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SubjectRe: [PATCH 9/9] spi: atmel-quadspi: add support for sam9x60 qspi controller
Date


On 01/30/2019 07:43 PM, Boris Brezillon wrote:
> On Wed, 30 Jan 2019 15:08:47 +0000
> <Tudor.Ambarus@microchip.com> wrote:
>
>> +static int atmel_sam9x60_qspi_clk_prepare_enable(struct atmel_qspi *aq)
>> +{
>> + struct device *dev = &aq->pdev->dev;
>> + int ret;
>> +
>> + if (!aq->clk) {
>> + /* Get the peripheral clock */
>> + aq->clk = devm_clk_get(dev, "pclk");
>> + if (IS_ERR(aq->clk)) {
>> + dev_err(dev, "missing peripheral clock\n");
>> + return PTR_ERR(aq->clk);
>> + }
>> + }
>> +
>> + if (!aq->qspick) {
>> + /* Get the QSPI system clock */
>> + aq->qspick = devm_clk_get(dev, "qspick");
>> + if (IS_ERR(aq->qspick)) {
>> + dev_err(dev, "missing system clock\n");
>> + return PTR_ERR(aq->qspick);
>> + }
>> + }
>
> Move the devm_clk_get() calls to the probe path instead of doing it at
> prepare time, and you can make it generic for both compats with
> something like:
>
> aq->clk = devm_clk_get(dev, "pclk");
> if (IS_ERR(aq->clk))
> aq->clk = devm_clk_get(dev, NULL);
>
> if (IS_ERR(aq->clk))
> return PTR_ERR(aq->clk);
>
> if (aq->caps->qspick_required) {
> aq->qspick = devm_clk_get(dev, "qspick");
> if (IS_ERR(aq->qspick)) {
> return PTR_ERR(aq->qspick);
> }

good tip, will do, thanks!

ta
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