Re: [PATCH v5 0/6] bcm2835: auxiliar device support for spi

[ Sending again in plain text ] Noralf pointed me at fixed-factor-clock, and that works in our (downstream) environment: soc: soc { ... uart1: uart@7e215040 { compatible = "brcm,bcm2835-aux-uart", "ns16550"; reg = <0x7e215040 0x40>;

Re: [PATCH v5 0/6] bcm2835: auxiliar device support for spi

> On 10.09.2015, at 17:48, Noralf Trønnes wrote: > > This looks interesting. > But there's a challenge with the uart1 and the 8250 driver. > > Phil Elwell has this to say: > This means that that UART1 isn't an exact clone of a 8250 UART. > In a particular, the clock divisor is calculated

Re: [PATCH v5 0/6] bcm2835: auxiliar device support for spi

Den 09.09.2015 03:48, skrev Eric Anholt: ker...@martin.sperl.org writes: From: Martin Sperl The BCM2835 contains 3 auxiliar devices: * spi1 * spi2 * uart1 All of those 3 devices are enabled/disabled via a shared register, which is set by default to be disabled. Access to this register

Re: [PATCH v5 0/6] bcm2835: auxiliar device support for spi

Den 09.09.2015 03:48, skrev Eric Anholt: ker...@martin.sperl.org writes: From: Martin Sperl The BCM2835 contains 3 auxiliar devices: * spi1 * spi2 * uart1 All of those 3 devices are enabled/disabled via a shared register, which is set by default to be disabled.

Re: [PATCH v5 0/6] bcm2835: auxiliar device support for spi

[ Sending again in plain text ] Noralf pointed me at fixed-factor-clock, and that works in our (downstream) environment: soc: soc { ... uart1: uart@7e215040 { compatible = "brcm,bcm2835-aux-uart", "ns16550"; reg = <0x7e215040 0x40>;

Re: [PATCH v5 0/6] bcm2835: auxiliar device support for spi

> On 10.09.2015, at 17:48, Noralf Trønnes wrote: > > This looks interesting. > But there's a challenge with the uart1 and the 8250 driver. > > Phil Elwell has this to say: > This means that that UART1 isn't an exact clone of a 8250 UART. > In a particular, the clock divisor

Re: [PATCH v5 0/6] bcm2835: auxiliar device support for spi

Alexander Stein writes: > Hi, > On Tuesday 08 September 2015 18:48:07, Eric Anholt wrote: >> I finally had a chance to sit down and look at what the hardware's doing >> with the enable bit (also, I've read a whole lot more of the hardware >> now, so I'm a lot faster at answering questions like

Re: [PATCH v5 0/6] bcm2835: auxiliar device support for spi

Hi, On Tuesday 08 September 2015 18:48:07, Eric Anholt wrote: > I finally had a chance to sit down and look at what the hardware's doing > with the enable bit (also, I've read a whole lot more of the hardware > now, so I'm a lot faster at answering questions like this). The enable > bits are a

Re: [PATCH v5 0/6] bcm2835: auxiliar device support for spi

Hi, On Tuesday 08 September 2015 18:48:07, Eric Anholt wrote: > I finally had a chance to sit down and look at what the hardware's doing > with the enable bit (also, I've read a whole lot more of the hardware > now, so I'm a lot faster at answering questions like this). The enable > bits are a

Re: [PATCH v5 0/6] bcm2835: auxiliar device support for spi

Alexander Stein writes: > Hi, > On Tuesday 08 September 2015 18:48:07, Eric Anholt wrote: >> I finally had a chance to sit down and look at what the hardware's doing >> with the enable bit (also, I've read a whole lot more of the hardware >> now, so I'm a lot faster at

Re: [PATCH v5 0/6] bcm2835: auxiliar device support for spi

ker...@martin.sperl.org writes: > From: Martin Sperl > > The BCM2835 contains 3 auxiliar devices: > * spi1 > * spi2 > * uart1 > > All of those 3 devices are enabled/disabled via a shared register, > which is set by default to be disabled. > > Access to this register needs to get serialized. > >

Re: [PATCH v5 0/6] bcm2835: auxiliar device support for spi

ker...@martin.sperl.org writes: > From: Martin Sperl > > The BCM2835 contains 3 auxiliar devices: > * spi1 > * spi2 > * uart1 > > All of those 3 devices are enabled/disabled via a shared register, > which is set by default to be disabled. > > Access to this register

[PATCH v5 0/6] bcm2835: auxiliar device support for spi

From: Martin Sperl The BCM2835 contains 3 auxiliar devices: * spi1 * spi2 * uart1 All of those 3 devices are enabled/disabled via a shared register, which is set by default to be disabled. Access to this register needs to get serialized. So after several iterations of discussions with the

[PATCH v5 0/6] bcm2835: auxiliar device support for spi

From: Martin Sperl The BCM2835 contains 3 auxiliar devices: * spi1 * spi2 * uart1 All of those 3 devices are enabled/disabled via a shared register, which is set by default to be disabled. Access to this register needs to get serialized. So after several iterations of