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Date: Wed, 23 Sep 2015 01:31:19 +0100
From: Lee Jones <lee.jones@...aro.org>
To: Aaron Sierra <asierra@...-inc.com>
Cc: linux-kernel <linux-kernel@...r.kernel.org>,
Peter Tyser <ptyser@...-inc.com>,
Guenter Roeck <linux@...ck-us.net>,
Jean Delvare <jdelvare@...e.com>,
Samuel Ortiz <sameo@...ux.intel.com>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
Mika Westerberg <mika.westerberg@...ux.intel.com>,
Matt Fleming <matt.fleming@...el.com>
Subject: Re: [PATCH v2] mfd: lpc_ich: Separate device cells for clarity
On Tue, 22 Sep 2015, Aaron Sierra wrote:
> The lpc_ich_cells array gives the wrong impression about the
> relationship between the watchdog and GPIO devices. They are
> completely distinct devices, so this patch separates the
> array into distinct mfd_cell structs per device.
>
> A side effect of removing the array, is that the lpc_cells enum
> is no longer needed.
>
> Signed-off-by: Aaron Sierra <asierra@...-inc.com>
> ---
> v2 - rebase onto 4.3-rc2
>
> drivers/mfd/lpc_ich.c | 42 ++++++++++++++++++------------------------
> 1 file changed, 18 insertions(+), 24 deletions(-)
Looks like you didn't apply Andy's Ack!
Applied with Andy's Ack.
> diff --git a/drivers/mfd/lpc_ich.c b/drivers/mfd/lpc_ich.c
> index c5a9a08..b514f3c 100644
> --- a/drivers/mfd/lpc_ich.c
> +++ b/drivers/mfd/lpc_ich.c
> @@ -132,24 +132,18 @@ static struct resource gpio_ich_res[] = {
> },
> };
>
> -enum lpc_cells {
> - LPC_WDT = 0,
> - LPC_GPIO,
> +static struct mfd_cell lpc_ich_wdt_cell = {
> + .name = "iTCO_wdt",
> + .num_resources = ARRAY_SIZE(wdt_ich_res),
> + .resources = wdt_ich_res,
> + .ignore_resource_conflicts = true,
> };
>
> -static struct mfd_cell lpc_ich_cells[] = {
> - [LPC_WDT] = {
> - .name = "iTCO_wdt",
> - .num_resources = ARRAY_SIZE(wdt_ich_res),
> - .resources = wdt_ich_res,
> - .ignore_resource_conflicts = true,
> - },
> - [LPC_GPIO] = {
> - .name = "gpio_ich",
> - .num_resources = ARRAY_SIZE(gpio_ich_res),
> - .resources = gpio_ich_res,
> - .ignore_resource_conflicts = true,
> - },
> +static struct mfd_cell lpc_ich_gpio_cell = {
> + .name = "gpio_ich",
> + .num_resources = ARRAY_SIZE(gpio_ich_res),
> + .resources = gpio_ich_res,
> + .ignore_resource_conflicts = true,
> };
>
> /* chipset related info */
> @@ -841,7 +835,7 @@ static int lpc_ich_finalize_wdt_cell(struct pci_dev *dev)
> struct itco_wdt_platform_data *pdata;
> struct lpc_ich_priv *priv = pci_get_drvdata(dev);
> struct lpc_ich_info *info;
> - struct mfd_cell *cell = &lpc_ich_cells[LPC_WDT];
> + struct mfd_cell *cell = &lpc_ich_wdt_cell;
>
> pdata = devm_kzalloc(&dev->dev, sizeof(*pdata), GFP_KERNEL);
> if (!pdata)
> @@ -860,7 +854,7 @@ static int lpc_ich_finalize_wdt_cell(struct pci_dev *dev)
> static void lpc_ich_finalize_gpio_cell(struct pci_dev *dev)
> {
> struct lpc_ich_priv *priv = pci_get_drvdata(dev);
> - struct mfd_cell *cell = &lpc_ich_cells[LPC_GPIO];
> + struct mfd_cell *cell = &lpc_ich_gpio_cell;
>
> cell->platform_data = &lpc_chipset_info[priv->chipset];
> cell->pdata_size = sizeof(struct lpc_ich_info);
> @@ -904,7 +898,7 @@ static int lpc_ich_init_gpio(struct pci_dev *dev)
> base_addr = base_addr_cfg & 0x0000ff80;
> if (!base_addr) {
> dev_notice(&dev->dev, "I/O space for ACPI uninitialized\n");
> - lpc_ich_cells[LPC_GPIO].num_resources--;
> + lpc_ich_gpio_cell.num_resources--;
> goto gpe0_done;
> }
>
> @@ -918,7 +912,7 @@ static int lpc_ich_init_gpio(struct pci_dev *dev)
> * the platform_device subsystem doesn't see this resource
> * or it will register an invalid region.
> */
> - lpc_ich_cells[LPC_GPIO].num_resources--;
> + lpc_ich_gpio_cell.num_resources--;
> acpi_conflict = true;
> } else {
> lpc_ich_enable_acpi_space(dev);
> @@ -958,12 +952,12 @@ gpe0_done:
>
> lpc_ich_finalize_gpio_cell(dev);
> ret = mfd_add_devices(&dev->dev, PLATFORM_DEVID_AUTO,
> - &lpc_ich_cells[LPC_GPIO], 1, NULL, 0, NULL);
> + &lpc_ich_gpio_cell, 1, NULL, 0, NULL);
>
> gpio_done:
> if (acpi_conflict)
> pr_warn("Resource conflict(s) found affecting %s\n",
> - lpc_ich_cells[LPC_GPIO].name);
> + lpc_ich_gpio_cell.name);
> return ret;
> }
>
> @@ -1007,7 +1001,7 @@ static int lpc_ich_init_wdt(struct pci_dev *dev)
> */
> if (lpc_chipset_info[priv->chipset].iTCO_version == 1) {
> /* Don't register iomem for TCO ver 1 */
> - lpc_ich_cells[LPC_WDT].num_resources--;
> + lpc_ich_wdt_cell.num_resources--;
> } else if (lpc_chipset_info[priv->chipset].iTCO_version == 2) {
> pci_read_config_dword(dev, RCBABASE, &base_addr_cfg);
> base_addr = base_addr_cfg & 0xffffc000;
> @@ -1035,7 +1029,7 @@ static int lpc_ich_init_wdt(struct pci_dev *dev)
> goto wdt_done;
>
> ret = mfd_add_devices(&dev->dev, PLATFORM_DEVID_AUTO,
> - &lpc_ich_cells[LPC_WDT], 1, NULL, 0, NULL);
> + &lpc_ich_wdt_cell, 1, NULL, 0, NULL);
>
> wdt_done:
> return ret;
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
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