on the 8660 and 8960 development boards. > While we're here, cleanup the uncompress.h code a bit. > > Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> > ---
[...]
> .macro senduart,rd,rx > +#ifdef CONFIG_MSM_HAS_DEBUG_UART_HS > + @ Clear TX_READY by writing to the UARTDM_CR register > + mov r12, #0x300 > + str r12, [\rx, #0x10] > + @ Write 0x1 to NCF register > + mov r12, #0x1 > + str r12, [\rx, #0x40] > + @ UARTDM reg. Read to induce delay > + ldr r12, [\rx, #0x08] > + @ Write the 1 character to UARTDM_TF > + str \rd, [\rx, #0x70]
This is a really bad idea to pick a register (r12) when the calling code is completely unaware of that. This _will_ break on you someday.
Except for the last line, why didn't you simply fold this code into the waituart macro instead?
Nicolas
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